# Verifalia

> Verifalia is an email verification service run by Cobisi Research in Italy since 2005, distinguished by three configurable quality levels that let you decide how much effort each check gets: Standard runs one pass in about five seconds for one credit, High runs three passes over roughly fifty seconds for two credits, and Extreme runs nine passes over about two minutes for four credits. Every address is classified as Deliverable, Undeliverable, Risky, or Unknown and tagged with one of more than forty distinct status codes, and the service is sold either through subscription plans carrying daily free credits or through non-expiring credit packs from 500 to ten million.

- Category: Email Verification (https://saastracker.org/categories/email-verification)
- Website: https://verifalia.com
- Starting price: $0 for the Free plan with 25 credits a day, then $9 per month for Starter
- Free plan: Free plan forever: 25 credits per day, unlimited additional verifications through purchased credit packs, 5 classification override rules.
- Free trial: No time-limited trial; the permanently free plan with 25 credits a day is the evaluation path
- Founded: 2005, HQ: Vigonza, Italy, Ownership: Privately held and self-funded; Verifalia is operated by Cobisi Research
- Profile last reviewed: 2026-08-22
- Canonical profile: https://saastracker.org/products/verifalia

## Overview

Verifalia has been running since 2005, which in this category is close to prehistoric. It is the service arm of Cobisi Research, a privately held, self-funded Italian software company in Vigonza near Padua that also sells developer tooling, and it claims more than 100,000 customers with roughly 30 percent of them Fortune and Global 500 organisations. That combination, two decades of operation, no venture capital, and a European base, produces a product that feels engineered rather than marketed.

The idea that separates Verifalia from the field is the quality level. Most verifiers make a single fixed attempt and then classify. Verifalia lets you choose per verification: Standard is one pass in around five seconds costing one credit, High is three passes over roughly fifty seconds for two credits, and Extreme is nine passes over about two minutes for four credits. The extra passes exist to work through temporary conditions, a mailbox over quota, a greylisting server deferring a first connection, a provider throttling verification traffic, which a single-pass verifier reports as unknown and moves on from. You are effectively buying retries, priced honestly.

The reporting is correspondingly granular. Rather than a four-way verdict and a vague reason, Verifalia assigns one of more than forty distinct status codes, so a report tells you specifically why an address failed rather than that it did. Around that sit a set of controls that no budget verifier offers: configurable data retention from five minutes to thirty days, custom classification schemes and per-account override rules, sub-users with individual permissions, firewall and throttling rules, mutual TLS client certificates, and bot protection on the embeddable form widget through Cloudflare Turnstile, reCAPTCHA, or hCaptcha.

Where Verifalia is weakest is the same place most of the field is weakest. It detects catch-all servers and classifies them as risky, and it does not try to resolve which mailboxes exist behind them. High and Extreme quality levels help with temporarily unreachable mailboxes, not with domains that answer yes to everything by design. If your list is B2B and thick with accept-all domains, more retries will not produce more answers, and a specialist such as Truelist, Scrubby, or BounceBan is the tool for that job.

## How it works

1. You sign up for free, which gives 25 credits a day forever, and either paste addresses into the client area, upload a file, or call the API. Bulk uploads accept plain text, CSV, TSV, and Excel files up to 100MB, which is roughly 72 million addresses in a single list.

2. For each verification you choose a quality level. Standard makes one pass in around five seconds and costs one credit, High makes three passes over about fifty seconds and costs two, and Extreme makes nine passes over about two minutes and costs four. The API lets you set this per request alongside timeout, deduplication, data retention, and callback preferences.

3. The engine checks syntax, domain and MX records, and mailbox existence in real time against the target mail exchanger using fresh, uncached data, and flags free providers, disposable addresses, role accounts, catch-all servers, and likely typos with a suggested correction produced by machine learning models.

4. Results come back classified as Deliverable, Undeliverable, Risky, or Unknown with one of more than forty status codes attached. You can override the classification scheme, mapping specific status codes to your own verdicts, and add wildcard override rules such as always treating a given domain a particular way. Cleaned lists download from the client area, arrive by callback, or feed straight back through the API on a rolling schedule.

## Best for

Developer-led teams and long-lived European businesses that want fine-grained control over verification depth, detailed status codes rather than a bare verdict, configurable data retention, and a vendor with twenty years of continuous operation and a real EU legal entity behind it.

## Not the right fit for

- B2B outbound teams whose main problem is accept-all domains; Verifalia classifies catch-all servers as risky and makes no attempt to resolve the mailboxes behind them, and no amount of extra passes changes that.
- Buyers who want a single upfront price for a fixed list size, because the daily-credit plan structure and multi-currency dynamic pricing make the total for a one-off clean genuinely harder to work out than a flat ladder.
- Anyone needing to verify a large list in a single day on a subscription plan, since the free credits are metered per day and expire nightly, so a 100,000-row rush job needs a credit pack rather than a plan.
- Teams who want ESP-native cleaning inside Mailchimp, Klaviyo, or Braze at the click of a button; Verifalia's strength is the API, the SDKs, and the widget rather than a long list of turnkey marketing connectors.
- Buyers who require a published SOC 2 Type 2 or ISO 27001 report in the vendor file, which Verifalia does not advertise despite a strong technical security posture.

## Features

### Quality levels and verification depth

The dial that makes Verifalia different from a fixed-effort verifier.

- **Standard quality level**: One verification pass completing in around five seconds at a cost of one credit, which is the default and the right setting for most addresses.
- **High quality level**: Three passes over roughly fifty seconds for two credits, aimed at addresses where a single attempt hits a temporary condition such as greylisting or a throttling provider.
- **Extreme quality level**: Nine passes over about two minutes for four credits, reserved for the hardest mail servers where you would otherwise accept an unknown, including providers that have hardened against verification traffic.
- **Per-request configuration**: Quality level, waiting timeout, deduplication preference, data retention window, and callback behaviour are all settable per individual verification through the API rather than as an account-wide setting.
- **Real-time uncached verification**: Verifalia states that checks run live against the target mail exchanger using fresh data rather than being served from a cached result database, which is the distinction that matters on addresses that changed status recently.
- **Premium handling for difficult providers**: The vendor calls out exclusive premium verification paths for hard servers including Yahoo, and its public update log shows it actively chasing provider-side security changes rather than quietly returning unknowns.

### Classification and reporting

Forty status codes instead of a shrug.

- **Four-way classification**: Deliverable, Undeliverable, Risky, and Unknown, matching the category convention so results map cleanly onto existing send rules.
- **More than forty status codes**: Each address carries a specific code explaining the classification, so a report distinguishes between a non-existent mailbox, a rejected domain, a server timeout, and a policy block rather than lumping them together.
- **Custom classification scheme**: Advanced accounts can redefine which status codes map to which classification, so an organisation with a particular risk appetite can decide for itself what counts as deliverable.
- **Classification overrides**: Wildcard rules such as always treating addresses at a given domain a specific way, allotted at 5 rules on Starter, 10 on Professional, 50 on Enterprise, and 100 on Ultimate.
- **Typo detection and suggestions**: Machine learning models correct common misspellings and propose alternative spellings, which turns a rejected address into a recoverable one at the point of capture.
- **Free and disposable provider flagging**: Marks addresses at free providers such as Gmail and Yahoo and at disposable or throwaway services, so signup flows can apply different rules to each.
- **Role account and catch-all detection**: Identifies shared mailboxes such as info@ and sales@ and detects accept-all servers, classifying the latter as risky rather than attempting to resolve them.
- **Free deduplication**: Two deduplication algorithms are always free and never consume credits, so you do not pay to verify the same address twice in one list.

### Developer surface

The best-supported API and SDK set of any verifier in this category.

- **Open-source SDKs in six languages**: Free and open-source client libraries for .NET, Go, Java, JavaScript for both Node.js and the browser, PHP, and Ruby, actively versioned and published to package registries.
- **Single and bulk API**: The same API prevents bad addresses entering a system at signup and verifies exported databases in batch on a rolling schedule, so one integration covers both jobs.
- **Embeddable verification widget**: A JavaScript widget that verifies at the point of capture with no coding, integrating with native HTML5 form validation and with Marketo, HubSpot, FormStack, FormSite, Instapage, KickoffLabs, Leadpages, Unbounce, jQuery Validation, Parsley, and others.
- **Bot and CAPTCHA protection**: The widget supports Cloudflare Turnstile, Google reCAPTCHA, and hCaptcha so automated traffic cannot burn your credits or trigger throttling for real users.
- **Callbacks and webhooks**: Configurable callback preferences per verification let long-running Extreme-level jobs notify your system rather than requiring polling.
- **Bulk file handling at scale**: Plain text, CSV, TSV, XLS, and XLSX inputs up to 100MB, which the vendor puts at roughly 72 million addresses in a single list.

### Account controls, security, and multi-tenancy

Features built for resellers and regulated buyers rather than for marketers.

- **Configurable data retention**: Retention is settable from five minutes to thirty days, per verification if you want, which is the most explicit and granular retention control published by any verifier profiled here.
- **Sub-users with permissions**: Premium plans support multiple users and connected browser apps under one account with individual permissions, designed for sharing across employees or clients.
- **Firewall and throttling rules**: Per-user network restrictions and rate controls, which is how a reseller stops one client's runaway script from consuming the shared balance.
- **Mutual TLS client certificates**: Client certificates can be linked to users for mutual TLS authentication, which is a genuinely enterprise control offered without an enterprise contract.
- **TLS 1.3 and TOTP multi-factor authentication**: Modern transport security and app-based two-factor authentication on the account itself, rather than password-only access to a list of customer email addresses.
- **Multi-currency billing**: Prices are quoted in more than twenty currencies including USD, EUR, GBP, CAD, AUD, INR, and JPY, which removes conversion friction for non-US buyers.

### Commercial structure

Daily free credits on plans, non-expiring packs for everything else.

- **Daily free credits on every plan**: Free gives 25 credits a day, Starter 250, Professional 1,250, Enterprise 6,250, and Ultimate 25,000. Unused daily credits expire at midnight UTC rather than accumulating.
- **Non-expiring credit packs**: Packs from 500 credits to ten million, purchased separately from any plan, which never expire and are consumed only after the daily free allowance is used.
- **Free plan forever**: 25 credits a day with no card, which is 9,125 verifications a year at zero cost and by far the most patient evaluation path in the category.
- **Billing cycle discounts**: Quarterly billing saves 5 percent and yearly billing saves 10 percent against the monthly rate on subscription plans.
- **Tiered processing speed**: Higher plans get faster processing of submitted lists, which is a soft priority queue rather than a published throughput number.

## Use cases

- **Developer embedding verification in a signup flow**: Fake and mistyped signups are polluting the user table, and the team wants verification inside the product rather than as a marketing tool bolted on afterwards. Outcome: The open-source SDK for their language drops in, Standard quality returns in about five seconds at the point of capture, typo suggestions recover users who fat-fingered a domain, and the widget with Turnstile protection covers the marketing forms nobody wants to touch.
- **European company with a strict retention policy**: Legal will not approve a vendor that holds customer email addresses indefinitely on servers in an unspecified jurisdiction. Outcome: Data retention is configured down to five minutes per verification, the counterparty is an Italian company that has been trading since 2005, and TLS 1.3, mutual TLS certificates, and TOTP two-factor cover the technical questions on the form.
- **Agency reselling verification to clients**: Several clients need cleaning under one account, and the agency needs to stop one client's integration exhausting the shared credit balance. Outcome: Sub-users with individual permissions, firewall and throttling rules, and per-user client certificates make a single Verifalia account behave like several isolated ones, with non-expiring packs absorbing lumpy demand.
- **Data team fighting a stubborn unknown bucket**: A conventional verifier returns a few thousand unknowns on every list, mostly greylisting servers and throttled providers rather than accept-all domains. Outcome: Re-running just that segment at High or Extreme quality spends two or four credits per address and resolves most of it, which is far cheaper than treating temporary failures as permanent and deleting real contacts.

## Pricing

Two stacked mechanisms: subscription plans that grant a fixed number of free credits every day and unlock premium account features, plus non-expiring credit packs from 500 to ten million that are consumed only after the daily allowance runs out. Credit cost per verification varies by quality level: 1 for Standard, 2 for High, 4 for Extreme.

- **Free**: $0 per month, 25 credits per day. 25 free verifications daily, expiring at midnight UTC; Full result set including status codes and typo suggestions; API access and SDKs; Credit packs can be bought on top at any time. Roughly 9,125 free verifications a year, which is a genuinely useful allowance rather than a token.
- **Starter**: $9 per month, 250 credits per day. About 7,500 credits a month if fully used, so roughly $0.0012 each; 5 classification override rules; Faster processing than Free; Non-expiring packs available on top.
- **Professional**: $49 per month, 1,250 credits per day. About 37,500 credits a month if fully used, so roughly $0.0013 each; 10 classification override rules; Premium account features including sub-users; The vendor's most popular tier.
- **Enterprise**: $199 per month, 6,250 credits per day. About 187,500 credits a month if fully used, so roughly $0.00106 each; 50 classification override rules; Firewall, throttling, and client certificate controls; Priority processing.
- **Ultimate**: $499 per month, 25,000 credits per day. About 750,000 credits a month if fully used, so roughly $0.00067 each; 100 classification override rules; Highest processing priority; Best effective rate on the subscription path. Only worth it if your volume is genuinely spread across the month, because unused daily credits expire nightly.

Billing notes:

- Comparing Verifalia at fixed volumes takes a moment of arithmetic because plans meter daily. Fully consuming a plan's daily allowance every day works out to roughly $0.0012 per credit on Starter, $0.0013 on Professional, $0.00106 on Enterprise, and $0.00067 on Ultimate, which places Verifalia among the cheaper options in the category on a per-address basis.
- For one-off cleans the relevant instrument is the credit pack, which runs from around $0.0079 per credit at the smallest 500-credit size down to about $0.00049 at the largest pack sizes. On that basis, 10,000 addresses land in the low tens of dollars, 100,000 in the low hundreds, and 1,000,000 in the high hundreds, all at Standard quality.
- Exact pack prices are rendered dynamically on the pricing page in your chosen currency across more than twenty options, which is convenient for non-US buyers and means there is no single fixed published ladder to quote.
- Every figure above assumes Standard quality. High doubles the credit cost and Extreme quadruples it, so a list run entirely at Extreme costs four times the headline number. Used properly, higher levels apply only to the residue that Standard could not resolve.
- Daily free credits expire at midnight UTC and do not roll over. Purchased pack credits never expire. That asymmetry rewards steady usage and punishes bursty projects on a subscription, which is exactly the wrong way round for a one-off list clean, so buy packs for projects and plans for ongoing flow.
- Quarterly billing takes 5 percent off and annual billing 10 percent off the monthly plan rate. Support is free of charge on every tier including Free.

Value assessment: Verifalia offers more control per dollar than anything else in this category, and the value depends entirely on whether you want that control. On raw price it is competitive rather than cheapest: roughly $0.001 per Standard credit on a well-used plan sits near MyEmailVerifier and Truelist and well under Kickbox or Scrubby. What you get on top is a dial for verification depth, forty-plus status codes, retention settable to five minutes, sub-users with certificates and throttling, six open-source SDKs, and a bot-protected form widget, from a company that has been trading since 2005 without outside capital. For a developer-led team or a reseller that is exceptional value. For a marketer who wants to drag a CSV into a box and get a clean file back, most of it is machinery they will never touch, and a simpler vendor at a similar price will feel better. The one thing no amount of money buys here is catch-all resolution, and that is the question to settle before anything else.

## Strengths

- Configurable quality levels are a genuinely useful and honestly priced idea: buy more retries only for the addresses that need them, at two or four credits instead of one.
- More than forty distinct status codes make reports diagnostic rather than merely classificatory, and the classification scheme itself can be redefined per account.
- Twenty years of continuous operation as a self-funded Italian company with more than 100,000 customers, which is unmatched longevity in a category full of three-year-old vendors.
- The best developer surface here: open-source SDKs for six language ecosystems, per-request configuration of quality, timeout, deduplication, retention, and callbacks, plus a no-code embeddable widget with CAPTCHA support.
- Data retention configurable from five minutes to thirty days is the most explicit privacy control published by any verifier in this set.
- Genuine multi-tenancy for agencies and resellers: sub-users, individual permissions, firewall and throttling rules, and mutual TLS client certificates.
- A free plan giving 25 credits every day forever, roughly 9,125 verifications a year, plus free support on every tier including free accounts.
- Public, specific transparency about incidents and provider changes, including openly documenting a period when Yahoo verification degraded and when it was fixed.

## Limitations

- No catch-all resolution. Accept-all servers are detected and classified as risky, and extra quality passes do not help, because the problem is a server that answers yes by design rather than a temporary failure.
- Subscription plans meter credits daily and unused credits expire at midnight UTC, which makes them a poor fit for a bursty one-off clean and forces pack purchases for project work.
- There is no single fixed published price ladder; pack prices render dynamically per currency, which makes cross-vendor comparison more effortful than it should be.
- No SOC 2 Type 2 or ISO 27001 report is advertised, despite a strong technical security posture, so certification-driven procurement processes will hit a wall.
- Short list of turnkey marketing integrations compared with Kickbox or Mailfloss; the widget covers form platforms well but there is no one-click Mailchimp or Klaviyo list cleaning.
- The vendor's own updates acknowledge that provider-side security changes, notably at Yahoo, can degrade verification accuracy until a workaround ships, which is honest but is also a real operational risk.
- The 99 percent accuracy figure is a vendor claim with no published methodology or third-party audit behind it.

## Comparisons

- **Verifalia vs Kickbox**: Both are long-established, both classify four ways, and neither resolves catch-alls. Kickbox costs several times more per verification, refunds credits on unknowns, and brings a Ziff Davis parent plus roughly thirty native ESP connectors. Verifalia brings quality levels, forty status codes, six SDKs, retention controls, and a free plan that never ends. Kickbox is the marketer's choice and the procurement-safe choice; Verifalia is the engineer's choice and much cheaper.
- **Verifalia vs MailboxValidator**: Two small, long-lived, developer-oriented verifiers with strong API stories. MailboxValidator is a Malaysian company running since 2013, with a flat published price table and separate bulk and API plans, but it warns it cannot validate Yahoo addresses at all and its bulk credits expire after 30 days. Verifalia is older, offers quality levels and non-expiring packs, and actively chases Yahoo's changes rather than declining the domain. Verifalia is the stronger product; MailboxValidator is easier to price at a glance.
- **Verifalia vs Truelist**: Truelist is cheaper per standard credit and does the one thing Verifalia will not: resolve accept-all addresses through a three-credit enhanced pass. Verifalia counters with twenty years of history, forty status codes, granular retention, multi-tenancy, and six SDKs against Truelist's two years and founder-scale team. If catch-alls dominate your list, take Truelist. If control, longevity, and diagnostic depth matter more, take Verifalia.
- **Verifalia vs Bouncer**: The two European options, and they overlap heavily. Bouncer leans on guarantees: 100 percent accuracy on undeliverables, unknowns capped near 2 percent, and a refund on any deliverable that bounces within 72 hours, with EU data residency. Verifalia leans on configurability, giving you the retry dial and the retention dial instead of a promise. Buy Bouncer for the contractual comfort, Verifalia for the control.
- **Verifalia vs Emailable**: Emailable is the slicker, more marketing-friendly product with a cleaner dashboard, ESP integrations, and an explicit policy of not charging for unknown results. Verifalia is deeper technically and cheaper on a well-used plan, with SDKs, retention controls, and sub-user isolation Emailable does not match. Choose Emailable if a marketing team owns the tool; choose Verifalia if a developer does.

## Implementation

- Setup time: Minutes for a manual list clean through the client area. An API integration is a short job given the published SDKs, and the embeddable widget requires no code at all, which makes it the fastest path for protecting marketing forms.
- Learning curve: Moderate, and the highest of any verifier profiled here. The four-way classification is standard, but quality levels, forty status codes, custom classification schemes, override rules, and per-request retention settings are all genuinely new concepts. That depth is the product; expect to spend an hour reading before you configure anything beyond defaults.
- Onboarding: Entirely self-serve on every tier including Ultimate. There is no sales gate anywhere, support is free on all plans including the free one, and live chat is offered from the site.
- Migration: Nothing to migrate technically. The transition work is conceptual: map your incumbent's result vocabulary onto Verifalia's forty status codes and decide, through the custom classification scheme, which of those codes your business treats as mailable. Do that once and the reports become far more useful than a competitor's. If you are moving from a verifier that resolved catch-alls, expect your risky bucket to grow, because Verifalia will hand those addresses back unresolved.

## Platform, API & security

- Platforms: Web client area, REST API, SDKs for .NET, Go, Java, JavaScript, PHP, and Ruby, Embeddable JavaScript form widget
- API: Real-time REST API for single and bulk verification with per-request control over quality level, waiting timeout, deduplication, data retention, and callbacks. Standard quality returns in roughly five seconds, High in around fifty, and Extreme in about two minutes. Bulk inputs accept text, CSV, TSV, XLS, and XLSX files up to 100MB, roughly 72 million addresses. Throughput is prioritised by plan tier, and per-user firewall and throttling rules are available rather than a single published global rate limit.
- Compliance: GDPR (EU-based controller and processor), TLS 1.3 in transit, TOTP multi-factor authentication, Configurable data retention from 5 minutes to 30 days
- Data residency: Operated from Italy by Cobisi Research; the vendor does not advertise a customer-selectable region, but the counterparty and infrastructure are European.
- SSO: Not advertised; multi-user access is handled through sub-users with individual permissions and optional mutual TLS client certificates.
- Security notes: Verification runs live against the target mail exchanger without delivering a message. Account security includes TLS 1.3, TOTP two-factor authentication, per-user firewall and throttling rules, and client certificates for mutual TLS. The retention control, settable as low as five minutes, is the single most useful privacy feature here and is unusually granular for the price. No third-party audit report such as SOC 2 or ISO 27001 is published.

## Support

- Channels: Live chat, Email and contact form, Free support on every plan including Free
- Documentation: Help centre with technical and non-technical articles, a developers documentation site covering the API and every SDK, and a public blog carrying terms-of-service and policy changes.
- Community: No user forum. The company posts operational updates and incident notes publicly, including provider-side breakages and their resolutions.

## Company

- Founded: 2005
- Headquarters: Vigonza, Italy
- Ownership: Privately held and self-funded; Verifalia is operated by Cobisi Research
- Employees: Not disclosed
- Funding: No outside funding; the company describes itself as privately held and self-funded.

Timeline:

- 2005: Cobisi Research is established in March in Vigonza, Italy, as a software development tools company, and begins offering email verification under the Verifalia name.
- 2015: Builds out the developer surface with open-source SDKs across multiple language ecosystems and a real-time API supporting both single and bulk verification.
- 2020: Introduces configurable quality levels, letting callers trade credits for additional verification passes on addresses that a single attempt cannot resolve.
- 2024: Ships the embeddable form widget with Cloudflare Turnstile, reCAPTCHA, and hCaptcha support, and extends account controls with sub-users, throttling, and mutual TLS client certificates.
- 2026: Serves more than 100,000 customers, publishes updates for Yahoo's changed security algorithms, releases version 5.1 of the .NET SDK with .NET 10 support, and revises Terms of Service to sustain the free plan.

## Integrations

REST API, Open-source SDKs for .NET, Go, Java, JavaScript (Node.js and browser), PHP, and Ruby, Embeddable JavaScript verification widget, HubSpot forms, Adobe Marketo Engage forms, Unbounce, Leadpages, Instapage, and KickoffLabs, FormStack, FormSite, and native HTML5 form validation, jQuery Validation, Parsley, Validate.js, and Kendo UI, Cloudflare Turnstile, Google reCAPTCHA, and hCaptcha, Callbacks and webhooks

## FAQ

### What is Verifalia?

Verifalia is an email verification and list cleaning service operated by Cobisi Research in Italy since 2005. It classifies addresses as Deliverable, Undeliverable, Risky, or Unknown, attaches one of more than forty status codes explaining why, and lets you choose per verification how hard to try through three quality levels costing one, two, or four credits. It is sold as subscription plans with daily free credits plus non-expiring credit packs.

### How much does Verifalia cost?

Plans are $0 for Free with 25 credits a day, $9 for Starter with 250 a day, $49 for Professional with 1,250, $199 for Enterprise with 6,250, and $499 for Ultimate with 25,000, with 5 percent off quarterly and 10 percent off annual billing. Fully used, those work out to roughly $0.0012, $0.0013, $0.00106, and $0.00067 per credit respectively. Separately, non-expiring credit packs from 500 to ten million run from around $0.0079 per credit at the smallest size to about $0.00049 at the largest, priced in more than twenty currencies.

### What are Verifalia's quality levels and when should I use them?

Standard makes one pass in about five seconds for one credit and is right for most addresses. High makes three passes over roughly fifty seconds for two credits. Extreme makes nine passes over about two minutes for four credits. The extra passes exist to work through temporary conditions such as greylisting, throttled providers, or a mailbox over quota. The efficient pattern is to run everything at Standard and re-run only the unknown residue at High or Extreme.

### How does Verifalia handle catch-all and accept-all addresses?

It detects accept-all servers and classifies those addresses as Risky, and it does not attempt to determine which mailboxes actually exist behind them. Higher quality levels will not change this, because the issue is a server designed to accept everything rather than a temporary failure. If resolving that bucket is your main problem, Truelist, Scrubby, and BounceBan all attack it directly and Verifalia does not.

### Do Verifalia credits expire?

It depends which credits. The free credits included with each plan are granted daily and expire at midnight UTC if unused, so they do not accumulate. Credits bought as packs never expire and stay available indefinitely. The service always consumes the daily free allowance first before touching purchased packs, which means a steady daily workload is much cheaper than an occasional large one on the same plan.

### Does Verifalia charge for unknown results?

Verifalia does not publish a policy of refunding credits for unknown results, unlike Kickbox, MillionVerifier, Reoon, Bouncer, and Emailable. Its structural answer to the problem is different: rather than refunding you for a non-answer, it sells you the ability to buy more attempts through High and Extreme quality levels. Whether that is better depends on whether extra passes actually resolve your particular unknowns, which the free plan lets you test at no cost.

### Does Verifalia detect role accounts, disposable addresses, and spam traps?

Role accounts such as info@ and sales@, disposable and throwaway providers, and free providers such as Gmail and Yahoo are all explicitly detected and flagged, alongside catch-all servers and likely typos with machine learning suggested corrections. Risky classifications cover spam-trap-like addresses, and the forty-plus status codes tell you which specific condition produced the classification rather than lumping them together.

### How does Verifalia handle data retention and GDPR?

Better than anyone else in this set. Data retention is configurable from five minutes to thirty days, and can be set per individual verification through the API rather than only as an account default. The controller and processor are Italian, so an EU buyer has a counterparty inside the bloc. Account security includes TLS 1.3, TOTP two-factor authentication, per-user firewall and throttling rules, and mutual TLS client certificates. There is no published SOC 2 or ISO 27001 report.

### Can Verifalia verify addresses on my signup forms?

Yes, two ways. Developers can call the real-time API directly using the open-source SDKs for .NET, Go, Java, JavaScript, PHP, or Ruby. Non-developers can drop in the embeddable JavaScript widget, which works with native HTML5 form validation and with HubSpot, Marketo, Unbounce, Leadpages, Instapage, FormStack, FormSite, and common validation libraries, and supports Cloudflare Turnstile, reCAPTCHA, and hCaptcha so bots cannot burn your credits.

### Who is behind Verifalia and how stable is it?

Verifalia is run by Cobisi Research, established in March 2005 and headquartered in Vigonza, Italy. The company is privately held and self-funded with no outside investors, claims more than 100,000 customers with roughly 30 percent from Fortune and Global 500 organisations, and has been operating the service continuously for two decades. In a category where most vendors are under five years old and several publish nothing about themselves, that is the strongest stability story available.

## Editorial verdict

Verifalia is the verifier for people who want to configure something rather than click a button. The quality-level dial is the best idea in the category that nobody else has copied: instead of accepting an unknown or paying a flat premium, you spend two or four credits only on the addresses a single pass could not settle. Around that sit forty status codes, a redefinable classification scheme, retention settable to five minutes, sub-users with certificates and throttling, six open-source SDKs, and a bot-protected form widget, all from a self-funded Italian company that has been trading since 2005 and posts publicly when a provider breaks its verification. It is also cheap, at roughly a tenth of Kickbox per address on a well-used plan. Two caveats decide whether it fits. It will not resolve catch-all domains, so B2B outbound teams whose value sits in that bucket should look elsewhere. And the daily-credit plan structure suits a steady flow rather than a one-off clean, for which you should buy a pack instead. For a developer-led team that wants control and longevity, this is the strongest all-round choice here.

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Source: SaaSTracker (https://saastracker.org), an independent editorial project. This profile is compiled from public information, carries no peer reviews or paid placement, and was last reviewed 2026-08-22. Awards are judged on published criteria: https://saastracker.org/methodology