BounceBan

Name: BounceBan
Brand: BounceBan
Price: 341000040 USD

The verifier that refuses to give up on catch-all addresses

BounceBan is an email verification service built around the one result every other verifier surrenders on: the catch-all (accept-all) address. Instead of labelling every address on an accept-all domain as risky, it applies proprietary signal-based algorithms to resolve the true deliverability of what it says is 85 to 95 percent of catch-all, greylisted, and Secure Email Gateway protected addresses, at a claimed accuracy above 97 percent, without sending a real message. It sells credits pay-as-you-go from $0.005 down to $0.0013 each, offers unlimited free single verifications, and connects through an API, Google Sheets, Clay, n8n, and a daily CRM sync.

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Overview

Every B2B list runs into the same wall. Somewhere between a quarter and a half of business domains are configured to accept mail for any address, so the SMTP conversation that a verifier relies on returns a positive answer whether or not the mailbox exists. The honest response is to mark the address unknown, and that is what most of the category does. The consequence is that a large slice of a hard-won prospect list ends up in a bucket you are told not to mail, which either gets deleted or gets mailed anyway with a prayer.

BounceBan exists to shrink that bucket. It does not send probe messages, which would be both intrusive and a GDPR problem, and it does not simply guess. It combines a wider set of signals than a plain SMTP handshake, reads the behaviour of the receiving infrastructure, and returns a deliverable or undeliverable verdict for the majority of catch-all addresses. The vendor claims coverage of over 90 percent of catch-alls with accuracy above 97 percent, specifically including Microsoft 365, Google Workspace, and mail fronted by Mimecast, Proofpoint, and Barracuda gateways, and it publishes a guaranteed delivery rate of up to 99 percent for addresses it marks deliverable.

Commercially it is set up for outbound teams rather than newsletter operators. Single verifications are free forever with no cap, which is an unusually generous evaluation path and doubles as a lead magnet. Paid credits start at a 10,000 minimum and never expire, unused balances roll over, and a monthly subscription takes 15 percent off the pay-as-you-go rate. A separate Sync product verifies the contacts sitting in your CRM every day and acts on the result, which is the part that turns verification from a pre-send chore into standing hygiene.

The company itself is thin on public facts. It launched in 2023, and beyond that there is no published headquarters, headcount, funding history, or named leadership team, and the customer-count claim of more than 50,000 is the vendor's own. That opacity is worth pricing in: you are buying a technically distinctive service from an organisation that tells you almost nothing about itself, and the honest way to evaluate it is to run your own control list, which the free single verifier makes trivially cheap to do.

Best for

Cold outbound teams, lead-generation agencies, and Clay or n8n operators working B2B lists where a large share of domains are catch-all or sit behind a Secure Email Gateway, and where deleting the risky bucket means throwing away real pipeline.

Not the right fit for

Consumer newsletter operators whose lists are mostly Gmail, Yahoo, and Outlook.com; ordinary mailbox checks resolve those cleanly and you would be paying a premium for a problem you do not have.
Buyers who require a named vendor with published leadership, funding, and audited SOC 2 or ISO certification before signing; BounceBan publishes a GDPR and CCPA statement and nothing else.
Anyone who wants a full deliverability suite: there is no inbox placement testing, no blacklist monitoring, no DMARC reporting, and no warmup, so this sits alongside those tools rather than replacing them.
Teams verifying under a few thousand addresses a year, since the smallest paid package is 10,000 credits and the free tier only covers one-at-a-time checks.
Organisations that treat any inference about a mailbox they cannot directly confirm as unacceptable risk; BounceBan's whole value is a probabilistic verdict where competitors return unknown.

How it works

1
You paste an address into the free single verifier or upload a list, and BounceBan first runs the ordinary layers: syntax, domain and MX resolution, disposable and role-account detection, and a standard mailbox-level check for domains that answer honestly.
2
For domains that accept everything, the interesting path begins. Rather than sending a message, BounceBan applies proprietary algorithms across a wider set of signals to infer whether the specific mailbox exists behind the accept-all wall, including the behaviours characteristic of Microsoft 365, Google Workspace, and the major Secure Email Gateways. Most addresses resolve in seconds; the vendor says a minority take one to six minutes.
3
Results come back as deliverable, undeliverable, or (for the residue it cannot resolve) risky, and exports carry an estimated overall delivery rate for the mixed set so you can decide what to send and what to hold. One credit is charged per successful verification through single premium, bulk, or API; free-mode single checks cost nothing.
4
For ongoing hygiene, the Sync product connects to a CRM such as HubSpot, re-verifies the contact base daily, and takes a configured action on failures: unsubscribe, remove from a list, or remove from the CRM. Sync is billed separately by the number of unique emails verified in a month and moves you up or down tiers automatically.

Feature breakdown

25 features in 5 modules

Catch-all and gateway resolution

The reason the product exists, and the only part of it that is genuinely hard to copy.

Catch-all deliverability verdicts: Proprietary algorithms return a real deliverable or undeliverable answer for what the vendor states is over 90 percent of catch-all addresses, at a claimed accuracy above 97 percent.
Secure Email Gateway coverage: Explicitly handles mail fronted by Mimecast, Proofpoint, and Barracuda Networks, which normally defeat a plain SMTP probe and are common in mid-market and enterprise targets.
Microsoft 365 and Google Workspace handling: The two providers behind most B2B mailboxes are called out as first-class cases rather than best-effort, which matters because both have tightened their responses to verification traffic.
Greylisting tolerance: Addresses on greylisting servers, which defer a first connection and confuse single-pass verifiers, are covered in the same 85 to 95 percent resolution claim.
No probe messages sent: Verification never sends an actual email, which is both the GDPR-safe posture and the reason it does not burn your sending domain or annoy the recipient.
Estimated overall delivery rate on export: When you export a mixed set of verified addresses, BounceBan attaches an expected delivery rate so you can model the bounce risk of a segment before you load it into a sequencer.

Verification surfaces

One credit ledger across four ways of asking the same question.

Unlimited free single verification: One-address checks in free mode are unlimited and cost no credits, forever. It is the cleanest evaluation path in the category and the fastest way to sanity-check a competitor's unknowns.
Bulk list verification: Upload a list and verify the whole file, with concurrent processing so thousands of addresses run in parallel rather than serially.
Single premium verification: The credit-charged single check, which is the one that runs the full catch-all resolution path rather than the free-mode subset.
Real-time API: API credentials are self-issued from the dashboard, so a form-level or enrichment-time check can be wired up without a sales conversation.
Concurrent processing: The vendor states the system supports thousands of simultaneous verifications; most addresses return in seconds, with a minority taking one to six minutes.

CRM sync and automation

Verification as standing hygiene rather than a pre-send ritual.

Daily CRM re-verification: Sync connects to a supported CRM, HubSpot first among them, and re-checks every contact daily rather than only when you remember to export a list.
Automatic action on failures: Failed addresses can be unsubscribed, removed from a list, or removed from the CRM entirely, so the database self-cleans without a human in the loop.
Usage-tiered Sync billing: Sync is a separate subscription charged on unique emails verified in a month, and it upgrades or downgrades to the nearest tier automatically as your base grows or shrinks.
Clay and n8n connectors: Native presence in the two tools where modern list-building actually happens, so verification becomes a column or a node instead of a CSV round trip.
Google Sheets integration: Verify directly against a spreadsheet, which is how a great many small teams still manage lists regardless of what their stack diagram claims.
Generic HTTP request connector: A documented plain HTTP path for automation platforms with no native connector, which keeps the integration story open-ended.

AI and assistant surface

An unusually early bet on verification being called by agents rather than people.

Claude Code plugin: A published plugin lets an AI coding assistant call verification directly, which is a strange feature on paper and a useful one if your enrichment pipeline is written by an agent.
ChatGPT GPT integration: A published GPT wraps the verifier so it can be invoked conversationally inside ChatGPT.
Portable AI skill definitions: BounceBan publishes skill definitions for AI assistants and for OpenClaw, so agent frameworks can pick up verification without bespoke glue code.

Commercial and compliance terms

Credit economics that favour buying in bulk and keeping the balance.

Credits never expire: Unused credits roll over to the next period indefinitely, which removes the use-it-or-lose-it pressure that ruins the maths on annual verifier contracts.
Volume ladder to $0.0013: Pay-as-you-go runs from $0.005 per credit under 10,000 down to $0.0017 at one million and $0.0013 above 2.5 million.
Fifteen percent subscription discount: Choosing the monthly subscription instead of a one-off purchase takes 15 percent off every tier, so the million-credit rate falls to $0.00145.
Delivery-rate guarantee: The vendor publishes a guaranteed delivery rate of up to 99 percent for addresses returned as deliverable, though the guarantee's remedy terms are not spelled out on the pricing page.
GDPR and CCPA posture: Verification is non-intrusive because no message is sent, and the vendor states it follows GDPR and CCPA in handling business data. No SOC 2 or ISO certification is advertised.

Use cases

4 documented

Cold outbound agency running lists for multiple clients

A 60,000-row B2B list comes back from a conventional verifier with 22,000 rows marked risky because the domains are accept-all, and the client will not accept either deleting them or mailing them blind.

BounceBan resolves the large majority of that bucket into deliverable and undeliverable, the mailable set grows substantially, and the reported bounce rate stays in the range agency users describe publicly, often falling from around 8 percent to under 2 percent.

Clay operator building an enrichment waterfall

Found addresses need a deliverability gate before they enter a sequencer, and the existing verifier column returns unknown often enough that the waterfall stalls.

BounceBan runs as a Clay step with a per-credit cost of $0.003 at 100,000 volume, resolving most unknowns in place so the table produces a clean send-ready segment without an export and re-import cycle.

RevOps lead with a decaying HubSpot database

Contacts collected over three years now bounce at a rate that is starting to affect the sending domain, and nobody owns the job of cleaning them.

Sync re-verifies the CRM daily and automatically unsubscribes or removes failing contacts, so hygiene becomes a background process billed on unique emails touched rather than a quarterly project.

Founder evaluating verifiers before committing budget

Three vendors all claim high accuracy, and the only way to tell them apart is on the addresses that are actually hard.

The unlimited free single verifier lets the founder take twenty known-good and twenty known-dead catch-all addresses and check every vendor's verdict by hand before spending a dollar.

Pricing

from $34 for 10,000 credits on subscription ($40 pay-as-you-go), with unlimited free single verifications

Prepaid credits on a volume ladder, sold pay-as-you-go or as a monthly subscription at 15 percent off, plus a separately billed Sync subscription charged on unique emails verified per month.

Plan	Price	Includes
Free single verification	$0 unlimited	Unlimited one-at-a-time address checks No credit card and no credit consumption Useful as a manual spot-check against other vendors Bulk, API, and Sync are not included The free mode is a subset of the premium single check, so treat its verdicts as indicative rather than identical.
Credits (pay-as-you-go)	$0.005 to $0.0013 per credit, by volume	10,000 credits at $0.004 each, so $40 100,000 credits at $0.003 each, so $300 1,000,000 credits at $0.0017 each, so $1,700 Above 2.5 million, $0.0013 per credit Credits never expire and roll over 10,000 credits is the smallest package on the pricing calculator; custom pricing above one million.
Credits (monthly subscription)	$0.00425 to $0.00111 per credit, 15 percent off every tier	10,000 credits at $0.0034 each, so $34 100,000 credits at $0.00255 each, so $255 1,000,000 credits at $0.00145 each, so $1,450 Unused monthly quota rolls over rather than lapsing The rollover rule is what makes the subscription safe: you are not gambling on hitting your volume every month.
Sync	Tiered by unique emails verified per month monthly subscription	Daily re-verification of CRM contacts Automatic unsubscribe or removal on failure Automatic tier upgrades and downgrades Billed separately from the credit balance The Sync price ladder is not published as a static table on the pricing page.

Billing notes

One credit is charged per successful verification through single premium, bulk, or API. Free-mode single checks never consume credits.
The vendor does not publish a policy of refunding credits for unresolved or risky results, which several competitors do explicitly; assume you pay for the attempt.
Sync is a separate line item from credits, so a team using both is running two meters.
Volume above one million credits is quoted by contacting the company, but everything at or below that is purchasable self-serve from the pricing page.
At the three reference volumes, subscription pricing works out to $34 at 10,000, $255 at 100,000, and $1,450 at 1,000,000, which puts BounceBan mid-market: well above MillionVerifier and Reoon, well below ZeroBounce and NeverBounce.

Value assessment: Judge BounceBan on the price of a resolved catch-all, not the price of a credit. At $0.003 per credit for 100,000 addresses it costs roughly twice MillionVerifier and about a fifth of NeverBounce, and if it converts a meaningful share of a risky bucket into mailable pipeline the arithmetic is not close. On a list that is 30 percent accept-all, resolving most of that segment is worth far more than the few hundred dollars of price difference against a budget verifier. The inverse is also true: on a consumer list with few catch-alls you are paying a premium for a capability you will never invoke, and one of the cheap bulk verifiers will do the same job for a third of the money.

Strengths & limitations

Strengths

The catch-all resolution is the real thing and it is the hardest problem in the category; competitors that describe themselves as handling catch-alls generally mean they label them accurately, not that they resolve them.
Explicit coverage of Secure Email Gateways and of Microsoft 365 and Google Workspace, which is exactly where B2B lists concentrate and exactly where naive SMTP probing has stopped working.
Unlimited free single verification with no cap is the most honest evaluation offer in the category and lets you audit the accuracy claim yourself in ten minutes.
Credits never expire and roll over, so unused balance is not a stranded asset, and the 15 percent subscription discount is applied to the whole ladder rather than a headline tier.
No probe messages are ever sent, which keeps the method defensible under GDPR and avoids any risk of your prospects seeing verification traffic.
The integration surface is aimed at where modern list work happens: Clay, n8n, Google Sheets, a plain HTTP connector, and an unusually early set of AI assistant skills.
Daily CRM Sync with automatic remediation turns verification from a periodic project into standing infrastructure.

Limitations

The company publishes essentially nothing about itself: no founding year, no headcount, no named leadership, no funding, no registered address on the site. For some buyers that alone is disqualifying.
No SOC 2, ISO 27001, or HIPAA attestation is advertised. The compliance story stops at a GDPR and CCPA statement, which is thin next to ZeroBounce or Bouncer.
There is no deliverability suite around the verifier: no inbox placement tests, no blacklist monitoring, no DMARC reporting, no warmup.
Accuracy claims of 97 percent and coverage claims of 85 to 95 percent are vendor-reported with no published methodology or third-party audit behind them.
The credit policy on unresolved results is not published, unlike MillionVerifier, Reoon, Bouncer, and Emailable, all of which explicitly do not charge for unknowns.
The smallest paid package is 10,000 credits, so there is no cheap way to run a genuine bulk test of a few hundred addresses.
Sync pricing is not published as a table, which breaks the otherwise transparent pricing story and means you cannot fully model the cost before signing up.

Head-to-head comparisons

4 alternatives

BounceBan vs MillionVerifier

from $39 for 10,000 credits, or $0.0039 per email

MillionVerifier is roughly half the price per credit and claims to resolve 30 to 40 percent of catch-alls at no extra cost, plus it does not charge for risky results at all. BounceBan claims to resolve 85 to 95 percent. If your list is mostly consumer domains or your catch-all share is small, MillionVerifier wins on economics without much sacrifice. If your list is B2B and the accept-all bucket is a third of it, BounceBan's higher resolution rate is worth the premium, and the free single verifier lets you test that claim before buying.

Full BounceBan vs MillionVerifier comparison

BounceBan vs ZeroBounce

from $0 for 100 credits a month, then $39 for 2,000 pay-as-you-go credits or $99 a month for ZeroBounce ONE

ZeroBounce is the certified, full-suite option: SOC 2 Type 2, ISO 27001, HIPAA, its own data centres, EU or US API routing, plus warmup, inbox placement, and DMARC monitoring. It is also several times the price per credit and treats catch-alls conventionally. Buy ZeroBounce when procurement and the wider deliverability toolkit are the deciding factors; buy BounceBan when the only question is how much of your risky bucket you can safely mail.

Full BounceBan vs ZeroBounce comparison

BounceBan vs Reoon Email Verifier

from $0 for 600 verifications a month, then $11.90 for 10,000 instant credits or $9 a month for 500 credits a day

Reoon is the cheapest credible verifier here, at $0.00119 per credit for 10,000, and it refunds credits for unknown results. It handles catch-alls but does not claim BounceBan's resolution rate. Reoon is the right default for high-volume list hygiene on a budget; BounceBan is the specialist you bring in when the catch-all segment is where your revenue actually lives.

Full BounceBan vs Reoon Email Verifier comparison

BounceBan vs Bouncer

from $8 for 1,000 credits, with 100 free credits on signup

Bouncer takes the opposite philosophical position: it is deliberately biased against false negatives, guarantees 100 percent accuracy on undeliverables, caps unknowns at about 2 percent, and refunds any deliverable that bounces within 72 hours. BounceBan pushes harder into ambiguity to recover more addresses. Pick Bouncer if a wrongly discarded contact is the expensive mistake and EU data residency matters; pick BounceBan if a wrongly discarded catch-all is the expensive mistake.

Full BounceBan vs Bouncer comparison

Implementation & onboarding

Setup time: Under ten minutes for bulk or API use: sign up, buy a credit package, upload a list or copy the API key from the dashboard. The free single verifier needs no account at all for a first look.
Learning curve: Low. The result vocabulary is the standard deliverable, undeliverable, risky triad, and the only genuinely new concept is the estimated overall delivery rate attached to a mixed export.
Onboarding: Entirely self-serve up to one million credits. There is no forced sales call, no demo gate, and no minimum contract. Above one million credits you contact the company for custom pricing.
Migration notes: There is nothing to migrate: verification is stateless and credit balances do not carry between vendors. The sensible transition is to run a few thousand addresses through both your incumbent and BounceBan, compare the risky buckets, and mail a small controlled segment of the newly resolved addresses before trusting the rest. Sync connections to a CRM should be configured in report-only mode first, because the automatic removal actions are destructive by design.

Platform, API & security

Platforms: Web applicationREST APIGoogle SheetsClayn8nHubSpot SyncChatGPT GPTClaude Code plugin
API: REST API with self-issued credentials from the dashboard, covering single and bulk verification. Concurrent processing is supported; most addresses return in seconds and a minority take one to six minutes. Published API reference; no rate limits or SLA figures are advertised on the public site.
Compliance: GDPR (vendor statement)CCPA (vendor statement)
Data residency: Not published.
SSO: Not advertised.
Security notes: Verification never sends an actual message, which the vendor positions as the GDPR-safe alternative to probe-based catch-all testing. No SOC 2, ISO 27001, penetration test summary, trust centre, or data-retention window is published, which is the single largest gap in the product's public posture.

Support & resources

Channels: Support centreContact formEmail
Documentation: Public API reference plus a support centre and an FAQ that covers credits, catch-all methodology, Sync behaviour, and the delivery-rate guarantee.
Community: No user forum or community programme; there is an affiliate programme and a partner page.

Company

Founded: 2023
Headquarters: Not published
Ownership: Privately held; ownership and funding not disclosed
Employees: Not disclosed
Funding: No funding is disclosed and no investors are named.

Timeline

2023BounceBan appears as a specialist catch-all verifier, positioning against the industry convention of marking every accept-all address as risky.
2024Bulk verification and the REST API are joined by connectors for Google Sheets, Clay, and n8n, aiming squarely at the list-building stack rather than at ESPs.
2025The Sync product launches, re-verifying CRM contacts daily with automatic unsubscribe and removal actions, starting with HubSpot.
2026Publishes AI assistant surfaces including a ChatGPT GPT, a Claude Code plugin, and portable skill definitions, and cites more than 50,000 customers.

Integrations

REST API
Google Sheets
Clay
n8n
HubSpot (via Sync)
Generic HTTP request connector
ChatGPT GPTs
Claude Code plugin
AI assistant skill definitions
OpenClaw skill

Frequently asked questions

10 questions

What is BounceBan?

BounceBan is an email verification service that specialises in catch-all addresses. Where most verifiers mark every address on an accept-all domain as risky, BounceBan uses proprietary algorithms to return a real deliverable or undeliverable verdict for what it says is 85 to 95 percent of catch-all, greylisted, and Secure Email Gateway protected addresses, without sending a test message.

How much does BounceBan cost?

Credits are sold on a volume ladder. Pay-as-you-go runs $0.005 per credit below 10,000, $0.004 from 10,000, $0.003 from 100,000, $0.0017 from one million, and $0.0013 above 2.5 million. A monthly subscription takes 15 percent off every tier. In round numbers that is $40 for 10,000, $300 for 100,000, and $1,700 for a million pay-as-you-go, or $34, $255, and $1,450 on subscription.

How does BounceBan verify catch-all emails without sending mail?

The vendor does not disclose the mechanism beyond calling it proprietary algorithms that read a wider range of signals than a standard SMTP handshake, including the characteristic behaviours of Microsoft 365, Google Workspace, and gateways such as Mimecast, Proofpoint, and Barracuda. It explicitly does not send probe messages, which it argues would breach GDPR and other regulations. It claims coverage of over 90 percent of catch-alls at accuracy above 97 percent.

Is there a free plan?

Yes, and it is unusually generous in one narrow way: single email verifications in free mode are unlimited and free forever, with no credit consumption. Bulk verification, the API, and the Sync product all require paid credits, and the smallest package is 10,000 credits.

Do BounceBan credits expire?

No. Unused credits roll over to the next period and do not expire, on both the pay-as-you-go and subscription paths. For the Sync subscription, tiers adjust upward or downward automatically based on the number of unique emails verified in a month.

What bounce-rate guarantee does BounceBan offer?

The vendor publishes a guaranteed delivery rate of up to 99 percent for addresses marked deliverable, and attaches an estimated overall delivery rate to exports containing a mix of result types. The remedy terms behind that guarantee, such as whether you receive credits or a refund, are not published on the pricing page, unlike DeBounce and MillionVerifier which spell theirs out.

Is BounceBan GDPR compliant?

The vendor states it follows GDPR and CCPA in handling business data, and its central compliance argument is that verification is non-intrusive because no message is ever sent to the address being checked. There is no published SOC 2 report, ISO 27001 certificate, data residency commitment, or retention window, so buyers with formal vendor-security processes should expect to ask questions the website does not answer.

Can BounceBan keep my CRM clean automatically?

Yes, through the separately billed Sync product. It connects to a supported CRM such as HubSpot, re-verifies contacts daily, and then unsubscribes, removes from a list, or deletes from the CRM based on the result. Because those actions are destructive, configure and observe it before letting it act.

Who should not use BounceBan?

Anyone verifying mostly consumer addresses at Gmail, Yahoo, or Outlook.com, where ordinary verification already resolves cleanly and a cheaper bulk vendor does the same job. Also anyone who needs a full deliverability suite with inbox placement testing and blacklist monitoring, or who requires audited security certifications from their vendors.

How does BounceBan compare to a cheap bulk verifier?

On price per credit it loses to MillionVerifier, Reoon, and DeBounce by a factor of two to three. On resolved catch-alls it claims a much higher recovery rate than any of them. The decision reduces to what share of your list is accept-all and what a recovered contact is worth. Use the free single verifier on a sample of known-good and known-dead catch-all addresses to settle it empirically rather than by argument.

Editorial verdict

BounceBan is a specialist, and it should be bought as one. Its claim to resolve 85 to 95 percent of catch-all, greylisted, and gateway-protected addresses is the most aggressive in the category, and if it holds on your data it converts a segment other vendors tell you to delete into mailable pipeline, which no amount of per-credit savings elsewhere can match. Against that, the company tells you almost nothing about itself, carries no audited certifications, publishes no credit-refund policy for unresolved results, and offers none of the surrounding deliverability tooling. The saving grace is that the unlimited free single verifier makes the central claim testable in an afternoon. For a B2B outbound team whose list is thick with accept-all domains, run that test; if it holds, BounceBan is worth paying two or three times the budget-verifier rate. For everyone else, it is the wrong tool at the wrong price.

Written by the SaaSTracker editorial team. Awards, when shown, are judged against the published criteria in our methodology.

Awards & badges

1 held

BounceBan holds 1 award from the SaaSTracker editorial program. Badges may be displayed by the vendor; each embed links back to this profile.

Momentum · Email Verification

“Refusing to give up on catch-all addresses made BounceBan the verifier the cold email community reached for this cycle.”

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