EmailListVerify vs MailboxValidator
An independent, review-free comparison compiled by the SaaSTracker editorial team. Both products are profiled in full, and neither can pay for placement here.
The short answer
Both sides assessedEmailListVerify compared with MailboxValidator
MailboxValidator is a similar small, long-lived, developer-friendly vendor, and its bulk table is cheaper at high volume, $199.95 for 100,000 and $699.95 for a million. But its bulk credits expire after 30 days and it cannot validate Yahoo addresses at all, which is a serious functional gap on consumer lists. EmailListVerify's non-expiring credits and complete provider coverage make it the safer default; MailboxValidator wins on the published million-address price.
MailboxValidator compared with EmailListVerify
EmailListVerify is cheaper at 10,000 addresses, $27 against $59.95, while MailboxValidator is cheaper at a million. EmailListVerify has non-expiring credits, full provider coverage, and a large free deliverability toolkit; MailboxValidator has far better SDK coverage, more integrations, and a forever-free API plan. The Yahoo gap and 30-day expiry make EmailListVerify the safer general-purpose choice and MailboxValidator the better technical one.
Choose EmailListVerify if
Small and mid-sized marketing teams cleaning permission-based lists who want a competent, cheap, self-serve verifier with an API, ESP integrations, non-expiring credits, and a bag of free deliverability tools thrown in, and who do not need catch-all resolution or audited certifications.
Choose MailboxValidator if
Developers and small technical teams who want a cheap, long-lived, no-nonsense validation API with SDKs in their own language, a free tier that never ends, and a flat published price table, and whose lists are B2B or non-Yahoo enough that the provider gap does not matter.
Side by side
13 attributes| Attribute | EmailListVerify | MailboxValidator |
|---|---|---|
| Category | Verification | Verification |
| Starting price | $5 for 1,000 verifications pay-as-you-go, with 100 free on signup (free plan available) | $0 for 300 API queries a month or a 100-query bulk trial, then $19.95 for 1,000 bulk queries (free plan available) |
| Pricing model | Two published ladders on the same platform: prepaid pay-as-you-go credits that never expire, and monthly subscriptions roughly 10 percent cheaper per credit that renew each month. One credit per address, API included on every plan. | Two entirely separate products with separate ladders: prepaid bulk plans valid for 30 days with published processing times, and monthly API subscriptions with auto-renewal and auto-recharge including a permanently free tier. No refunds on either. |
| Free plan | 100 free verifications on account creation, no credit card. There is no recurring free allowance. | API-FREE gives 300 queries a month indefinitely with standard support. An invitation-only API-FREE+ plan doubles that to 600. |
| Free trial | No time-limited trial; 100 free verifications on registration | A free bulk trial plan with 100 queries, plus a permanently free API plan with 300 queries per month |
| Best for | Small and mid-sized marketing teams cleaning permission-based lists who want a competent, cheap, self-serve verifier with an API, ESP integrations, non-expiring credits, and a bag of free deliverability tools thrown in, and who do not need catch-all resolution or audited certifications. | Developers and small technical teams who want a cheap, long-lived, no-nonsense validation API with SDKs in their own language, a free tier that never ends, and a flat published price table, and whose lists are B2B or non-Yahoo enough that the provider gap does not matter. |
| Setup time | Minutes. Register, use the 100 free credits on a sample, buy a package, upload a file. An ESP integration is a short OAuth flow. The API takes an hour or two to wire into a signup form and is available on the smallest plan. | Minutes for both paths. The free bulk trial needs only an upload, and the free API plan plus a language SDK gets a working integration inside an afternoon. Roughly twenty integrations are positioned as five-minute connections. |
| Learning curve | Very low. The result vocabulary is standard, the interface is plain, and there are no configurable quality levels or credit multipliers to reason about. The only judgement call is what to do with the catch-all segment, and the vendor's advice, skip it, is at least unambiguous. | Very low technically. The important learning is commercial: understand the 30-day credit expiry, the no-refund policy, and the Yahoo and ASCII limitations before purchase, because all four are the kind of constraint that only hurts after you have paid. |
| Platforms | Web application, REST API, MCP server, Chrome extension, ESP integrations | Web portal for bulk uploads, REST API returning JSON or XML, SDKs for Node.js, Ruby, PHP, Perl, Python, Java, .NET, Go, Rust, Kotlin, and Scala, Platform extensions, Zapier and Make |
| Compliance | GDPR (vendor statement) | No certifications published, No message sent to recipients during validation, Uploaded lists stated never to be shared |
| Founded | 2003 | 2013 |
| Headquarters | Bratislava, Slovakia | Bayan Baru, Penang, Malaysia |
| Ownership | Privately held, operated by CyberPanda | Privately held and independently operated |
Strengths and limitations
EmailListVerify
Strengths
- Roughly a third the price of Kickbox and half the price of ZeroBounce for substantially the same core checks, with two fully published price ladders and no sales gate.
- The API is included on every plan including the smallest package, rather than gated behind an upgrade.
- Pay-as-you-go credits never expire, which suits agencies and project work far better than a subscription with a monthly allowance.
- An unusually broad set of free adjacent tools including inbox placement testing, blacklist checking, DMARC and SPF generation and validation, and an SPF flattening tool that solves a real DNS problem.
Limitations
- No catch-all resolution at all. The vendor detects accept-all domains and explicitly recommends skipping them, which leaves the risky bucket exactly where it was.
- No published policy on whether unknown or catch-all results consume credits, which is a meaningful gap for a vendor competing on price.
- Compliance stops at a GDPR statement. No SOC 2, no ISO 27001, no published data residency, retention window, or security contact.
- The published ladders stop at 100,000 pay-as-you-go and 250,000 per month on subscription, so genuinely high volume is not self-serve.
MailboxValidator
Strengths
- The widest SDK coverage of any verifier here, with maintained modules for Node.js, Ruby, PHP, Perl, Python, Java, .NET, Go, Rust, Kotlin, and Scala.
- A permanently free API plan of 300 queries a month, which is not a trial and makes the service a viable default for a small application.
- One of the cheapest published high-volume rates anywhere, at $199.95 for 100,000 and $699.95 for a million addresses.
- Around twenty named integrations including Zapier, Make, Mailchimp, HubSpot, SendGrid, Mailjet, Intercom, ChatGPT, and an MCP connector, which is a lot of surface for a very small company.
Limitations
- Yahoo addresses cannot be validated at all, which is a serious functional gap on any consumer list and something no competitor profiled here shares.
- Non-ASCII addresses are marked as invalid syntax rather than validated, so internationalised addresses are effectively unsupported.
- Bulk credits expire 30 days after purchase, by far the shortest expiry in the category, and there are no refunds under any circumstances.
- Processing is slow at volume by published admission, up to 72 hours for a million addresses.
Pricing compared
EmailListVerify
Two published ladders on the same platform: prepaid pay-as-you-go credits that never expire, and monthly subscriptions roughly 10 percent cheaper per credit that renew each month. One credit per address, API included on every plan.
- Free credits$0
- Pay as you go$5 to $186
- Monthly subscription$16 to $346
- Higher volumesOn request
EmailListVerify is priced exactly where it should be for what it does. It is not the cheapest, MyEmailVerifier and Reoon both undercut it by roughly half, and it is not the most capable, since it makes no attempt at catch-all resolution and publishes no certifications. What it offers is a well-rounded, competent product at roughly a third of what the establishment vendors charge, with the API included at every tier, non-expiring credits, ESP connectors, and a surprisingly useful pile of free deliverability tools attached. For a small marketing team cleaning a permission-based list, that combination is better value than either the budget floor or the premium ceiling. The unpublished credit policy on unknowns is the one thing that undermines a price-led pitch, and it is worth an email to support before you buy a large package.
MailboxValidator
Two entirely separate products with separate ladders: prepaid bulk plans valid for 30 days with published processing times, and monthly API subscriptions with auto-renewal and auto-recharge including a permanently free tier. No refunds on either.
- Bulk trial$0
- Bulk plans$19.95 to $699.95
- Free API$0
- Paid API plans$29.95 to $339.95
MailboxValidator is excellent value for a developer and questionable value for a marketer. The forever-free 300-query API plan, eleven language SDKs, roughly twenty integrations, and a $0.0007 per-address bulk rate at a million are all genuinely strong for a company of a handful of people trading since 2013. But the terms attached to that price are the harshest in the category: credits expire in 30 days, refunds do not exist, and the service cannot validate Yahoo addresses at all or handle non-ASCII ones. On a B2B list processed promptly, none of those matter and the price is superb. On a consumer list bought ahead of a project that slips, you can lose the whole purchase and still have an unvalidated Yahoo segment. Price this as a cheap, capable tool with sharp edges, and only buy credits you are certain you will spend this month.
Editorial verdict on each
EmailListVerify
EmailListVerify is the competent middle of this category, and there is more merit in that than the description suggests. It runs every check a permission-based marketing list needs, includes the API on the cheapest plan, sells non-expiring credits, connects to the ESPs small senders actually use, and costs about a third of what the establishment vendors charge for the same work. The free tools around it, particularly the inbox placement test, the blacklist checkers, and the SPF flattening utility, give a small team a rough deliverability toolkit they would otherwise buy separately. Two things keep it from being a default recommendation. It will not touch a catch-all domain, so B2B outbound teams should look elsewhere, and it does not publish whether unresolved results cost you a credit, which is a strange gap for a vendor whose entire pitch is price. Buy the $5 thousand-credit package, run a list you already know the answers to, and ask support the credit question. If both check out, this is a sensible, unglamorous purchase.
Read the full EmailListVerify profileMailboxValidator
MailboxValidator is a small, honest, long-lived tool that is very good at a specific job and openly bad at several others. Eleven language SDKs, roughly twenty integrations, a permanently free 300-query API plan, and a $0.0007 per-address bulk rate at a million make it one of the best developer-facing options in the category, and the published processing times and openly documented limitations are more candour than most vendors manage. But the limitations are real and unusual: no Yahoo validation at all, no non-ASCII support, credits that expire in 30 days, no refunds, and no catch-all resolution. Those are not deal-breakers for a B2B list processed promptly by a technical team, and they are close to disqualifying for a consumer newsletter or an occasional buyer. Run the provider census on your own list first. If Yahoo is a rounding error and you will spend the credits this month, this is a bargain with excellent tooling. If not, MyEmailVerifier or EmailListVerify does the same work with none of the sharp edges.
Read the full MailboxValidator profileEmailListVerify profile last reviewed 2026-08-22; MailboxValidator last reviewed 2026-08-22. Pricing is compiled from public sources and can change without notice. See our methodology.