MailboxValidator vs MyEmailVerifier
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 assessedMailboxValidator compared with MyEmailVerifier
MyEmailVerifier beats MailboxValidator on almost every commercial axis: about $99 against $199.95 at 100,000, about $349 against $699.95 at a million, 100 free credits every day rather than 300 a month, credits that never expire, full Yahoo support, and a Deep Catch-All Check. MailboxValidator's counters are eleven SDKs, twenty integrations, published processing times, and thirteen years of trading. Unless the SDK coverage decides it, MyEmailVerifier is the better buy.
MyEmailVerifier compared with MailboxValidator
Both are small, long-lived, developer-first vendors at the cheap end. MailboxValidator publishes a fixed table with no calculator games and has been running from Penang since 2013, but its bulk credits expire after 30 days and it cannot validate Yahoo addresses at all. MyEmailVerifier has non-expiring credits, full provider coverage, daily free credits, and a lower price at every comparable volume. MailboxValidator wins only on the clarity and stability of its published pricing.
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.
Choose MyEmailVerifier if
Price-sensitive high-volume senders, agencies, resellers, and solo operators who want a competent real-time verifier at close to the cheapest credible rate in the market, and who can use 100 free credits a day rather than needing a certified enterprise vendor.
Side by side
13 attributes| Attribute | MailboxValidator | MyEmailVerifier |
|---|---|---|
| Category | Verification | Verification |
| Starting price | $0 for 300 API queries a month or a 100-query bulk trial, then $19.95 for 1,000 bulk queries (free plan available) | $0 with 100 free credits every day, then about $4 for 1,000 pay-as-you-go credits (free plan available) |
| Pricing model | 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. | Two published ladders driven by a volume calculator: prepaid pay-as-you-go credits from a 1,000 minimum, and a monthly subscription from a 5,000 minimum priced lower per credit at every tier. Credits never expire on either. A daily-billed unlimited plan sits alongside both. |
| Free plan | API-FREE gives 300 queries a month indefinitely with standard support. An invitation-only API-FREE+ plan doubles that to 600. | 100 free verification credits every day, no credit card required, covering the full verification result set. |
| Free trial | A free bulk trial plan with 100 queries, plus a permanently free API plan with 300 queries per month | No time-limited trial; 100 free credits per day forever on verified accounts |
| Best for | 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. | Price-sensitive high-volume senders, agencies, resellers, and solo operators who want a competent real-time verifier at close to the cheapest credible rate in the market, and who can use 100 free credits a day rather than needing a certified enterprise vendor. |
| Setup time | 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. | Minutes. Register, confirm your address to unlock the daily free credits, and either upload a file or take an API key. The bulk uploader shows a ten-address sample result before you commit a full list, which is a small but genuinely useful touch. |
| Learning curve | 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. | Very low for the core verifier. The result vocabulary is standard, with catch-all, greylisted, and spam trap surfaced as distinct states rather than hidden. The Deep Catch-All Check and the MCP connector are the only parts that require reading anything. |
| Platforms | 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 | Web application, REST API with GitHub client libraries, Claude MCP connector, Chrome extension, Bulk CSV and TXT upload |
| Compliance | No certifications published, No message sent to recipients during validation, Uploaded lists stated never to be shared | GDPR compliant (vendor statement), SOC 2 certified (vendor claim, no report published), No stored verification results (vendor statement) |
| Founded | 2013 | 2018 |
| Headquarters | Bayan Baru, Penang, Malaysia | New Jersey, United States |
| Ownership | Privately held and independently operated | Privately held; ownership and leadership not published |
Strengths and limitations
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.
MyEmailVerifier
Strengths
- The cheapest credible ladder here, at about $99 per 100,000 addresses pay-as-you-go and about $299 for a million on subscription.
- One hundred free credits every day rather than once, which is roughly 36,500 free verifications a year and makes extended, honest evaluation free.
- Real-time SMTP verification with an explicit policy of never storing results, so answers reflect current mailbox status rather than a cached record.
- A Deep Catch-All Check that attempts accept-all resolution, which is rare at this price point and is the difference between a budget verifier and a useful one for B2B lists.
Limitations
- The SOC 2 certification claim is displayed as a badge with no published report, auditor, date, or trust centre behind it, which is not enough for a formal vendor security review.
- The single-email API is rate limited to 30 verifications per minute, which rules out real-time enrichment pipelines and any high-throughput programmatic use.
- Bulk files are capped at 100,000 addresses and 10MB, so larger lists must be split, where competitors accept files an order of magnitude bigger.
- No meaningful ESP integration story; there is no equivalent to Kickbox's roughly thirty native connectors or Mailfloss's forty platform integrations.
Pricing compared
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.
MyEmailVerifier
Two published ladders driven by a volume calculator: prepaid pay-as-you-go credits from a 1,000 minimum, and a monthly subscription from a 5,000 minimum priced lower per credit at every tier. Credits never expire on either. A daily-billed unlimited plan sits alongside both.
- Free daily credits$0
- Pay as you go$0.004 to $0.000349
- Monthly subscription$0.003 to $0.000299
- Unlimited planBilled daily
On raw price per verified address, MyEmailVerifier is the strongest value in this profile set, and it is not close. Ninety-nine dollars for 100,000 addresses against Kickbox's $500 and EmailListVerify's $186 is a different order of spending, and 100 free credits a day means a small sender may never pay at all. The real-time, uncached SMTP model is also a genuine technical position rather than a discount shortcut, and the Deep Catch-All Check means it is not simply abandoning the hard cases the way most cheap verifiers do. What you give up is credibility infrastructure: no published audit report behind the SOC 2 claim, no named leadership, no trust centre, no ESP integration depth, and a marketing style built on countdown offers. If your buying process can tolerate that, the arithmetic is overwhelming. If it cannot, no price makes the difference up.
Editorial verdict on each
MailboxValidator
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 profileMyEmailVerifier
MyEmailVerifier is the price leader in this category and it earns the position with more than discounting. Real-time uncached SMTP checks, a stated policy of never storing results, a Deep Catch-All Check that most budget verifiers do not attempt, non-expiring credits from a 1,000-credit minimum, an MCP connector, and a documented white-label reseller programme add up to a serious product at roughly a fifth of what the establishment charges. The 100 free credits every day are the single best evaluation offer here, because they let you test the thing that actually matters over a week rather than over a hundred addresses. What holds it back is credibility packaging rather than capability: a SOC 2 badge with no report behind it, no named leadership, a 30-per-minute API rate limit that will surprise developers, and a pricing page that behaves like a flash-sale site. For an agency, a reseller, a solo operator, or any team whose buying decision is their own, this is the obvious first thing to test. For a company with a formal vendor security process, it will not clear the gate no matter how good the price is.
Read the full MyEmailVerifier profileMailboxValidator profile last reviewed 2026-08-22; MyEmailVerifier last reviewed 2026-08-22. Pricing is compiled from public sources and can change without notice. See our methodology.