MailboxValidator review (2026): is the free plan enough?
Email validation by bulk list upload or API
Black Friday: is there a MailboxValidator sale?
MailboxValidator report card
Fair · out of 4.0 · graded Nov 13, 2026
Best for email validation by list upload or API
MailboxValidator checks addresses by bulk upload or API, with a free 300 queries a month. Its paid plans start at $29.95 for 3,000 queries, bulk queries lapse after 30 days, and Yahoo validation isn't supported at the moment.
Who MailboxValidator is for
- Fits if you want an API check in a signup form and can start on 300 free queries a month
- Works for one-off list cleaning with a bulk pack
Who MailboxValidator is not for
- Tight if you stay free, as API-FREE is 300 queries a month
- Watch out: bulk queries are valid for 30 days, so unused ones lapse
- Not for you if you need Yahoo addresses checked, as that isn't supported at the moment
- Watch out: bigger bulk packs list support replies of up to 72 hours
Why MailboxValidator gets a 2.2
Five grades, each with its reason. The GPA is their average: an A is 4 points, an F is none.
- CValue for money$29.95 a month for 3,000 queries, or $19.95 for 1,000 bulk queries, around the category's $23 middle for far fewer checks.
- CFree plan and trialAPI-FREE gives 300 queries a month, renewing, which a list will pass. Bulk has 100 free queries valid 30 days.
- CFeaturesBulk cleaning, an API, disposable and role detection and SDKs. But the plans page says Yahoo validation isn't supported at the moment.
- CEase of useNo store rating on record. You upload lists or call the API.
- BPlatforms and integrationsWeb with Mailchimp, SendGrid, AWeber, Mailgun and ActiveCampaign links, plus SDK modules.
What these grades rest on. Graded from this listing, whose facts were read from MailboxValidator's own pages on 13 November 2026. Not based on using the product, and shorter than our full reviews. How we review and grade.
Make MailboxValidator? Put this grade on your site
Paste this where you want the badge. It links here and follows the grade if it changes. About badges
<a href="https://toolgpa.com/tools/mailboxvalidator#review"><img src="https://toolgpa.com/badge/mailboxvalidator.svg" alt="MailboxValidator: 2.2 GPA on ToolGPA" width="196" height="56"></a>Where MailboxValidator stands among email verification and deliverability tools
MailboxValidator's GPA of 2.2 is higher than 23 of the 61 other email verification and deliverability tools we grade, and level with 13.
It stands best on platforms and integrations (B, above 28 of 61) and worst on features (C, above 0).
Its paid plans start at $29.95 a month, against a middle price of $21.50 for the category: 28 of the 43 others that charge start lower.
On features, ease of use and platforms it scores 2.3 out of 4. 7 tools score higher and cost less.
Each grade against the category
Every bar is all 62 email verification and deliverability tools we grade, cut by the letter each got. MailboxValidator’s own letter is outlined.
- CValue for moneyAbove 9 of 61, level with 35
- CFree plan and trialAbove 9 of 61, level with 43
- CFeaturesAbove 0 of 61, level with 45
- CEase of useAbove 2 of 61, level with 50
- BPlatforms and integrationsAbove 28 of 61, level with 33
Price against what you get
Each dot is one of 45 email verification and deliverability tools. Further left costs less, and higher up scores better on features, ease of use and platforms. Point at a dot to see which tool it is.
Features, ease of use and platforms, averaged
What paid plans start at, a month (each step along is roughly double) →
- The best score at each price
- Has a free plan
- No free plan
Keep MailboxValidator, or make your own?
Keep it
Nothing MailboxValidator does is plain enough to make in a weekend. The 2 things listed below take a company.
It costs $359.40 a year.
What you could not
- Checking that an address exists without writing to it.
- It plugs into other products, Mailchimp, SendGrid and AWeber among them, and has an API.
What this rests on. MailboxValidator’s listing: what it does, where it runs, what it plugs into and what it costs. It is a judgement about the kind of software this is. We have not built a replacement for it, and making your own means looking after it too. How we decide, and every tool’s verdict.
What is MailboxValidator?
MailboxValidator checks email addresses for validity, disposable domains and role accounts. Lists can be uploaded for one-time cleaning with a bulk plan, or checked through an API on a monthly subscription. Credits on bulk plans are valid for 30 days, and Yahoo addresses are not supported at present.
Worth knowing
- The plans page says Yahoo email validation is not supported at the moment.
- Bulk plan queries are valid for 30 days, so unused queries lapse.
- Higher-volume bulk packs have longer stated support response times, up to 72 hours.
- Larger bulk packs above 100,000 queries are listed up to 1,000,000.
Key features
- Bulk list cleaning
- Buy a pack of queries with no setup fee or subscription and upload a list of emails to be validated.
- Email validation API
- Subscription API plans let a website or program check addresses on demand, with auto renewal and auto recharge.
- Disposable and role detection
- Separate validation pages cover disposable email, role email and domain checks alongside the main email check.
- SDK modules and extensions
- The site lists SDK modules and extensions for developers integrating the API.
- Listed integrations
- Integrations include Mailchimp, SendGrid, AWeber, Mailgun and ActiveCampaign, with a longer list on its integrations page.
MailboxValidator pricing
As of Nov 13, 2026, MailboxValidator has a free plan, and paid plans start at $29.95 per month for 3,000 queries.
- Starts at
- $29.95 per month for 3,000 queries
- Free plan
- API-FREE plan: 300 queries a month, auto-renewing.
- Free trial
- None listed
| Plan | Price | What you get |
|---|---|---|
| API-FREE | $0 | 300 queries per month with standard support. |
| API-3 | $29.95per month for 3,000 queries | Auto renewal and recharge with email support. Next steps: $69.95 for 15,000, $139.95 for 75,000, $339.95 for 375,000. |
| BULK-1 | $19.95one-time for 1,000 queries, valid 30 days | Upload a list to clean. Larger packs: $59.95 for 10,000, $199.95 for 100,000 and $699.95 for 1,000,000. |
| BULK-TRIAL | $0 | 100 free queries, valid for 30 days, for trying the bulk upload. |
Read from mailboxvalidator.com on Nov 13, 2026. Prices change, so confirm with MailboxValidator before you buy.
Works with
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Common questions
Does MailboxValidator have an Android app?
No Android app was listed when its pages were read on Nov 13, 2026. MailboxValidator is listed for Web.
Does MailboxValidator have an iPhone app?
No iPhone app was listed when its pages were read on Nov 13, 2026. MailboxValidator is listed for Web.
Is MailboxValidator open source?
MailboxValidator is not described as open source on its own site, as read on Nov 13, 2026.
Does MailboxValidator have an API?
Yes. MailboxValidator offers a public API, according to its own site.
Sources for this page
The prices, plans, platforms and features above were read from these pages on Nov 13, 2026.