MailboxValidator Review 2026

Last reviewed July 2026 by Théo Pascard

MailboxValidator

MailboxValidator

Email verification via bulk upload or API

Email Verification

Overview

MailboxValidator is a straightforward email-verification service that cleans lists by flagging invalid, disposable, role and risky addresses, offered both as bulk uploads and as a developer API. With one-time bulk credits and monthly API plans plus SDKs and ESP integrations, it suits teams that want dependable list hygiene without a subscription lock-in.

Enjyn Score

iWeighted across 5 axes, computed from public review data (G2, Capterra) and reweighted on our rubric — then overridden on the axes we operate first-hand.
8.2/ 10
Output quality8.2/10
Time-to-value8.2/10
Price-to-value8.2/10
ICP fit (SMB / founder)8.2/10
Reliability & support8.2/10

How we calculate the Enjyn Score →

Who it's for

  • →Teams cleaning lists before campaigns
  • →Developers verifying at signup via API
  • →Buyers who prefer one-time bulk credits over subscriptions

Not for

Teams needing full deliverability monitoring and placement tests · Catch-all-heavy lists that need a specialist verifier · Buyers wanting the fastest, highest-accuracy modern engine

Capabilities

  • Bulk email list verification
  • Real-time verification API with SDKs
  • Disposable and role email detection
  • Domain and mail-server validation
  • One-time bulk credits (30-day validity)
  • Integrations with Mailchimp, SendGrid, Aweber and more

Ratings & reviews

4.1
16 reviews ↗
5★
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Pricing

TierPriceCredits / moNotes
Bulk (one-time)$19.95/one-time1,000One-time credits, 30-day validity: from $19.95/1,000 queries up to $699.95/1,000,000. Free 100-query trial.
API FreeFree300300 API queries/month, free.
API-3$29.95/mo3,0003,000 API queries/month; scales to 15K ($69.95), 75K ($139.95) and 375K ($339.95).

The honest take

Where it breaks

MailboxValidator does verification and little else: there's no deliverability monitoring or placement testing, catch-all handling is basic, and it's an established tool rather than the fastest or most accurate modern engine.

The verdict

A dependable, low-cost verifier for teams that want to clean lists with one-time bulk credits or a simple API, no subscription required. Look to a specialist if you need catch-all depth or full deliverability monitoring.

FAQ

What is MailboxValidator?

An email-verification service that cleans lists by detecting invalid, disposable and role addresses, available as bulk uploads or an API.

How much does MailboxValidator cost?

Bulk credits run from $19.95/1,000 up to $699.95/1,000,000 (one-time, 30-day validity); API plans start free (300/mo) and scale from $29.95/mo.

Bulk or API?

Bulk suits one-off list cleaning with one-time credits; the API suits developers verifying addresses in real time at signup or form submit.

Who is MailboxValidator best for?

Teams and developers that want dependable, low-cost list hygiene without committing to a monthly subscription.

What are its main limits?

It's verification only, not full deliverability monitoring, and it's a long-standing tool rather than the fastest or highest-accuracy modern engine.

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