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MillionVerifier alternative: when ContactLint fits and when it does not

Facts checked October 18, 2026

MillionVerifier and ContactLint answer different questions. MillionVerifier checks whether a mailbox exists. ContactLint checks whether an address is worth saving: is the syntax right, does the domain accept mail, is it a throwaway or role inbox, and is it a typo of a big provider. That smaller check is why it costs less.

The short answer

Stay with MillionVerifier if you clean large lists before sending, want catch-all verification included, or want your email platform lists cleaned on a schedule.
Choose ContactLint if you check addresses one at a time as they arrive, at a signup form or inside an AI agent, want phone validation on the same key, or want a hosted MCP server.

MillionVerifier lists 50,000 credits for $89 and 1 million for $449, gives 100 free credits with a free account, refunds credits for emails it cannot verify with certainty and says credits never expire. Its calculator starts at 10,000 credits. ContactLint's smallest pack is 5,000 checks for $9. They are not the same check: MillionVerifier verifies the mailbox, ContactLint does not.

Side by side

	ContactLint	MillionVerifier
Confirms the mailbox exists (SMTP)	No. Syntax, DNS/MX, disposable, role and typo checks only; no SMTP connection, no catch-all detection	Yes, sold as email verification, including a catch-all email verifier (source)
Smallest purchase	5,000 checks for $9	Calculator starts at 10K credits; 50K credits are $89 ($0.00178 per credit) (source)
5,000 checks	$9	Not listed
25,000 checks	$35	Not listed
100,000 checks	$99	Not listed
Free to start	100 checks every month, no card	100 verification credits with a free account, no card (source)
Unknown results	Not charged: any check whose DNS lookup fails is given back	Refund on any email they cannot verify with certainty ("Risky Email Refund") (source)
Credits expire?	No expiry in our terms; unused credits refundable within 14 days	Never (source)
Typo suggestions	Yes, did_you_mean for major providers (gmial.com to gmail.com)	Yes, a didyoumean field per their API guide (source)
MCP server for AI agents	Hosted remote server at /mcp, nothing to install	Not listed on the pages we read
Phone validation	Yes, same key and same credits	Not listed

Competitor facts read from each vendor's public pages on October 18, 2026 and linked in each cell. Prices change; follow the links for current terms. "Not listed" means the page we read did not state it, not that the vendor lacks it.

What switching looks like

Create a free key at /signup.
Replace one HTTP call: POST /v1/email/validate with {"email": "..."}, or /v1/email/validate/batch for up to 50 addresses.
Map verdicts: invalid reject, risky ask the user or review (show did_you_mean when set), valid accept, unknown accept or retry later.

curl -X POST https://contactlint.com/v1/email/validate \
  -H "Authorization: Bearer YOUR_KEY" -H "content-type: application/json" \
  -d '{"email":"jane@gmial.com"}'

Guides: server-side check on form submit, drop-in typo widget, email validation for AI agents.

Questions

Is ContactLint a full replacement for MillionVerifier?

Only if you do not need mailbox verification. MillionVerifier tests whether the mailbox exists; ContactLint checks syntax, DNS/MX, disposable domains, role addresses and typos, and never connects to mail servers.

Can I use ContactLint and MillionVerifier together?

Yes. A common split is ContactLint at the signup form or inside an AI agent, where volume is steady and a fast cheap check is enough, and a mailbox verifier for occasional deep cleans of an old list.

How do I try ContactLint?

Create a free key at contactlint.com/signup (100 checks per month, no card), or run a live check on the home page without a key.

How we made this page

Written by the ContactLint team. MillionVerifier facts were read from its public pages on October 18, 2026 and are linked in each table cell; we did not test its API. ContactLint facts come from our pricing and API spec. Spot something out of date? Email support@contactlint.com and we will fix it.

Get a free API key. 100 checks per month, no card required. Or try a live check first.