Email validation & verification with
≥97% accuracy.

The terms are used interchangeably in practice. "Email validation" usually emphasises syntax and format checks; "email verification" usually emphasises live SMTP probing to confirm the mailbox exists. MailChecked does both in a single check — syntax, MX, SMTP probe, catch-all detection, disposable/role classification, and historical bounce lookup — and returns one structured verdict.

Independently sampled at ≥97% accuracy against ground-truth bounce data. We measure accuracy publicly: every Valid that bounces within 14 days is auto-refunded, which puts our economic skin in the game. Most competitors quote accuracy figures they don't refund against.

We're laser-focused on accuracy and price. Most competitors charge $7–$10 per 1,000 emails and lock features behind monthly subscriptions. MailChecked charges from $5 per 1,000, never expires credits, has no subscription, and backs results with automatic refunds when a Valid verdict bounces. Same SMTP-probing engine, more honest pricing.

Yes. Upload a CSV of any size to the dashboard or POST to the bulk API and download the verified result file when it's done. Every row is processed through the same 14-stage pipeline — single-shot and bulk verification share one engine, one accuracy guarantee, and one price per email.

Yes. A single REST endpoint (GET /v1/check) returns JSON with verdict, confidence score, deliverability flag, and refund eligibility. Sub-second typical latency, generous rate limits, idempotent requests. Read the API documentation for SDK examples in Node.js, Python, PHP, Ruby, and Go.

No — and you should be skeptical of any email validator that claims they do. Gmail and Outlook don't return reliable RCPT signals, and aggressive probing tanks IP reputation for everyone. We use Gravatar lookups, MX patterns, provider heuristics, and our historical bounce database instead. Safer for your IP, more accurate in practice.

Yes. Stage 10 of the pipeline is a canary-address probe that classifies whether the destination domain accepts mail for any local part. We surface "Catch-all" as its own verdict (not folded into Valid) so you can decide whether to send and at what risk.

Yes — through the REST API and webhooks. Most teams use Zapier or Make.com to wire validation into existing flows (verify-on-form-submit, verify-on-CRM-create), or call the API directly from a custom integration. Full documentation in the API docs.

Yes — every new account starts with 100 free email verification credits, no card required. Use them on the dashboard or via the API. Cached results from prior validations are also free, so common addresses across customers don't burn fresh credits.

Nothing. They sit in your account forever. No "use it or lose it", no expiry sweep, no monthly resets.

If an address MailChecked marked Valid hard-bounces within 14 days, the credit returns to your balance automatically — no support ticket, no proof-of-bounce upload. You can also manually flag false positives; we credit on receipt and audit weekly.

Bulk uploads are retained for 30 days so you can re-download results, then permanently deleted. Per-email validation results are cached using hashed identifiers (so we don't store the plaintext address in the cross-user cache) — that's how repeat checks across customers stay free. Full details in the Privacy Policy.

Yes — our Data Processing Agreement is publicly published and pre-signed. Email hello@mailchecked.com if you need a counter-signed copy or a custom security questionnaire response.

Better — every account gets 100 free credits permanently. No card, no trial timer, no auto-conversion to a paid plan. Try the full product, then top up only if you need more.