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MailSift pricing and alternatives: email verification API, GET /verify, Verify one email

MailSift's sitellms.txtBest email verification API in 2026

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67% complete: 4 of the 6 key fields we checkSee the 6 fields
$0.00per 1,000 emailsWe rank 2,467 plans by price. treg's top-up from $10 costs the least per 1,000 emails: $0.00 on average. treg asks one provider after another until one answers. You pay $26.95 per 1,000 emails when no provider answers.Enrich.so, GetProspect and treg are the best email verification API providers in our benchmark.
Plan: Free one of MailSift's 5 plans
Call: GET /verify, Verify one email one of MailSift's 6 calls
API: Email verification API MailSift's only API

About this item

  • Stored. MailSift may answer from MailSift's stored data instead of asking the mail server. MailSift doesn't say how old the data is.
  • 4 of the 6 key fields we check. Address, Deliverability, Confidence, Company.
  • Nothing to pay. You get 500 credits once, enough for 500 calls. Credits never expire.
  • One call. You send email to GET /verify. You can also send mode and Idempotency-Key. The call returns whether the address takes mail.
  • Who can get it: anyone 16 or older. Keep data: no limit. Use data: with conditions.

MailSift: email verification API alternatives

The table starts with MailSift's cheapest paid plan. Next come plans from other providers with the price per 1,000 emails closest to MailSift's. Each plan in the table gives stored data.

MailSift, $249 pack, Enterprise, GET /verify, Verify one emailStopReg, $50 monthlyUserCheck, $50 monthly, Pro 200k, POST /v1/gates/{gate_id}/decisions, Decision endpointElastic Email, $379 monthly, Email API Starter (1,500,000 emails/month), POST /verifications/filesReefAPI, $1,200 yearly
$ per 1,000 emails$0.249$0.25$0.25$0.253$0.333
Completeness67%50%50%50%67%
Billingpay firstmonthlymonthlymonthlyyearly
Pay$249$50$50$379$1,200
Enough for1,000,000 calls200,000 calls a month200,000 calls a month1,500,000 results a month300,000 calls a month
Freshnessstored (MX, SPF, DMARC: live)storedstoredstoredstored
Who can get itanyone 16 or olderanyoneanyone aged 16 or over, or the age of consent in their jurisdictionanyone at least the age of majority in their jurisdiction, with a registered accountanyone

Every email verification API provider we score, ranked

Sources

From each provider's own pricing page and docs, and from what providers tell us. We read this row from these pages on 2026-10-20.

  1. mailsift.dev
  2. mailsift.dev/api
  3. mailsift.dev/docs/api-reference.md
  4. mailsift.dev/docs/overview.md
  5. mailsift.dev/llms.txt
  6. mailsift.dev/openapi.json
  7. mailsift.dev/pricing
  8. mailsift.dev/terms

Product details

The key fields this plan's answer can hold, then each filled column in its row on the sheet.

  • Address
  • Deliverability
  • Confidence
  • Name, not in the answer
  • Place, not in the answer
  • Company
Price
$ per 1,000 emails$0.00
Percall
Billingfree
Aggregators
Aggregatorsnone
Charges
Also pays forfrom the same budget: Verify one email with Deep Verification · Verify up to 100 emails at once · Verify up to 100 emails at once with Deep Verification · Verify a CSV in bulk · Verify a CSV in bulk with Deep Verification
Not found
$ per 1,000$0.00
Catch-all
$ per 1,000$0.00
In their words
Their pitchMailSift is a fast, accurate email verification API and bulk CSV validator. It detects invalid, disposable, role-based, and risky email addresses using syntax, MX, SPF, DMARC, SMTP, and catch-all checks, returning a status and a 0–100 deliverability score.
Data
Freshnessstored (MX, SPF, DMARC: live)
Keep datano limit
Use dataYou may not use MailSift to: send unsolicited email, harass individuals, build databases of contact information for sale, circumvent rate limits or terms, or for any unlawful purpose. [...] You are responsible for having a lawful basis to process the email addresses you submit, including, where applicable, consent under the GDPR. [...] We grant you a non-transferable, revocable license to use the service for its intended purpose.
Plan
Pay$0
You get500 credits
Enough for500 calls, once
Expiresnever
Rate limit
Per second1
Batch1
Speed
Answerin the call
The call
You sendemail. Optional: mode, Idempotency-Key
MethodGET
Path/verify
About the plan
PlanFree
Who can get itanyone 16 or older
The 39 fields the plan's answer can hold

email, status, sub-status, score, mode, credits used, domain, MX records, free check, response time, checked at, engine version, normalized email, did you mean, MX provider, domain age, blocklist listings, SPF record, DMARC record, DMARC policy, catch-all confidence, reasons, syntax valid, free provider, disposable, MX, parked, relay, SPF, DMARC, catch-all, role address, blocklisted, MX routable, forwarder, SMTPUTF8, MTA-STS, TLS-RPT, BIMI

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