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MailSift pricing and alternatives: cached email verification API, POST /verify/bulk

MailSift's sitellms.txtBest cached email verification API in 2026
50% complete: 3 of the 6 key fields we checkSee the 6 fields
$0.00per 1,000 emailsThe cheapest of the 344 priced plans is StableEnrich, pay as you go, at $0.005 per 1,000.
Plan: Free one of MailSift's 5 plans
Call: POST /verify/bulk one of MailSift's 3 calls
API: Cached email verification API one of MailSift's 2 APIs

About this item

  • Stored. MailSift may skip the mail server and answer from data it keeps. MailSift doesn't say how old the data is.
  • 3 of the 6 key fields we check. Address, Deliverability, Confidence.
  • Nothing to pay. You get 500 credits once, enough for 500 results. Credits never expire.
  • One call. You send file to POST /verify/bulk. You can also send mode. The call returns a job. You fetch the answer once the job is done. Or the provider sends the answer to your webhook.
  • Who can get it: anyone 16 or older. Keep data: no limit. Use data: with conditions.

MailSift: cached email verification API alternatives

We list other providers' plans closest to this plan in price per 1,000 emails. Each plan in the table gives stored data, not live data, like this plan.

This planMailSift, free, Free, POST /verify/bulkEmailDetective, free, Free, POST /emailsStrale, free, trial credits, POST /v1/do, Bulk Email ValidationAPIVerve, freeBotoi, free, Free, POST /v1/disposable-email/check
$ per 1,000$0.00$0.00$0.00$0.00$0.00
Completeness50%83%50%50%50%
Billingfreefreefreefreefree
Pay$0$0$0$0$0
Enough for500 results, once1,000 results a monthnot published10 calls a month1,000 calls a day
Freshnessstored (MX, SPF, DMARC: live)storedstoredstored (MX valid, MX record, null MX, can receive mail, has SPF, has DMARC: live)stored
Who can get itanyone 16 or olderanyoneanyone who signs up, one trial credit per email addressanyone 13 or over (under 18 only with the permission of a parent or legal guardian)anyone 18 or older

Every cached 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, not in the answer
Price
$ per 1,000$0.00
Billingfree
Aggregators
Aggregatorsnone
Charges
Perresult
Also pays forfrom the same budget: Verify one email · 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 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 results, once
Expiresnever
Rate limit
Per second1
Speed
Answerby polling or webhook
The call
You sendfile. Optional: mode
MethodPOST
Path/verify/bulk
About the plan
PlanFree
Who can get itanyone 16 or older
The 31 fields the plan's answer can hold

job ID, filename, total rows, processed rows, valid count, invalid count, risky count, unknown count, job status, mode, credits reserved, error message, started at, completed at, created at, email, status, sub-status, score, disposable, MX, role address, free provider, relay, blocklisted, SPF, DMARC, domain age, MX provider, normalized email, did you mean

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