RankFabrik Verify
FreemiumLiveLast verified 24 Sept 2026
SMTP-level email verification (valid/invalid/risky/unknown) that stops before sending, billed per result.
Example request
curl -H "X-Cle-API: $API_KEY" 'https://verify.rankfabrik.com/verifier?email=test@example.com'
Free tier, in plain English
A free trial tier gives 500 email verifications a month with no card required; paid tiers scale up from there per address returned.
Alternatives in Email Validation
Abstract Email Validation APIChecks whether an email address is real and deliverable via syntax, MX, and SMTP checks.FreemiumApexVerifyPay-as-you-go API that verifies email addresses and phone numbers in real time.Free trialCloudmersive ValidateValidates email deliverability, phone numbers, EU VAT IDs, addresses and domains in one family.FreemiumDisifyChecks email syntax, DNS/MX records, and flags disposable or temporary email addresses.FreemiumEmailvalidationChecks an email's syntax, MX records, deliverability and disposable/free-domain status.Freemium