SieveThe best email verification alternatives
Sieve is one option among several good ones, and no single tool wins on every axis. Here is a straight guide to the main email verification tools, what each is genuinely best at, and how Sieve compares, including the rows where the other tool comes out ahead.
The short version: MillionVerifier is the cheapest per 1,000, Hunter is the specialist at finding brand-new addresses, and ZeroBounce is the most established brand with the widest integrations. Sieve leads on evidence, single-tenant privacy and pre-send risk. Pick by what you actually need.
Sieve vs ZeroBounce
ZeroBounce: $7 to $8 / 1kZeroBounce is the more established brand with more prebuilt integrations. Sieve gives you the evidence behind every verdict, catch-all confidence scores and single-tenant privacy, usually at a lower price per 1,000.
Read the full Sieve vs ZeroBounce comparisonSieve vs MillionVerifier
MillionVerifier: $0.59 to $3.90 / 1kMillionVerifier is the cheapest per 1,000 and does not charge for unknowns. Sieve costs a little more but returns a verdict receipt, a catch-all confidence score and a pre-send risk verdict that MillionVerifier does not.
Read the full Sieve vs MillionVerifier comparisonSieve vs Hunter
Hunter: ~$8 / 1kHunter is built around finding new email addresses. Sieve is built around proving whether the addresses you already have are safe to send to, with evidence on every verdict.
Read the full Sieve vs Hunter comparisonWant them all in one table? See Sieve, ZeroBounce, MillionVerifier and Hunter side by side.
Judge us before you pay anything
Grade your sending domain's deliverability free: MX, SPF, DKIM, DMARC, blacklists. No signup.
Then verify a list with receipts
Unlimited DNS checks plus 100 live SMTP verifications a month, free. Every paid verdict ships with its evidence.