BriteVerify
NeverBounce
ZeroBounce
Kickbox
Email List Verify
Proofy
DeBounce
Email Verifier
BounceZero
ZeroBounce
NeverBounce
VeriMails
Email List Verify
DeBounce
Kickbox
Quick Email Verification
BounceZero verifies email addresses in real time using a 5-stage pipeline: syntax check, DNS/MX lookup, SMTP handshake, catch-all detection, and ML scoring across 65+ signals.
Every email returns one of four verdicts: Deliverable, Risky, Undeliverable, or Unknown โ with a confidence score and explanation.
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BounceZero's answer:
BounceZero runs a true 5-stage verification pipeline โ syntax, DNS/MX, live SMTP handshake, catch-all detection, and ML scoring โ on every address. Most competitors stop at SMTP. We go further with a 3-probe catch-all test, XGBoost risk scoring for providers that block SMTP probes, and per-provider intelligence built from 200+ email provider profiles including every major ISP in Europe, the US, and Latin America.
BounceZero's answer:
Python (FastAPI) for the verification engine and API, PostgreSQL for data storage, XGBoost and Bayesian models for ML scoring, SMTP probing across dedicated IP pools for deliverability testing, and a PHP frontend. Hosted on OVH infrastructure with BYOIP egress for clean sending reputation.
BounceZero's answer:
Three reasons: accuracy, transparency, and price. BounceZero returns a confidence score and plain-English explanation with every result โ not just a pass/fail verdict. It costs $3 per 1,000 verifications with no subscription required and 100 free credits every month. And the API returns results in under 3 seconds with no rate limits on paid plans.
BounceZero's answer:
Email marketers, growth teams, and developers who send campaigns or build signup flows and need to keep bounce rates below 2%. Also agencies cleaning client lists before migrations and SaaS companies validating email at the point of collection via API.
BounceZero's answer:
BounceZero was built after seeing too many email campaigns destroyed by high bounce rates that could have been prevented. Existing tools were either expensive subscription products or black-box APIs that gave a verdict with no explanation. We built BounceZero to be affordable, transparent, and accurate โ starting with 100 free credits so anyone can test it without a credit card.
BounceZero's answer:
Leave this blank for now โ fill it in once you have a few named customers willing to be referenced.
NeverBounce - Real-time email verification and cleaning to ensure emails never bounce.
ZeroBounce - Removes invalid emails from your list to prevent email bounces from ruining your deliverability.
Kickbox - Verify your email address lists with our drag and drop interface, or integrate into your app with our API. Prevent fake and bot account sign-ups by confirming your users are real humans with a real email address.
VeriMails - Verify email lists at a fraction of what you pay now. From $12.50/mo for 10,000 verifications - up to 30x cheaper than ZeroBounce.
Email List Verify - The Fastest Way to Improve Email List Deliverability and ROI
Proofy - Quickly validate and verify your email lists.
