Mailsurity vs NeverBounce
NeverBounce cleans email lists: valid, invalid, disposable, and catch-all in one pass. Mailsurity answers one question: is this signup email disposable? It answers in real time with an AI fallback for domains NeverBounce has not listed.
Quick take
NeverBounce
A general list verifier: valid, invalid, catch-all, and disposable in one pass, with CRM and ESP integrations.
Mailsurity
500 free credits, no card. A 5-layer cascade built for disposable detection only, including AI fallback and MX-cluster reputation for new domains.
Pricing
NeverBounce charges per verification or via subscription. Mailsurity is a monthly credit subscription with a free tier. Figures below are Mailsurity\u2019s live prices.
| NeverBounce | Mailsurity | |
|---|---|---|
| Free tier | Free trial verification credits on signup | 500 free credits, no card required |
| Pay-as-you-go rate | ~$0.008/email at entry volume, down to ~$0.002/email at 2M+ verifications | Subscription-based (see plans below), no metered pay-per-check tier |
| Entry subscription | Essentials: $10/mo for 1,000 verifications | $5/mo for 5,000 checks |
| Credit expiry | Purchased credits expire 12 months after purchase | Monthly credits reset each billing cycle (no rollover) |
Starter
$5 / month
5,000 checks / month
Growth
$19 / month
25,000 checks / month
Scale
$59 / month
100,000 checks / month
Prices shown are Mailsurity's current live plans (see /pricing for the full breakdown). NeverBounce's own pricing page requires an account to view line-item detail; figures above are compiled from third-party pricing guides, verified July 2026. Confirm current rates directly with NeverBounce before deciding, since vendor pricing can change.
Feature comparison
Primary focus
Mailsurity: Disposable / temporary / burner email detection, specifically
NeverBounce: General email-list verification (valid / invalid / disposable / catch-all), built for list hygiene
Disposable-domain method
Mailsurity: 5-layer cascade: per-team rules -> static legit-list -> 220k+ domain list -> cached AI verdict -> live heuristics/LLM for gray-zone domains
NeverBounce: Disposable is returned as one of several verification statuses; the underlying detection method isn’t published
Real-time single-email API
Mailsurity: Yes, <100ms p99, purpose-built for the signup path
NeverBounce: Yes, a single-check endpoint exists alongside a separate bulk-list upload/poll flow for large lists
AI gray-zone fallback for new domains
Mailsurity: Yes, LLM tie-break for domains no static list has caught yet, verdict cached 30 days
NeverBounce: Not documented
Pricing model
Mailsurity: Monthly subscription with a free tier to start; credits reset each cycle
NeverBounce: Pay-as-you-go credits (~$0.008/email at entry volume, down to ~$0.002/email at 2M+) or an Essentials subscription ($10/mo for 1,000 verifications); purchased credits expire 12 months after purchase
Free trial
Mailsurity: 500 free credits, no card required
NeverBounce: Free trial verification credits on signup; the exact amount varies by source, so confirm current terms with NeverBounce directly
Bulk CSV / list cleaning
Mailsurity: Yes, dashboard upload with an enriched CSV returned, including classification, confidence, and source
NeverBounce: Yes, this is NeverBounce’s core use case, plus CRM/ESP integrations (Mailchimp, HubSpot, Salesforce, and others)
Per-team allow / deny rules
Mailsurity: Yes
NeverBounce: Not offered
Which one should you use?
Pick NeverBounce if…
You need full list cleaning (valid, invalid, catch-all, disposable) with CRM integrations, and disposable detection is one check among several.
Pick Mailsurity if…
You are stopping disposable and burner signups at the moment they happen, and need a real-time endpoint with AI fallback, per-team rules, and a free tier.
FAQ
Does NeverBounce catch disposable emails as well as Mailsurity?
NeverBounce returns disposable as one status among several. It does not publish a disposable-specific accuracy number. Mailsurity’s 99.4% is measured on disposable detection alone, because that is all it does.
Is NeverBounce cheaper than Mailsurity?
NeverBounce starts around $0.008/email and drops at high volume. Mailsurity starts free with 500 credits. Which is cheaper depends on whether you need NeverBounce’s broader suite or just disposable detection.
Can I use NeverBounce for real-time signup checks, not just bulk list cleaning?
NeverBounce has a single-check endpoint too. It does not document an AI fallback for new domains or per-team rules, both of which Mailsurity includes.
How many disposable signups get through your forms
Paste your signup list into the free audit. The part before the @ never leaves your browser. Or start with 500 free API credits, no card required.