Mailsurity vs mailsentry
mailsentry verifies syntax, MX, and SMTP, and returns several mailbox statuses in one call: Disposable, Role, Catch-All, Full, and Disabled. Mailsurity does one thing: catch disposable signups, including domains mailsentry has not seen yet.
Quick verdict
Choose mailsentry for broader mailbox-status verification
You need to know whether a mailbox is full, disabled, a role account, or catch-all, not just whether the domain is disposable, in one verification call.
Choose Mailsurity for disposable email detection
You specifically need to stop disposable/burner signups in real time, with brand-new throwaway domains caught before a static list catches up.
Pricing
mailsentry.io references "Pricing Plans, and Credit Packs" but does not surface exact tier names or prices in a form this page could confirm at verification time; see mailsentry.io/pricing-plans directly for current figures. Mailsurity is a monthly credit subscription with a free tier to start. Figures below are Mailsurity's live current prices, not estimates.
mailsentry
Free credits on signup / guest mode; exact amount not published
Paid tiers not verified; see mailsentry.io/pricing-plans
Mailsurity
500 free credits, no card required
$5/mo on Starter ≈ $1.00 per 1,000 checks*
Starter
$5 / month
5,000 checks / month
Growth
$19 / month
25,000 checks / month
Scale
$59 / month
100,000 checks / month
* Cost-per-1,000 assumes the full monthly credit allotment gets used. Unused Mailsurity credits don't roll over, so the effective rate is higher below full utilization.
Prices shown are Mailsurity's current live plans (see /pricing for the full breakdown, including annual billing); Mailsurity pricing verified September 2026. mailsentry's pricing page was checked the same date, but its plan names and prices did not surface in a form this research could confirm (mailsentry.io references "Pricing Plans, and Credit Packs" but does not surface exact tier names or prices in a form this page could confirm at verification time; see mailsentry.io/pricing-plans directly for current figures) — confirm current rates directly on mailsentry.io before deciding.
Feature comparison
Primary focus
mailsentry: Real-time email verification API: syntax, MX, and SMTP checks, plus detection of Disposable/Role/Catch-All/Full/Disabled mailbox statuses
Mailsurity: Disposable / temporary / burner email detection, specifically
Disposable-domain method
mailsentry: Disposable is one status among several a single verification call can return; the underlying method isn’t published
Mailsurity: 5 checks in order: your team's own allow/deny rules, a curated known-good list, a 220k+ domain disposable list, a saved verdict from a past check, then live analysis (with AI for unclear, brand-new domains)
Brand-new throwaway domains
mailsentry: Not documented as a dedicated capability
Mailsurity: MX-cluster reputation (tracking which mail servers throwaway-email providers tend to reuse) + AI gray-zone fallback (an AI check for domains the heuristics can't confidently call either way) can flag a domain before any static list has it
Free tier
mailsentry: Site advertises free credits on signup and a guest mode without registration; exact free-credit amount not published
Mailsurity: 500 free credits, no card required
Pricing model
mailsentry: mailsentry.io references "Pricing Plans, and Credit Packs" but does not surface exact tier names or prices in a form this page could confirm at verification time; see mailsentry.io/pricing-plans directly for current figures
Mailsurity: Monthly subscription, credits reset each cycle; see plans below
Typical latency
mailsentry: Not published
Mailsurity: <100ms p99 on the real-time API
Bulk CSV list cleaning
mailsentry: Yes, single and bulk email uploads with a dashboard report
Mailsurity: Yes, enriched CSV back with classification, confidence, and source per row
The entire Mailsurity integration is one authenticated POST with plain fetch. No client library required.
curl -X POST https://mailsurity.com/api/check-email \
-H "Authorization: Bearer YOUR_API_KEY" \
-H "Content-Type: application/json" \
-d '{"email": "user@mailinator.com"}'Example response:
{
"email": "user@mailinator.com",
"isDisposable": true,
"classification": "disposable",
"confidence": 0.94,
"reason": "high-entropy local part; MX cluster flagged disposable",
"source": "heuristic"
}Full request/response schema, error codes, and code samples in eight languages: see the API reference.
Why list-based disposable email detection misses new domains
Domain lists catch everything already added. The gap is timing: a new throwaway domain has to be discovered and added before it can be blocked.
Mailsurity layers MX-cluster reputation and an AI fallback for gray-zone domains on top of its own list. A domain can get caught on its first request, before it has ever been added to any list. See the full 5-layer detection cascade for how each layer works.
220k+ tracked domains
Sourced from public disposable-domain feeds and live throwaway-provider scraping, kept current as new ones appear.
99.4% accuracy
Measured on disposable/temporary email classification, the one thing Mailsurity is built to do.
FAQ
Is Mailsurity a good mailsentry alternative?
If you want one call returning syntax, MX, SMTP, and a Disposable/Role/Catch-All/Full/Disabled status set, mailsentry covers that and Mailsurity does not replace it. If disposable detection specifically is the problem, including domains mailsentry has not seen yet, that is what Mailsurity is built for, with a 500-credit free tier to try it first.
How does mailsentry’s pricing compare to Mailsurity’s?
mailsentry.io references "Pricing Plans, and Credit Packs" but does not surface exact tier names or prices in a form this page could confirm at verification time; see mailsentry.io/pricing-plans directly for current figures. Mailsurity is a monthly subscription with a documented free tier (500 credits, no card); see the live pricing above to compare once you have mailsentry’s current figures in hand.
Does mailsentry do more than disposable-email detection?
Yes. mailsentry verifies syntax, MX, and SMTP and returns several mailbox statuses (Disposable, Role, Catch-All, Full, Disabled) in one call. Mailsurity only classifies disposable/temporary emails.
Can I use Mailsurity and mailsentry together?
Some teams run Mailsurity at signup time for real-time disposable blocking, and use mailsentry separately for the broader mailbox-status checks (role accounts, full/disabled mailboxes) it covers that Mailsurity does not. They are not mutually exclusive.
How many disposable signups get through your forms
Paste your signup list into the free audit: no signup required, and the part before the @ never leaves your browser. Or start with 500 free API credits, no card required.