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Measured on six things

Bulk email verifier with 99% accuracy, pay-as-you-go cred...

Security

HTTPS enforced, SPF and DMARC in place, Bearer-token API auth. But no HSTS, no CSP, no frame protection, no Permissions-Policy, and no SOC 2, ISO, or security page anywhere on the site.

Screenshots

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MailVeri

About this app

I recently gave MailVeri a spin for a client's 50k-subscriber list, and it honestly surprised me. Bulk email verification tools are a dime a dozen, but most either charge an arm and a leg or expire your credits before you can blink. MailVeri flips that script: you buy credits once, they never expire, and the pricing starts at a ridiculously affordable $9 for 10,000 verifications. The platform handles CSV, XLSX, and TXT files up to 100MB (that's 1 million emails per list), and it auto-detects your email column—no tedious mapping required. I uploaded a messy 80k-row CSV and had a clean, segmented file back in under 30 minutes. The accuracy is top-notch: it caught disposable addresses, role accounts, catch-alls, and even full inboxes that other tools often miss. The real-time API is a breeze to integrate; I hooked it into a client's signup form in about 15 minutes and watched fake signups plummet. Plus, they give you 1,000 free credits on signup, no credit card needed. If you're tired ...

Key features

1Bulk verification of up to 1,000,000 emails per file (CSV, XLSX, XLS, TXT up to 100MB) with automatic email-column detection.
2Real-time REST API with Bearer auth, code samples in cURL/Python/JS/PHP, and an MCP integration guide for Claude, Cursor, and other AI tools.
3Detection types: syntax, domain, SMTP, disposable, role-account, catch-all, and full-inbox — all included on every pricing tier.
4Pay-as-you-go credits that never expire, starting at $9 for 10,000 credits ($0.0009/email) down to $0.0002/email at 5M credits.
51,000 free credits on signup with no credit card required, plus interactive savings and ESP-waste calculators.

Target customer profile

Drawn from the product itself, not from a survey.

Demographic

Digital marketing agencies

Pain points

High bounce rates, expensive legacy tools, expired credits, complex integrations.

Primary needs

Affordable bulk verification, API for client onboarding, detailed reporting, no credit expiry.

Demographic

SaaS companies

Pain points

Fake signups, disposable emails, poor sender reputation, manual list cleaning.

Primary needs

Real-time API for signup forms, catch-all detection, role account filtering, easy integration.

Demographic

E-commerce store owners

Pain points

Low email deliverability, wasted marketing budget, spam folder placement.

Primary needs

Cost-effective list cleaning, high accuracy, fast turnaround, pay-as-you-go pricing.

Demographic

Non-profit organizations

Pain points

Limited budgets, donor email list decay, low engagement rates.

Primary needs

Free trial credits, affordable bulk pricing, segmentation, deliverability improvement.

Scout Review

Written by AI from measured evidence, scored out of 100.

MailVeri is a pay-as-you-go email verification service that undercuts ZeroBounce by roughly 91% at the 100k-email tier ($59 vs $649) and refuses to expire your credits — a genuinely customer-friendly policy in a category where expiry is the norm. The product itself is competent: bulk CSV/XLSX/TXT upload up to 100MB, auto email-column detection, disposable/catch-all/role-account/full-inbox detection, a REST API with real code samples in four languages, and an MCP integration guide for AI assistants that most competitors haven't bothered with. The free tier (1,000 credits, no card) is a low-risk way to test accuracy against your own list. Where it falls short: mobile page performance is sluggish (LCP 5.4s), the security posture is thin (6/12 headers, no SOC 2, no HSTS, no CSP), and the testimonials are unverifiable. If you're a marketing agency or SaaS team with a messy list and a tight budget, the value proposition is hard to argue with. If you're a procurement team that needs compliance paperwork, keep looking.

Measure by measure

Usability

1,000 free credits with no card, auto email-column detection, and a genuinely useful API docs page with cURL/Python/JS/PHP samples plus MCP setup. Onboarding path from signup to first verification is short.

Design

Modern dark SaaS layout with custom savings and ESP-waste calculators, consistent card grids, and clear stat blocks. Testimonials use named personas without photos or source links, which slightly undercuts trust.

Speed

Desktop Lighthouse 95/100 is genuinely fast, but mobile lands at 70 with a 5.4s LCP — well past the 2.5s 'good' threshold. Vendor claims <1s API latency and 99.9% uptime, unverified.

Security

HTTPS enforced, SPF and DMARC in place, Bearer-token API auth. But no HSTS, no CSP, no frame protection, no Permissions-Policy, and no SOC 2, ISO, or security page anywhere on the site.

Accessibility

Lighthouse accessibility 96/100 with a single failing contrast audit. No a11y statement, WCAG claim, or keyboard-nav docs, but the automated baseline is strong and the site is responsive.

Growth

Real recurring pain (list decay, ESP billing for dead contacts), a concrete price wedge vs ZeroBounce/NeverBounce, and non-expiring credits. Differentiated but not defensible — any competitor can copy the pricing.

Improvement areas

Security posture: add HSTS, CSP, X-Frame-Options, and Permissions-Policy; publish a security page with SOC 2 status, GDPR details, and 2FA support.
Mobile performance: LCP is 5.4s on mobile (desktop is 95/100) — compress hero assets, defer non-critical JS, and serve responsive images.
Trust signals: testimonials have no photos, links, or embedded review widget — replace with verifiable Trustpilot/G2 integration or real case studies.
Documentation depth: no help center, video walkthrough, or live chat; the FAQ was truncated and troubleshooting resources are thin.

Design & Usability

MailVeri's site is a competent, modern SaaS build — dark hero, stat counters (17B+ verified, 99% deliverability), a drag-and-drop upload widget, and two custom calculators (volume savings vs ZeroBounce, and an ESP waste calculator that shows you how much Klaviyo is charging you to store dead contacts). Those calculators are the sharpest design choice on the page: they do the selling for you. The pricing page renders nine credit tiers cleanly with per-email unit pricing and a 'Best Seller +20% Bonus' badge. Where design slips is trust: six testimonials with full names, titles, and companies, but no photos, no LinkedIn links, no Trustpilot widget actually embedded — just the word 'Excellent' floating above them. Usability is the stronger half. 1,000 free credits with no credit card, auto email-column detection on CSV/XLSX/TXT up to 100MB, and a docs page that publishes real cURL, Python, JavaScript, and PHP samples plus an MCP guide for Claude Desktop and Cursor. That MCP doc is a genuinely forward-looking touch most competitors don't have. The gap is depth: the FAQ got truncated in our fetch, and there's no visible help center, no video walkthrough, no live chat widget mentioned. Onboarding is fast; troubleshooting is where you'd be on your own.

Speed & Security

Speed is split cleanly down the middle. Desktop Lighthouse performance is 95/100 with TBT at 69ms and CLS at 0.088 — that's a fast, stable page on a real machine. Mobile is a different story: 70/100 with LCP at 5.4 seconds and FCP at 3.6 seconds. A 5.4s LCP is more than double Google's 'good' threshold, and for a product whose entire pitch is 'upload a list and get results fast,' a sluggish mobile landing page is an awkward first impression. The site advertises <1s average API latency and a 99.9% uptime SLA on the docs page — those are vendor claims we could not independently verify, so treat them as marketing until you've run your own load test. Security is the weakest dimension. HTTPS is enforced, SPF and DMARC are published, and the API uses Bearer token auth over TLS — those are the table stakes and they're met. But the header probe scored 6/12: no HSTS, no Content-Security-Policy, no X-Frame-Options or frame-ancestors, no Permissions-Policy. There's no SOC 2 report, no ISO 27001, no GDPR statement, no security page, no bug bounty, and no mention of 2FA or SSO on the account side. For a tool that ingests your customer email lists — arguably the most sensitive asset a marketing team holds — that's a thin security posture. None of it is a breach; all of it is a gap a procurement team will flag.

Accessibility & Growth

Accessibility is the quiet strength here. Lighthouse's axe-core audit scored 96/100, with exactly one failing check: insufficient background/foreground color contrast somewhere on the page. That's a strong automated baseline — better than most indie SaaS tools we review. What's missing is the paperwork and the manual coverage: no accessibility statement, no WCAG 2.1 conformance claim, no documented keyboard-navigation support, no screen-reader notes, and the site is English-only. Automated audits catch roughly a third of real WCAG issues, so 96/100 means 'no obvious landmines,' not 'certified accessible.' Growth is where the interesting judgment sits. The problem MailVeri names is real and recurring: the site cites 22% annual list decay, and its ESP waste calculator shows a 100k-list Klaviyo user burning ~$3,696/year storing dead contacts. The wedge is explicit — $0.0002 to $0.0009 per email versus ZeroBounce's $0.00649, plus credits that never expire, versus ZeroBounce's 365-day expiry. Against the listed alternatives (ZeroBounce, NeverBounce, Hunter.io), that's a clear, demonstrable price-and-policy advantage. What it is not is defensible. Pricing is the easiest thing in SaaS to copy, and the underlying SMTP-validation tech is commoditized. The domain is 4.6 years old and the site claims 10,000+ users and 17B+ verified emails — unverified, but if even directionally true, there's a real installed base. The honest read: a solid wedge into a crowded category, with no structural moat to keep it.

Conclusion

The real test for any verification tool isn't the landing page — it's whether it catches the addresses your current tool misses. MailVeri's free 1,000 credits exist precisely so you can run that test on your own worst list before spending a dollar. Do that first. Upload a segment you already know the bounce rate on, compare the VALID/INVALID/CATCH-ALL breakdown against what you expected, and check whether the catch-all detection is aggressive enough for your sending setup. If it holds up, the $59 tier for 100k emails is a genuinely good deal, and the non-expiring credits mean you can buy in bulk without racing a clock. If it doesn't, you've lost an afternoon and nothing else. The bigger open question is whether MailVeri can grow into the compliance and reliability posture that larger buyers need — SOC 2, HSTS, a real security page — or whether it stays a great value play for agencies and indie SaaS. Right now it's the latter, and it's a good one.

Suggestions for improvement

Publish a security page with SOC 2 status (even 'in progress'), GDPR/data-handling details, and 2FA support — procurement teams will ask.
Fix the mobile LCP (5.4s). Compress hero assets, defer non-critical JS, and serve responsive images — desktop is already at 95.
Add HSTS, a Content-Security-Policy, and X-Frame-Options. These are cheap header wins that move the security checklist from 6/12 to 9/12.
Replace the unverifiable testimonials with an embedded Trustpilot/G2 widget or link to real case studies — the 'Excellent' badge currently floats over nothing.

How we score

Alternatives comparison

Named competitors, point by point. Nobody paid to appear here or to be left out.

	MailVeri	ZeroBounce	NeverBounce	Hunter.io
Starting price for bulk verification	$9 for 10,000 credits ($0.0009/email)	Pay-as-you-go from ~$0.00649/email at 100k volume	Tiered pricing, steeper at large volumes	Free tier limited; paid plans from ~$34/mo
Credit expiry policy	Credits never expire	Credits expire after 365 days	Credits tied to subscription period	Monthly search/verification quotas reset
Free trial credits	1,000 free credits, no credit card	100 free credits on signup	1,000 free verifications via dashboard	25 free searches/month on free plan
Bulk file upload limit	Up to 1,000,000 rows / 100MB per file	Large list support, file size varies by plan	Bulk upload supported, size limits by plan	Limited bulk cleaning capacity
Real-time API for signup forms	REST API, Bearer auth, MCP integration guide	REST API with SDKs, well documented	Real-time verification API, mature	Email verification API available
Detection types included	Syntax, domain, SMTP, disposable, role, catch-all, full inbox	Full suite incl. abuse, spam trap, toxic domain	Syntax, domain, SMTP, disposable, catch-all	Syntax, domain, SMTP; lighter on bulk detection types
Published security compliance	No SOC 2, ISO, or security page found	SOC 2 Type 2, GDPR compliant, security page	SOC 2, GDPR, published security documentation	GDPR compliant, security page published