ConvertKit (now Kit) is an email-first platform that automates email marketing, newsletter growth, and digital product sales for creators.
Free·from $33/mo
About CheckMail1
What is CheckMail1?
CheckMail1 is a real-time email verification tool that checks if an email address is valid and deliverable. Instead of relying on SMTP guessing, it uses direct API calls to major email providers like Gmail, iCloud, QQ, Yahoo, and 150+ others, delivering results in under 200ms with 99.9% accuracy.
What problem does it solve?
Invalid or risky email addresses waste time, hurt sender reputation, and lower campaign ROI. CheckMail1 helps you clean your email lists before sending, reducing bounces, spam complaints, and protecting your domain reputation.
Who is it for?
It's ideal for marketers, sales teams, SaaS founders, and developers who need accurate, fast verification without committing to a subscription. You can verify a single email or upload a CSV for bulk processing. It's not built for teams needing advanced list management, scoring, or integrations beyond REST API.
Real use cases
Ecommerce stores verify customer emails at signup to reduce fake accounts; marketers clean lists before campaigns; developers integrate verification into signup forms or CRM pipelines via the REST API.
Key features
- Native API Integration — Direct calls to Gmail, Yahoo, iCloud, QQ and more, no SMTP guessing.
- Advanced Verification — Direct provider integration including iCloud and GMX for accurate results.
- Residential Proxies — Rotating IPs prevent rate limiting for consistent global results.
- Confidence Scoring — Every result includes a 0-100 score, method, and breakdown.
- Bulk Processing — Upload CSV and verify thousands of emails in parallel.
- REST API — Simple JSON API with API key auth for easy integration.
SaaSpartout Score
7.5
/10
Editorial score from our review methodology — not user ratings.
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CheckMail1 Pricing
CheckMail1 pricing: from $1 (one-time). Billing model: Lifetime.
For comparison: the median starting price in Marketing & SEO is $29/month, measured across 753 tools we track. See the full SaaS Pricing Index →
Trial – $1
100 credits, one-time. $0.010 per verification. Includes 100 verifications, all 150+ providers, REST API access. Credits never expire.
Starter – $5
1,000 credits, one-time. $0.005 per verification. Includes 1,000 verifications, all 150+ providers, REST API access. Credits never expire.
Basic – $12 (Most Popular)
3,000 credits, one-time. $0.004 per verification. Includes 3,000 verifications, all 150+ providers, REST API + API key, bulk CSV upload. Credits never expire.
Pro – $29
10,000 credits, one-time. $0.0029 per verification. Includes 10,000 verifications, all 150+ providers, REST API + API key, bulk CSV up to 1M. Credits never expire.
Business – $69
30,000 credits, one-time. $0.0023 per verification. Includes 30,000 verifications, all 150+ providers, REST API + API key, bulk CSV up to 1M. Credits never expire.
Enterprise – $169
100,000 credits, one-time. $0.00169 per verification. Includes 100,000 verifications, all 150+ providers, REST API + API key, bulk CSV up to 1M, priority support. Credits never expire.
Every new account gets 100 free credits – no payment needed to start.
Frequently asked questions
Is CheckMail1 free?
CheckMail1 offers 100 free credits to every new account, no payment needed. After that, paid plans start at $1 for 100 credits.
How much does CheckMail1 cost?
CheckMail1 uses one-time credit packs. Prices range from $1 (100 credits) to $169 (100,000 credits). There are no subscriptions and credits never expire.
Who is CheckMail1 best for?
It's best for small businesses, developers, and marketers who need fast, accurate verification without monthly commitments. It's also great for verifying emails from specific providers like Gmail, iCloud, QQ, or Yahoo.
How does CheckMail1 work?
It uses direct API calls to email providers and advanced checks (like browser fingerprinting) to verify if an email is real and deliverable. Results return in under 200ms with a confidence score.
What are the top alternatives to CheckMail1?
Alternatives include NeverBounce, ZeroBounce, and Hunter.io. However, CheckMail1 stands out with no subscriptions, one-time pricing, and support for 150+ providers including Chinese email services like QQ Mail.
