Trusted by marketers & developers worldwide
Your data stays private and secure — we never store or sell your email lists.
GDPR & CCPA Compliant
Built with privacy-first architecture, your verification jobs are encrypted end-to-end and deleted after processing.
Everything you need to stay deliverable
From single checks to massive uploads — Esigil gives you precision, simplicity, and speed in one beautiful dashboard.
Accurate Verification
Detect disposable, invalid, and risky emails in milliseconds using our advanced validation engine.
Bulk Uploads Simplified
Drag & drop CSVs or connect via API — process thousands of addresses without lifting a finger.
Real-Time API Checks
Verify emails instantly at signup or checkout — prevent fake users before they enter your CRM.
Smart Verification Pipeline
Every email goes through a human-like, multi-layer process that filters out fakes, traps, and risky addresses before they ever reach your CRM.
Syntax & Domain Check
Instantly catch formatting errors and confirm the domain's authenticity.
- RFC compliance
- MX & DNS lookup
- Subdomain detection
Mailbox & Risk Detection
Detect spam traps, honeypots, and unsafe inboxes using live server validation.
- Mail server ping
- Spam trap flagging
- Reputation scoring
Final Integrity Review
Get a complete confidence score and delivery probability report in seconds.
- Catch-all detection
- Risk report
- Trust metric
Security That's Built Into Every Layer
We treat your data with the same care we'd want for our own. End-to-end encryption, auto-deletion after processing, and GDPR-ready systems mean total peace of mind for you and your users.
100%
Encrypted Processing
GDPR
Fully Compliant
Built for Safety
Every verification job runs in a secure sandbox — isolated from others, monitored for anomalies, and wiped clean once complete.
Simple, Honest Pricing
Pay only for what you need — no hidden fees, no confusing tiers. Every plan comes with the same powerful verification engine.
Try 100 verifications free — no credit card needed.
Powerful API. Built for Developers.
Our RESTful API lets you integrate email verification directly into your app, CRM, or automation workflow — no friction, no limits.
fetch("https://api.esigil.com/v1/verify", {
method: "POST",
headers: {
"Authorization": "Bearer YOUR_API_KEY",
"Content-Type": "application/json"
},
body: JSON.stringify({ email: "hello@example.com" })
}).then(res => res.json())
.then(data => console.log(data));⚡ Easy Integration
Start verifying within minutes — our API works smoothly with any stack, from Node.js to Python to Zapier.
🔐 Secure & Reliable
Every request is encrypted, logged, and processed in real-time using our global validation infrastructure.
📈 Scale Effortlessly
From 100 to 10 million verifications — scale seamlessly with our predictable, pay-as-you-grow model.