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.
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.