Check if an email exists without sending any email. Reacher is an open-source email verification API. Vision: Become the biggest competitor to Clearbit. Use Cases: Prevent spam sign-ups on your website, Cleaning up mailing lists from junk emails. Features: Accurate - it actually connects to the mail server to check deliverability, Fast, as it's written in the performant language Rust. Each verification takes in average 1.9s, Privacy-focused and GDPR-compliant, Scales well with elastic horizontal scaling, Checks MX, SMTP, catch-all, DEA... and more, Easy monthly subscription with Stripe, 100% Open-Source, Free for personal use.