About Warmy
Built by deliverability obsessives
We started Warmy because we kept watching great products fail to reach inboxes. The technology to fix that existed — nobody had built it right. So we did.
Our mission
“Cold email is broken. Spam filters are aggressive. We built Warmy to fix that.”
Modern spam filters use machine learning trained on billions of signals. A fresh inbox sending cold outreach looks identical to a spammer's domain to these systems — regardless of your intent. Warmy builds the reputation history that tells providers you're the real deal, before your first campaign ever sends.
2025
Founded
14,000+
Users
2.8B
Emails warmed
99.9%
Uptime
What we believe
Trust over volume
Every decision we make optimises for long-term inbox trust, not vanity metrics. We would rather your warmup be slow and right than fast and flagged.
Real signals only
Our warmup network uses genuine human-like interactions — realistic content, natural timing, authentic replies. No bot farms, no shortcuts.
Obsess over deliverability
We track every major spam filter update, RFC change, and provider policy shift so you don't have to. Deliverability is our full-time job.
Questions about us? We're a small team — reach out directly.
hello@warmy.io