Warmbly
The largest open-source cold email platform
Ranked #2935 on TrustMRR
69 active subscriptions
Matthew Meszaros2,349 followers on 𝕏
United KingdomRevenue is verified with
Stripe API key.Last updated: Nov 13, 2026, 11:47 AM
An open-source cold email platform that warms mailboxes, runs campaigns across them, monitors deliverability, and centralizes replies, CRM, and automation in one dashboard.
Cold outreach teams need to protect sender reputation and inbox placement while coordinating campaigns and replies across many mailboxes; Warmbly combines warmup, sending, deliverability monitoring, lead finding, and reply management.
Pricing
14-day free trial. Starter: $29/month ($23/month billed annually); Grow: $89/month ($71/month annually); Business: $329/month ($263/month annually); Enterprise: custom. Agency plans: $199/month and $479/month billed annually. Self-hosting is free.
Domain Rating
warmbly.com
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