Warmy

Warmy is an email warmup and deliverability platform for senders trying to build or repair mailbox reputation. The official accessible docs clearly describe a 7-day trial with one connected mailbox and limited daily seed emails. Paid pricing was not exposed in the crawled official pricing docs, so this profile avoids quoting third-party price claims.

The question here is which one a backend engineer would rather operate. That means SDK depth in the language already in use, whether a retry can safely be replayed, how much the event log tells you when a customer says the email never arrived, and whether the pricing curve stays sane as volume grows.

Against password resets, receipts, and magic links shipped from application code, Warmy covers developer experience and event stream, and does not cover SDK breadth, idempotency keys, and webhook coverage. Whether that gap matters depends on how central those are to the build.

• DX score: 6/10
• SDKs: None
• Idempotency keys: No
• Operating since: Not published
• Event stream: Yes
• Best published rate per 1,000: Tiers not published in comparable form
• Webhooks: No
• Deliverability: Not a sender. Warmup tools can create positive engagement signals, but they do not fix poor consent, bad lists, weak authentication, or irrelevant content.
• Free tier: 7-day trial, no credit card, 1 mailbox, 15 to 50 seed emails/day

Not a sender. Warmup tools can create positive engagement signals, but they do not fix poor consent, bad lists, weak authentication, or irrelevant content.

Outbound teams evaluating a warmup workflow before scaling sender accounts.

Teams with poor list quality or authentication problems that need root-cause fixes first.