Anypost

Anypost is a transactional and broadcast email service reached through an API or plain SMTP, positioned against incumbent email providers primarily on price — as low as 8 cents per thousand messages, with a free tier of 3,000 a month.

The developer-facing detail is the interesting part. Messages can be authored in Markdown and rendered to HTML and plain text by the SDK, which removes the usual step of maintaining two versions of every template. SMTP is supported alongside HTTP so existing applications and off-the-shelf software can send without code changes, and one key authenticates both paths with identical event reporting.

SDKs cover TypeScript, Python, PHP, Ruby, Go, Rust, Java and C#, with tagging, tracking and webhooks on every send.