Self-hosted apps that integrate with Email (IMAP/SMTP)

5 open-source, self-hostable projects list Email (IMAP/SMTP) as an integration.

• MachinaOSSelf-hosted open-source AI organisation with six specialised employees owning business functions end-to-end. Token budget, bring your own model keys.
• MulmoClaudeSelf-hosted AI assistant platform with personal wiki, collections, and messaging bridges — powered by Claude Code, data stays local.
• sapphireSapphire Blue AI is a self-hosted, open-source AI companion with voice, memory, personas, and plugins. Runs locally with optional cloud LLMs.
• taOStaOS is a self-hosted AI agent OS turning your hardware into a distributed compute cluster with a web desktop, multi-framework agents, offline memory, and 100+ apps.
• OwlySelf-hosted AI support agent unifying WhatsApp, Email, and Phone with cross-channel identity, knowledge base, automation, and tickets.