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I've been building voice AI agents for the past year, the kind that answer phone calls, book appointments, handle customer inquiries. It was going well until a client asked: "Can it also handle our email?"
Turns out, wiring an AI to a phone system is one thing. Wiring it to email is... a whole different mess. SMTP credentials, MIME parsing, threading headers (References, In-Reply-To), bounce handling, deliverability reputation. I spent two weeks on plumbing before my agent could read its first email.
That's when it hit me: every developer building AI agents is going to hit this exact wall. So I built AIThreads [1], the email infrastructure layer so you can skip the plumbing and get straight to the AI logic.
How it works:
Instant inboxes: Create support@yourorg.aithreads.io via API.
No DNS, no verification, just works. (unless you are adding your own domain)
Webhooks -> Email arrives → we POST parsed JSON to your endpoint → your agent decides what to do. Send via API -> Agent composes reply, calls our API, we deliver with proper threading so conversations stay grouped. Knowledge Base (RAG) -> Upload your docs, we embed them. Query for relevant context before generating replies. Smart escalation -> Sentiment analysis and priority detection built-in. AI knows when a frustrated customer needs a human. InBuilt Tools -> Pre-Built tools to manage the emails.
Try it now: Email hey@aithreads.io – our demo agent will reply.
