Koltrix

Key facts: Koltrix launched on Product Hunt on November 4, 2026 as an AI team inbox and email API for SaaS teams. It is a fast shared inbox on your own domain: give each AI agent its own address and decide what it may do, connect Claude, ChatGPT, Cursor or Claude Code through MCP, and the assistant drafts while nothing is sent until you say yes. It also covers the email API and SMTP relay for your product, with SPF, DKIM and DMARC.

Plans: 7-day free trial, with no card required. Check the official site for current plan prices.

Best for: SaaS teams who want agents working in the inbox without losing control of what gets sent. Who should skip it: anyone who only needs a personal mailbox.

Pros

• A shared inbox on your own domain, with agents given their own addresses and permissions
• Connects Claude, ChatGPT, Cursor and Claude Code through MCP
• Nothing is sent until a person approves it
• Email API and SMTP relay included, with SPF, DKIM and DMARC

Watch out for

• Paid plan prices are not stated on the homepage: check the official site
• A new launch, so agent judgement in the inbox needs a human check
• Your domain is set up in about 10 minutes, which still needs DNS access

Best for

SaaS teams who want agents working in the inbox without losing control of what gets sent. Who should skip it: anyone who only needs a personal mailbox, or a team that will not give agents email addresses.

Pricing

7-day free trial, no card required. Check the official site for current plan prices.

FAQs

What is Koltrix? An AI team inbox and email API for SaaS teams: a shared inbox on your own domain, run by agents you control.

Can agents send email by themselves? No. The assistant drafts, and nothing is sent until you say yes.

Which AI tools connect to it? Claude, ChatGPT, Cursor and Claude Code, through MCP.

Is there a free trial? Yes, a 7-day free trial with no card required.