Best AI Email Tools (2026)

Plunk

Email

Send transactional emails, run marketing campaigns, and automate workflows — all open-source and self-hostable. $0.001/email, no contact limits.

Cora

Email

Cora is your $150,000 chief of staff that only costs $20 per month. It screens your inbox, drafts responses in your voice, and briefs you on the rest twice daily.

Nitrosend

Email

Transactional email, flows and on-brand newsletters from Claude, ChatGPT, Codex or any AI agent. An AI that does your email marketing - free to start.

Exo

Email

An open source, AI-native desktop email client. Every email gets analyzed, prioritized, and drafted before you open it.

Odo

Email

Imagine hiring an assistant for your emails. Odo flags what needs your attention, writes drafts in your own style, and can do any task that you do with your inbox.

Sutro

Email

The email client where your agents work alongside you. Connect Claude, OpenClaw, or any agent — they read, draft, and act right in your inbox.

Lumbox

Email

Email infrastructure for AI agents. Inboxes, OTP extraction, send and reply, encrypted credential vault, browser automation. One API. Free to start.

AI Inbx

Email

Purpose-built email infrastructure for AI agents. Send and receive emails with smart contextual threading, webhook support, and seamless API integration. Free during beta.

AutoSend

Email

AutoSend is a lightweight SendGrid alternative for transactional and marketing emails. Simple, modern, and built to scale.

inbound

Email

Complete email infrastructure for modern applications. Send transactional emails, receive inbound messages, and build AI email agents with our TypeScript SDK and webhook API.

Shortwave

Email

Agentic AI that helps you organize, write, search, schedule, and more with just a prompt

Warmy

Email

The most advanced email deliverability tool with an AI-driven algorithm to make your email channel reliable. Explore Warmy now!

new.email

Email

Get access to the new way to build emails.

Fyxer AI Executive Assistant

Email

Fyxer AI Executive Assistant helps you manage your emails and meetings efficiently, saving you time every day. It drafts responses in your tone and takes meeting notes, ensuring you stay organized and productive.