Best AI agents for writing and managing email (2026)
Assistants that draft replies, sort your inbox and follow up so email takes less of your day. We list 37 tools for writing and managing email below, each with a link-checked page, pricing as the maker states it and alternatives.
Updated
37 tools: 12 open source, 15 free or freemium, 7 paid, usage-based or enterprise, 3 pricing on the maker's site.
Cumora
Cumora is a team chat app where AI agents are members of the workspace rather than a chat box you prompt. Each agent gets a persona, its own private memory and files, a status, and a schedule on which it wakes up, reads the room and decides whether to message someone, post an idea or pull a small group together. Agents can message each other, and you can read those side conversations. People join by email or link, agents can be grouped into teams and given projects, and the same live workspace runs on desktop, in the browser and on a phone. It is free during an invite-only preview.
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Tel-Agent
A self-hosted AI agent that answers phone calls and handles support on WhatsApp, Telegram, web chat and email with your own models and keys.
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Caspian
An open-source communication SDK that lets AI agents send and receive messages over email, WhatsApp, Slack, Discord and other channels.
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Bops
Bops, from Orgo, is a Mac app for a team of AI bots that handle business ops such as inbox triage, CRM follow-ups, invoices and reports, each with its own cloud computer, email address, phone number and shared memory.
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Sentio
Sentio, from Truespar, is a self-hosted email inbox API for AI agents: a Rust SMTP server that gives each agent a real address, delivers inbound mail as authenticated webhooks and lets agents reply in-thread over REST, with multi-tenant isolation.
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CosVoice
CosVoice gives the AI assistant you already use (Grok Bot, ChatGPT, Claude, Cursor or any MCP client) a real US phone number in your area code and its own email address. It places and answers calls for you, such as booking a table or taking a contractor's quote, then sends a written summary and transcript to your inbox; connect it through its open-source (MIT) MCP server.
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Robylon
Robylon builds AI customer-support agents that resolve tickets across email, chat, voice and WhatsApp, connect to helpdesks like Zendesk, Freshdesk and Intercom, take actions such as refunds and order updates, and hand hard cases to a person.
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RoverLead
RoverLead is an AI SDR for LinkedIn. Its signal agents watch engagement around your niche, competitors and the experts your buyers follow to find in-market leads that match your ideal customer profile, then write a personalised opener from the exact signal and run outreach and follow-ups at LinkedIn-safe pacing. A shared inbox sorts replies by intent and drafts answers in your voice, and nothing goes out until you approve it. Connects to your CRM and to Claude or ChatGPT through MCP.
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SEAL
SEAL is an MCP server (npx sealnet-mcp) that lets AI agents send and request files and secrets with end-to-end encryption. After pairing, the default delivery route sends the file to the user's SEAL inbox and returns a handle to the model. Also has a browser app, CLI and SDK; free up to 1 GB per seal.
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Macro
Team workspace that links email, chat, docs, tasks, calls and CRM with agents that share one team memory.
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MailVeri MCP
Open-source MCP server that lets AI agents and coding assistants verify single emails and bulk email lists through the MailVeri API, with SMTP, catch-all, disposable and role-account detection.
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Sentience
Personal AI that builds a private memory from your email, meetings, messages and screen and acts as your digital twin, drafting and answering in your voice.
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Novu
Open-source communication infrastructure that gives products and AI agents one API to reach users over in-app inbox, email, SMS, push, Slack, Teams and chat.
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Inbox Zero
AI email assistant that organizes your inbox, pre-drafts replies and manages your calendar, chat-controllable from Slack or Telegram.
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TUIOS
Terminal window manager with tiling panes, persistent sessions and one inbox where coding agents report their state and message each other.
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Google Workspace MCP
MCP server and CLI that gives AI assistants natural-language control of Gmail, Calendar, Drive, Docs, Sheets, Slides, Forms, Tasks and Chat.
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OpenOutreach
Self-hosted AI agent for B2B lead generation that finds people matching your market, explains the fit and emails them from your mailbox.
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CORE
Always-on personal AI that builds a memory graph from your email, meetings and tools, then plans and runs tasks like opening a pull request.
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Atomic Mail
Email API that gives AI agents their own inboxes, built on JMAP with MCP and agent skill support.
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Bird MCP
Bird's MCP server for sending and receiving email, SMS, WhatsApp and voice messages from AI agents through one API.
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SendPulse MCP
SendPulse's MCP server for driving its email, CRM, chatbot, SMTP and course automation from AI agents.
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Blockit
AI scheduling agent you CC on email or Slack threads to negotiate times across time zones and send invites.
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Hello Retail MCP
Hello Retail's MCP server for setting up and tuning e-commerce search, recommendations, email and product agents.
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Instinct
Personal assistant you text or call that works across your Gmail, calendar, documents and a cloud browser to get tasks done.
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Kajabi MCP
Kajabi's MCP server for managing products, pages, contacts, offers, emails and analytics from any MCP client.
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OneSignal MCP
OneSignal's official hosted MCP server for managing users, segments, templates, push and email messages and analytics from AI clients.
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remio
Personal AI assistant that captures web pages, meetings, emails and files and answers with context from your work.
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RocketReach MCP
RocketReach's MCP server for looking up verified work emails and phone numbers from its contact database.
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Shortwave
AI email client with an agent that organizes, writes, searches and schedules from a prompt.
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Unlayer MCP
Unlayer's MCP server for generating and editing email, page and PDF document templates.
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Google Workspace CLI
Official Google Workspace command-line tool for Drive, Gmail, Calendar, Docs and more, usable by agents.
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AgentSDR
Open-source AI SDR that runs email, LinkedIn and WhatsApp outreach and sorts replies in a built-in CRM.
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AI Emaily
AI-native email client whose assistant triages, drafts replies in your voice, schedules and sends.
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Artisan
AI employees for sales, led by Ava, an outbound SDR agent that finds leads, writes emails and books meetings.
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BetterClaw
Build and deploy AI agents without code on 28+ model providers or local LLMs, with 120+ app connectors, any MCP server and unlimited skills, running in Telegram, Slack, Discord and Gmail.
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Hiver
Customer service helpdesk in Gmail with AI agents.
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Lindy
No-code AI assistants for email, meetings and ops.
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GitHub repos (19)
| Repo | GitHub stars | Licence | Last push |
|---|---|---|---|
| Novu ↗ | 40,164 | — | 2026-10-21 |
| Google Workspace CLI ↗ | 31,557 | Apache License 2.0 | 2026-03-31 |
| Inbox Zero ↗ | 12,609 | GNU Affero General Public License v3.0 | 2026-10-21 |
| TUIOS ↗ | 5,467 | — | 2026-10-21 |
| Macro ↗ | 4,746 | — | 2026-10-21 |
| Cumora ↗ | 4,005 | — | — |
| Google Workspace MCP ↗ | 3,361 | — | 2026-10-20 |
| OpenOutreach ↗ | 3,323 | — | 2026-10-20 |
| CORE ↗ | 1,999 | — | 2026-09-07 |
| Tel-Agent ↗ | 1,144 | — | 2026-10-08 |
| Caspian ↗ | 973 | — | 2026-08-25 |
| Bops ↗ | 326 | — | 2026-10-21 |
| Atomic Mail ↗ | 266 | — | 2026-09-27 |
| Sentio ↗ | 255 | — | 2026-10-17 |
| AgentSDR ↗ | 43 | — | 2026-10-21 |
Top 15 of 19 by stars. Stars and licence come from each repo, checked when the listing was last verified.
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