Hedwig

Hedwig is an open-source email campaign platform that manages B2B sequences from existing mailboxes via Claude Code or Codex.

Hedwig is an open-source tool that executes multi-step B2B email sequences using your own email accounts. It functions as an MCP server, allowing users to control campaigns, analyze performance, and manage contacts through plain language commands in Claude Code or Codex. The software connects to email providers via SMTP/IMAP or Microsoft 365, ensuring emails are sent directly through your own infrastructure rather than a third-party relay. Users can import contact lists, write sequences with variable fields, and set daily limits to manage sending volume. It automatically monitors replies, stops sequences upon response, and filters out bounces or out-of-office notifications. Additionally, it offers AI-driven reply drafting, where agents label incoming messages and write responses for human approval.

Hedwig at a glance

Best for: Marketer, Sales, Founder
Runs on: Web, Self-hosted
Pricing: Free; MIT licensed.
Released: September 2026
Category: AI productivity tool
Website: flyhedwig.com

Key features

Multi-step email sequence automation
Support for IMAP, SMTP, and Microsoft 365 connections
AI-powered reply labeling and draft generation
Automated bounce and out-of-office detection
Campaign analysis via Claude Code or Codex integration
Variable support with fallbacks for personalization
Daily sending limits and pacing control
Secure encryption of passwords and tokens at rest

Use it for

Sending multi-step B2B cold email campaigns
Managing email sequences directly from code assistants
Analyzing reply rates and mailbox performance
Drafting email responses with AI assistance
Tracking campaign metrics like opens, bounces, and replies

Companions

Tools that articles about Hedwig recommend using with it, each with its job.

Claude Code — Built to work with Claude Code.
Codex — Built to work with Codex.
Context7 — Provides up-to-date documentation for AI agents and code editors.
Superpowers — Brainstorm, plan and execute skills for bigger tasks.
Playwright MCP — Enables LLMs to interact with web pages using structured accessibility snapshots.
GitHub MCP Server — Reads pull requests, issues and code search on GitHub.

Alternatives to Hedwig

Himaya — Autonomous email protection with self-serve onboarding in minutes.
Apollo — Connects B2B data with AI agents that automate research and outreach.
Busymail — Connects to Gmail, Yahoo, or IMAP servers and surfaces critical messages automatically.
Shortwave — It uses advanced AI agents to organize, write, search, and automate your inbox.
Emilio — Sorts priority emails and drafts replies in your tone.
Instantly — Automates cold email campaigns at scale with high deliverability and AI support.
Inbox Zero — It organizes your inbox automatically and drafts replies in your voice.
lemlist — Centralized multichannel outreach and deliverability management.
Macro — Combines email, chat, tasks, docs, and CRM in one open source workspace with AI agents.
Knowledge Work Plugins — Customize Claude with company-specific tools, terminology, and processes.
Sybill — It automatically updates CRM fields and answers deal questions using past deal context.
Claire Mail — Combines mail, calendar, reminders and AI triage in one fast app for Mac and iPhone.

All Hedwig alternatives