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AI · alternatives · 2026

24 alternatives to Molten Mail

Ai Agent Email. Read & Draft ONLY. Never send/delete

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Prices are shown for the 1 we have checked on their own sites, 1 of them free or with a free tier.

  1. 1

    Let your agents read, send, and react to email autonomously

    Jun 2026 · atomicmail.ai · its alternatives →

  2. 2
    Upstream▲976

    The inbox designed for humans and agents

    Jun 2026 · upstream.do · its alternatives →

  3. 3
    Brew ▲900

    Like Claude design for email marketing

    May 2026 · brew.new · its alternatives →

  4. 4
    AgentMail▲275

    Email Inboxes for AI Agents

    Apr 2026 · agentmail.to · its alternatives →

  5. 5

    Clean Up Your Inbox In Minutes Newsletter management, AI automation, and email analytics. Inbox Zero is the open-source email app that puts you back in control of your inbox.

    2023 · getinboxzero.com · its alternatives →

  6. 6
    Unspam AI▲385

    See how your subscribers read your emails with our AI inbox

    2024 · unspam.email · its alternatives →

  7. 7
    Breakcold▲535

    Send cold emails with AI icebreakers that get replies

    2022 · breakcold.com · its alternatives →

  8. 8

    Supercharge your growth with AI-powered cold emails

    2023 · success.ai · its alternatives →

  9. 9
    Quartz▲270

    AI email client built for focus. Runs locally on your Mac

    Jun 2026 · quartzmail.ai · its alternatives →

  10. 10

    AI Agents & Email deliverability experts on your team

    Jul 2026 · mailadept.com · its alternatives →

  11. 11
    AI Emailyfree tier, from $14.99/mo▲165

    Your AI inbox that writes like you + replies on autopilot

    Jul 2026 · aiemaily.com · its alternatives →

  12. 12
    EzMail.AI▲115

    Reply to emails 10X faster with pre-filled drafts by AI

    2023 · its alternatives →

  13. 13

    AI-powered cold outreach platform

    2023 · outboundly.ai · its alternatives →

  14. 14AE

    Hey HN, we're Haakam, Michael, and Adi. We're building AgentMail (https://agentmail.to/), an API to give AI agents their own email inboxes. We’re not talking about AI for your email, this is email for your AI. We started building email agents because they can converse with users in their inboxes, automate email-based workflows, and authenticate with third-party applications. Given these unique capabilities, we think email will be a core interface for agents. But we were building on top of Gmail, which was a struggle: poor API support, expensive subscriptions, rate limits,…

    2025 · chat.agentmail.to · its alternatives →

  15. 15

    Win and keep customers with email automation your AI runs

    Jul 2026 · bangermail.com · its alternatives →

  16. 16
    Inbox AI▲201

    AI-Powered Personal Productivity

    2024 · its alternatives →

  17. 17

    Delos AI drafts your replies and organizes your emails

    Jan 2026 · delos.so · its alternatives →

  18. 18
    Nitrosend▲168

    Email for AI agents. They sign up, send and reply.

    Jul 2026 · nitrosend.com · its alternatives →

  19. 19

    Hi HN :) really excited to share this with you. The one thing AI reliably does is generate noise. Half the tools I see launch are just machines for producing more noise across more channels. And people are starting to see this in the form of emails in their inboxes as spam filters are struggling. There used to be a useful signal in email: the effort a sender put into customizing a message was a rough proxy for how relevant it actually was. AI killed that. Now it's customized slop with the appearance of effort with none of the cost. It is painful that the open internet / open channels…

    Jul 2026 · captchainbox.com · its alternatives →

  20. 20

    Give your AI agent its own verified email address — not access to yours. Send and receive via REST, SMTP, or MCP. Built for LangGraph, CrewAI, Mastra, Claude Code, Cursor. Human-in-the-loop approval, trust scores, GDPR-ready.

    Feb 2026 · mailmolt.com · its alternatives →

  21. 21

    The AI email writer that Google wishes they built

    2024 · chromewebstore.google.com · its alternatives →

  22. 22

    Private AI email with security, control, and MCP built in

    Jul 2026 · enginemail.io · its alternatives →

  23. 23

    Revolutionize emailing with AI customization with Free App

    2024 · arcade.now · its alternatives →

  24. 24

    Winning cold mailing campaigns

    2023 · its alternatives →

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Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →