Skip to content
ToolGPA

Letta alternatives · AI Agents

Letta alternatives with a Windows app

The Letta listing does not include a Windows app. 31 of the 178 other AI agents in this directory list a Windows app.

Letta has a free plan. Paid plans start at $20 per month. 25 of them are free or have a free plan.

31 tools · Listings checked up to Nov 13, 2026 · Where the facts come from

The 12 closest to Letta

  1. Hermes Agent

    Open-source AI agent with persistent memory and a messaging gateway

    • Hermes Agent starts at $20 per month for the optional Nous Portal Plus tier; the agent is free. Letta starts at $20 per month.
    • Only Hermes Agent lists macOS, Windows and Linux apps.
    • Hermes Agent is self-hostable, according to its own site.
    • Hermes Agent also covers chat assistant.
    Hermes Agent vs LettaHermes Agent pricing and details

  2. Kortix

    Open-source platform for running AI agents from a git repo you own

    • Kortix starts at $50 per month for 5,000 credits (Credits), with unlimited members. Letta starts at $20 per month.
    • Only Kortix lists macOS, Windows, Linux, iOS and Android apps.
    • Kortix is self-hostable, according to its own site.
    Kortix pricing and details

  3. goose

    Open-source AI agent with a desktop app, CLI and API

    • goose is free. Letta starts at $20 per month.
    • Only goose lists macOS, Windows and Linux apps.
    • Only Letta lists a web app.
    goose pricing and details

  4. Factory

    Coding agents called Droids for desktop, terminal and web

    • Factory starts at $20 per individual / month (billing basis not stated). Letta starts at $20 per month.
    • Only Factory lists macOS, Windows and Linux apps.
    • Letta is open source, according to its own site.
    Factory pricing and details

  5. Open Interpreter

    Open-source coding agent and desktop agent using your own model keys

    • Open Interpreter is free. Letta starts at $20 per month.
    • Only Open Interpreter lists macOS, Windows and Linux apps.
    • Only Letta lists a web app.
    • Letta also covers workflow automation.
    Open Interpreter pricing and details

  6. OpenClaw

    Open-source personal AI agent you run yourself and message in chat

    • OpenClaw is free. Letta starts at $20 per month.
    • Only OpenClaw lists macOS, Windows, Linux, iOS and Android apps.
    • OpenClaw is self-hostable, according to its own site.
    • OpenClaw also covers chat assistant.
    OpenClaw pricing and details

  7. Zo Computer

    Always-on personal cloud computer run by an AI agent

    • Zo Computer starts at $18 per month (Basic). Letta starts at $20 per month.
    • Letta has a free plan. Zo Computer does not, though it has a free trial.
    • Only Zo Computer lists macOS, Windows and Linux apps.
    • Letta is open source, according to its own site.
    Zo Computer pricing and details

  8. Simular Sai

    Computer-use agent that operates a cloud desktop or your own computer

    • Simular Sai starts at $50 per month (Pay as you go, includes 50,000 credits). Letta starts at $20 per month.
    • Only Simular Sai lists macOS and Windows apps.
    • Letta is open source, according to its own site.
    Simular Sai pricing and details

  9. NanoClaw

    Open-source personal AI agent that runs in containers you host

    • NanoClaw is free. Letta starts at $20 per month.
    • Only NanoClaw lists macOS, Linux and Windows apps.
    • Only Letta lists a web app.
    • NanoClaw is self-hostable, according to its own site.
    NanoClaw pricing and details

  10. Eigent

    Open-source desktop app for working alongside AI agents

    • Eigent starts at $19.99 per month (Plus); $199.90 billed yearly. Letta starts at $20 per month.
    • Only Eigent lists macOS, Windows and Linux apps.
    • Only Letta lists a web app.
    • Eigent is self-hostable, according to its own site.
    Eigent pricing and details

  11. Vellum

    Personal AI assistant with long-term memory that acts across apps

    • Vellum starts at $30 per month (Mighty). Letta starts at $20 per month.
    • Only Vellum lists macOS, Windows, iOS and Android apps.
    • Only Vellum lists a browser extension.
    • Vellum is self-hostable, according to its own site.
    Vellum pricing and details

  12. Langflow

    Open-source visual builder for AI agents and MCP servers

    • Only Langflow lists macOS, Windows and Linux apps.
    • Langflow is self-hostable, according to its own site.
    • Langflow also covers templates.
    • Letta also covers workflow automation.
    Langflow pricing and details

19 more that list a Windows app

All 31 in one table

Common questions

Which Letta alternatives have a Windows app?

Hermes Agent, Kortix, goose, Factory, Open Interpreter, OpenClaw, Zo Computer, Simular Sai and 23 more list a Windows app.

Does Letta have a Windows app?

The Letta listing does not include a Windows app. It lists Web.

Which of these AI agents are free?

Hermes Agent, Kortix, goose, Factory, Open Interpreter, OpenClaw, Simular Sai, NanoClaw and 17 more are free or have a free plan.

When was this checked?

Each listing shows its own date. On this page they run from Oct 5, 2026 to Nov 13, 2026. Vendors change prices and plans without notice, so confirm on their site before you buy.

This page is built from the listings. A tool is here because its listing says so, and the order is how close each is to Letta: the alternatives its listing names first, then the tools that share the most features with it.