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Sintra alternatives · AI Agents

Open-source alternatives to Sintra

Sintra is not described as open source on its own site. 40 of the 178 other AI agents in this directory are open source, according to their own sites.

Sintra is a paid product, starting at $52 per month on the 12-month plan, before the discount shown on site. 37 of them are free or have a free plan.

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

The 12 closest to Sintra

  1. AutoGPT

    Open-source agent platform with a hosted team of AI Experts

    • AutoGPT starts at $42.50 per month, billed yearly at $510 (Pro); $50 billed monthly. Sintra starts at $52 per month on the 12-month plan, before the discount shown on site.
    • AutoGPT has a free plan. Sintra does not.
    • Only Sintra lists iOS and Android apps.
    • AutoGPT is open source and self-hostable, according to its own site.
    AutoGPT vs SintraAutoGPT pricing and details

  2. OpenClaw

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

    • OpenClaw is free. Sintra starts at $52 per month on the 12-month plan, before the discount shown on site.
    • OpenClaw has a free plan. Sintra does not.
    • Only OpenClaw lists macOS, Windows and Linux apps.
    • OpenClaw is open source and self-hostable, according to its own site.
    OpenClaw pricing and details

  3. 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. Sintra starts at $52 per month on the 12-month plan, before the discount shown on site.
    • Hermes Agent has a free plan. Sintra does not.
    • Only Hermes Agent lists macOS, Windows and Linux apps.
    • Only Sintra lists iOS and Android apps.
    Hermes Agent pricing and details

  4. NanoClaw

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

    • NanoClaw is free. Sintra starts at $52 per month on the 12-month plan, before the discount shown on site.
    • NanoClaw has a free plan. Sintra does not.
    • Only NanoClaw lists macOS, Linux and Windows apps.
    • Only Sintra lists a web app.
    NanoClaw pricing and details

  5. Vellum

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

    • Vellum starts at $30 per month (Mighty). Sintra starts at $52 per month on the 12-month plan, before the discount shown on site.
    • Vellum has a free plan. Sintra does not.
    • Only Vellum lists macOS and Windows apps.
    • Only Vellum lists a browser extension.
    Vellum pricing and details

  6. Dify

    Open-source platform for building AI agents and agentic workflows

    • Dify starts at $590 per workspace / year (Professional); $59 billed monthly. Sintra starts at $52 per month on the 12-month plan, before the discount shown on site.
    • Dify has a free plan. Sintra does not.
    • Only Sintra lists iOS and Android apps.
    • Dify is open source and self-hostable, according to its own site.
    Dify pricing and details

  7. 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. Sintra starts at $52 per month on the 12-month plan, before the discount shown on site.
    • Kortix has a free plan. Sintra does not.
    • Only Kortix lists macOS, Windows and Linux apps.
    • Kortix is open source and self-hostable, according to its own site.
    Kortix pricing and details

  8. Eigent

    Open-source desktop app for working alongside AI agents

    • Eigent starts at $19.99 per month (Plus); $199.90 billed yearly. Sintra starts at $52 per month on the 12-month plan, before the discount shown on site.
    • Eigent has a free plan. Sintra does not.
    • Only Eigent lists macOS, Windows and Linux apps.
    • Only Sintra lists a web app.
    Eigent pricing and details

  9. goose

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

    • goose is free. Sintra starts at $52 per month on the 12-month plan, before the discount shown on site.
    • goose has a free plan. Sintra does not.
    • Only goose lists macOS, Windows and Linux apps.
    • Only Sintra lists a web app.
    goose pricing and details

  10. LobeHub

    Workspace for building and running teams of AI agents

    • LobeHub starts at $18 per month, billed yearly ($216); $20 billed monthly. Sintra starts at $52 per month on the 12-month plan, before the discount shown on site.
    • LobeHub has a free plan. Sintra does not.
    • Only LobeHub lists macOS, Windows and Linux apps.
    • LobeHub is open source and self-hostable, according to its own site.
    LobeHub pricing and details

  11. Sim

    Open-source workspace for building and running AI agents

    • Sim starts at $21.25 per user / month, billed annually ($255); $25 billed monthly. Sintra starts at $52 per month on the 12-month plan, before the discount shown on site.
    • Sim has a free plan. Sintra does not.
    • Only Sim lists a macOS app.
    • Only Sintra lists iOS and Android apps.
    Sim pricing and details

  12. Agenta

    Open-source workspace for building team AI agents and automations

    • Agenta starts at $29 per month (Pro, unlimited users, 10,000 agent runs included). Sintra starts at $52 per month on the 12-month plan, before the discount shown on site.
    • Agenta has a free plan. Sintra does not.
    • Only Sintra lists iOS and Android apps.
    • Agenta is open source and self-hostable, according to its own site.
    Agenta pricing and details

28 more that are open source

All 40 in one table

Common questions

Is there an open-source alternative to Sintra?

Yes. AutoGPT, OpenClaw, Hermes Agent, NanoClaw, Vellum, Dify, Kortix, Eigent and 32 more are open source, according to their own sites.

Is Sintra open source?

Sintra is not described as open source on its own site. The listing was checked on Oct 5, 2026 against the pages it cites.

Which of these AI agents are free?

AutoGPT, OpenClaw, Hermes Agent, NanoClaw, Vellum, Dify, Kortix, Eigent and 29 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 Sintra: the alternatives its listing names first, then the tools that share the most features with it.