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Sierra alternatives · AI Agents

Sierra alternatives with a Windows app

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

Sierra's current pricing could not be confirmed from its own site. 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 Sierra

  1. Thunai

    AI voice, chat and email agents plus live assist for contact centers

    • Only Thunai lists macOS and Windows apps.
    • Thunai also covers workflow automation.
    • Sierra also covers chatbots.
    Thunai vs SierraThunai pricing and details

  2. Devin

    Autonomous software engineer that runs in the cloud or locally

    • Devin has a free plan. Sierra does not.
    • Only Devin lists macOS, Windows and Linux apps.
    • Sierra also covers AI support agent and chatbots.
    Devin pricing and details

  3. Factory

    Coding agents called Droids for desktop, terminal and web

    • Factory has a free plan. Sierra does not.
    • Only Factory lists macOS, Windows and Linux apps.
    • Factory also covers workflow automation.
    • Sierra also covers AI support agent and chatbots.
    Factory pricing and details

  4. Amp

    Coding agent that runs in cloud machines it calls orbs

    • Amp has a free plan. Sierra does not.
    • Only Amp lists macOS, Windows, Linux, iOS and Android apps.
    • Amp also covers workflow automation.
    • Sierra also covers AI support agent and chatbots.
    Amp pricing and details

  5. Fellou

    Browser with built-in agents for research and web tasks

    • Fellou has a free plan. Sierra does not.
    • Only Fellou lists macOS and Windows apps.
    • Only Sierra lists a web app.
    • Fellou also covers workflow automation, research and web browser.
    Fellou pricing and details

  6. Cosine

    Coding agent for terminal, desktop and cloud, with sovereign models

    • Only Cosine lists macOS, Windows and Linux apps.
    • Cosine also covers workflow automation.
    • Sierra also covers AI support agent and chatbots.
    Cosine pricing and details

  7. Open Interpreter

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

    • Open Interpreter has a free plan. Sierra does not.
    • Only Open Interpreter lists macOS, Windows and Linux apps.
    • Only Sierra lists a web app.
    • Open Interpreter is open source, according to its own site.
    Open Interpreter pricing and details

  8. Manus

    General AI agent for research, slides, websites and browser tasks

    • Manus has a free plan. Sierra does not.
    • Only Manus lists macOS, Windows, iOS and Android apps.
    • Only Manus lists a browser extension.
    • Manus also covers app builder, research and presentations.
    Manus pricing and details

  9. OpenClaw

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

    • OpenClaw has a free plan. Sierra does not.
    • Only OpenClaw lists macOS, Windows, Linux, iOS and Android apps.
    • OpenClaw is open source and self-hostable, according to its own site.
    • OpenClaw also covers chat assistant and workflow automation.
    OpenClaw pricing and details

  10. Genspark

    AI workspace with an agent for research, slides, sheets and docs

    • Genspark has a free plan. Sierra does not.
    • Only Genspark lists macOS, Windows, Linux, iOS and Android apps.
    • Only Genspark lists a browser extension.
    • Genspark also covers meeting notes, chat assistant, research, documents, spreadsheets and presentations.
    Genspark pricing and details

  11. Hermes Agent

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

    • Hermes Agent has a free plan. Sierra does not.
    • Only Hermes Agent lists macOS, Windows and Linux apps.
    • Hermes Agent is open source and self-hostable, according to its own site.
    • Hermes Agent also covers chat assistant and workflow automation.
    Hermes Agent pricing and details

  12. Skywork

    AI workspace agent that produces slides, docs, sheets and websites

    • Skywork has a free plan. Sierra does not.
    • Only Skywork lists Windows, iOS and Android apps.
    • Skywork also covers transcription, research, documents, spreadsheets and presentations.
    • Sierra also covers AI support agent and chatbots.
    Skywork pricing and details

19 more that list a Windows app

All 31 in one table

Common questions

Which Sierra alternatives have a Windows app?

Thunai, Devin, Factory, Amp, Fellou, Cosine, Open Interpreter, Manus and 23 more list a Windows app.

Does Sierra have a Windows app?

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

Which of these AI agents are free?

Devin, Factory, Amp, Fellou, Open Interpreter, Manus, OpenClaw, Genspark 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 Sierra: the alternatives its listing names first, then the tools that share the most features with it.