Skip to content
ToolGPA

Sierra alternatives · AI Agents

Free alternatives to Sierra

Sierra has no free plan. 58 of the 101 other AI agents in this directory are free or have a free plan.

Sierra's current pricing could not be confirmed from its own site. 4 of them have no paid plan at all; the rest pair a free plan with paid ones.

58 tools · Listings checked up to Nov 12, 2026 · Where the facts come from

The 12 closest to Sierra

  1. Yellow.ai

    Agentic AI platform for customer and employee service

    What is free: 1 AI agent, 500 chat sessions a month, then $0.99 per resolution, with limited features.

    • Yellow.ai has a free plan. Sierra does not.
    • Yellow.ai also covers workflow automation.
    Yellow.ai vs SierraYellow.ai pricing and details

  2. Botpress

    AI agent builder and helpdesk priced by conversation volume

    What is free: 100 conversations with no top-ups or overages, 3 seats, 3 AI agents and a Help Center.

    • Botpress has a free plan. Sierra does not.
    • Botpress also covers whatsApp messaging.
    Botpress pricing and details

  3. Devin

    Autonomous software engineer that runs in the cloud or locally

    What is free: a light quota to code with agents, limited model availability, unlimited inline edits and unlimited Tab completions.

    • 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

  4. Factory

    Coding agents called Droids for desktop, terminal and web

    What is free: Bring your own inference by signing in with ChatGPT, GitHub Copilot or OpenRouter, or by connecting your own API keys.

    • 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

  5. Jules

    Google's asynchronous coding agent that opens pull requests

    What is free: 15 tasks per day (rolling 24 hours), 3 concurrent tasks, Gemini 2.5 Pro.

    • Jules has a free plan. Sierra does not.
    • Jules also covers workflow automation.
    • Sierra also covers AI support agent and chatbots.
    Jules pricing and details

  6. Amp

    Coding agent that runs in cloud machines it calls orbs

    What is free: Hobby: no monthly fee, pay as you go for Amp-hosted orbs, unlimited self-hosted orbs, and your own model subscription or key.

    • 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

  7. Fellou

    Browser with built-in agents for research and web tasks

    What is free: a one-time bonus of 1,000 Sparks (about 4 tasks) and 2 scheduled 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

  8. Letta

    Stateful agents with long-term memory, from the MemGPT team

    What is free: Up to 3 stateful agents and 5 MiB per memory repository; bring your own API keys or an external coding plan.

    • Letta has a free plan. Sierra does not.
    • Letta is open source, according to its own site.
    • Letta also covers workflow automation.
    • Sierra also covers AI support agent and chatbots.
    Letta pricing and details

  9. Beam AI

    Agent platform for automating business processes at enterprises

    What is free: 20 tasks a month, 1 base integration and self-healing outputs.

    • Beam AI has a free plan. Sierra does not.
    • Beam AI also covers workflow automation and no-code.
    • Sierra also covers AI support agent and chatbots.
    Beam AI pricing and details

  10. Lyzr

    Enterprise agent platform with a free builder and custom plans

    What is free: Build plan: free forever, with no time limit on building and testing agents in Architect and Agent Studio.

    • Lyzr has a free plan. Sierra does not.
    • Lyzr is self-hostable, according to its own site.
    • Lyzr also covers workflow automation and no-code.
    • Sierra also covers AI support agent and chatbots.
    Lyzr pricing and details

  11. Wordware

    Build AI workflows and agents by writing them in plain English

    What is free: The product page offers a Start for free sign-up; its limits are not published on a page that could be read.

    • Wordware has a free plan. Sierra does not.
    • Wordware also covers workflow automation and no-code.
    • Sierra also covers AI support agent and chatbots.
    Wordware pricing and details

  12. Bardeen

    Lead scraping, enrichment and qualification with AI agents

    What is free: Every account gets 100 credits free; the pricing page does not say whether they refill each month.

    • Bardeen has a free plan. Sierra does not.
    • Bardeen also covers workflow automation and no-code.
    • Sierra also covers AI support agent and chatbots.
    Bardeen pricing and details

46 more that are free or have a free plan

All 58 in one table

Common questions

Is there a free alternative to Sierra?

Yes. Yellow.ai, Botpress, Devin, Factory, Jules, Amp, Fellou, Letta and 50 more are free or have a free plan.

Does Sierra have a free plan?

Sierra has no free plan. Sierra's current pricing could not be confirmed from its own site.

When was this checked?

Each listing shows its own date. On this page they run from Oct 5, 2026 to Nov 12, 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.