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Alternatives

Products that do what SideAgent does

Open source AI sidebar with MCP & Skills support.

  1. 1

    Browser-based AI agents - unlimited runs, fixed cost

    2025

  2. 2

    Fast, focused AI in the browser sidebar

    2025

  3. 3
    WebBrain117

    The sidebar agent for the rest of us

    25d ago · webbrain.one

  4. 4

    Supercharge productivity in your browser with Gemini AI

    2024

  5. 5

    Open-source browser automation for local AI agents

    May 2026 · github.com

  6. 6
    mcp-use581

    Open source SDK and infra for MCP servers & agents

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  7. 7
    TwinMind514

    AI sidebar that listens, sees tabs, and helps proactively

    2024

  8. 8

    Free ChatGPT alternative that works as a Chrome extension

    2023

  9. 9

    Power your AI agents with enterprise-ready tools via MCP

    Oct 2025

  10. 10
    skills.sh322

    The Open Agent Skills Ecosystem

    Jan 2026 · skills.sh

  11. 11PA

    Title: Show HN: PageAgent, A GUI agent that lives inside your web app Hi HN, I'm building PageAgent, an open-source (MIT) library that embeds an AI agent directly into your frontend. I built this because I believe there's a massive design space for deploying general agents natively inside the web apps we already use, rather than treating the web merely as a dumb target for isolated bots. Currently, most AI agents operate from external clients or server-side programs, effectively leaving web development out of the AI ecosystem. I'm experimenting with an "inside-out" paradigm instead. By…

    Mar 2026 · alibaba.github.io

  12. 12OA
  13. 13AW

    Hey HN, I'm excited to share BrowserBee, a privacy-first AI assistant in your browser that allows you to run and automate tasks using your LLM of choice (currently supports Anthropic, OpenAI, Gemini, and Ollama). Short demo here: https://github.com/user-attachments/assets/209c7042-6d54-4fc... Inspired by projects like Browser Use and Playwright MCP, its main advantage is the browser extension form factor which makes it more convenient for day to day use, especially for less technical users. Its also a bit less cumbersome to use on websites that require you to be…

    2025 · github.com

  14. 14

    Easily build AI agents that connect to any service, no-code

    2025

  15. 15

    Open-source pull requests AI agent

    2023

  16. 16

    Open-source MCP bridge for Blender AI workflows

    21d ago · github.com

  17. 17

    A bridge connecting AI agents to the live web

    May 2026 · kimi.ai

  18. 18

    Open-source Computer Use MCP for AI agents

    May 2026 · github.com

  19. 19

    Open standard for AI Agent2Agent collaboration

    2025

  20. 20

    Hey HN. http://peerd.ai is an AI agent harness that lives entirely in your browser as a web extension. You don’t have to install a separate “AI browser”. You don’t have to bolt on or run some external process or manage a clunky mcp integration. It’s just a fully contained web extension, written in no build vanilla JS with minimal non-browser dependencies, using your own provider keys, and Apache 2. This isn’t just a fun hack. While it has largely been a solo side project, I genuinely believe the browser and the web could be the most natural platform for AI agents to operate safely,…

    Jun 2026 · github.com

  21. 21

    Chrome extension allow the user to communicate with the AI

    Sep 2025

  22. 22

    AI-assistant native self-hosted deployment platform

    Apr 2026 · openberth.io

  23. 23AJ

    Hi HN! I’m Tony, co-founder of Inngest. I wanted to share AgentKit, our Typescript multi-agent library we’ve been cooking and testing with some early users in prod for months. Although OpenAI’s Agents SDK has been launched since, we think an Agent framework should offer more deterministic and flexible routing, work with multiple model providers, embrace MCP (for rich tooling), and support the unstoppable and growing community of TypeScript AI developers by enabling a smooth transition to production use cases. This is why we are building AgentKit, and we’re really excited about it for a few…

    2025 · github.com

  24. 24

    Open-source AI browser agent that runs any model you choose

    Jul 2026 · opensidekick.app

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