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Alternatives

Products that do what OKBrain Harness does

AI Harness focused on owning the AI Stack

  1. 1

    Open-source unified interface for agent harnesses

    22d ago · harnessrouter.ai

  2. 2

    Composable agent harness where everything is a plugin

    24d ago · github.com

  3. 3AC

    Hi HN, I'm Zach, one of the co-founders of Adam (https://adam.new). We've been on HN twice before with text-to-CAD/3D experiments [1][2]. The honest takeaway from those threads: prompt-to-3D model web apps are fun, but serious mechanical engineers don't want a black box that spits out an STL. They want help inside the CAD tool they already use, with full visibility and control over the feature tree. So we built that. Adam is now a harness that integrates directly with your CAD. It reads your parts, understands the existing feature tree, and edits it for you agentically. We are…

    May 2026 · fusion.adam.new

  4. 4
    OpenHuman556

    An open source AI harness built with the human in mind

    May 2026 · tinyhumans.ai

  5. 5

    Bring the world's best AI agents into your app, with one API

    Jul 2026 · harnessrouter.ai

  6. 6
    Osaurus540

    Open source agents that run 100% locally on your Mac

    Jul 2026 · osaurus.ai

  7. 7

    Supercharge your tools. Embrace new freedom.

    2023

  8. 8BH

    Hey HN, We got tired of browser frameworks restricting the LLM, so we removed the framework and gave the LLM maximum freedom to do whatever it's trained on. We gave the harness the ability to self correct and add new tools if the LLM wants (is pre-trained on) that. Our Browser Use library is tens of thousands of lines of deterministic heuristics wrapping Chrome (CDP websocket). Element extractors, click helpers, target managemenet (SUPER painful), watchdogs (crash handling, file downloads, alerts), cross origin iframes (if you want to click on an element you have to switch the target first,…

    Apr 2026 · github.com

  9. 9

    Run and train AI models locally on your desktop

    26d ago · unsloth.ai

  10. 10
    Univa.ai123

    All-in-one startup platform to find jobs, mentors & more

    2020

  11. 11

    Your fully private, open-source, on-device AI assistant

    2025

  12. 12

    Build production agents with harness and sandbox

    Apr 2026 · openai.com

  13. 13KA

    Hi HN, we are excited to show you Klavis AI. It is an open source project and we provide hosted versions with API access as well. (Website: https://www.klavis.ai/, Github repo: https://github.com/Klavis-AI/klavis) We're addressing a couple of key problems with using MCPs. First, many available MCP servers lack native or used-based authentications, creating security vulnerabilities and adding complexity during development. Second, many MCP servers are personal projects, not designed for the reliability needed in production. Connecting to these servers…

    2025 · github.com

  14. 14SM

    We built a model router that plugs into coding agents (e.g. Claude Code, Codex, Cursor, etc.) and intelligently sends requests to the best model to serve them. Here's a quick demo of running it locally: https://www.youtube.com/watch?v=isKhAyivtfM. At Weave, we write most of our code with AI, and it's been getting more expensive. This came to a head when Opus 4.7 was released and, thanks to its tokenizer changes, our costs shot up. We knew we didn't need Opus for everything but we didn't want to lose out on the intelligence for the cases where you really need it. So we decided…

    Jun 2026 · github.com

  15. 15OS

    Hi I'm Dan from Elodin, making an open source real-time capable flight software simulation. For AI Grand Prix contestants, the wait for the Round 1 virtual qualifier simulation has been grueling. If you’re competing, check out our simulation harness to tide you over, built to match the published competition constraints and message format. It runs against real Betaflight, which we learned requires at least 1000 sensor samples per second to run real-time correctly. The competition warranted introducing a new feature to generate the camera sensor directly in the simulation loop. Typically…

    May 2026 · elodin.systems

  16. 16

    I think agent-first chat interfaces will be a primary software modality and busy dashboard/UI will go away. I’m not sure who exactly wins it, but I want my knowledge to grow/go with me. A lot of the “knowledge” ie research, analysis, reasoning will be done by agents as the primary user. Our current notes tools & tasks management systems were built for humans… I don’t care what the 17th thing on my bug backlog is. I want to conduct agents that can execute for me and do great work. What I built OzBrain to do: + Create a central place for agent reasoned knowledge to live + Be agnostic…

    16d ago · ozbrain.com

  17. 17
    Synapis126

    Build & deploy AI models online – no code or hardware needed

    2025

  18. 18

    Build and deploy web apps straight from ChatGPT/Claude

    Feb 2026 · vamah.ai

  19. 19

    Tiny apps for agents and humans

    Apr 2026 · harnessapps.com

  20. 20

    Observal is self-hosted registry for your coding agent extensions with a built in insight engine. Setup Observal, define the scope and share your Skills, MCPs and Agents with your peers. - Observal/Observal

    Jul 2026 · github.com

  21. 21GA

    Hey HN! Wanted to show our open source agent harness called Gambit. If you’re not familiar, agent harnesses are sort of like an operating system for an agent... they handle tool calling, planning, context window management, and don’t require as much developer orchestration. Normally you might see an agent orchestration framework pipeline like: compute -> compute -> compute -> LLM -> compute -> compute -> LLM we invert this so with an agent harness, it’s more like: LLM -> LLM -> LLM -> compute -> LLM -> LLM -> compute -> LLM Essentially you describe each agent in either a self contained…

    Jan 2026 · github.com

  22. 22

    No-code AI Lab: Train models, access datasets, run inference

    Feb 2026 · neuro-block.com

  23. 23

    Vibe-edit videos locally using Codex

    Mar 2026 · harness.gg

  24. 24

    The fastest way to connect your data with your AI Tools.

    12d ago · mcp-builder.ai

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