Alternatives

Products that do what HAR does

Open Source harness for multi-agent coding workflows

1. 1
   Qwen3-Coder▲248

   A powerful open model for agentic coding tasks

   2025

2. 2
   Prime Agent▲164

   A coding agent that can refine its own harness

   27d ago · primeintellect.ai

3. 3
   AGENTS.md▲229

   A README, but for your AI coding agent

   2025

4. 4
   R2R▲135

   Deep Research Agents for Your Data, via API

   2025

5. 5
   Open Agents▲161

   Agents that ship real code

   Apr 2026

6. 6
   Coderrr▲96

   Open source CLI-first AI coding companion

   Jan 2026

7. 7
   SPECTRE▲124

   An agentic coding workflow for product builders

   Feb 2026

8. 8
   Anvil▲175

   Run a fleet of parallel Claude Codes

   Mar 2026

9. 9
   agor▲102

   Orchestrate multiple AI coding agents with your team

   Nov 2025

10. 10
    Keen Code▲125

    A context-efficient CLI coding agent built by agents

    Jun 2026

11. 11
    Korey Coding Agent Handoffs▲92

    Send your bugs and ideas to your favorite coding agents

    Dec 2025

12. 12
    Gauge▲111

    Agent Led Growth: Get written into every customer's codebase

    19d ago · withgauge.com

13. 13
    Mi▲75

    30-line zero-config CLI agent for bug fixes + refactoring

    May 2026

14. 14
    Qwen3.6-27B▲120

    The sweet-spot open dense model for coding agents

    Apr 2026

15. 15
    Remote OpenClaw▲81

    13,000+ MCP servers, skills & plugins for AI coding agents

    Jul 2026

16. 16
    Aviator Agents▲97

    An LLM framework for large scale code migrations

    2025

17. 17
    Heym▲54

    Build agentic systems. Run them with confidence

    27d ago · heym.run

18. 18
    Agent Orchestrator▲56

    Your coding agent fleet manager

    22d ago · aoagents.dev

19. 19CA
    Coding Agents swarming your codebase▲9

    I built this because I was tired of creating pull requests in 20 repositories just to change a single line of workflow job version. With Infra as AI, just mention the change. Agents work on all repos in parallel, read the docs, make a bunch of PRs and fill in the description. You can see the demo of the actual dashboard in the landing. Let me know your thoughts :) It means a lot to me!

    Sep 2025 · infrastructureas.ai

20. 20
    hax▲2

    A minimalist, terminal-native coding agent written in C

    8d ago · usehax.dev

21. 21HA
    HyperFlow – A self-improving agent framework built on LangGraph▲8

    Hi HN, I am Umer. I recently built an experimental framework called HyperFlow to explore the idea of self-improving AI agents. Usually, when an agent fails a task, we developers step in to manually tweak the prompt or adjust the code logic. I wanted to see if an agent could automate its own improvement loop. Built on LangChain and LangGraph, HyperFlow uses two agents: - A TaskAgent that solves the domain problem. - A MetaAgent that acts as the improver. The MetaAgent looks at the TaskAgent's evaluation logs, rewrites the underlying Python code, tools, and prompt files, and then tests the new…

    Apr 2026

22. 22
    Coordination Layer for Coding Agents▲9

    We built an open sourced coordination layer for AI agents working on the same repository. Detects work duplication and design conflicts early

    8d ago · twing.dev

23. 23MA
    Multi-Agent-Coder Is #12 on Stanford's TBench. Beats Claude Code▲5

    This weekend I built a multi-agent coding system which, quite unexpectedly, beat Claude Code on Stanford's Terminal Bench! The architecture is straightforward, consisting of an orchestrator agent that deploys explorer & coder subagents to complete complex terminal based tasks, utilising an intelligent context sharing mechanism along the way which makes it all work. The repo has a lot of technical details, and all the code and prompts for you to play around with if you'd like! I had a lot of fun making this, I hope you have fun reading the README, using it yourself, or even extending it! As…

    2025 · github.com

24. 24
    OpenHands Software Agent SDK▲21

    The open platform for cloud coding agents.

    Dec 2025

Ranked by how close each launch is in meaning, then by votes. Refine with a description →