Running many agents in parallel tools for building multi-agent systems
Tools for running several agents at once and reviewing what each hands back. Of the 102 tools on our building multi-agent systems page, 12 fit this narrower job. By pricing: 8 open source, 2 source-available, 1 free or freemium, 1 pricing on the maker's site. The most-starred open repos here are Ruflo (79,669 stars), Oh My Claudecode (40,313 stars), Paseo (22,192 stars). Most come from the coding (8), browser/computer use (2), frameworks (1) categories.
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Ruflo
Open-source multi-agent meta-harness for Claude Code, Codex, and MCP clients; Oct 13 release adds Mods (mission workflows) and a single control plane with human approval.
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Oh My Claudecode
Multi-agent orchestration layer for Claude Code that coordinates teams of specialized agents.
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Paseo
Orchestrate multiple coding agents from desktop and mobile.
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Superset
Agentic IDE for orchestrating many coding agents in parallel.
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Cc Haha
Claude Code / AI Agent ： Agent 、Git Worktree、 Diff、 、 、Computer Use、 ； 、 、 H5 。 Local-first Claude Code / AI Agent desktop workspace: multi-agent teams, Git worktrees, diffs, skills marketplace.
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Agent Orchestrator
Runs and supervises teams of coding agents from planning to merge.
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ZCode
ZCode is Z.ai's open-source AI coding workspace and official harness for GLM-5.3, with a desktop app, web interface and terminal agent that run multiple agents on long goals, plus control from WeChat, Feishu or Telegram.
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golutra
Multi-agent workspace that turns Codex, Claude Code and OpenClaw CLIs into one orchestrated team with parallel execution and task tracking.
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Maestro
Command center for orchestrating multiple coding agents.
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LayerFS
LayerFS is a filesystem built for running many coding agents in parallel. Each agent mounts a complete, writable workspace on top of shared committed history, does its work, commits what it changed and goes away, so compute only exists while a command runs. Every tool call becomes a commit on a branch, same-file clashes between agents are refused rather than silently merged, each line records the step that wrote it, and any commit can be forked at no cost for recursive exploration or RL training. Agents on different computers share one serverless store with chunk-level deduplication.
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OpenSwarm
AI-first 'operating system' where swarms of agents run apps and browsers in parallel.
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Vicoa
Vicoa is an agent-native IDE for running Claude Code, Codex, Gemini and 40+ other coding agents in parallel, each on its own git worktree, from desktop, web or phone, with notifications when an agent needs you.
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GitHub repos (12)
| Repo | GitHub stars | Licence | Last push |
|---|---|---|---|
| Ruflo ↗ | 79,669 | MIT | 2026-10-27 |
| Oh My Claudecode ↗ | 40,313 | MIT | 2026-10-27 |
| Paseo ↗ | 22,192 | Apache-2.0 (third-party components under their own licences) | 2026-10-27 |
| Superset ↗ | 15,624 | Elastic License 2.0 (source-available) | 2026-10-27 |
| Cc Haha ↗ | 15,216 | — | — |
| Agent Orchestrator ↗ | 13,750 | Apache License 2.0 | 2026-10-27 |
| ZCode ↗ | 8,303 | — | 2026-10-20 |
| golutra ↗ | 3,862 | — | 2026-05-12 |
| Maestro ↗ | 3,506 | GNU AGPL v3.0 | 2026-10-27 |
| LayerFS ↗ | 2,311 | — | 2026-10-27 |
| OpenSwarm ↗ | 830 | — | 2026-10-03 |
| Vicoa ↗ | 523 | — | 2026-10-10 |
12 repos. Stars and licence come from each repo, checked when the listing was last verified.
FAQ
What are the best AI tools for building multi-agent systems focused on running many agents in parallel?
We list 12. The first three by GitHub stars and featured status are Ruflo: Open-source multi-agent meta-harness for Claude Code, Codex, and MCP clients; Oct 13 release adds Mods (mission workflows) and a single control plane with human approval.; Oh My Claudecode: Multi-agent orchestration layer for Claude Code that coordinates teams of specialized agents.; Paseo: Orchestrate multiple coding agents from desktop and mobile.
Are there free or open-source options?
Yes: 8 open source, 2 source-available, 1 free or freemium, 1 pricing on the maker's site. Pricing is as each maker states it.
More from building multi-agent systems
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