What is Acyclic?
Acyclic is an AI developer tool that runs coding tasks across multiple AI agents in parallel, each in its own sandbox, then merges their work into a single patch or pull request. Instead of waiting on one agent to grind through a large task sequentially, you create a "swarm" that splits the task across several coding agents working at once. You can drive it from the CLI (installed with npm install -g @acyclic-labs/cli) or from a web dashboard, upload a project for the agents to work on, and watch progress live with a --watch flag. Results consolidate automatically into one patch, and Acyclic can open a pull request directly from the output. It integrates coding agents over the Model Context Protocol (MCP), making it a fit for teams already running multiple Claude Code sessions or operating agent swarms in production. The company is Y Combinator-backed and the product is in early access, so the surface area is still narrow and centered on parallel execution and merge. For BestAIFor readers choosing a developer agent tool, Acyclic is the option focused specifically on fanning one task out to many agents and reconciling the results rather than on being a general coding copilot.
What is Acyclic used for?
Splitting large coding tasks across parallel sandboxed AI agents and merging their work into one patch or pull request.
How much does Acyclic cost?
Pros and cons
Pros
- Splits one coding task across multiple agents running in parallel, each in its own sandbox
- Automatically merges agent outputs into a single patch and can open a pull request
- Live progress monitoring via a
--watchflag - Both a CLI (
@acyclic-labs/cli) and a web dashboard for creating swarms - Connects coding agents over the Model Context Protocol (MCP)
Cons
- No pricing published; product is in early / invite-only access
- Narrow scope — built for parallel execution and merge, not general-purpose coding assistance
- Most useful if you already run multiple coding agents (e.g. Claude Code) on large codebases
- Early-stage maturity means limited track record and documentation
Questions about Acyclic
What is Acyclic used for?
Acyclic is used to run a single coding task across multiple AI agents in parallel. It creates a swarm that distributes the work across sandboxed agents and merges their outputs into one unified patch or pull request, so large tasks finish faster than with a single sequential agent.
How do you use Acyclic?
You can use Acyclic through its CLI, installed with `npm install -g @acyclic-labs/cli`, or through its web dashboard. You upload a project, start a swarm, watch agent progress live with the `--watch` flag, and let Acyclic merge the results and optionally open a pull request.
Does Acyclic work with Claude Code and MCP?
Yes. Acyclic connects coding agents over the Model Context Protocol (MCP) and is aimed at teams running multiple Claude Code sessions on large codebases, letting those agents work in parallel on one task.
Is Acyclic free?
Acyclic does not publish pricing and appears to be in early or invite-only access, so cost is arranged directly with the team rather than from a public plan.
What are the best alternatives to Acyclic?
Devin, OpenHands, and running multiple Claude Code sessions manually.
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