# OpenWOP vs CrewAI

> Source: https://openwop.dev/comparisons/crewai/ · OpenWOP, the open-source protocol for multi-agent workflow orchestration.

CrewAI is a Python framework for describing teams of role-playing agents; OpenWOP is an open protocol that defines how a host exposes a durable, interruptible, replayable run of whatever agents it hosts. If you want a multi-agent prototype in Python quickly, with a large community and a managed platform, CrewAI is the better fit.

Checked 4 October 2026. Figures for CrewAI come from its own docs, repository and pricing page.

## At a glance

| Property | OpenWOP | CrewAI |
|---|---|---|
| What it is | A wire protocol (REST and Server-Sent Events) plus a conformance suite | A Python framework plus a commercial platform, CrewAI AMP ([docs](https://docs.crewai.com/en/introduction)) |
| Licence | Spec CC BY 4.0, code Apache 2.0 | MIT ([licence](https://raw.githubusercontent.com/crewAIInc/crewAI/main/LICENSE)) |
| Languages | Any language that speaks HTTP; SDKs for TypeScript, Python and Go | Python ([PyPI](https://pypi.org/pypi/crewai/json)) |
| Where state lives | An append-only event log per run ([events](https://openwop.dev/spec/v2/core/events.html)) | Flow state, persisted to SQLite with `@persist` ([flows](https://docs.crewai.com/en/concepts/flows)) |
| Human approval | Interrupts resumed by token ([interrupt](https://openwop.dev/spec/v2/core/interrupt.html)) | `human_input`, `@human_feedback`, and approvals by email or webhook on AMP ([docs](https://docs-platform.crewai.com/platform/en/guides/human-in-the-loop)) |
| Replay | Fork any run from any event ([replay](https://openwop.dev/spec/v2/core/replay.html)) | Replay from a chosen task of the latest kickoff ([docs](https://docs.crewai.com/en/learn/replay-tasks-from-latest-crew-kickoff)) |
| A2A and MCP | Both, negotiated per host ([interop](https://openwop.dev/spec/v2/core/interop.html)) | A2A client and server, MCP client ([A2A](https://docs.crewai.com/en/learn/a2a-agent-delegation), [MCP](https://docs.crewai.com/en/mcp/overview)) |
| Spec other runtimes implement | Yes, with a public conformance suite | We found none |
| Adoption | New: the spec repo started in May 2026 | About 59,300 GitHub stars |

## When to choose CrewAI

- You want to describe agents by role, goal and task in Python and get something running fast.
- You want a managed platform with a visual editor, tracing and approvals out of the box.
- You value a large community and plenty of examples.

## When OpenWOP fits

- You need runs to behave the same across hosts or vendors, with approval, replay and fork defined by a contract.
- You are building a runtime and want any compatible client to work with it.
- You want a conformance suite to check that a host does what it claims.

OpenWOP is months old, has one steward, and no independent organisation has implemented a host yet.

## Using them together

A workflow step can run Python code, so a crew could run inside an OpenWOP node, and an OpenWOP host could call a CrewAI agent over A2A, which both support. No packaged integration exists today.

## Common questions

### Is OpenWOP a CrewAI alternative?

Not directly. CrewAI is how you describe a team of agents in Python; OpenWOP is how a server exposes a run of whatever agents it hosts.

### Does CrewAI have replay?

Yes, from a chosen task of the latest kickoff, and Flows can resume or fork from persisted state. OpenWOP specifies fork from any event in a run's log, and a host that advertises replay must not repeat side effects.

## Sources

- [CrewAI introduction](https://docs.crewai.com/en/introduction), [flows](https://docs.crewai.com/en/concepts/flows), [replay](https://docs.crewai.com/en/learn/replay-tasks-from-latest-crew-kickoff), [A2A](https://docs.crewai.com/en/learn/a2a-agent-delegation), [MCP](https://docs.crewai.com/en/mcp/overview)
- [AMP human-in-the-loop](https://docs-platform.crewai.com/platform/en/guides/human-in-the-loop), [pricing](https://www.crewai.com/pricing), [licence](https://raw.githubusercontent.com/crewAIInc/crewAI/main/LICENSE)
- OpenWOP: [events](https://openwop.dev/spec/v2/core/events.html), [interrupt](https://openwop.dev/spec/v2/core/interrupt.html), [replay](https://openwop.dev/spec/v2/core/replay.html), [interop](https://openwop.dev/spec/v2/core/interop.html), [conformance](https://openwop.dev/conformance/)