Checked 4 October 2026. Figures for n8n come from its own docs, licence, repository and blog.
At a glance
| Property | OpenWOP | n8n |
|---|---|---|
| What it is | A wire protocol plus a conformance suite | A low-code workflow automation platform with AI features (docs) |
| Licence | Spec CC BY 4.0, code Apache 2.0 (OSI-approved) | Sustainable Use License, "fair-code"; n8n says "we do not call ourselves open source" (FAQ) |
| Who it's for | Developers building hosts and clients | Builders on a visual canvas, plus code nodes |
| Integrations | Signed packs; 44 in the reference app | 2,285 listed on its integrations page |
| Where state lives | An append-only event log per run (events) | Execution data in SQLite or Postgres |
| Human approval | Approval interrupts (interrupt) | Send-and-wait approvals and human review of AI tool calls (docs) |
| Replay | Fork without repeating side effects on hosts that advertise replay (replay) | Retry executions and debug past runs in the editor (docs) |
| Portability | One run API across compatible hosts | Workflow JSON that runs on n8n |
| Adoption | New: the spec repo started in May 2026 | About 206,000 GitHub stars |
When to choose n8n
- You want to automate business processes visually, connecting SaaS tools without writing a service.
- You need a large integration catalogue and templates now.
- Non-developers on your team will build and maintain the workflows.
When OpenWOP fits
- You are a developer building an agent platform or runtime and want a defined run contract: approvals, event log, replay and conformance.
- You need the same run behaviour across hosts, not inside one product.
OpenWOP is months old, has one steward, and no independent organisation has implemented a host yet.
Using them together
An OpenWOP step could call an n8n workflow through its webhook trigger, and an n8n HTTP node could start an OpenWOP run; both also support MCP. Nothing has been built yet.
Common questions
Is OpenWOP an n8n alternative?
Not for most n8n users. n8n is a product for building automations visually; OpenWOP is a protocol for developers who build or call workflow hosts.
Is n8n open source?
n8n describes itself as fair-code under the Sustainable Use License, not open source. OpenWOP's code is Apache 2.0 and its spec is CC BY 4.0.
Sources
- n8n overview, licence FAQ, licence, integrations
- Approvals, debugging executions
- OpenWOP: events, interrupt, replay, packs