head to head · open source
OpenAPI-Specification vs open-connector
OpenAPI-Specification has 31,295 GitHub stars, 9,144 forks, 80 open issues and last shipped 2 days ago. open-connector has 6,170 stars, 588 forks, 0 open issues and last shipped yesterday. OpenAPI-Specification leads on adoption by 407% (31,295 vs 6,170 stars). OpenAPI-Specification is written in Markdown under Apache-2.0; open-connector is written in TypeScript under a custom or non-standard licence. OpenAPI-Specification has attracted 29% as many forks as stars, open-connector 10%. open-connector was the more recently maintained of the two, and both are self-hostable with no licence fee.
Two open source projects, one decision. Both are free and self-hostable — the differences are community size, license terms, language stack and release pace.
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Side by side
| OpenAPI-Specification | open-connector | |
|---|---|---|
| GitHub stars | ★ 31K | ★ 6.2K |
| License | Apache-2.0 | Custom / other |
| Written in | Markdown | TypeScript |
| Last push | 2026-11-03 | 2026-11-04 |
| Forks | ⑂ 9.1K | ⑂ 588 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick OpenAPI-Specification if
- You weight community size — 31K stars and counting
- You want the Apache-2.0 license terms
- Your stack matches Markdown
- You value the larger contributor base for long-term maintenance
pick open-connector if
- You want the open-connector feature set and don't need the biggest community
- You prefer the Custom / other license terms
- Your stack matches TypeScript
- You evaluated both and open-connector fits your workflow better
About OpenAPI-Specification
The OpenAPI Specification The OpenAPI Specification is a community driven open specification within the OpenAPI Initiative, a Linux Foundation Collaborative Project. The OpenAPI Specification (OAS) defines a standard, programming language agnostic interface description for HTTP APIs. This allows both humans and computers to discover and understand the capabilities of a service without requiring access to source code, additional documentation, or inspection of network traffic. When properly defined via OpenAPI, a consumer can understand and interact with the remote service with a minimal amount of implementation…
read the full OpenAPI-Specification overview →
About open-connector
English 简体中文 繁體中文 日本語 한국어 Русский Français Español OpenConnector is an open source connector gateway for AI agents and an alternative to Pipedream/Composio. Connect user app accounts once, then expose a shared catalog of 1,000+ providers and 10,000+ prebuilt Actions to agents and applications. Managed OAuth and hosted runtime, ready to use. No deployment or OAuth app setup. Run locally or on your own infrastructure with Docker or Node.js. You manage storage and OAuth apps. Cloudflare , Fly.io , RepoCloud , nibrun , and more. 🚀 OOMOL Hosted Self host More platforms Use the Connector SDK from app code, oo CLI as…
read the full open-connector overview →
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Frequently asked questions
Is OpenAPI-Specification or open-connector more popular?
OpenAPI-Specification has 31,295 GitHub stars and open-connector has 6,170. OpenAPI-Specification has the larger community by that measure.
Are OpenAPI-Specification and open-connector free?
Both are open source. OpenAPI-Specification is licensed under Apache-2.0, and open-connector has no licence declared in this registry. Both are free to self-host.
What is the difference between OpenAPI-Specification and open-connector?
OpenAPI-Specification is written in Markdown and open-connector in TypeScript. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, OpenAPI-Specification or open-connector?
Choose OpenAPI-Specification if you want the larger community (31,295 stars) or its Apache-2.0 licence terms. Choose open-connector if its feature set, stack or Custom / other licence fits better. Both are self-hostable.