head to head · open source
grpc-gateway vs open-connector
grpc-gateway has 20,001 GitHub stars, 2,410 forks, 149 open issues and last shipped yesterday. open-connector has 5,833 stars, 511 forks, 0 open issues and last shipped today. grpc-gateway leads on adoption by 243% (20,001 vs 5,833 stars). grpc-gateway is written in Go under BSD-3-Clause; open-connector is written in TypeScript under Apache-2.0. grpc-gateway has attracted 12% as many forks as stars, open-connector 9%. 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
| grpc-gateway | open-connector | |
|---|---|---|
| GitHub stars | ★ 20K | ★ 5.8K |
| License | BSD-3-Clause | Apache-2.0 |
| Written in | Go | TypeScript |
| Last push | 2026-09-19 | 2026-09-20 |
| Forks | ⑂ 2.4K | ⑂ 511 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick grpc-gateway if
- You weight community size — 20K stars and counting
- You want the BSD-3-Clause license terms
- Your stack matches Go
- 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 Apache-2.0 license terms
- Your stack matches TypeScript
- You evaluated both and open-connector fits your workflow better
About grpc-gateway
gRPC Gateway is a plugin for protoc , the Google protocol buffers compiler. It reads protobuf service definitions and generates a reverse proxy server that translates a RESTful HTTP API into gRPC. The generated server follows the google.api.http annotations attached to those service definitions, so a single set of protobuf services can be exposed in both gRPC and RESTful style at the same time. It lives in the gRPC ecosystem, is written in Go, and is distributed under the BSD 3 Clause license.
read the full grpc-gateway overview →
About open-connector
OpenConnector is an open source auth gateway that connects more than a thousand SaaS providers to AI agents through a Connector SDK, the oo CLI, MCP, HTTP/OpenAPI, and a Web Console, and it is built for developers and teams wiring durable app access into agent products.
read the full open-connector overview →
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Frequently asked questions
Is grpc-gateway or open-connector more popular?
grpc-gateway has 20,001 GitHub stars and open-connector has 5,833. grpc-gateway has the larger community by that measure.
Are grpc-gateway and open-connector free?
Both are open source. grpc-gateway is licensed under BSD-3-Clause and open-connector under Apache-2.0. Neither carries a licence fee.
What is the difference between grpc-gateway and open-connector?
grpc-gateway is written in Go 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, grpc-gateway or open-connector?
Choose grpc-gateway if you want the larger community (20,001 stars) or its BSD-3-Clause licence terms. Choose open-connector if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.