head to head · open source
Harness vs middy
Harness has 38,798 GitHub stars, 3,451 forks, 106 open issues and last shipped yesterday. middy has 3,905 stars, 398 forks, 9 open issues and last shipped 4 days ago. Harness leads on adoption by 894% (38,798 vs 3,905 stars). Harness is written in Go under Apache-2.0; middy is written in JavaScript under MIT. Harness has attracted 9% as many forks as stars, middy 10%. Harness 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
| Harness | middy | |
|---|---|---|
| GitHub stars | ★ 39K | ★ 3.9K |
| License | Apache-2.0 | MIT |
| Written in | Go | JavaScript |
| Last push | 2026-11-02 | 2026-10-30 |
| Forks | ⑂ 3.5K | ⑂ 398 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick Harness if
- You weight community size — 39K stars and counting
- You want the Apache-2.0 license terms
- Your stack matches Go
- You value the larger contributor base for long-term maintenance
pick middy if
- You want the middy feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches JavaScript
- You evaluated both and middy fits your workflow better
About Harness
Harness Harness Open Source is an open source development platform packed with the power of code hosting, automated DevOps pipelines, hosted development environments (Gitspaces), and artifact registries. Overview Harness Open source is an open source development platform packed with the power of code hosting, automated DevOps pipelines, Gitspaces, and artifact registries. Running Harness locally The latest publicly released docker image can be found on harness/harness. To install Harness yourself, simply run the command below. Once the container is up, you can visit in your browser. The Harness image uses a…
read the full Harness overview →
About middy
The stylish Node.js middleware engine for AWS Lambda Full documentation: · LLM friendly: llms.txt / llms full.txt What is Middy Middy is a middleware engine for AWS Lambda on Node.js. It lets you keep your handler focused on business logic while attaching reusable steps for parsing, validation, auth, observability, error handling, and AWS service integration. 52 official packages covering API Gateway, SQS, S3, DynamoDB, SNS, EventBridge, Kinesis, Kafka, WebSockets, and more Built in TypeScript types, Node.js = 22, ESM Tiny core (only @middy/util , plus an optional peer dependency for durable functions)…
read the full middy overview →
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Frequently asked questions
Is Harness or middy more popular?
Harness has 38,798 GitHub stars and middy has 3,905. Harness has the larger community by that measure.
Are Harness and middy free?
Both are open source. Harness is licensed under Apache-2.0 and middy under MIT. Neither carries a licence fee.
What is the difference between Harness and middy?
Harness is written in Go and middy in JavaScript. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, Harness or middy?
Choose Harness if you want the larger community (38,798 stars) or its Apache-2.0 licence terms. Choose middy if its feature set, stack or MIT licence fits better. Both are self-hostable.