head to head · open source
Harness vs ModularPipelines
Harness has 38,798 GitHub stars, 3,451 forks, 106 open issues and last shipped yesterday. ModularPipelines has 559 stars, 24 forks, 33 open issues and last shipped yesterday. Harness leads on adoption by 6,841% (38,798 vs 559 stars). Harness is written in Go under Apache-2.0; ModularPipelines is written in C# under MIT. Harness has attracted 9% as many forks as stars, ModularPipelines 4%. ModularPipelines 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 | ModularPipelines | |
|---|---|---|
| GitHub stars | ★ 39K | ★ 559 |
| License | Apache-2.0 | MIT |
| Written in | Go | C# |
| Last push | 2026-11-02 | 2026-11-02 |
| Forks | ⑂ 3.5K | ⑂ 24 |
| 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 ModularPipelines if
- You want the ModularPipelines feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches C#
- You evaluated both and ModularPipelines 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 ModularPipelines
ModularPipelines Write CI/CD pipelines in C . Debug them locally. Ship with confidence. The Problem with YAML Pipelines You know the drill. You write some YAML, push it, wait for CI to start, watch it fail on a typo, fix it, push again, wait again. Repeat until you lose the will to live. YAML pipelines are: Impossible to debug locally "Works on my machine" but fails mysteriously in CI No compile time safety Typos in variable names? Enjoy your 10 minute feedback loop Copy paste hell Reusing logic means duplicating YAML and hoping you update all the copies Vendor lock in Switching from GitHub Actions to Azure…
read the full ModularPipelines overview →
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Frequently asked questions
Is Harness or ModularPipelines more popular?
Harness has 38,798 GitHub stars and ModularPipelines has 559. Harness has the larger community by that measure.
Are Harness and ModularPipelines free?
Both are open source. Harness is licensed under Apache-2.0 and ModularPipelines under MIT. Neither carries a licence fee.
What is the difference between Harness and ModularPipelines?
Harness is written in Go and ModularPipelines in C#. 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 ModularPipelines?
Choose Harness if you want the larger community (38,798 stars) or its Apache-2.0 licence terms. Choose ModularPipelines if its feature set, stack or MIT licence fits better. Both are self-hostable.