head to head · open source
Harness vs backend.ai
Harness has 38,378 GitHub stars, 3,397 forks, 106 open issues and last shipped 2 days ago. backend.ai has 669 stars, 183 forks, 1,617 open issues and last shipped yesterday. Harness leads on adoption by 5,637% (38,378 vs 669 stars). Harness is written in Go under Apache-2.0; backend.ai is written in Python under LGPL-3.0. Harness has attracted 9% as many forks as stars, backend.ai 27%. backend.ai was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 1 topic tag (docker), so they are genuine substitutes rather than adjacent tools.
Two open source projects, one decision. Both are free and self-hostable — the differences are community size, license terms, language stack and release pace.
← all 8884 open source comparisons
Side by side
| Harness | backend.ai | |
|---|---|---|
| GitHub stars | ★ 38K | ★ 669 |
| License | Apache-2.0 | LGPL-3.0 |
| Written in | Go | Python |
| Last push | 2026-09-16 | 2026-09-17 |
| Forks | ⑂ 3.4K | ⑂ 183 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick Harness if
- You weight community size — 38K 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 backend.ai if
- You want the backend.ai feature set and don't need the biggest community
- You prefer the LGPL-3.0 license terms
- Your stack matches Python
- You evaluated both and backend.ai fits your workflow better
About Harness
Harness Open Source is an Apache 2.0, Go based developer platform that combines Git source control management, CI/CD pipelines, Gitspaces hosted development environments and artifact registries into one self hostable system for engineering teams that want end to end software delivery without stitching four separate products together.
read the full Harness overview →
About backend.ai
Backend.AI is an open source, container based computing cluster platform that hosts machine learning frameworks and diverse programming languages and allocates isolated multi tenant compute sessions on Docker or Podman with pluggable accelerator support behind REST and GraphQL APIs.
read the full backend.ai overview →
More in Developer Tools
Related comparisons
More Build & Deployment projects
Compare either of these against the rest of the Build & Deployment field.
Frequently asked questions
Is Harness or backend.ai more popular?
Harness has 38,378 GitHub stars and backend.ai has 669. Harness has the larger community by that measure.
Are Harness and backend.ai free?
Both are open source. Harness is licensed under Apache-2.0 and backend.ai under LGPL-3.0. Neither carries a licence fee.
What is the difference between Harness and backend.ai?
Harness is written in Go and backend.ai in Python. 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 backend.ai?
Choose Harness if you want the larger community (38,378 stars) or its Apache-2.0 licence terms. Choose backend.ai if its feature set, stack or LGPL-3.0 licence fits better. Both are self-hostable.