head to head · open source
opensre vs calico
opensre has 11,150 GitHub stars, 1,627 forks, 67 open issues and last shipped today. calico has 7,363 stars, 1,607 forks, 279 open issues and last shipped today. opensre leads on adoption by 51% (11,150 vs 7,363 stars). opensre is written in Python under Apache-2.0; calico is written in Go under Apache-2.0. opensre has attracted 15% as many forks as stars, calico 22%. calico 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
| opensre | calico | |
|---|---|---|
| GitHub stars | ★ 11K | ★ 7.4K |
| License | Apache-2.0 | Apache-2.0 |
| Written in | Python | Go |
| Last push | 2026-09-20 | 2026-09-20 |
| Forks | ⑂ 1.6K | ⑂ 1.6K |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick opensre if
- You weight community size — 11K stars and counting
- You want the Apache-2.0 license terms
- Your stack matches Python
- You value the larger contributor base for long-term maintenance
pick calico if
- You want the calico feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches Go
- You evaluated both and calico fits your workflow better
About opensre
OpenSRE is an open source Python framework for building AI SRE agents, distributed under the Apache 2.0 license. It lives in the infrastructure and operations ecosystem, specifically the monitoring and observability space, and it describes itself as the toolkit for AI era site reliability engineering. The project is currently at v0.1 and is published as a public alpha, meaning the core workflows are usable for early exploration but are not yet fully stable, and both APIs and integrations may evolve as development continues.
read the full opensre overview →
About calico
Calico is an open source, Apache 2.0 licensed cloud native networking and network security project for Kubernetes clusters, maintained by Tigera and aimed at platform engineers, cluster operators and network teams who need container networking, network policy enforcement and encryption across on premises, cloud and bare metal environments.
read the full calico overview →
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Frequently asked questions
Is opensre or calico more popular?
opensre has 11,150 GitHub stars and calico has 7,363. opensre has the larger community by that measure.
Are opensre and calico free?
Both are open source. opensre is licensed under Apache-2.0 and calico under Apache-2.0. Neither carries a licence fee.
What is the difference between opensre and calico?
opensre is written in Python and calico in Go. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, opensre or calico?
Choose opensre if you want the larger community (11,150 stars) or its Apache-2.0 licence terms. Choose calico if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.