head to head · open source
opensre vs calico
opensre has 12,696 GitHub stars, 1,864 forks, 67 open issues and last shipped yesterday. calico has 7,410 stars, 1,620 forks, 279 open issues and last shipped yesterday. opensre leads on adoption by 71% (12,696 vs 7,410 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 | ★ 13K | ★ 7.4K |
| License | Apache-2.0 | Apache-2.0 |
| Written in | Python | Go |
| Last push | 2026-11-04 | 2026-11-04 |
| Forks | ⑂ 1.9K | ⑂ 1.6K |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick opensre if
- You weight community size — 13K 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 v0.1: Build Your Own AI SRE Agents The open source framework for AI SRE agents, and the training and evaluation environment they need to improve. Connect the 60+ tools you already run, define your own workflows, and answer production questions on your own infrastructure. Quickstart · Docs · FAQ · Security 🚧 Public Alpha: Core workflows are usable for early exploration, though not yet fully stable. The project is in active development, and APIs and integrations may evolve Table of Contents Why OpenSRE? Install Quick Start Deployment How OpenSRE Works Capabilities & integrations Contributing & development…
read the full opensre overview →
About calico
Calico Quickstart Docs Contribute Slack Releases 🐾 Welcome to Project Calico! Project Calico, created and maintained by [Tigera][tigera], is an open source project with an active development and user community. Calico Open Source has grown to be the most widely adopted solution for container networking and security, powering 8M+ nodes daily across 166 countries. 🌟 Why use Calico? Data Plane Choice : eBPF, standard Linux, Windows, and VPP — versatility in network solutions. Interoperability : Works across multiple distros, multiple clouds, bare metal, and VMs. Optimized Performance : Engineered for high speed…
read the full calico overview →
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Frequently asked questions
Is opensre or calico more popular?
opensre has 12,696 GitHub stars and calico has 7,410. 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 (12,696 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.