head to head · open source
Vector vs evo
Vector has 22,589 GitHub stars, 2,286 forks, 2,512 open issues and last shipped 2 days ago. evo has 4,318 stars, 797 forks, 7 open issues and last shipped 12 days ago. Vector leads on adoption by 423% (22,589 vs 4,318 stars). Vector is written in Rust under MPL-2.0; evo is written in Python under GPL-3.0. Vector has attracted 10% as many forks as stars, evo 18%. Vector was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 1 topic tag (metrics), 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.
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Side by side
| Vector | evo | |
|---|---|---|
| GitHub stars | ★ 23K | ★ 4.3K |
| License | MPL-2.0 | GPL-3.0 |
| Written in | Rust | Python |
| Last push | 2026-09-18 | 2026-09-08 |
| Forks | ⑂ 2.3K | ⑂ 797 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick Vector if
- You weight community size — 23K stars and counting
- You want the MPL-2.0 license terms
- Your stack matches Rust
- You value the larger contributor base for long-term maintenance
pick evo if
- You want the evo feature set and don't need the biggest community
- You prefer the GPL-3.0 license terms
- Your stack matches Python
- You evaluated both and evo fits your workflow better
About Vector
Vector is an open source observability data pipeline written in Rust and licensed under MPL 2.0. It operates as an end to end system for collecting, transforming, and routing logs and metrics within the cloud native monitoring ecosystem. The project is maintained by Datadog's Community Open Source Engineering team, and its topics include agent, cloud native, data transformation, datadog, etl, events, forwarder, logs, metrics, and monitoring.
read the full Vector overview →
About evo
evo is a Python package, released under the GPL 3.0 licence, that provides executables and a small library for handling, evaluating and comparing the trajectory output of odometry and SLAM algorithms, and it is aimed at robotics researchers and engineers who need to benchmark trajectories rather than maintain one evaluation script per dataset.
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Frequently asked questions
Is Vector or evo more popular?
Vector has 22,589 GitHub stars and evo has 4,318. Vector has the larger community by that measure.
Are Vector and evo free?
Both are open source. Vector is licensed under MPL-2.0 and evo under GPL-3.0. Neither carries a licence fee.
What is the difference between Vector and evo?
Vector is written in Rust and evo 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, Vector or evo?
Choose Vector if you want the larger community (22,589 stars) or its MPL-2.0 licence terms. Choose evo if its feature set, stack or GPL-3.0 licence fits better. Both are self-hostable.