head to head · open source
Vector vs opentelemetry-cpp
Vector has 22,589 GitHub stars, 2,286 forks, 2,512 open issues and last shipped 2 days ago. opentelemetry-cpp has 1,378 stars, 632 forks, 290 open issues and last shipped yesterday. Vector leads on adoption by 1,539% (22,589 vs 1,378 stars). Vector is written in Rust under MPL-2.0; opentelemetry-cpp is written in C++ under Apache-2.0. Vector has attracted 10% as many forks as stars, opentelemetry-cpp 46%. opentelemetry-cpp 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 | opentelemetry-cpp | |
|---|---|---|
| GitHub stars | ★ 23K | ★ 1.4K |
| License | MPL-2.0 | Apache-2.0 |
| Written in | Rust | C++ |
| Last push | 2026-09-18 | 2026-09-19 |
| Forks | ⑂ 2.3K | ⑂ 632 |
| 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 opentelemetry-cpp if
- You want the opentelemetry-cpp feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches C++
- You evaluated both and opentelemetry-cpp 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 opentelemetry-cpp
OpenTelemetry C++ is the official C++ client for OpenTelemetry, the vendor neutral observability framework, and it is built for C++ application owners and library authors who need to emit logs, metrics, and traces from native code.
read the full opentelemetry-cpp overview →
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Frequently asked questions
Is Vector or opentelemetry-cpp more popular?
Vector has 22,589 GitHub stars and opentelemetry-cpp has 1,378. Vector has the larger community by that measure.
Are Vector and opentelemetry-cpp free?
Both are open source. Vector is licensed under MPL-2.0 and opentelemetry-cpp under Apache-2.0. Neither carries a licence fee.
What is the difference between Vector and opentelemetry-cpp?
Vector is written in Rust and opentelemetry-cpp 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, Vector or opentelemetry-cpp?
Choose Vector if you want the larger community (22,589 stars) or its MPL-2.0 licence terms. Choose opentelemetry-cpp if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.