head to head · open source
OpenObserve vs PhpMetrics
OpenObserve has 22,027 GitHub stars, 1,098 forks, 598 open issues and last shipped today. PhpMetrics has 2,612 stars, 261 forks, 4 open issues and last shipped 1 months ago. OpenObserve leads on adoption by 743% (22,027 vs 2,612 stars). OpenObserve is written in TypeScript under AGPL-3.0; PhpMetrics is written in PHP under MIT. OpenObserve has attracted 5% as many forks as stars, PhpMetrics 10%. OpenObserve 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
| OpenObserve | PhpMetrics | |
|---|---|---|
| GitHub stars | ★ 22K | ★ 2.6K |
| License | AGPL-3.0 | MIT |
| Written in | TypeScript | PHP |
| Last push | 2026-09-20 | 2026-08-21 |
| Forks | ⑂ 1.1K | ⑂ 261 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick OpenObserve if
- You weight community size — 22K stars and counting
- You want the AGPL-3.0 license terms
- Your stack matches TypeScript
- You value the larger contributor base for long-term maintenance
pick PhpMetrics if
- You want the PhpMetrics feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches PHP
- You evaluated both and PhpMetrics fits your workflow better
About OpenObserve
OpenObserve is an open source observability platform for logs, metrics, traces, analytics, Real User Monitoring, session replay, pipelines, SLO, and LLM observability. It lives in the cloud native infrastructure ecosystem and is described as an alternative to Datadog, Splunk, and Elasticsearch. The project is built in Rust, ships as a single binary, and uses Parquet columnar storage with an S3 native design.
read the full OpenObserve overview →
About PhpMetrics
PhpMetrics is an MIT licensed static analysis tool for PHP, distributed through Composer as phpmetrics/phpmetrics , that computes metrics about a PHP project and its classes and renders them as an HTML report for developers, tech leads, and CI pipelines that need visible code quality data.
read the full PhpMetrics overview →
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Frequently asked questions
Is OpenObserve or PhpMetrics more popular?
OpenObserve has 22,027 GitHub stars and PhpMetrics has 2,612. OpenObserve has the larger community by that measure.
Are OpenObserve and PhpMetrics free?
Both are open source. OpenObserve is licensed under AGPL-3.0 and PhpMetrics under MIT. Neither carries a licence fee.
What is the difference between OpenObserve and PhpMetrics?
OpenObserve is written in TypeScript and PhpMetrics in PHP. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, OpenObserve or PhpMetrics?
Choose OpenObserve if you want the larger community (22,027 stars) or its AGPL-3.0 licence terms. Choose PhpMetrics if its feature set, stack or MIT licence fits better. Both are self-hostable.