head to head · open source
OpenObserve vs PhpMetrics
OpenObserve has 22,777 GitHub stars, 1,179 forks, 598 open issues and last shipped yesterday. PhpMetrics has 2,617 stars, 261 forks, 4 open issues and last shipped 3 months ago. OpenObserve leads on adoption by 770% (22,777 vs 2,617 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 | ★ 23K | ★ 2.6K |
| License | AGPL-3.0 | MIT |
| Written in | TypeScript | PHP |
| Last push | 2026-11-04 | 2026-08-21 |
| Forks | ⑂ 1.2K | ⑂ 261 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick OpenObserve if
- You weight community size — 23K 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
Open source Datadog alternative for logs, metrics, traces, and frontend monitoring. Modern observability platform: 10x easier, 140x lower storage cost, high performance, petabyte scale. Cloud · Documentation · Slack · Quickstart OpenObserve (O2) is a cloud native observability platform for logs, metrics, traces, analytics, Real User Monitoring (RUM), and AI/LLM observability. It's a cost effective alternative to Datadog, Splunk, and Elasticsearch for teams that need full observability without the complexity or cost — with Parquet columnar storage and an S3 native design that cuts storage costs by up to 140x…
read the full OpenObserve overview →
About PhpMetrics
PhpMetrics PhpMetrics provides metrics about PHP project and classes, with beautiful and readable HTML report. Documentation Twitter Contributing Quick start Follow the quick start guide to get started. Then open the generated ./myreport/index.html file in your browser. You can use a configuration file to customize the report, add options, configure rules for Continuous Integration, etc. Metrics You'll find detailed list of metrics in documentation, or running php ./vendor/bin/phpmetrics metrics Author + Jean François Lépine License See the LICENSE file. Contributing See the CONTRIBUTING file. Support the…
read the full PhpMetrics overview →
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Frequently asked questions
Is OpenObserve or PhpMetrics more popular?
OpenObserve has 22,777 GitHub stars and PhpMetrics has 2,617. 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 (22,777 stars) or its AGPL-3.0 licence terms. Choose PhpMetrics if its feature set, stack or MIT licence fits better. Both are self-hostable.