head to head · open source
Prometheus vs FreeSql
Prometheus has 66,906 GitHub stars, 10,969 forks, 890 open issues and last shipped yesterday. FreeSql has 4,406 stars, 910 forks, 178 open issues and last shipped 2 days ago. Prometheus leads on adoption by 1,419% (66,906 vs 4,406 stars). Prometheus is written in Go under Apache-2.0; FreeSql is written in C# under MIT. Prometheus has attracted 16% as many forks as stars, FreeSql 21%. Prometheus was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 1 topic tag (hacktoberfest), 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
| Prometheus | FreeSql | |
|---|---|---|
| GitHub stars | ★ 67K | ★ 4.4K |
| License | Apache-2.0 | MIT |
| Written in | Go | C# |
| Last push | 2026-11-02 | 2026-11-01 |
| Forks | ⑂ 11K | ⑂ 910 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick Prometheus if
- You weight community size — 67K stars and counting
- You want the Apache-2.0 license terms
- Your stack matches Go
- You value the larger contributor base for long-term maintenance
pick FreeSql if
- You want the FreeSql feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches C#
- You evaluated both and FreeSql fits your workflow better
About Prometheus
Prometheus Visit prometheus.io for the full documentation, examples and guides. [ ][quay] [ ][hub] Prometheus, a Cloud Native Computing Foundation project, is a systems and service monitoring system. It collects metrics from configured targets at given intervals, evaluates rule expressions, displays the results, and can trigger alerts when specified conditions are observed. The features that distinguish Prometheus from other metrics and monitoring systems are: A multi dimensional data model (time series defined by metric name and set of key/value dimensions) PromQL, a powerful and flexible query language to…
read the full Prometheus overview →
About FreeSql
🦄 FreeSql, The First AOT ORM! FreeSql is a powerful O/RM component, supports .NET Core 2.1+, .NET Framework 4.0+, Xamarin, And AOT. English 中文 🛠 Support CodeFirst data migration. 💻 Support DbFirst import entity class from database, or use Generation Tool. ⛳ Support advanced type mapping, such as PostgreSQL array type, etc. 🌲 Support expression functions, and customizable analysis. 🏁 Support one to many and many to many navigation properties, include and lazy loading. 📃 Support Read/Write separation, Splitting Table/Database, Global filters, Optimistic and pessimistic locker. 🌳 Support
read the full FreeSql overview →
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Frequently asked questions
Is Prometheus or FreeSql more popular?
Prometheus has 66,906 GitHub stars and FreeSql has 4,406. Prometheus has the larger community by that measure.
Are Prometheus and FreeSql free?
Both are open source. Prometheus is licensed under Apache-2.0 and FreeSql under MIT. Neither carries a licence fee.
What is the difference between Prometheus and FreeSql?
Prometheus is written in Go and FreeSql 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, Prometheus or FreeSql?
Choose Prometheus if you want the larger community (66,906 stars) or its Apache-2.0 licence terms. Choose FreeSql if its feature set, stack or MIT licence fits better. Both are self-hostable.