head to head · open source
fastapi vs scalecube-services
fastapi has 104,566 GitHub stars, 10,179 forks, 78 open issues and last shipped yesterday. scalecube-services has 639 stars, 112 forks, 17 open issues and last shipped 6 days ago. fastapi leads on adoption by 16,264% (104,566 vs 639 stars). fastapi is written in Python under MIT; scalecube-services is written in Java under Apache-2.0. fastapi has attracted 10% as many forks as stars, scalecube-services 18%. fastapi was the more recently maintained of the two, and both are self-hostable with no licence fee.
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
| fastapi | scalecube-services | |
|---|---|---|
| GitHub stars | ★ 105K | ★ 639 |
| License | MIT | Apache-2.0 |
| Written in | Python | Java |
| Last push | 2026-11-02 | 2026-10-28 |
| Forks | ⑂ 10K | ⑂ 112 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick fastapi if
- You weight community size — 105K stars and counting
- You want the MIT license terms
- Your stack matches Python
- You value the larger contributor base for long-term maintenance
pick scalecube-services if
- You want the scalecube-services feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches Java
- You evaluated both and scalecube-services fits your workflow better
About fastapi
FastAPI framework, high performance, easy to learn, fast to code, ready for production Documentation : Source Code : FastAPI is a modern, fast (high performance), web framework for building APIs with Python based on standard Python type hints. The key features are: Fast : Very high performance, on par with NodeJS and Go (thanks to Starlette and Pydantic). One of the fastest Python frameworks available. Fast to code : Increase the speed to develop features by about 200% to 300%. Fewer bugs : Reduce about 40% of human (developer) induced errors. Intuitive : Great editor support. Completion everywhere. Less time…
read the full fastapi overview →
About scalecube-services
scalecube services MICROSERVICES 2.0 ScaleCube is a microservices library designed for high throughput and lower latency, catering to scalable and reactive system needs. It excels in API gateway integration, service discovery, and load balancing, employing the SWIM protocol for efficient cluster management. Its modular architecture supports various pluggable communication modules, enabling seamless and flexible deployments. With a focus on real time stream processing and fault tolerance, ScaleCube ensures optimal performance and reliability for distributed microservices environments. Reactive microservices…
read the full scalecube-services overview →
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Frequently asked questions
Is fastapi or scalecube-services more popular?
fastapi has 104,566 GitHub stars and scalecube-services has 639. fastapi has the larger community by that measure.
Are fastapi and scalecube-services free?
Both are open source. fastapi is licensed under MIT and scalecube-services under Apache-2.0. Neither carries a licence fee.
What is the difference between fastapi and scalecube-services?
fastapi is written in Python and scalecube-services in Java. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, fastapi or scalecube-services?
Choose fastapi if you want the larger community (104,566 stars) or its MIT licence terms. Choose scalecube-services if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.