Envoy vs Fabio
A side-by-side comparison of two self-hosted reverse proxy & gateways options — licensing, setup difficulty, resource needs, and what each one replaces.
| Feature | Envoy | Fabio |
|---|---|---|
| Deploy effort | Under-an-hour setup | Under-an-hour setup |
| Health score | 98 · Excellent | 91 · Excellent |
| Category | Reverse Proxy & Gateways | Reverse Proxy & Gateways |
| License | Apache-2.0 | MIT |
| Language | C++ | Go |
| Setup difficulty | Hard | Medium |
| Min. RAM | 512 MB | 128 MB |
| Deployment | docker, kubernetes, binary | docker, binary |
| GitHub stars | ★ 28,983 | ★ 7,343 |
| First released | 2016 | 2015 |
| Replaces | Nginx, HAProxy | HAProxy, Nginx |
What are Envoy and Fabio?
Envoy
Envoy is a high-performance, open-source edge and service proxy designed for cloud-native applications and service meshes. It offers advanced load balancing, observability, and dynamic configuration.
- Service mesh data plane
- Dynamic xDS configuration
- Rich observability
- Advanced load balancing
Fabio
Fabio is a fast, modern, zero-configuration load balancing HTTP and TCP router that automatically updates routes from Consul. Services register themselves with no manual configuration.
- Zero-config routing
- Consul service discovery
- HTTP and TCP load balancing
- Hot route updates
Envoy vs Fabio: key differences
Envoy is written in C++, while Fabio is built with Go. Licensing differs — Apache-2.0 for Envoy versus MIT for Fabio. Fabio is the lighter option, starting around 128 MB of RAM against 512 MB for Envoy. Envoy has the considerably larger community, at 28,983 GitHub stars versus 7,343.
Why pick each one
Choose Envoy if…
- Advanced load balancing
- Dynamic configuration API
- Deep observability features
Watch out for
- Steep learning curve
- Verbose YAML configuration
- Heavy for simple setups
Choose Fabio if…
- Released under the MIT license
- First-class Docker support for quick deployment
- Mature project with 7.3k GitHub stars
- Written in Go
Frequently asked questions
Is Envoy or Fabio better?
Neither is universally better. Envoy has the larger community, while Fabio is simpler to set up (medium difficulty). Choose based on the comparison table above and your own setup.
Are Envoy and Fabio free and open-source?
Yes. Envoy is licensed under Apache-2.0 and Fabio under MIT. Both can be self-hosted at no software cost.
Can I run Envoy and Fabio with Docker?
Envoy: yes. Fabio: yes.
Which is lighter on resources, Envoy or Fabio?
Fabio has the smaller minimum footprint at 128 MB of RAM, compared to about 512 MB for Envoy. Real-world usage depends on library size, user count, and enabled features.