Istio vs Sozu
A side-by-side comparison of two self-hosted reverse proxy & gateways options — licensing, setup difficulty, resource needs, and what each one replaces.
Not the right match-up?
Istio
Full-featured service mesh for traffic and security control
VS
Sozu
Hot-reconfigurable HTTP reverse proxy in Rust
| Feature | Istio | Sozu |
|---|---|---|
| Category | Reverse Proxy & Gateways | Reverse Proxy & Gateways |
| License | Apache-2.0 | AGPL-3.0 |
| Language | Go | Rust |
| Setup difficulty | Hard | Hard |
| Min. RAM | 1,024 MB | 128 MB |
| Deployment | kubernetes, helm | docker, binary |
| GitHub stars | ★ 38,338 | ★ 3,715 |
| First released | 2017 | 2016 |
| Replaces | AWS App Mesh | HAProxy, Nginx |
Why pick each one
Choose Sozu if…
- Released under the AGPL-3.0 license
- First-class Docker support for quick deployment
- Active community (3.7k GitHub stars)
- Written in Rust
Frequently asked questions
Is Istio or Sozu better?
Neither is universally better. Istio has the larger community; both share a hard setup difficulty, so the decision comes down to features and licensing.
Are Istio and Sozu free and open-source?
Yes. Istio is licensed under Apache-2.0 and Sozu under AGPL-3.0. Both can be self-hosted at no software cost.
Can I run Istio and Sozu with Docker?
Istio: check the project docs for container support. Sozu: yes.