Istio vs sslh
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
sslh
Protocol multiplexer that shares one port between services
| Feature | Istio | sslh |
|---|---|---|
| Category | Reverse Proxy & Gateways | Reverse Proxy & Gateways |
| License | Apache-2.0 | GPL-2.0 |
| Language | Go | C |
| Setup difficulty | Hard | Easy |
| Min. RAM | 1,024 MB | 32 MB |
| Deployment | kubernetes, helm | docker, bare-metal, binary |
| GitHub stars | ★ 38,338 | ★ 5,098 |
| First released | 2017 | 2008 |
| Replaces | AWS App Mesh | HAProxy |
Why pick each one
Choose sslh if…
- Released under the GPL-2.0 license
- Easy to set up — beginner-friendly
- First-class Docker support for quick deployment
- Mature project with 5.1k GitHub stars
Frequently asked questions
Is Istio or sslh better?
Neither is universally better. Istio has the larger community, while sslh is simpler to set up (easy difficulty). Choose based on the comparison table above and your own setup.
Are Istio and sslh free and open-source?
Yes. Istio is licensed under Apache-2.0 and sslh under GPL-2.0. Both can be self-hosted at no software cost.
Can I run Istio and sslh with Docker?
Istio: check the project docs for container support. sslh: yes.