Sōzu

Clever Cloud, Nantes, France

Sōzu is an HTTP reverse proxy with runtime configurability and hot upgrades, built in Rust and used by Clever Cloud.

💸 Pricing

Sōzu is available for free.

Free ✔️ AGPL-3.0, open source

Statistics for Sōzu are still being collected and will be available later.

These are some of the best Sōzu alternatives.

Rank	Name
6	Envoy San Francisco, California, United States A high-performance, open-source edge and service proxy designed for cloud-native applications and large microservice "service mesh" architectures. FreeOpen source
11	Istio San Francisco, California, United States An open-source service mesh that secures, connects, and monitors services in Kubernetes, virtual machines, and multi-cloud environments. FreeOpen source
14	HAProxy Newton, Massachusetts, United States An open-source load balancer and reverse proxy for TCP and HTTP-based applications. FreeOpen source$$$
17	Kong Gateway San Francisco, California, United States An API gateway that manages, secures, and routes API traffic using a cloud-native, platform-agnostic architecture. FreeOpen source$105+/month
18	Ngrok San Francisco, California, United States A globally distributed reverse proxy platform that creates encrypted tunnels and consolidates load balancing, API gateway, and firewall capabilities for applications, APIs, and network services. Free$10+/month

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Sōzu is owned by Clever Cloud SAS, headquartered in Nantes, France.

Yes, it is a free load balancer.
Moreover, it is an open-source solution, and you can access its source code on GitHub.

Alternatives and possible competitors to Sōzu may include HAProxy, Envoy, and Istio.

We evaluate the popularity of technologies based on the number of websites where we detect their usage.
Technologies without a detectable web footprint, and those we do not track, are not reflected in the calculated market share.
Statistics were last calculated on September 18, 2026.
For more details, see our methodology and disclaimer.