Kratos vs warp
Which should you use? A side-by-side look at what each one does, who it suits, what it costs, how hard it is to set up, and where each falls short.
Open source · MIT
A lightweight Go framework for building cloud-native microservices.
Open source · MIT
A Rust web server framework built from small composable filters for handling HTTP requests.
The short answer
Choose Kratos if you need…
- Go developers building a set of backend services that talk over HTTP or gRPC
- Teams that want an API-first workflow starting from Protobuf definitions
- Developers who want a lightweight framework with explicit, composable components
- Teams moving to cloud-native deployments who want pluggable registries and configuration
Choose warp if you need…
- Rust developers building HTTP APIs or web servers
- Developers who like composing small reusable request-handling pieces
- Projects that need routing, JSON or form handling, websockets, or static files in one framework
- Teams already using Tokio for asynchronous Rust code
Side-by-side
| Kratos | warp | |
|---|---|---|
| Type | Library | Library |
| Price | Free and open source | Free and open source |
| Licence | MIT | MIT |
| GitHub stars | 26k | 10.4k |
| Setup difficulty | Intermediate | Intermediate |
| How you get it | Install with a package manager | Install with a package manager |
| Main language | Go | Rust |
| Last code update | 4 days ago | 3 months ago |
What each one is
Kratos
Kratos is a Go framework for building microservices, the small backend services that together make up a larger application. It provides APIs for handling HTTP and gRPC traffic, middleware, service registry, configuration, logging, and code generation from Protobuf definitions, so developers can focus on business logic. It is maintained as an open-source project under the MIT license.
warp
warp is a web server framework for the Rust programming language. It lets developers describe what a request must look like (its path, headers, query string, or body) by combining small building blocks called filters, then write the code that answers matching requests. It is built on top of hyper, so it supports HTTP/1 and HTTP/2 and runs asynchronously.
Best for
Kratos
- Go developers building a set of backend services that talk over HTTP or gRPC
- Teams that want an API-first workflow starting from Protobuf definitions
- Developers who want a lightweight framework with explicit, composable components
- Teams moving to cloud-native deployments who want pluggable registries and configuration
warp
- Rust developers building HTTP APIs or web servers
- Developers who like composing small reusable request-handling pieces
- Projects that need routing, JSON or form handling, websockets, or static files in one framework
- Teams already using Tokio for asynchronous Rust code
Strengths
Kratos
- Unified transport layer covering both HTTP and gRPC
- Composable middleware and pluggable components for registry, config, and encoding
- Uses the standard library log/slog for logging, with OpenTelemetry extensions in contrib packages
warp
- Routing and request matching are expressed as composable filters, which the README presents as the core design
- Covers many common needs out of the box, including websockets, compression, and access logging
- Built on hyper, which the README says provides HTTP/1, HTTP/2, and async support
Not ideal for
Kratos
- Developers who do not use Go, since the framework is written for Go only
- Beginners with no Go or Protobuf experience, because the setup requires installing protoc and protoc-gen-go first
- Teams planning to upgrade from v2 without reviewing the migration guide, since v3 changes implicit behavior
warp
- People who do not write Rust, since the README only shows Rust examples
- Beginners new to both Rust and async programming, as the filter model and Tokio setup take time to learn
- Projects needing a long-term stability guarantee, since the latest release is v0.4.1 and the README does not describe its support policy
Trade-offs
Kratos
- Requires several tools to be installed before a first generated service runs (Go 1.25+, protoc, protoc-gen-go)
- The latest release v3.0.0 has no prebuilt binaries, so installation goes through Go tooling
- Upgrading from v2 requires reading the migration guide because v3 changes previously implicit behavior
warp
- Requires working knowledge of Rust and the Tokio async runtime
- The README is brief and points to external docs and examples for detail
- The README does not state a stability or maintenance commitment beyond the latest release date
Getting started
Kratos
Install the CLI
go install github.com/go-kratos/kratos/cmd/kratos/v3@latestUpgrade the CLI tooling
kratos upgradewarp
Add warp and Tokio to Cargo.toml
tokio = { version = "1", features = ["full"] }
warp = { version = "0.4", features = ["server"] }Frequently asked questions
What is the difference between Kratos and warp?
Kratos: A lightweight Go framework for building cloud-native microservices. warp: A Rust web server framework built from small composable filters for handling HTTP requests. Kratos suits go developers building a set of backend services that talk over http or grpc, while warp suits rust developers building http apis or web servers.
Are Kratos and warp free?
Kratos: Free and open source. warp: Free and open source.
Is Kratos or warp more popular?
Kratos has more GitHub stars (26k) than warp (10.4k). Popularity isn't the same as fit — check which one matches your use case above.
What are other alternatives to Kratos and warp?
Other options people compare them with include go-zero, chi, qiankun, Vapor, GetX.
Keep comparing
Built from our catalogue entries for both products: open-source details come from each project's README (AI-assisted, refreshed weekly) and GitHub data; AI-tool details are editorial. Spotted something wrong? Let us know from either product's page.