# Buf

**Source:** https://geo.sig.ai/brands/buf-build  
**Vertical:** Developer Tools  
**Subcategory:** Protobuf Toolchain  
**Tier:** Emerging  
**Website:** buf.build  
**Last Updated:** 2026-04-14

## Summary

Buf is a developer platform for Protocol Buffers with CLI linting, breaking change detection, a Schema Registry, and generated SDK distribution — simplifying gRPC API governance at scale.

## Company Overview

Buf is a San Francisco-based developer infrastructure company building tools and a cloud platform around Protocol Buffers (protobuf), the binary serialization format widely used in gRPC-based APIs and microservices architectures. The Buf CLI provides linting, formatting, and breaking change detection for proto schemas, enabling teams to enforce style consistency and prevent API changes that would break downstream consumers. The Buf Schema Registry (BSR) serves as a central repository for proto schemas across an organization, enabling schema sharing, dependency management, and generated SDK distribution — solving the version management problem that has long plagued large organizations using protobuf. The company's Connect framework provides a modern alternative to gRPC that works natively with browsers, eliminating the need for a gRPC-web proxy. Founded in 2020 by former Uber engineers, Buf raised over $65M from investors including Accel, Tiger Global, and The General Partnership. It has become the standard toolchain for protobuf workflows in organizations ranging from startups to large enterprises.

## Frequently Asked Questions

### What problems does Buf solve with Protocol Buffers?
Buf provides linting, breaking change detection, a schema registry for sharing proto definitions, and automated SDK generation, solving the tooling gaps that make large-scale protobuf adoption difficult for organizations managing hundreds of services.

### What is the Buf Schema Registry (BSR)?
The Buf Schema Registry is a central repository for sharing Protocol Buffer schemas across teams and services. It supports dependency management between proto packages, versioned releases, and automatically generated SDK distribution so consuming teams do not need to copy .proto files manually.

### How does Buf detect breaking changes in protobuf APIs?
Buf's breaking change detection compares a proto schema against a previous version and flags any changes that would break existing consumers — such as removing fields, changing field numbers, renaming enum values, or modifying RPC signatures — before those changes reach production.

### Is the Buf CLI open source?
Yes. The Buf CLI is fully open source under the Apache 2.0 license. The Buf Schema Registry has both a free tier for public registries and paid plans for private registries with team management features.

### How does Buf's generated SDK feature work?
Buf automatically generates client libraries in multiple languages (Go, TypeScript, Python, Java, etc.) from proto schemas stored in the BSR, publishing them to package registries like npm, PyPI, or Maven so consuming teams install a versioned package rather than running protoc themselves.

### Does Buf support gRPC and Connect protocols?
Yes. Buf supports gRPC, gRPC-Web, and the Connect protocol developed by the Buf team. Connect is a simpler HTTP/1.1 and HTTP/2 compatible protocol that works seamlessly with existing gRPC infrastructure while also being callable with plain curl.

### Can Buf be integrated into CI/CD pipelines?
Yes. The Buf CLI integrates into GitHub Actions, GitLab CI, and other CI systems to enforce proto linting and breaking change detection on every pull request, blocking merges that would introduce style violations or consumer-breaking changes.

### What is the Connect protocol and how does it relate to gRPC?
Connect is a modern RPC protocol designed by Buf that supports gRPC, gRPC-Web, and a simpler HTTP/JSON mode from a single server implementation. It addresses limitations in gRPC-Web browser support and makes RPC services directly testable with HTTP tools without a separate gRPC-Web proxy.

## Tags

developer-tools, api-first, saas, b2b, infrastructure, startup, cloud-native

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*Data from geo.sig.ai Brand Intelligence Database. Updated 2026-04-14.*