Buf Schema Registry

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Score6.9

Rank#4 of 23

From$0.50/mo

Free planYes

Free trialYes

Runs onAPI, Self-hosted, Web

Summary

Buf Schema Registry (BSR) is a Protobuf-aware registry for managing API schemas, dependencies, and client access as APIs evolve. Teams can publish Protobuf files as versioned modules and resolve dependencies declared in buf.yaml. The registry generates and hosts native SDKs for supported languages and creates browsable documentation from schema versions and comments. Server-side lint and breaking-change policies can reject changes or hold them for review before consumers receive them. BSR also maps which modules depend on a given module, helping teams identify affected consumers before deprecation. A GitHub Action supports build, lint, formatting, breaking-change checks, and publishing; the Buf CLI can work with other CI/CD systems. APIs are exposed through Connect, gRPC, and gRPC-Web. Community is free and includes one private repository limited to 100 types, plus unlimited public repositories. Paid plans charge by type per month; Pro has a $3,000 monthly minimum spend. Pro includes a managed private BSR instance, while Enterprise offers self-hosted or on-premise deployment. Support varies by plan, from Community Slack to email support with a 48-business-hour response SLA on paid plans.

Who it is for

BSR may suit teams managing Protobuf-based APIs that need versioned modules, generated SDKs, schema documentation, or change-governance policies. Teams with deployment or identity requirements can compare the managed Pro and self-hosted or on-premise Enterprise options.

What is good

Versioned modules help track Protobuf API evolution
Generates SDKs for supported languages
Policies can review or reject breaking changes
Maps modules that depend on a module
APIs support Connect, gRPC, and gRPC-Web

What to know first

Community private repository is limited to 100 types
Paid plans charge by type per month
Pro has a $3,000 monthly minimum spend

Verdict

BSR combines Protobuf schema management with generated SDKs, documentation, and controls for reviewing changes. The free Community plan has a private-repository type limit, while Pro’s monthly minimum spend is substantial.

Buf Schema Registry plans and pricing

All plans

Community Free Free 1 private repository · unlimited public repositories · Community Slack support buf.build · 29 Sept 2026

Teams $0.50/mo per type / month Unlimited private repositories · email support within 48 business hours · 30-day trial buf.build · 29 Sept 2026

Pro $5/mo per type / month; $3000/month minimum spend Private BSR instance · unlimited organizations · hosted custom plugins · custom SSO with SAML and OIDC · 30-day trial buf.build · 29 Sept 2026

Enterprise Not published Custom Full data isolation · dedicated resources · self-hosted/on-prem available · custom contract terms buf.build · 29 Sept 2026

Compared on schema registry software

Free plan: Yesbuf.build
Paid from: $0.50/mobuf.build
Schema formats: Protobufbuf.build
Compatibility modes: FILE, PACKAGE, WIRE, WIRE_JSONbuf.build
Validation scope: apibuf.build
Deployment options: hybridbuf.build
Approval workflows: Yesbuf.build
Git synchronization: Nobuf.build

Facts

Purpose: The BSR is a Protobuf-aware registry for tracking and evolving APIs, managing dependencies, and helping clients consume APIs.buf.build · 29 Sept 2026
Versioned modules: Teams can publish Protobuf files as versioned modules and resolve dependencies declared in buf.yaml.buf.build · 29 Sept 2026
Generated SDKs: The BSR builds and hosts native SDKs for supported languages so consumers can install them through their usual package managers.buf.build · 29 Sept 2026
Documentation: The BSR automatically generates browsable documentation for schema versions from Protobuf files and comments.buf.build · 29 Sept 2026
Governance: Server-side lint and breaking-change policies can reject or hold changes for review before consumers receive them.buf.build · 29 Sept 2026
Dependency visibility: The BSR maps modules that depend on a module so teams can coordinate changes and identify consumers before deprecation.buf.build · 29 Sept 2026
Integrations: Buf provides a GitHub Action for build, lint, format, breaking-change checks, and publishing, and the Buf CLI can integrate with other CI/CD systems.buf.build · 29 Sept 2026
Artifact proxy: Generated SDKs can be consumed directly from the BSR or through a proxy such as Artifactory.buf.build · 29 Sept 2026
Security and identity: Pro includes custom SSO with SAML and OIDC and comprehensive audit logging; Enterprise offers access to SOC 2 audit and penetration-test reports.buf.build · 29 Sept 2026
Deployment: Enterprise offers self-hosted, on-prem deployments, while Pro provides a managed private BSR instance.buf.build · 29 Sept 2026
Community limit: Community includes one private repository, limited to 100 types, and unlimited public repositories.buf.build · 29 Sept 2026
Billing basis: Paid plans charge by Protobuf messages, enums, and RPCs, with usage calculated from the average number of types during the billing cycle.buf.build · 29 Sept 2026
Support: The pricing page lists Community Slack support and email support with a 48-business-hour response SLA for Teams, Pro, and Enterprise.buf.build · 29 Sept 2026
API access: The BSR exposes RPC APIs through Connect, gRPC, and gRPC-Web.buf.build · 29 Sept 2026