Side-by-side comparison of AI visibility scores, market position, and capabilities
Developer platform for Protocol Buffers providing schema registries, linting, breaking change detection, and RPC tooling.
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.
a2z Radiology AI raised $20M in 2025 for its whole-body AI that simultaneously screens for 24+ conditions across CT scans — from incidental cancers to cardiovascular risk — in a single automated read.
a2z Radiology AI has developed a whole-body CT analysis platform that simultaneously screens for over 24 medical conditions across a single CT scan, including incidental cancers, coronary artery disease, aortic aneurysm, bone density loss, and organ abnormalities. The AI acts as a second reader that radiologists can use to catch incidental findings that fall outside the primary reason for a scan — a major source of missed diagnoses.
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