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Side-by-side comparison

Pick up to four tools and compare adoption, momentum and maintenance at a glance. The crown marks the leader in each row.

OpenAPI Specification

Vendor-neutral standard for describing HTTP APIs that drives docs, mocks, SDK and server generation.

tRPC

End-to-end type-safe APIs for TypeScript monorepos without schemas or code generation.

gRPC

High-performance RPC framework over HTTP/2 with Protocol Buffers; the standard for service-to-service calls.

Protocol Buffers

Google's language-neutral binary serialization format and IDL behind gRPC.

Head to head

Metric	OpenAPI Specification	tRPC	gRPC	Protocol Buffers
Stars	31.3k	40.8k	45.4k	72.2k
Weekly downloads	n/a	6.8M	n/a	n/a
Download growth	n/a	+40%	n/a	n/a
Popularity score	82/100	84/100	85/100	89/100
Forks	9.1k	1.7k	11.3k	16.4k
Open issues	84	124	1.4k	418
Last commit	1w ago	3d ago	1d ago	today
Latest version	n/a	11.28.0	n/a	n/a
License	Apache-2.0	MIT	Apache-2.0	n/a
First released	2014	2020	2014	2014
Signals	Popular	None	Popular	Popular
Listed in	Backend › RPC, gRPC & OpenAPI	Frontend › Data Fetching & API Clients Backend › RPC, gRPC & OpenAPI	Backend › RPC, gRPC & OpenAPI	Backend › RPC, gRPC & OpenAPI

Weekly downloads over time

Hover for exact values; switch to log scale for tools of very different sizes. Not shown (no comparable download data): OpenAPI Specification, gRPC, Protocol Buffers.

OpenAPI Specification

Vendor-neutral standard for describing HTTP APIs that drives docs, mocks, SDK and server generation.

tRPC

End-to-end type-safe APIs for TypeScript monorepos without schemas or code generation.

gRPC

High-performance RPC framework over HTTP/2 with Protocol Buffers; the standard for service-to-service calls.

Protocol Buffers

Google's language-neutral binary serialization format and IDL behind gRPC.

Head to head

Metric	OpenAPI Specification	tRPC	gRPC	Protocol Buffers
Stars	31.3k	40.8k	45.4k	72.2k
Weekly downloads	n/a	6.8M	n/a	n/a
Download growth	n/a	+40%	n/a	n/a
Popularity score	82/100	84/100	85/100	89/100
Forks	9.1k	1.7k	11.3k	16.4k
Open issues	84	124	1.4k	418
Last commit	1w ago	3d ago	1d ago	today
Latest version	n/a	11.28.0	n/a	n/a
License	Apache-2.0	MIT	Apache-2.0	n/a
First released	2014	2020	2014	2014
Signals	Popular	None	Popular	Popular
Listed in	Backend › RPC, gRPC & OpenAPI	Frontend › Data Fetching & API Clients Backend › RPC, gRPC & OpenAPI	Backend › RPC, gRPC & OpenAPI	Backend › RPC, gRPC & OpenAPI

Weekly downloads over time

Hover for exact values; switch to log scale for tools of very different sizes. Not shown (no comparable download data): OpenAPI Specification, gRPC, Protocol Buffers.

Side-by-side comparison

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Weekly downloads over time

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Weekly downloads over time