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OpenSourceAlternatives

Tag

grpc

5 catalogue entries use this topic; each Project's license policy is labeled separately.

Insomnia

InsomniaAIOpen

Open-source API client for designing, testing, and mocking APIs

Stars40K
Commitjust now
LicenseApache-2.0

Insomnia is Kong's open-source desktop API client for designing, debugging, and testing REST, GraphQL, gRPC, and WebSocket APIs.

Alternative toPostman
Yaak

YaakOpen

Local-first desktop API client for REST, GraphQL, gRPC, and more

Stars19.3K
Commitjust now
LicenseMIT

Yaak is a local-first desktop API client from the creator of Insomnia, with MIT-licensed source code. It sends REST, GraphQL, gRPC, WebSocket, and Server-Sent Events requests from native apps on macOS, Windows, and Linux.

Alternative toPostman
Weaviate

WeaviateAIOpen

Open-source AI-native vector database for search and RAG

Stars16.9K
Commitjust now
LicenseBSD-3-Clause

Weaviate is an open-source vector database for AI search, combining vector, keyword, and hybrid retrieval with self-hosted Docker or managed cloud deployment.

Alternative toQdrant
Tyk

TykOpen

Open-source API and AI gateway with dashboard and cloud

Stars10.9K
Commitjust now
LicenseMPL-2.0

Tyk is an open-source API and AI gateway enforcing authentication, rate limits and analytics across REST, GraphQL, gRPC and MCP services. Teams self-host it with Docker or Kubernetes, or use the managed Tyk Cloud.

Alternative toKrakenD
Voiden

VoidenOpen

Offline, Git-native API workspace in plain Markdown

Stars1,807
Commitjust now
LicenseApache-2.0

Voiden is an offline, Git-native API workspace that keeps requests, tests, notes, and documentation together in plain-text .void files.

Alternative toPostman