Kreya vs ProtoCall

Kreya is a desktop API client for exploring, testing, and automating API workflows on Linux, macOS, and Windows. It works with gRPC, REST, GraphQL, WebSockets, and Server-Sent Events, and can watch or import OpenAPI specifications, GraphQL schemas, and protobufs. Testing options include scripted checks and snapshot tests; its headless CLI can run in CI/CD and generate JUnit reports. Projects are kept in structured JSON intended to support Git diffs, reviews, and versioning. Kreya can import Postman and Insomnia collections, plus HAR, cURL, gRPCurl, and grpc web curl data. A reusable authentication vault covers OAuth 2.0, OIDC, Basic, API keys, mTLS, AWS SigV4, Kerberos, NTLM, and JWT Profile. The maker says app data stays on the device, while its privacy policy says the app and CLI collect anonymized telemetry. There is a free plan; Pro is $5 a month. Secret manager integration is marked as coming soon.

ProtoCall is a cloud web app intended to simplify the steps of building APIs with gRPC. It runs in a browser without installation and organizes proto files into workspaces, where packages and imports resolve within one namespace. Users can create a workspace by importing proto files manually or bring in a GitHub repository they own, collaborate on, or can access through organization membership. Imports can track repository changes automatically. ProtoCall supports one repository per workspace, not a combination of repositories. The web app relies on ProtoCall Agent, a local webserver, for outbound requests that browsers cannot make directly because of CORS restrictions. The agent applies its own CORS rules and additional authentication to restrict communication from unauthorized non-browser processes. The agent runs through a Docker container on Windows and macOS, and as a binary executable on Linux. The Free plan costs nothing and supports GitHub imports and manually created workspaces. Listed platforms are Linux, macOS, web, and Windows.