Kreya alternatives

Scalar provides a modern toolkit for API documentation, request testing, and developer-facing API experiences built around OpenAPI.

Stainless generates and maintains best-in-class SDKs for API companies, powering the official client libraries for companies like OpenAI, Cloudflare, and Lithic.

Rich framework for building applications and services in Node.js with a powerful plugin system and configuration-centric design.

Unified API for creating diagrams from textual descriptions supporting 20+ diagram types including Mermaid and PlantUML.

WhatsApp Business API provider offering direct API access, messaging hub, analytics dashboard, and partner program for developers and agencies.

Software licensing and distribution API for developers with flexible license models, machine fingerprinting, and entitlement management.

Simple transactional email API focused on deliverability with no tracking pixels, DKIM/SPF setup, and developer-friendly REST and SMTP access.

Investing platform providing retail trading of stocks, crypto, and alternative assets with social features.

Multi-chain NFT and token API providing indexed data for Web3 apps, wallets, and marketplaces.

Shipping API for developers with multi-carrier rate comparison, label generation, and tracking across global carriers.

Headless CMS and API toolkit for building web and mobile apps with content.

E-invoicing network and API platform offering Peppol access point services for developers and enterprises.

Energy data platform that connects utility accounts to provide standardized energy usage data and bill management APIs.

Human-friendly command-line HTTP client for API testing providing intuitive syntax and JSON support.

Server-side Swift web framework providing a modern and type-safe API for building HTTP servers and backends.

Real-time search API for Google, YouTube, Bing, and Amazon providing structured data to developers.

Intuitive desktop API client for REST, GraphQL, and gRPC with Git-friendly storage and template variables.

Search engine results API providing structured data from Google, Bing, and other search engines for developers.

Service that turns Google Sheets into a database API for building quick prototypes and internal tools.

Simple web framework for Java and Kotlin with an embedded Jetty server and a functional-style API.

High-performance open source RPC framework by Google supporting multiple languages with protobuf serialization.

Search API platform for AI agents with real time grounded web results

Fast and minimal GraphQL framework for building high-performance GraphQL servers in Node.js.

Live streaming platform for gaming creators with bits, subscriptions, and extensions for monetization.