Langbase

LangChain

4.7

Open-source framework and managed observability platform (LangSmith) for building production-grade LLM applications and AI agents, with tracing, evaluation, and deployment used by 6,000+ enterprise customers.

Flowise

4.4

Open source platform for building AI agents and LLM applications visually with drag-and-drop workflow tools and multi-agent orchestration.

Google Vertex AI

4.4

Google Cloud's unified ML platform for training, deploying, and managing ML models and generative AI applications with Gemini and 150+ models.

Vercel AI SDK

4.4

TypeScript toolkit for building AI-powered applications. Provides unified API for calling any LLM, streaming UI components, structured data generation, and tool calling.

Plandex

4.4

Open-source, terminal-based AI coding agent designed for large projects. Features a 2M token context window, cumulative diff review sandbox, and multi-model support across 30+ languages.

Langflow

4.4

Open-source, low-code visual builder for creating and deploying AI agents and RAG applications, with a drag-and-drop interface backed by full Python customization and 100+ component integrations.