Alternatives to Boundary ML

Build agentic AI apps in TypeScript, Go, Python, or Dart with Genkit's open-source AI SDK.

Build production AI agents with open source Python and TypeScript harness SDKs you fully control.

Pydantic AI is the typed, open-source Python agent framework that returns Pydantic-validated objects from every run.

Fenic turns messy text into typed, queryable Semantic DataFrames with LLM-powered extraction, classification, and semantic joins in Python.

Open Harness is an MIT-licensed TypeScript SDK for building Claude Code-style agents with stateless primitives and composable middleware.

Open-source TypeScript AI SDK for streaming AI apps and agents across 100+ models with built-in fallbacks

Rig is an open-source Rust LLM framework for building type-safe AI agents with one unified API across 20+ model providers.

Mellea turns type-annotated Python functions into validated, testable LLM calls with token-level constrained decoding.

Python agent framework for small language models — local engines, OpenAI-compatible servers, or hosted providers, with tool-call tracing

Go SDK for AI apps: one type-safe API for text generation, streaming, tools and MCP across 25+ LLM providers.

xsAI is an extra-small OpenAI-compatible AI SDK for JavaScript and TypeScript — 13.1 KB gzipped with every package included.

Marvin turns ordinary Python functions, classes, and Pydantic models into LLM-powered AI tasks with decorators like @ai_fn and

Mirascope is an open-source Python library that turns LLM calls, tools, and prompt versioning into plain decorated functions.

Open-source Python library that constrains LLM decoding so JSON, regex, and grammar outputs are valid on the first call.

Open-source Python library that constrains LLM output with regex, context-free grammars, and inline control flow.

Free, MIT-licensed OpenAI API examples and Python notebooks for developers building with the OpenAI API.

Open-source LLM from UC Berkeley that turns natural language into API calls and tool-using agent actions.

Open-source (MIT) MCP testing and full-stack MCP App framework for building ChatGPT Apps and Claude Connectors from one React codebase.

Power BI AI skills and subagents for Claude Code and GitHub Copilot users.

Open-source React toolkit for generative UI that renders your own components from natural language

flompt is a free visual prompt builder that compiles prompts into Claude-optimized XML blocks

Open-source React framework for agent chat, generative UI, and shared state on any AG-UI backend.

Eino is an open-source Go LLM framework from ByteDance for building agents, graphs, and RAG pipelines in your existing Go backend.

OpenUI turns AI agent responses into streaming generative UI built from your own component library.

社区自建的LangChain中文文档镜像站，把v0.3框架、LCEL和RAG、SQL问答等场景示例译成中文，帮中文开发者入门LLM应用开发。

Tiptap AI Toolkit lets AI agents edit rich-text documents in place with schema-aware, reviewable patches.

Open-source Rust library for building streaming, parallel LLM pipelines — data indexing, retrieval-augmented generation, and autonomous agents.

LeanCTX is a local MCP context gateway that filters and compresses what your AI coding agent reads before the request leaves your machine.

A headless React hooks library that runs Vicuna-13B chat entirely in your browser via WebGPU, with no prompt or completion leaving the client.

Free browser markdown editor with Battle Mode for comparing OpenAI, Claude, and Gemini prompt outputs, client-side only.