Alternatives to Tambo

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

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

Open-source AI SDK and toolkit for building agentic apps and agents in TypeScript, Go, Python, and Dart.

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

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

Open-source multi-agent framework that assigns PM, architect, engineer and QA roles to LLMs for structured software tasks

Mastra is an open-source TypeScript agent framework for durable agents, typed workflows, and built-in evals.

SmolAgents is Hugging Face's open-source Python library for building code-writing AI agents in a few lines of code.

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

Open-source, self-hosted agentic data assistant that connects to your databases, writes SQL and code, and runs analysis in sandboxes

Microsoft's open-source SDK for building AI agents and copilots with plugins, memory, and multi-agent orchestration.

Guidance is an open-source Python library for constrained LLM generation with regex, context-free grammars, and inline control flow.

Microsoft's open-source, code-first Python framework for building stateful, data-intensive conversational AI agents.

Hermes Desktop is a free, open-source desktop GUI for the Hermes Agent — a self-hosted AI agent with a built-in learning loop that turns

Hermes Agent is an open-source, self-hosted AI agent with persistent memory that auto-builds reusable skills and reaches you on 20+ chat

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

Open-source, self-hosted AI agent that plans tasks, runs tools, and grows its own long-term memory.

DeerFlow is an open-source SuperAgent harness that researches, codes, and creates inside a persistent Docker sandbox.

Open-source AI agent loop that iterates a task list in Docker Sandboxes and commits the results.

Open-source library of 817 structured cybersecurity skill files your AI coding agent loads on demand, mapped to MITRE ATT&CK and licensed Apache 2.0.

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

Open source Python and TypeScript SDKs for building production AI agent harnesses you control end to end.

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

Open Strawberry is a free, open-source chain-of-thought inspector for reading, diffing, and comparing model reasoning traces across six LLM

Open-source Java library that puts a unified LLM and vector store API inside your JVM app

Open-source Django library for adding LLM assistants, chat, RAG, and Tool Calling to your existing app

Zhipu GLM is a full-stack large-model platform with open-weights GLM-5.3 coding models, MaaS APIs and autonomous agents.

A free, MIT-licensed Python framework from OpenAI for building multi-agent workflows with handoffs, guardrails, and tracing.

BAML is a type-safe, Turing-complete language for agentic and LLM code that compiles typed Python and TypeScript SDKs.

OpenAI Cookbook delivers free, MIT-licensed Python notebooks and guides for building with the OpenAI API.