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CrewAI

CrewAI, Inc. · Agent frameworks & orchestration

Open-source Python framework for role-based multi-agent crews and event-driven flows, with a commercial enterprise console for deploying, monitoring and triggering automations

MITOpen sourceFreemiumLocalSelf-hostedNov 2, 2026

Hugging Face Hub

Hugging Face · Training & fine-tuning

In-depth entry

Hosting platform for open models, datasets and Spaces demo apps built on git repositories and Xet storage, with Inference Providers, Endpoints, Jobs and an open-source Python client and CLI

MixedFreemiumPaidLocalNov 2, 2026

LangGraph

LangChain, Inc. · Agent frameworks & orchestration

In-depth entry

Low-level orchestration framework and runtime for stateful, long-running agents expressed as graphs, with durable execution, checkpointing, human-in-the-loop and streaming

MITOpen sourceFreeLocalSelf-hostedNov 2, 2026

LiteLLM

BerriAI · Prompting, evaluation & observability

In-depth entry

Open-source Python SDK and self-hosted AI gateway that calls 100+ LLM providers in the OpenAI format, with routing, fallbacks, virtual keys, budgets, spend tracking and logging callbacks

MITOpen sourceFreeLocalSelf-hostedNov 2, 2026

LlamaIndex

LlamaIndex, Inc. · Agent frameworks & orchestration

Open-source Python framework for retrieval-augmented agents over your data, with connectors, indexes, query engines and event-driven workflows, alongside the commercial LlamaParse document platform

MITOpen sourceFreeLocalSelf-hostedNov 2, 2026

Milvus

Zilliz / LF AI & Data Foundation · Vector databases

Open-source vector database from Zilliz with Lite, Standalone and Distributed deployments, many index types and GPU acceleration

Apache-2.0Open sourceFreeLocalSelf-hostedNov 2, 2026

promptfoo

Promptfoo, Inc. · Prompting, evaluation & observability

Open-source, local-first CLI and library for evaluating prompts, models, RAG pipelines and agents, with automated red teaming and CI integration

MITOpen sourceFreeLocalSelf-hostedBroken

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