Open-Source AI

Eidolon AI

free

Eidolon is an Apache-2.0 Python SDK and agent server that packages agents as HTTP services, supports agent-to-agent tool calls, and lets developers swap models, retrieval, tools, and other components.

KaibanJS

free

KaibanJS lets JavaScript developers define agents, tools, tasks, and teams in code, run multi-step workflows, inspect state and logs, and visualize execution in a Kanban-inspired board.

Jan

free

Jan is an Apache-2.0 desktop application for downloading and running compatible models locally, chatting with them, connecting optional cloud providers, and exposing a local OpenAI-compatible API.

Supercog

free

Supercog provides a hosted agent workspace and the open-source Agentic framework for building tool-using agents with APIs, event streams, teams, human review, RAG, dashboards, and production-oriented tools.

Bloop AI

free

Bloop AI is an AI-powered code search and comprehension tool that helps developers quickly understand and navigate large codebases through natural language search and human-like explanations.

GenSphere

free

GenSphere is an MIT-licensed Python framework for defining LLM applications as YAML graphs whose nodes can call functions, model APIs, or nested graphs, with visualization and an open push-and-pull project hub.

MagickML

usage based

MagickML provides a visual node builder for creating AI-agent workflows, combining model choice, document processing, custom nodes, event-driven execution, integrations, testing, and deployment with open-source code and hosted metered billing.

PydanticAI

free

PydanticAI is an open-source Python SDK for building typed AI agents and model-powered applications with tools, structured outputs, multiple model providers, and evaluation support.

Langflow

free

Langflow is an MIT-licensed Python framework with a visual editor for assembling agents, retrieval pipelines, tools, models, and APIs, then running or serving the resulting flows.

Agno

freemium

Agno provides Python primitives for agents, teams, and workflows plus AgentOS for serving them through APIs, MCP, chat interfaces, and operational controls.

Letta

freemium

Letta provides an agent harness, applications, and developer interfaces for building stateful agents whose memory, identity, tools, and conversations persist over time.

DSPy

free

DSPy is an open-source Python framework for composing language-model programs from signatures and modules, then optimizing prompts and examples against developer-defined metrics.

Mem0

freemium

Mem0 provides hosted and open-source memory infrastructure that stores, updates, and retrieves user, session, and agent context across interactions through APIs and framework integrations.

Chroma

usage based

Chroma stores documents, embeddings, and metadata and supports dense, sparse, hybrid, full-text, regex, metadata, and multimodal retrieval through an Apache-2.0 project and serverless cloud service.

Qdrant

freemium

Qdrant is a Rust-based vector search engine and managed platform for dense, sparse, hybrid, filtered, multivector, and reranked retrieval across cloud, hybrid, private, and self-hosted deployments.

Milvus

free

Milvus is an Apache-2.0 vector database for storing vectors and related scalar data, running approximate nearest-neighbor search, and scaling from an embedded local library to standalone or distributed deployments.

Weaviate

freemium

Weaviate stores data objects and vector embeddings for semantic and hybrid search, retrieval-augmented generation, and agent workflows, with open-source self-hosting and managed cloud plans.

Nullify

free

Nullify is an AI-driven application security platform designed to assist small security teams in automating the detection, prioritization, and remediation of security vulnerabilities throughout the development lifecycle, enhancing efficiency and security posture.

Daizy

free

Daizy provides AI agents designed to enhance marketing, sales, and research efforts within financial services, automating tasks such as content generation and client engagement to increase productivity.

GOAT SDK

free

GOAT SDK is an MIT-licensed TypeScript and Python toolkit with wallet adapters, agent-framework adapters, and plugins for payments, tokens, markets, data, and other onchain actions.

smolagents

free

Hugging Face smolagents is a lightweight Python library for CodeAgent and ToolCallingAgent workflows, with model-provider adapters, custom tools, multi-agent patterns, Hub integration, and optional sandbox backends.

Griptape Framework

free

Griptape Framework supplies modular Python abstractions for agents, sequential pipelines, parallel workflows, tools, memory, retrieval, evaluation, multimodal engines, and swappable model, data, storage, and observability drivers.

QuantaLogic

free

QuantaLogic is an advanced AI agent framework that combines reasoning and action (ReAct) to enable developers to build intelligent agents capable of understanding, reasoning, and executing complex tasks through natural language interactions.

Khoj

freemium

Khoj is a self-hostable personal AI application that can search and chat across local documents and the web, use local or hosted models, create custom agents, schedule research automations, and run through web, desktop, Obsidian, Emacs, mobile, and WhatsApp interfaces.