Best Open Source AI Agent Platforms using Python in 2026

Parlant

Build compliant customer-facing AI agents with control

Stars
17,984
Forks
1,527
Last commit
15 hours ago

Conversational AI engine that keeps agents business-aligned and compliant as you scale. Build adaptive agents through feedback-driven development.

Open Source Alternative to:

Voiceflow

Langflow

Visual builder for AI-powered applications and workflows

Stars
147,137
Forks
8,804
Last commit
6 hours ago

Low-code platform for building agentic and RAG applications with drag-and-drop components, Python customization, and support for any LLM or vector database.

Open Source Alternative to:

Voiceflow

Agno

Model-agnostic platform for building intelligent AI agents

Stars
39,531
Forks
5,270
Last commit
13 hours ago

Open-source platform that enables developers to create, deploy and monitor AI agents with built-in memory, knowledge integration, and external tool connectivity.

Open Source Alternative to:

Kiro

LibreChat

Free AI chat platform for Everyone

Stars
35,779
Forks
7,319
Last commit
4 hours ago

Free, open source AI chat platform compatible with any AI provider. Offers a wide range of features, including agents, code interpreter, and multimodal capabilities.

Open Source Alternative to:

Grok

CopilotKit

Build AI copilots for your product in hours, not months

Stars
30,337
Forks
3,920
Last commit
5 hours ago

Integrate production-ready AI copilots into any product quickly and easily with CopilotKit's open-source platform.

Open Source Alternative to:

LangChain

Suna

AI agent that autonomously handles real-world tasks

Stars
19,640
Forks
3,388
Last commit
1 day ago

Open source AI assistant that executes complex tasks from market research to travel planning through natural conversation, with full transparency and community-driven development.

Open Source Alternative to:

Manus

Letta

Build and deploy AI agents with advanced memory

Stars
22,168
Forks
2,345
Last commit
8 days ago

Letta is an open-source platform for creating AI agents with built-in memory, reasoning, and support for thousands of tools.

Open Source Alternative to:

Perplexity

E2B

Secure cloud environments for enterprise AI agents

Stars
11,787
Forks
861
Last commit
3 days ago

Provide AI agents with secure, isolated sandboxes featuring real-world tools, code execution, and enterprise-grade security. Trusted by 88% of Fortune 100 companies.

Open Source Alternative to:

Modal

Rivet

Build stateful backends with in-memory actors

Stars
5,465
Forks
176
Last commit
9 hours ago

Open-source infrastructure for long-lived, in-memory processes called Actors. Combines state and compute with sub-millisecond latency, realtime capabilities, and horizontal scaling.

Open Source Alternative to:

Cloudflare Workers

ACI.dev

Build reliable AI agents with unified tool integration

Stars
4,753
Forks
455
Last commit
3 months ago

Platform for connecting AI agents to 500+ tools with built-in multi-tenant auth management and granular permissions using either function calling or a unified MCP server

Open Source Alternative to:

Rube

Stars
Forks
Last commit

Stars
Forks
Last commit

Stars
Forks
Last commit

Stars
Forks
Last commit

Stars
Forks
Last commit

Stars
Forks
Last commit

Parlant

Build compliant customer-facing AI agents with control

Stars
17,984
Forks
1,527
Last commit
15 hours ago

Conversational AI engine that keeps agents business-aligned and compliant as you scale. Build adaptive agents through feedback-driven development.

Open Source Alternative to:

Voiceflow

Langflow

Visual builder for AI-powered applications and workflows

Stars
147,137
Forks
8,804
Last commit
6 hours ago

Low-code platform for building agentic and RAG applications with drag-and-drop components, Python customization, and support for any LLM or vector database.

Open Source Alternative to:

Voiceflow

Agno

Model-agnostic platform for building intelligent AI agents

Stars
39,531
Forks
5,270
Last commit
13 hours ago

Open-source platform that enables developers to create, deploy and monitor AI agents with built-in memory, knowledge integration, and external tool connectivity.

Open Source Alternative to:

Kiro

LibreChat

Free AI chat platform for Everyone

Stars
35,779
Forks
7,319
Last commit
4 hours ago

Free, open source AI chat platform compatible with any AI provider. Offers a wide range of features, including agents, code interpreter, and multimodal capabilities.

Open Source Alternative to:

Grok

CopilotKit

Build AI copilots for your product in hours, not months

Stars
30,337
Forks
3,920
Last commit
5 hours ago

Integrate production-ready AI copilots into any product quickly and easily with CopilotKit's open-source platform.

Open Source Alternative to:

LangChain

Suna

AI agent that autonomously handles real-world tasks

Stars
19,640
Forks
3,388
Last commit
1 day ago

Open source AI assistant that executes complex tasks from market research to travel planning through natural conversation, with full transparency and community-driven development.

Open Source Alternative to:

Manus

Letta

Build and deploy AI agents with advanced memory

Stars
22,168
Forks
2,345
Last commit
8 days ago

Letta is an open-source platform for creating AI agents with built-in memory, reasoning, and support for thousands of tools.

Open Source Alternative to:

Perplexity

E2B

Secure cloud environments for enterprise AI agents

Stars
11,787
Forks
861
Last commit
3 days ago

Provide AI agents with secure, isolated sandboxes featuring real-world tools, code execution, and enterprise-grade security. Trusted by 88% of Fortune 100 companies.

Open Source Alternative to:

Modal

Rivet

Build stateful backends with in-memory actors

Stars
5,465
Forks
176
Last commit
9 hours ago

Open-source infrastructure for long-lived, in-memory processes called Actors. Combines state and compute with sub-millisecond latency, realtime capabilities, and horizontal scaling.

Open Source Alternative to:

Cloudflare Workers

ACI.dev

Build reliable AI agents with unified tool integration

Stars
4,753
Forks
455
Last commit
3 months ago

Platform for connecting AI agents to 500+ tools with built-in multi-tenant auth management and granular permissions using either function calling or a unified MCP server

Open Source Alternative to:

Rube

Open Source AI Agent Platforms using Python

A curated collection of the best open source platforms for creating and managing autonomous AI agents. using Python.