Best Open Source AI Agent Platforms using Prettier in 2026

Parlant

Build compliant customer-facing AI agents with control

Stars
17,993
Forks
1,528
Last commit
2 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

Flowise AI

Build AI agents and workflows with visual drag-and-drop

Stars
52,100
Forks
24,180
Last commit
6 hours ago

Open source platform for building AI agents, chatbots, and LLM workflows using visual drag-and-drop interface. No coding required for rapid prototyping.

Open Source Alternative to:

n8n

LibreChat

Free AI chat platform for Everyone

Stars
35,812
Forks
7,326
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
30,348
Forks
3,921
Last commit
2 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
19,642
Forks
3,390
Last commit
5 hours 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

Botpress

Build powerful AI agents with cutting-edge LLM technology

Stars
14,639
Forks
2,250
Last commit
10 hours ago

A comprehensive platform for creating AI agents with intuitive tools, extensive integrations, and enterprise-grade features powered by the latest language models.

Open Source Alternative to:

Voiceflow

E2B

Secure cloud environments for enterprise AI agents

Stars
11,812
Forks
864
Last commit
10 hours 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

Nango

Build product integrations with 500+ APIs in hours

Stars
7,149
Forks
687
Last commit
8 hours ago

Complete integrations platform with 500+ pre-built APIs, code-first approach, unified data models, and enterprise-grade security. Free tier available.

Open Source Alternative to:

Rube

Rivet

Build stateful backends with in-memory actors

Stars
5,466
Forks
176
Last commit
6 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

ByteChef

Build AI agents and automate complex workflows seamlessly

Stars
745
Forks
136
Last commit
11 hours ago

Create intelligent automation workflows combining AI agents with your favorite apps and services. Connect, automate, and scale your operations without complex coding.

Open Source Alternative to:

n8n

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
17,993
Forks
1,528
Last commit
2 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

Flowise AI

Build AI agents and workflows with visual drag-and-drop

Stars
52,100
Forks
24,180
Last commit
6 hours ago

Open source platform for building AI agents, chatbots, and LLM workflows using visual drag-and-drop interface. No coding required for rapid prototyping.

Open Source Alternative to:

n8n

LibreChat

Free AI chat platform for Everyone

Stars
35,812
Forks
7,326
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
30,348
Forks
3,921
Last commit
2 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
19,642
Forks
3,390
Last commit
5 hours 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

Botpress

Build powerful AI agents with cutting-edge LLM technology

Stars
14,639
Forks
2,250
Last commit
10 hours ago

A comprehensive platform for creating AI agents with intuitive tools, extensive integrations, and enterprise-grade features powered by the latest language models.

Open Source Alternative to:

Voiceflow

E2B

Secure cloud environments for enterprise AI agents

Stars
11,812
Forks
864
Last commit
10 hours 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

Nango

Build product integrations with 500+ APIs in hours

Stars
7,149
Forks
687
Last commit
8 hours ago

Complete integrations platform with 500+ pre-built APIs, code-first approach, unified data models, and enterprise-grade security. Free tier available.

Open Source Alternative to:

Rube

Rivet

Build stateful backends with in-memory actors

Stars
5,466
Forks
176
Last commit
6 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

ByteChef

Build AI agents and automate complex workflows seamlessly

Stars
745
Forks
136
Last commit
11 hours ago

Create intelligent automation workflows combining AI agents with your favorite apps and services. Connect, automate, and scale your operations without complex coding.

Open Source Alternative to:

n8n

Open Source AI Agent Platforms using Prettier

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