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LLM app builders

Build chatbots, agents and RAG workflows in a visual editor and serve them behind an API.

Side by side

LLM app builders
ToolStarsLicenceTermsSelf-hostedLanguageLatestLast push
Dify158kOtherSource availableYesTypeScript1.17.12026-10-06
Langflow156kMITOpen sourceYesPythonv1.12.42026-10-06
Sim30kApache-2.0Open sourceYesTypeScriptv0.9.142026-10-06
FastGPT30kOtherSource availableYesTypeScriptv4.17.12026-10-06
MaxKB23kGPL-3.0Open sourceYesPythonv2.10.6-lts2026-10-04
Coze Studio22kApache-2.0Open sourceYesTypeScriptv0.5.12026-07-29
BISHENG12kApache-2.0Open sourceYesPythonv2.6.0-fix22026-09-30
Rivet4.7kMITOpen sourceYesTypeScriptapp-v1.11.32026-08-26

8 tools

Dify

Build Agentic workflows, RAG pipelines, with rich AI model and tool support on one collaborative workspace. Deploy on cloud, VPC, or self-hosted, so teams move from prototype to production without rebuilding the stack.

Language
TypeScript
Licence
Other
Stars
158k
Latest
1.17.1
Last push
2026-10-06
Langflow

Langflow is a powerful tool for building and deploying AI-powered agents and workflows.

Language
Python
Licence
MIT
Stars
156k
Latest
v1.12.4
Last push
2026-10-06
Sim

Sim is the collaborative workspace to build, deploy, and monitor AI agents and workflows. Used by 100,000+ builders.

Language
TypeScript
Licence
Apache-2.0
Stars
30k
Latest
v0.9.14
Last push
2026-10-06
FastGPT

FastGPT is a knowledge-based platform built on the LLMs, offers a comprehensive suite of out-of-the-box capabilities such as data processing, RAG retrieval, and visual AI workflow orchestration, letting you easily develop and deploy complex question-answering systems without the need for extensive setup or configuration.

Language
TypeScript
Licence
Other
Stars
30k
Latest
v4.17.1
Last push
2026-10-06
MaxKB

🔥 MaxKB is an open-source platform for building enterprise-grade agents. 强大易用的开源企业级智能体平台。

Language
Python
Licence
GPL-3.0
Stars
23k
Latest
v2.10.6-lts
Last push
2026-10-04
Coze Studio

An AI agent development platform with all-in-one visual tools, simplifying agent creation, debugging, and deployment like never before. Coze your way to AI Agent creation.

Language
TypeScript
Licence
Apache-2.0
Stars
22k
Latest
v0.5.1
Last push
2026-07-29
BISHENG

BISHENG is an open LLM devops platform for next generation Enterprise AI applications. Powerful and comprehensive features include: GenAI workflow, RAG, Agent, Unified model management, Evaluation, SFT, Dataset Management, Enterprise-level System Management, Observability and more.

Language
Python
Licence
Apache-2.0
Stars
12k
Latest
v2.6.0-fix2
Last push
2026-09-30
Rivet

The open-source visual AI programming environment and TypeScript library

Language
TypeScript
Licence
MIT
Stars
4.7k
Latest
app-v1.11.3
Last push
2026-08-26

What these tools replace