Open-Source AI Tools

One workflow. Every AI tool.

Define your process once in Cromus, then deploy it across 24 open-source frameworks — from LangGraph and CrewAI to n8n and Ollama — without rewriting a thing.

Agent Frameworks

4 tools

Free
Open Source

LangGraph

Framework for building stateful, multi-actor applications with LLMs using graph-based orchestration.

pythonmulti-agentworkflow-orchestrationrag
Free
Open Source

CrewAI

Framework for orchestrating role-playing autonomous AI agents that collaborate on complex tasks.

pythonmulti-agentworkflow-orchestration
Free
Open Source

AutoGen

Microsoft framework for building multi-agent conversational AI systems.

pythonmulti-agentworkflow-orchestration
Free
Open Source

Semantic Kernel

Microsoft SDK for integrating AI models into applications with plugin architecture.

pythonjavascriptcsharpworkflow-orchestration

Orchestration & LLM Frameworks

3 tools

Free
Open Source

LangChain

Framework for developing applications powered by language models with composable chains.

pythonjavascriptragworkflow-orchestration
Free
Open Source

LlamaIndex

Data framework for connecting custom data sources to large language models.

pythonragworkflow-orchestration
Free
Open Source

Haystack

End-to-end NLP framework for building search and question answering pipelines.

pythonragworkflow-orchestration

Local Inference & Model Runners

4 tools

Self Hosted
Open Source

Ollama

Run large language models locally with simple CLI and API.

local-modelspythonjavascript
Self Hosted
Open Source

vLLM

High-throughput and memory-efficient inference and serving engine for LLMs.

pythonlocal-models
Free

LM Studio

Desktop application for running local LLMs with a user-friendly interface.

local-models
Self Hosted
Open Source

Text Generation Inference

Hugging Face toolkit for deploying and serving LLMs with optimized inference.

pythonlocal-models

Workflow Engines

4 tools

Freemium
Open Source

n8n

Workflow automation platform with visual editor and extensive integration library.

javascriptworkflow-orchestration
Freemium
Open Source

Prefect

Modern workflow orchestration tool for data pipelines and ML workflows.

pythonworkflow-orchestration
Free
Open Source

Apache Airflow

Platform for programmatically authoring, scheduling, and monitoring workflows.

pythonworkflow-orchestration
Freemium
Open Source

Temporal

Durable execution platform for building reliable distributed applications.

pythonjavascriptworkflow-orchestration

Search & Retrieval Tools

2 tools

Freemium

Tavily

Search API built specifically for AI agents and RAG applications.

pythonjavascriptrag
Self Hosted
Open Source

SearXNG

Privacy-respecting, self-hosted metasearch engine.

pythonrag

Vector Databases

4 tools

Freemium
Open Source

Qdrant

High-performance vector similarity search engine and database.

pythonjavascriptraglocal-models
Freemium
Open Source

Weaviate

Cloud-native vector database with built-in ML model integration.

pythonjavascriptrag
Free
Open Source

Chroma

AI-native open-source embedding database for building AI applications.

pythonjavascriptrag
Freemium
Open Source

Milvus

Scalable open-source vector database for AI and ML workloads.

pythonrag

Developer Tools

3 tools

Free
Open Source

Continue.dev

Open-source AI code assistant for VS Code and JetBrains.

javascriptpythonlocal-models
Self Hosted
Open Source

Open WebUI

Self-hosted web interface for interacting with local and remote LLMs.

local-modelspython
Freemium
Open Source

Dify

Open-source LLM app development platform with visual workflow builder.

pythonjavascriptworkflow-orchestration

Build once. Adapt anywhere.

Cromus helps teams standardize workflows across LangGraph, CrewAI, n8n, local model stacks, and more.

Ready to explore?

Browse workflow templates or start building your own multi-tool AI workflows.