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Dify: the best Open Source alternative to OpenAI API in 2026
Dify is a platform for designing, testing and deploying AI applications (chatbots, agents, flows) with a visual editor and built-in observability, instead of building everything on the raw OpenAI API by hand.
Technical profile
- License
- Apache-2.0
- Category
- Artificial Intelligence
- Replaces
- OpenAI API
- Tech stack
- PythonNext.jsPostgreSQL
Preview
Public image provided by Dify on its own website.
Key features
- Visual editor for AI agents and flows
- Observability and logs for every conversation
- Multi-model: OpenAI, Anthropic, local
Dify vs. OpenAI API
Pros
- Cuts down a lot of the code needed to ship an AI product
Things to consider
- Full production stack has several services (Weaviate/Redis)
Quick Docker installation guide
Copy this docker-compose.yml, adjust the example passwords and run docker compose up -d on your server. See the full step-by-step guide →
docker-compose.yml
version: "3.9"
services:
dify-api:
image: langgenius/dify-api:latest
restart: unless-stopped
ports:
- "5001:5001"
environment:
- DB_HOST=dify-db
- DB_USERNAME=dify
- DB_PASSWORD=dify
- REDIS_HOST=dify-redis
depends_on:
- dify-db
- dify-redis
dify-db:
image: postgres:15-alpine
restart: unless-stopped
environment:
- POSTGRES_USER=dify
- POSTGRES_PASSWORD=dify
- POSTGRES_DB=dify
volumes:
- dify_pg_data:/var/lib/postgresql/data
dify-redis:
image: redis:7-alpine
restart: unless-stopped
volumes:
dify_pg_data: