Build apps

This section covers how to build different types of apps with Flyte, from single-script apps to multi-file projects, common usage patterns, and authentication.

Go to Introducing apps for an overview of apps and a quick example. For pre-built environments for popular frameworks like Streamlit, FastAPI, vLLM, SGLang, and Ollama, see Native app integrations.

App types

Flyte supports various types of apps:

  • UI dashboard apps: Interactive web dashboards and data visualization tools like Streamlit and Gradio
  • Web API apps: REST APIs, webhooks, and backend services like FastAPI and Flask
  • Model serving apps: High-performance LLM serving with vLLM and SGLang, or lightweight serving with Ollama
    • Connector apps: Long-running services that delegate task execution to external systems

For ready-to-use environments for these frameworks, see Native app integrations.

Usage patterns

Apps and tasks can interact in various ways: calling each other via HTTP, webhooks, WebSockets, or direct browser usage.

Pattern Use Case Implementation
App Stand-alone serving app HTTP requests from arbitrary clients
App → App Microservices, proxies, agent routers, LLM routers HTTP requests between apps
App → Task Webhooks, APIs triggering workflows Flyte SDK in app
Task → App Batch processing using inference services HTTP requests from task
Browser app User-facing dashboards (e.g. Streamlit, Gradio) Direct browser access

Next steps

Docs: unionai/unionai-docs 2.6.0.0SDK: flyteorg/flyte-sdk 2.6.0 flyteplugins-union 0.7.1