Flask

Lightweight Python web framework that handles routing and templating and leaves the database and other pieces to extensions.

Visit flask.palletsprojects.com ↗Alternatives

Ask your AI about this, with this page as the source:ChatGPT ↗Claude ↗Perplexity ↗

Where it fits

Backend Framework · Minimal routerSmall Python web apps and APIs where you add only the extensions you need.Trade-off: No built-in async-first design, validation or ORM; larger apps end up assembling many extensions.

Who uses it

No maker's live product on record yet, and 114 open-source projects that declare it in their code.

Declared in code 114How evidence is collected →

We haven't found a maker's live product that uses Flask yet — only the open-source projects below, which declare it in their code.

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agents Repo for the Complete Agentic AI Engineering CourseBackend FrameworkIn its code · source ↗

atom Atom Agent, Open-Source Governed AI Agent Platform for Self-Hosted AutomationBackend FrameworkIn its code · source ↗

camel 🐫 CAMEL: The first and the best multi-agent framework. Finding the Scaling Law of Agent…Backend FrameworkIn its code · source ↗

examples Enjoy our curated collection of examples and solutions. Use these patterns to build your…Backend FrameworkIn its code · source ↗

GenerativeAIExamples Generative AI reference workflows optimized for accelerated infrastructure and microserv…Backend FrameworkIn its code · source ↗

illacceptanything The project where literally anything* goes.Backend FrameworkIn its code · source ↗

puppyone-cloud Context drive for your AI agentsBackend FrameworkIn its code · source ↗

youtube_video_code The code for all the YouTube videos I publish on YouTube.Backend FrameworkIn its code · source ↗

continue open-source coding agentBackend FrameworkIn its code · source ↗

omi Open-source AI wearable with mobile and desktop apps that records conversations and meet…Backend FrameworkIn its code · source ↗

PraisonAI PraisonAI 🦞 — Hire a 24/7 AI Workforce. Stop writing boilerplate and start shipping aut…Backend FrameworkIn its code · source ↗

DAMO-ConvAI DAMO-ConvAI: The official repository which contains the codebase for Alibaba DAMO Conver…Backend FrameworkIn its code · source ↗

KnowFlow KnowFlowRAGBackend FrameworkIn its code · source ↗

app-controller App-Controller: Allow users to manipulate your App with natural languageBackend FrameworkIn its code · source ↗

MemoryBear MemoryBear Equip AI with human-like memory capabilityBackend FrameworkIn its code · source ↗

ragflow-plus Ragflow-Plus 是 Ragflow 的二次开发版本，使其更为简洁实用Backend FrameworkIn its code · source ↗

weave Weave is a toolkit for developing AI-powered applications, built by Weights & Biases.Backend FrameworkIn its code · source ↗

adk-recipes A collection of sample agents built with Agent Development Kit (ADK)Backend FrameworkIn its code · source ↗

moss The retrieval layer for production AI systems. Lightning-fast (<10ms) search without vec…Backend FrameworkIn its code · source ↗

ez-ai-agent Automated Penetration Testing with EZ and AgentsBackend FrameworkIn its code · source ↗

minions Big & Small LLMs working togetherBackend FrameworkIn its code · source ↗

data-formulator 🪄 Data Formulator is an interactive AI-powered data analysis system makes it easy to co…Backend FrameworkIn its code · source ↗

HugAgentOS HugAgentOS: The Self-Evolving AgentOS for Ontology-Grounded Trustworthy ReasoningBackend FrameworkIn its code · source ↗

Open source: a project that declares Flask as a dependency in its public code — verifiable, but not necessarily a live product.

Alternatives to Flask

All alternatives by situation →

HonoSmall TypeScript APIs that run on Node, Bun, Deno or edge platforms like Cloudflare Workers.Open sourceFree tier3 makers · backend framework

ExpressNode.js servers where you want a widely documented default and a huge middleware catalog.Open sourceFree tier3 makers · backend framework

FastifyNode.js APIs that want low overhead, JSON-schema request validation and a structured plugin system.Open sourceFree tier

FastAPIPython APIs with request validation and interactive docs generated from type hints.Open sourceFree tier29 makers · backend framework

DjangoPython apps that want an ORM, migrations, auth and an admin panel on day one.Open sourceFree tier36 makers · backend framework

Ruby on RailsFull-stack Ruby apps where one developer builds models, views, jobs and emails with strong conventions.Open sourceFree tier23 makers · backend framework

LaravelPHP apps with ORM, queues, auth scaffolding and an optional paid ecosystem for hosting and admin panels.Open sourceFree tier72 makers · backend framework

NestJSLarger TypeScript backends organized into modules, with dependency injection and decorators.Open sourceFree tier21 makers · backend framework

WaspFull-stack React and Node.js apps where a config file declares auth, routes, jobs and emails and Wasp generates the wiring.Open sourceFree tier6 makers · backend framework

Questions makers ask about Flask

Is Flask free?

Yes — it is free, open-source software.

Is Flask open source or self-hostable?

Open source, and you can self-host it. source ↗

Can AI coding agents work with Flask?

No llms.txt, official MCP server or CLI found yet.

Who uses Flask?

No maker's live product we track yet; 114 open-source projects declare it in their code. source ↗