# Few Threads

> Few Threads is an AI-powered system design studio in the browser. Users design software architectures on an infinite canvas, generate designs from natural-language prompts, simulate traffic and chaos failures, estimate cloud costs, and learn distributed systems through lessons, quizzes and timed interview practice.

The name comes from the idea that every large system is a few threads — requests, queues, replicas, connections — woven together well. Pull one thread (crash a node, partition a network) and you learn what the design really depends on.

## What you can do

- **AI architecture generator**: describe requirements in plain English; the AI co-pilot places and connects components on the canvas.
- **AI design review**: feedback on single points of failure, scaling bottlenecks, caching, and cost (powered by Llama 3.3 via Groq, with Gemini as fallback).
- **High-level design canvas**: 169+ components (API gateways, load balancers, Kafka, Redis, PostgreSQL, Kubernetes, CDNs, and more) connected with HTTP, gRPC, WebSocket and TCP links, with live packet-flow animation.
- **Chaos engineering lab**: 30 scenarios including database crashes, split-brain partitions and latency spikes, with throughput, p99 latency and error-rate metrics.
- **Cloud cost estimator**: monthly estimates for AWS, GCP and Azure as replicas and traffic change.
- **Low-level design**: ERD schema builder, REST/GraphQL API design, UML class and sequence diagrams.
- **Academy**: 7 tracks (System Design Fundamentals, Backend Engineering, Distributed Systems, Cloud Architecture, Security Engineering, DevOps & SRE, Interview Preparation), 245 quizzes.
- **Interview mode**: timed 45–60 minute system design challenges with hints and AI follow-up questions.

## Links

- [Home](https://fewthreads.com/)
- [Create a free account](https://fewthreads.com/register)
- [Log in](https://fewthreads.com/login)

Guest mode gives an instant workspace without sign-up.