Skip the hype. Find AI software for your next project.

Unlimited AI-generated Cambridge English practice with instant feedback

Learn Linux, DevOps, and cybersecurity by doing — inside real online labs.

Study smarter for IELTS, TOEIC and HSK with AI speaking and writing rooms

VRAM, throughput and GPU cost calculators plus courses for open-weight LLM deployment

A free place to study the Bible with an AI assistant

Build, simulate, evaluate and monitor self-improving AI agents

Ace the Duolingo English Test with AI scoring and 18,000+ practice questions

Learn to code by doing, with AI support inside every lesson

AI-coached CASPer practice questions and full mock tests

Cloud Linux VMs built for developers and their AI agents

AI-graded TOEFL practice tests with instant scores and feedback

Courses and best practices for building AI-powered products end to end

Autonomous AI QA agents that verify your web and mobile app on every pull request

Find and fix problems in your AI agents before users do

Autonomous penetration testing and AI red teaming beyond human limits

AI-powered diagnostic practice tests for SAT®, ACT®, PSAT/NMSQT® and AP® — scored in about 40 minutes

Open-source, OpenTelemetry-native observability and harness engineering for AI agents

Turn your notes into interactive AI quizzes

Learn to code with AI-guided Python practice

One workbench for 19 image models and 23 video models, priced in credits you can see

Hands-on, visual tutorials for learning neural networks and deep learning

Pass your Dutch driving theory exam the first time with online lessons, quizzes, and practice exams

Learn DevOps and SRE by solving real terminal challenges

Hands-on AI courses for building real LLM, RAG, and agent applications