Short answer: most popular AI tools need the cloud. Offline AI is possible with local runtimes such as Ollama, LM Studio, and Open WebUI, but you trade convenience for hardware, model setup, and slower updates.
Cloud-first tools
ChatGPT, Claude, Perplexity, Canva, Riverside, and most SaaS assistants require an internet connection for the core AI features. They are easier to start, but your inputs leave the device under that plan’s terms.
Local-first tools
Ollama, LM Studio, and Open WebUI can run models on your own hardware. Use the Local AI Workbench Planner before buying a Mac, GPU workstation, or mini PC.
The practical test
- Pick the exact workflow: private notes, coding help, summarization, or chat.
- Choose one model size you can actually run.
- Measure response speed on your hardware.
- Only then decide if offline is worth the maintenance.