Perplexity AI is a conversational search engine that analyzes the web in real time and provides sourced answers. Free plan available, Pro at $20/month.

YouChat is a private AI search engine with chatbot, writing, and image generation. Systematic citations, zero tracking. Free plan.

ProWritingAid analyzes your writing with 25+ style reports, grammar correction, and AI rewriting. Lifetime license at $299. Scrivener integration.