Compare AI tools

	Manus S	Perplexity S	HeyGen S	NotebookLM S
Tagline	Autonomous AI agent that actually finishes tasks.	AI search done right. Cited answers, not chat theater.	AI avatar videos. Record once, speak any language.	Google's research notebook. Turns your docs into a podcast.
Category	agents	research	video	research
Pricing	Free tier + $39-$199/mo	Free + $20/mo Pro	Free + $24-$65/mo	Free
Best for	People who want to hand off tasks entirely — trip planning, research, spreadsheet building.	Replacing Google for any question where you want a cited answer in seconds.	Course creators, multilingual marketers, anyone scaling video content.	Students, researchers, anyone with a stack of PDFs or a topic to learn.
Strengths	General-purpose agent — research, book, build, analyze Parallel task execution Web browsing + file creation + coding	Sources every claim Fast, current answers Pro Search runs multi-step research Spaces for persistent context	Clone your face + voice in 2 minutes Instant translation into 40+ languages with lip sync Avatars look less uncanny than competitors	Upload anything, ask questions, get cited answers Audio Overview turns docs into a 10-min podcast Great for studying
Weaknesses	Still hit-or-miss on complex multi-hour tasks Can burn credits fast	Not a general chatbot Answers can be shallow on complex topics	Pricey for serious volume Long shots still feel off Ethics — easy to misuse	Google-only Can be slow on large corpora
Kai's verdict	S-tier in the agent category. The first one I'd give to a non-technical friend.	S-tier for search. I use it before Google now. If you're still Googling everything, try this for a week.	S-tier for multilingual video. If you sell courses or speak at events, this is a cheat code.	S-tier for study. The Audio Overview is a killer feature. Try it with three of your favorite PDFs.
Link	Open →	Open →	Open →	Open →