Compare AI tools

	Perplexity S	Fathom S	Groq S	ChatGPT Operator B
Tagline	AI search done right. Cited answers, not chat theater.	Meeting notes, free forever for individuals.	The fastest AI inference in the world. Crazy low latency.	OpenAI's browser agent. Clicks and types on websites for you.
Category	Research	Meetings	Dev Platform	Agents
Pricing	Free + $20/mo Pro	Free for individuals + $15-$29/user/mo teams	Free tier + pay-as-you-go API	Included with ChatGPT Pro $200/mo
Best for	Replacing Google for any question where you want a cited answer in seconds.	Solo operators, freelancers, small teams on a budget.	Developers who need sub-100ms LLM responses.	Power users willing to pay $200/mo for a browser bot.
Strengths	Sources every claim Fast, current answers Pro Search runs multi-step research Spaces for persistent context	Unlimited free tier for solo use Strong summaries + action items Works in Zoom, Meet, Teams	500+ tokens/sec on Llama/Mixtral — feels instant Custom LPU hardware Great free tier	Actually uses websites — fills forms, clicks, checks out Built into ChatGPT Good for repetitive web tasks
Weaknesses	Not a general chatbot Answers can be shallow on complex topics	Bot-joining model Team features gated	Open-weight models only (no Claude/GPT) Less flexibility on custom configs	Slow vs doing it yourself Breaks on complex auth flows $200/mo gate
Kai's verdict	S-tier for search. I use it before Google now. If you're still Googling everything, try this for a week.	S-tier for solo + free. The best free option, hands down.	S-tier for speed. When latency is the product, start here.	B-tier. Still early. Manus is more flexible for less money.
Link	Open →	Open →	Open →	Open →