Compare AI tools

	Cartesia S	Fathom S	ChatGPT Operator B	Perplexity S
Tagline	Ultra-low-latency voice. Built for realtime agents.	Meeting notes, free forever for individuals.	OpenAI's browser agent. Clicks and types on websites for you.	AI search done right. Cited answers, not chat theater.
Category	Voice	Meetings	Agents	Research
Pricing	Free tier + usage-based API	Free for individuals + $15-$29/user/mo teams	Included with ChatGPT Pro $200/mo	Free + $20/mo Pro
Best for	Developers building voice agents, phone bots, interactive apps.	Solo operators, freelancers, small teams on a budget.	Power users willing to pay $200/mo for a browser bot.	Replacing Google for any question where you want a cited answer in seconds.
Strengths	< 90ms latency — the fastest in the market Sonic model sounds natural Developer-friendly API	Unlimited free tier for solo use Strong summaries + action items Works in Zoom, Meet, Teams	Actually uses websites — fills forms, clicks, checks out Built into ChatGPT Good for repetitive web tasks	Sources every claim Fast, current answers Pro Search runs multi-step research Spaces for persistent context
Weaknesses	Fewer voices than ElevenLabs Less consumer-facing brand	Bot-joining model Team features gated	Slow vs doing it yourself Breaks on complex auth flows $200/mo gate	Not a general chatbot Answers can be shallow on complex topics
Kai's verdict	S-tier for realtime. If latency matters more than voice catalog, start here.	S-tier for solo + free. The best free option, hands down.	B-tier. Still early. Manus is more flexible for less money.	S-tier for search. I use it before Google now. If you're still Googling everything, try this for a week.
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