Compare AI tools

	Elicit S	Devin A	Fathom S	Grok A
Tagline	AI research assistant for academic literature.	Cognition Labs' autonomous coding engineer.	Meeting notes, free forever for individuals.	xAI's chatbot. Real-time X/Twitter data + fewer refusals.
Category	Research	Agents	Meetings	Chatbots
Pricing	Free + $12-$42/mo	$500/mo	Free for individuals + $15-$29/user/mo teams	Free + $30/mo SuperGrok + included with X Premium
Best for	Grad students, researchers, anyone doing literature reviews.	Engineering teams offloading tickets. Ops/platform work.	Solo operators, freelancers, small teams on a budget.	Breaking news, live event tracking, users already on X.
Strengths	Searches 125M+ papers Extracts + synthesizes findings across papers Systematic review workflow	Works like an engineer — takes Slack tasks, opens PRs Handles multi-hour engineering work Reports back with what it did	Unlimited free tier for solo use Strong summaries + action items Works in Zoom, Meet, Teams	Live access to X posts for real-time events Less restrictive on edgy questions Fast inference on Grok-3 and up
Weaknesses	Academic-only Can hallucinate citations — verify everything	Expensive Best for well-scoped tasks Not for solo hobbyists	Bot-joining model Team features gated	Writing quality trails Claude/ChatGPT Political bias debates Ecosystem is just X
Kai's verdict	S-tier for academic research. Nothing else comes close for systematic reviews.	A-tier for the right use case. Not for solo devs. If you manage engineers, try one license.	S-tier for solo + free. The best free option, hands down.	A-tier for real-time. B-tier for everything else. Worth checking when news breaks.
Link	Open →	Open →	Open →	Open →