Compare AI tools

	Cartesia S	Claude Code S	Elicit S	Fathom S
Tagline	Ultra-low-latency voice. Built for realtime agents.	Anthropic's CLI agent. Opus-powered, operates on your repo directly.	AI research assistant for academic literature.	Meeting notes, free forever for individuals.
Category	Voice	Coding	Research	Meetings
Pricing	Free tier + usage-based API	Part of Claude Pro/Max/Team plans	Free + $12-$42/mo	Free for individuals + $15-$29/user/mo teams
Best for	Developers building voice agents, phone bots, interactive apps.	Developers who want an agent, not autocomplete. Large refactors, tests, docs.	Grad students, researchers, anyone doing literature reviews.	Solo operators, freelancers, small teams on a budget.
Strengths	< 90ms latency — the fastest in the market Sonic model sounds natural Developer-friendly API	Runs locally, edits your actual files Strong on large codebases with 1M context Great at multi-step tasks	Searches 125M+ papers Extracts + synthesizes findings across papers Systematic review workflow	Unlimited free tier for solo use Strong summaries + action items Works in Zoom, Meet, Teams
Weaknesses	Fewer voices than ElevenLabs Less consumer-facing brand	Terminal-based — learning curve Can't be used without Claude subscription	Academic-only Can hallucinate citations — verify everything	Bot-joining model Team features gated
Kai's verdict	S-tier for realtime. If latency matters more than voice catalog, start here.	S-tier if you live in the terminal. Different shape than Cursor — complementary, not replacement.	S-tier for academic research. Nothing else comes close for systematic reviews.	S-tier for solo + free. The best free option, hands down.
Link	Open →	Open →	Open →	Open →