TL;DR: Choose Fathom if you want the best free plan in the category — unlimited recordings and transcriptions at $0 — plus wide language coverage (38 languages) and unlimited AI chat on paid tiers (from $16–20/month). Choose Otter.ai if your priority is real-time, live transcription and enterprise AI-agent workflows; its free tier is capped at 300 minutes/month and paid plans start around $8.33–16.99/month but stay minute-limited. The catch for anyone doing customer research: both are meeting notetakers, not research tools. They transcribe conversations you already scheduled — they don't recruit participants, ask adaptive research questions, or theme dozens of interviews into an insight report. Koji does. It starts free, then €29/month.
Fathom vs Otter at a glance
| Fathom | Otter.ai | |
|---|---|---|
| Free plan | Unlimited recordings + transcripts (~5 AI summaries/mo) | 300 min/month, 90 min/meeting |
| Paid entry price | Premium $20/mo ($16 annual) | Pro $16.99/mo ($8.33 annual) |
| Higher tiers | Team $19, Business $34/user/mo | Business $30/user/mo, Enterprise custom |
| Languages | 38 | 6 |
| Live transcription | Post-call focused | Real-time captioning (core strength) |
| AI chat | Unlimited Ask Fathom (paid) | Capped: 20 / 50 / 200 queries by tier |
| Best for | Individuals & SMB teams, generous free tier | Live captions, enterprise AI agents |
| Runs research interviews? | No | No |
Fathom vs Otter: the head-to-head
Free plan — Fathom wins. Fathom's free tier gives you unlimited recordings and transcriptions (advanced AI summaries cap around five calls/month, then a basic template). Otter's free Basic tier limits you to 300 transcription minutes per month and 90 minutes per meeting. For anyone who records a lot of calls, Fathom's free plan is unusually generous.
Pricing — close, with a catch. Fathom Premium is $20/month ($16 annual) for unlimited AI summaries and unlimited Ask Fathom; Team is $19/user/month and Business $34/user/month (with Salesforce + HubSpot field sync). Otter Pro is $16.99/month ($8.33/user annual) but still capped at 1,200 minutes/month; Business is $30/user/month (~6,000 minutes). Otter can look cheaper per seat, but you're buying minutes, not unlimited capture.
Languages — Fathom wins big. Fathom supports 38 languages for transcription; Otter supports 6 (English, Spanish, French, German, Japanese, Chinese). If your calls span many languages, Fathom is the clear pick.
Live transcription — Otter wins. Real-time captioning is Otter's origin and core strength; OtterPilot delivers live transcripts and in-meeting Otter AI Chat. Fathom is optimized for polished post-call summaries. If you need captions as people speak, Otter leads.
AI chat — Fathom wins on volume. Ask Fathom is unlimited on paid tiers; Otter hard-caps AI Chat queries at 20 (free), 50 (Pro), and 200 (Business) per user per month.
Both sit in a fast-growing market: roughly 75% of professionals now use an AI notetaker in work meetings — about double 2023 (Laxis), and 67% of Fortune 500 companies have deployed AI note-takers somewhere (MeetingStack). The AI note-taking market is projected to grow from $623.5M in 2025 to roughly $740M in 2026, and ~$3.48B by 2035 (Precedence Research).
Why neither is a customer research tool
Here's what neither Fathom nor Otter can do, no matter which you pick: conduct research. A notetaker is a passive recorder. It transcribes a meeting you already scheduled and attended. For customer research, that leaves the hardest 90% undone. Neither tool can:
- Recruit or screen research participants
- Ask your research questions with adaptive, probing follow-ups
- Moderate interviews at scale on each participant's own time (not just meetings you attend live)
- Run many interviews in parallel instead of one meeting at a time
- Theme dozens of interviews into a single insight report with quotes and sentiment
They capture what was said in one conversation. They don't design the study, run it, or synthesize across it. And privacy is a real constraint on leaning harder on them: 73% of businesses cite privacy as the primary barrier to notetaker adoption (Fellow).
Koji: the research layer notetakers can't be
Koji is an AI-native customer research platform. Instead of transcribing meetings after the fact, it conducts the research:
- AI-moderated voice or text interviews that ask your questions and probe adaptively — see AI-moderated interviews and how AI transcription feeds analysis rather than sitting in a notes doc.
- Interviews at scale on each participant's own schedule — dozens in parallel, not one meeting at a time.
- Six structured question types —
open_ended,scale,single_choice,multiple_choice,ranking,yes_no— so you get the "why" and countable data in one study. - Automatic thematic analysis and a one-click research report with quotes and sentiment — no manual coding, no moderator bias.
It starts free (10 credits), then €29/month (Insights) or €79/month (Interviews), with voice interviews at 3 credits and a quality gate so only conversations scoring 3+ consume credits.
Which should you choose?
- Fathom — best free notetaker, most languages, unlimited AI chat; ideal for individuals and SMB teams capturing lots of internal and sales calls.
- Otter.ai — best for live/real-time captioning and enterprise AI-agent workflows, if you can live with minute caps.
- Koji — when your goal isn't note-taking but research: talking to customers at scale and getting a themed insight report in hours, not weeks.
The bottom line
Fathom and Otter are both excellent at their real job — capturing meetings you're already in. Neither is built to run customer research. If you need to recruit, interview, and synthesize at scale, start free with Koji and get your first themed report in an afternoon.
