Sigma Blog

Practical guides on money, AI tools, home costs, careers and everyday how-tos — explained simply for US readers.

Sigma Blog

Practical guides on money, AI tools, home costs, careers and everyday how-tos — explained simply for US readers.

AI & Technology

Best AI Transcription Tools in 2026 for Meetings and Interviews

Short answer: meetings belong on Fathom or Otter, and you should not pay a cent for them; an interview file that has to be right belongs with Rev’s humans, at $1.99 a minute. In March 2026, an independent roundup fed the same three-speaker meeting to six engines: the AI tools came back between 9.0% and 12.8% word error rate, a human at 3.1%. Sonix was the sharpest machine — 4.2% on clean audio, 9.0% on the meeting — and even it was beaten by a person, at 1.2% and 3.1%. On speed: Otter captions live, Rev’s AI returns a ten-minute file in five minutes or less for $2.50, and Notta clears an hour of audio in about five minutes.

A ten-minute meeting is roughly 1,500 spoken words. Sonix gets about 135 of them wrong; Notta gets about 192 wrong. The subscription is the cheap part; the half hour afterwards fixing names, numbers and who said what is the expensive part.

The Bot in the Room

Before accuracy, before price: somebody is about to be recorded, possibly without knowing it. Every meeting tool here puts something visible into your call: Fireflies turns up as a participant called the Fireflies Notetaker, and Otter’s assistant appears too, its auto-join switched on by default. The most repeated complaint about Otter is the bot walking into a client meeting its owner forgot it was watching.

In a one-party-consent state, your own consent may be enough; in an all-party-consent state it is not, and an unannounced bot is a legal problem. Switch auto-join off before your first client call, and say at the start that the meeting is being recorded.

Nor is the exposure theoretical. A class action against Otter alleges it recorded participants without consent and fed the recordings into model training; Fireflies faces a pending Illinois class action, filed in December 2025, over biometric voiceprint data. Neither case has been decided, but if you work anywhere regulated, take both to your lawyer first.

One exception: Fathom never joins your meeting. It captures the call locally, from your own computer, so nobody else sees a participant appear. You still need consent — the awkwardness goes away, the obligation does not.

The Free Tier Is Where the Traps Live

Six of the seven tools here have a free plan — Sonix offers a trial only — and “free” means six different things, three of which barely work.

Start with the worst of it. Notta advertises 120 free minutes a month, which sounds usable until you find the three-minute cap per conversation. A thirty-minute call gets transcribed to minute three and stops. Spend all 120 minutes and you will have done it in forty separate three-minute recordings. Pro is $8.17 a month on annual billing ($13.49 month to month) and buys 1,800 minutes a month, recordings up to five hours.

Fireflies plays the same trick with a different meter. Transcription is unlimited on the free plan — true, and beside the point: the plan stores 400 minutes for the whole team, a running total rather than a monthly allowance, with no downloads and no video capture. Pro is $18 a month, or $10 on annual billing, with 8,000 minutes of storage per seat. And if your account was created from September 2026, you get only a few transcription credits unless calendar auto-join is switched on.

Descript’s meter is the upload: 60 media minutes a month and 100 AI credits that never refill on the free plan, with video exports watermarked at 720p. “Media” is doing a lot of work there — minutes burn when you upload or record, whether or not you transcribe the file. Hobbyist is $24 a month, or $16 on annual billing, for ten media hours.

Otter’s free plan sounds generous — 300 minutes a month — until the second number arrives: each conversation stops at 30 minutes, so an hour-long meeting is cut off halfway, and file imports are capped at three for the life of the account. Pro is $16.99 a month, or $8.33 on annual billing, for 1,200 minutes a month and a 90-minute cap per conversation.

Rev’s free plan is the smallest of the lot — 45 AI minutes a month per seat — but the same account can send any file to a human at $1.99 a minute.

Then there is Fathom, which makes the rest look stingy: unlimited recordings, transcription and storage, in 38 languages, no minute cap at all. The meter sits on the AI layer instead — advanced summaries cover only your first five calls a month, and AI action items need Premium at $16 a month on annual billing.

Meeting Tool or File Tool? Get This Wrong and Nothing Else Matters

Meeting tools live on your calendar: Otter, Fireflies, Fathom and Notta join your calls, sort out who said what, and email you a summary when everyone hangs up. They charge per seat. File tools live on your uploads: Rev, Sonix and Descript take a recording you hand them and return text, charging per minute or per hour.

Buy a meeting tool for interview files and you pay for seats you do not need, then hit per-recording caps — Otter’s three lifetime file imports. Buy a file tool for your meetings and you manually record every call, upload it, and wait; Descript will not join your Zoom call at all, and Sonix has no meeting bot either.

So before “which is best”, ask where your audio comes from. Calendar: Fathom, Otter and Fireflies. A folder of recordings: Sonix, Rev and Notta. A podcast to edit: Descript — nothing else on this list edits audio by editing text.

Journalist interviewing a woman in a cafe with a small digital voice recorder on the table between them

The Same Ten Minutes, Six Engines

The numbers here come from a test nobody on the list paid for: an independent roundup published in 2026 ran identical files — clean studio audio, a three-speaker meeting, a phone call, accented English — through the mainstream engines and counted word error rate, the share of words each one got wrong. The meeting file is the one that matters.

Rev’s human service won outright: 1.2% word error rate on clean audio, 3.1% on the meeting file, 4.8% on the phone call — the only option here with an accuracy guarantee, 99% or better within twelve hours. Behind it, the machines bunch together. Sonix led the AI pack at 4.2% on clean audio and 9.0% on the meeting file, strongest on accented English too, at 8.0%. Descript sat just behind at 4.5% and 9.4%; Rev’s own AI came in at 5.1% and 10.8%, Otter at 5.8% and 11.5%. Notta brought up the rear at 6.5% and 12.8% — and fell hardest on phone audio, at 16.2%, roughly one word in six wrong.

Every tool lost about half its accuracy moving from studio to phone call. Otter’s weak spot was overlapping speech: when two people talked at once, the words collapsed into a single speaker. Notta’s was everything at once — names, jargon, crosstalk — and you pay for it in correction time. Sonix was never the worst on any of the four files.

The vendors’ own numbers are best-case figures. Notta advertises up to 98.86% accuracy, yet its own help centre puts casual meetings at 50% to 80%. Rev describes its AI as 96% or better; the independent test measured about 95% of words right on clean audio and 89% on the meeting file. Sonix markets 99% accuracy, but that only holds on clean audio — on the phone file it measured 11.8% word error rate. All accuracy figures are as reported by the cited sources, not the author’s own tests.

Person on a video conference call with live captions running along the bottom of the laptop screen

What Ten Minutes Actually Costs

The honest comparison is what one recording costs you, not the monthly price. Start at the top: a human at Rev charges $1.99 a minute — ten minutes is $19.90, and a ninety-minute research interview costs more than a year of Notta Pro. Human transcription is a per-project budget line, not a subscription you forget about.

Drop to the AI per-minute tools: Rev’s AI is $0.25 a minute, so ten minutes is $2.50; Sonix pay-as-you-go is $10 an hour, so ten minutes is $1.67. Then the subscriptions, where ten minutes is almost a rounding error — about four and a half cents of a $8.17 Notta Pro month, about seven cents of Otter Pro. Fathom and Fireflies free cost nothing, until you hit the meter that applies.

Then the option that makes all of it look expensive: OpenAI’s Whisper API at roughly $0.003 to $0.006 a minute — ten minutes for three to six cents, fifty hours a month for $9 to $18. The catch is that there is no product attached: no speaker identification, no editor, no summaries, no calendar. You are buying a transcript string and building everything else yourself.

What Ten Minutes Costs, Tool by Tool

ToolTen minutes costs youThe free plan’s real limitPick it when
FathomNothingAdvanced summaries: first 5 calls a monthUnlimited free meetings, solo
Otter.aiAbout 7 cents of a Pro month30 min per conversation; 3 lifetime importsLive captions, quick solo notes
Fireflies.aiNothing on free400 min team storage; no downloadsSales teams and CRM workflows
DescriptPart of the $16/mo Hobbyist plan60 media minutes a month; minutes burn on uploadYou edit podcasts and video by text
Rev AI$2.5045 AI min a month per seatInterviews that may need a human
Sonix$1.67 pay-as-you-goTrial only, no free planArchives and multi-language files (54+ languages)
NottaAbout 4.5 cents of a Pro month3 min per conversationHigh-volume solo use on a budget

Word error rates from the independent March 2026 benchmark; lower is better. Fireflies and Fathom accuracy not published; not in the March 2026 test. Rev human transcription measured 3.1% on the same meeting file, 99%+ accuracy guaranteed. Prices checked October 2026; verify at checkout.

Run Your Own Ten-Minute Test

Test it yourself, on your own audio, this afternoon. Every tool on this list has a free tier or a trial. Take the same ten-minute stretch, the messier the better, and run it through two or three of them. Judge four things only: do the names and numbers survive, does crosstalk collapse into one speaker, how long do your corrections take, and can you export the transcript at all? That last one matters — Fireflies allows no transcript downloads on its free plan, so a perfect transcript you cannot take with you is not a perfect transcript.

Time the whole job, corrections included: a tool that finishes in thirty seconds and takes you twenty minutes to fix is slower than one that takes five minutes and needs two.

Studio microphone beside a monitor showing an audio editing timeline with a waveform and transcript text

Key Takeaways

Decision one is legal, not technical. Before you install anything, decide how you will get consent to record: Otter’s auto-join is on by default, and both Otter and Fireflies face class actions over recording and voiceprint data. Fathom’s bot-free capture removes the awkwardness, not the obligation.

Decision two is where your audio comes from: calendar audio wants a meeting tool, a folder of files wants a per-minute tool, a podcast wants Descript. Get this wrong and no accuracy ranking will save you — you will pay for seats you do not need, or upload calls by hand.

Decision three is which meter you can live with. The engines have converged — on clean audio the best and worst AI tools in the March 2026 test sat less than two and a half percentage points apart — and the meters have not: Otter counts minutes, Fireflies counts storage, Fathom counts summaries, Descript counts uploads whether you transcribe them or not, and Notta’s free plan stops every conversation at three minutes. On bad audio the gap opens up, so buy a better microphone before you buy a better plan. And when a recording has to be right, the only thing that beat the best machine was a human, at 3.1% against 9.0%.

Frequently Asked Questions

Which AI transcription tool is the most accurate?

Of the AI-only tools, Sonix: 4.2% word error rate on clean audio and 9.0% on a three-speaker meeting file in the independent March 2026 benchmark, with Descript a step behind at 4.5% and 9.4%. But the most accurate option was a person — Rev’s human service at 1.2% and 3.1%, the only one with a 99% or better accuracy guarantee. No AI tool beat a human.

Is there a genuinely free AI transcription tool?

Yes — Fathom, and by a distance. Its free plan includes unlimited recordings, transcription and storage, no minute cap, across 38 languages. The catch is upstairs: advanced summaries cover only your first five calls a month; AI action items need the $16-a-month Premium plan. Otter’s 300 free minutes come with a 30-minute cap per conversation; Fireflies’ unlimited transcription comes with just 400 minutes of team storage.

How long does it take to transcribe a ten-minute recording?

Otter is fastest in practice, because it captions live — the transcript is done when the meeting is. Rev’s AI hands a file back in five minutes or less. Notta processes about an hour of audio in five minutes, so a ten-minute clip takes under a minute. Fireflies and Fathom deliver after the call ends. Rev’s human service takes up to twelve hours — the trade for the 3.1% error rate.

Do these tools work on phone calls, or only on Zoom and Teams?

They work on phone audio, but badly: every tool in the March 2026 test lost about half its accuracy moving from studio to a phone call. Notta was worst, at 16.2% word error rate on the phone file — roughly one word in six wrong; Sonix measured 11.8% on the same file, and Rev’s human service held up best at 4.8%. If your interviews happen on the phone, test that exact audio first, and budget for a human on the recordings that matter.

Is it legal to record a meeting with an AI notetaker?

It depends on where the participants are. In one-party-consent states, one participant’s consent is enough; in all-party-consent states, everyone must agree. An AI bot joining a call counts as recording, and Otter’s auto-join is switched on by default — which is how bots end up in client meetings uninvited, and part of why Otter faces a class action alleging recording without consent. Say the meeting is being recorded, and switch auto-join off for client calls. General information, not legal advice.

Do I need to pay, or is a free plan enough?

Start free, and pay when a specific wall stops you. Fathom’s free tier covers unlimited meetings outright; Otter’s 300 minutes cover about five hours a month. Open your wallet when you hit a limit that bites: Otter cutting conversations off at 30 minutes, Notta’s three-minute cap, Fireflies running out of its 400 minutes of team storage, or Fathom’s five advanced summaries a month. Until then, a paid plan is buying headroom you are not using.

Sources

  • Your AI Tool Stack, “Best AI Transcription Tools 2026: 7 Tested, Priced, and Ranked” — independent March 2026 word-error-rate benchmark on identical files (clean studio, three-speaker meeting, phone call, accented English) and per-tool pricing; accessed 7 November 2026.
  • Otter.ai pricing page and Basic plan limits, via TranscribeX, “Is Otter.ai Free? Free Plan Limits Explained (2026)”, updated 29 October 2026; NoterAI, “Otter.ai Pricing in 2026”, updated 11 October 2026 — Basic 300 minutes a month, 30 minutes per conversation, 3 lifetime file imports; Pro $16.99 a month or $8.33 billed annually; Business $30 or $19.99 annually; 20% student discount.
  • Rev pricing and service pages, via AnyGen, “Rev Transcribe: Price, Speed & How It Works”, accessed 28 August 2026 — AI transcription $0.25 a minute, 96%+ accuracy claim, delivered in 5 minutes or less; human transcription from $1.99 a minute, 99%+ guaranteed, 12 hours or less; Free plan 45 AI minutes a seat a month; Essentials $29.99 a seat a month.
  • Descript pricing page, via Real AI Test, “Descript Review 2026”, verified 28 August 2026; Javis Review, checked 3 October 2026 — Free 60 media minutes a month, 100 one-time AI credits, 720p watermarked export; Hobbyist $24 a month or $16 billed annually; Creator $35 or $24 annually; 25 transcription languages.
  • Notta pricing page and help centre, via Javis Review, “Notta Review 2026”, checked 27 October 2026; AFFiNE, “Notta Review 2026”, checked October 2026 — Free 120 minutes a month, 3 minutes per conversation; Pro $8.17 a month billed annually ($97.99 a year), $13.49 month to month, 1,800 minutes a month; vendor accuracy claim up to 98.86%; help centre puts casual meetings at 50% to 80%.
  • Fireflies.ai pricing page and plan guides, via Claap, “Fireflies Pricing 2026”, updated 9 October 2026; GetVoibe, checked 26 October 2026 — Free unlimited transcription, 400 minutes storage per team, 2-hour meeting cap, 20 one-time AI credits; Pro $18 a month or $10 billed annually; Business $29 or $19 annually; 200-hour monthly cap added to Pro in July 2026; Illinois BIPA class action filed December 2025.
  • Fathom pricing page and help centre, via GetVoibe, “Fathom Pricing”, checked 8 October 2026; HireKai, “Fathom AI Review (2026)” — Free unlimited recordings, transcription and storage, 38 languages, advanced summaries on the first 5 calls a month; Premium $20 a month or $16 billed annually; Team $19 or $15 annually; Superhuman acquired Fathom on 14 September 2026.
  • Sonix pricing, via Your AI Tool Stack (as above) — pay-as-you-go $10 an hour; Core $25 a month; 54+ languages; “99% accuracy” marketing claim applies to clean audio only.
  • OpenAI Whisper API pricing, via Your AI Tool Stack (as above) — gpt-4o-mini-transcribe about $0.003 a minute, whisper-1 and gpt-4o-transcribe $0.006 a minute; no speaker diarisation, editor or summaries included.
  • Rankite, “Best AI Transcription Software: 8 Tools Compared”, checked October 2026 — independent accuracy range of 85% to 92% on real-world recordings; human transcription 99% at $1.99 to $2.69 a minute.

Educational information only. Prices, free-plan limits and accuracy claims change frequently — confirm the current figures on each vendor’s own pricing page before buying. Accuracy figures are from the independent benchmark cited above, not from our own testing; your results will vary with your audio. Not legal advice.

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