AI Transcription, Scored: One Audio Hour, 15 Cents to $119

The best AI transcription tool depends on what you’re feeding it: Sonix for interview files you’ll quote, TurboScribe for unlimited volume at $10 a month, Rev when the transcript has to survive scrutiny, Descript when the transcript is the edit, MacWhisper when the audio can’t leave your machine, AssemblyAI at $0.15 an audio hour. Otter.ai wins live meetings and loses files: three file imports for the lifetime of a free account (verified Aug 6, 2026).

Updated August 2026. Every price below was read off the vendor’s own pricing page. Seven of the eight were re-read on August 6, 2026, a third pass in eight days, and not a single figure had moved. Notta is the exception, and the reason is on Notta: its pricing page serves currency by visitor region and served us euros, so its dollar figures still carry a July 30 stamp. You’ll see that said again where those numbers appear.

The eight at a glance

Scores are judgment on documented evidence, not a lab benchmark. The rows sit in score order; that is not a ranking of who should get your money. The “Best for” column is.

What an hour of audio actually costs

Nobody publishes this table because it makes the pricing look arbitrary. Every figure is the vendor’s own published rate divided by the hours it buys (rates verified Aug 6, 2026; Notta’s USD Jul 30, 2026).

Roughly 800-fold separates the top of that column from the bottom, and the machines are not the expensive part. Straight machine output runs 15 to 31 cents an audio hour across the first three rows. Everything above that is paying for metering, an interface, or people.

The Rev rows deserve a stare. One AI transcript bought without a subscription costs $0.25 a minute. On an Essentials subscription the same model runs about half a cent. Rev isn’t charging for transcription there. It’s charging for indecision.

How we scored this, and what we didn’t do

We did not run these tools on real interview audio. Any page that implies otherwise, without showing you the file and the error counts, is guessing with a straight face.

What we did: opened all eight vendors’ pricing pages on July 30, 2026 (nine URLs, because Rev splits subscriptions from pay-per-minute) and recorded what was on them, including the caps buried below the plan cards; normalised every rate to a cost per audio hour; compared language coverage, speaker labelling, file ceilings and compliance claims; and read an 80-comment r/artificial thread end to end.

Then we went back through all nine twice more, on August 5 and August 6, off the vendors’ own pages rather than anyone’s roundup. Seven of the eight re-confirmed in their published currency both times, and not one price had moved. Notta served a euro-denominated page on every re-read, so only its plan structure and caps could be checked again. Ratings are ours. Nobody paid to be here.

Best for interview and research files: Sonix

Sonix assumes you’ll be quoting the transcript: custom dictionary for names and jargon, speaker voiceprints, a medical vocabulary model, 54+ languages on every tier, SOC 2 Type II and HIPAA claims. It bills honestly and painfully. Pay-as-you-go is $10 an hour prorated to the second, or $5, $2.50 and $2.00 an hour on Core, Advanced and Pro, with $10/hr overage and $25/month seats that add no hours (verified Aug 6, 2026). A Redditor who tried several tools called it “the easiest, fastest the most accurate but also super expensive.” Both halves hold.

Skip it if you transcribe over 40 hours a month, or you only need clean single-speaker audio turned into text.

Best for volume: TurboScribe

One number. $10 a month billed yearly ($120/year) buys unlimited transcriptions, files up to 10 hours or 5 GB, translation into 134+ languages, and unlimited storage (verified Aug 6, 2026). Nothing else here removes the meter, and the free tier is three 30-minute transcripts a day rather than a demo. What you don’t get is a team: no seat model, no admin console, no compliance page, no month-to-month price anywhere.

Skip it if you need an audit trail, a signed DPA, or anyone else in the account.

Best when the transcript has to hold up: Rev

Rev is the only tool here where you can escalate. Run the file through AI, read it, and if the machine is clearly guessing, send that same file to human transcribers at $1.99 a minute for a claimed 99% accuracy in 12 hours or less (verified Aug 6, 2026). Essentials at $29.99/seat/month ($25.49 billed yearly) includes 5,000 AI minutes a seat in English and Spanish; Pro at $59.99 ($47.99 yearly) raises that to 10,000 verbatim minutes across 37+ languages. SOC 2 Type II, HIPAA and CJIS compliance are published, and Rev’s own pricing page is split into a legal-industry view before a general one — it knows exactly who buys the escalation.

Skip it if you’d never pay for the human tier, because that option is most of what the subscription buys.

Best for audio that can’t leave your machine: MacWhisper

MacWhisper is a native Mac app running Whisper and Nvidia’s Parakeet models locally. The listing puts the selling point in bold: “no data leaves your machine.” That is the entire reason to buy it, and no cloud tool on this page can offer it. Pro costs EUR 65 once, the free version nothing, and volume licences start at EUR 269 for five (verified Aug 6, 2026). It holds 4.5 out of 5 from 2,370 Gumroad ratings against 520,233 sales, shipped by one developer (counts read Aug 6, 2026; Gumroad’s figures move hourly).

Skip it if you’re on Windows. Skip it too on an older Intel Mac or 8 GB of RAM: the app runs, but the developer says outright that Medium and Large need more than 8 GB and that Intel performance “can be bad.” Automatic speaker recognition needs Pro and Apple silicon.

Best when the transcript is the edit: Descript

Descript isn’t a transcription tool. It’s a video editor whose timeline is a document, so deleting a sentence deletes the footage. Read the meter first: Free gives 60 media minutes a month, Hobbyist at $16/person/month annually ($24 monthly) gives 600, Creator at $24 gives 1,800, Business at $50 gives 2,400 (verified Aug 6, 2026). Minutes burn on anything you import or record, transcribed or not, and coverage is 25 languages against Sonix’s 54.

Skip it if you have a hundred hours of interviews and no video to make; at $1.60 an audio hour you’d pay editor prices for a text file. Our Descript alternatives page and Descript vs Riverside split that decision properly.

Best for developers: AssemblyAI

If you can make an HTTP request, this is the floor. Universal-2 costs $0.15 per audio hour across 99 languages; Universal-3.5 Pro is $0.21 across 18, with speaker diarization $0.02 an hour on top and a medical mode at $0.15 (verified Aug 6, 2026). The $25 that buys five hours of Sonix Core buys around 166 hours of Universal-2.

Then read the customer wall on that same pricing page: Zoom, Fireflies and Granola all sit on it (read Aug 6, 2026). A good number of the products marketed to you as “AI transcription tools” are a login screen over this API. One developer in the r/artificial thread below volunteers as much, having built a transcription app “using AssemblyAI solely for the purpose of having the highest possible transcription quality.”

Skip it if you want an interface. There’s a playground and an API: no editor, no shareable transcript page, no folders.

Best for bilingual work: Notta

Notta’s differentiator is language work. Its custom-vocabulary feature covers exactly two languages, English and Japanese, which tells you who it was built for. Pro is $8.17/month billed yearly ($97.99/year) for 1,800 minutes and recordings up to five hours; Business is $16.67/month billed yearly ($199.99/year) with unlimited minutes (verified Jul 30, 2026 — see below).

Then the add-ons. Bilingual transcription and monolingual real-time translation get four and two free uses a month on every plan, Enterprise included. After that they are separate subscriptions at roughly $9 and $6 a month on annual billing (July dollars, same caveat as below), and only Pro and above are allowed to buy them at all (allowances verified Aug 6, 2026). So the free plan can sample the one thing Notta is best at and then cannot pay for it. The headline price excludes the feature most people come for.

One caveat on Notta’s dollar figures, and this half is ours: notta.ai/en/pricing serves prices by visitor region. Two re-checks, August 5 and August 6, both rendered the entire page in euros (Pro €7/month, €83.99 a year), which re-confirms the plan structure and every cap and tells us nothing about the dollars. The USD prices above still rest on the July 30 pull from a US vantage. Every other tool here was re-confirmed in its own published currency.

Skip it if you’re judging it from the free plan, which caps each conversation at three minutes.

Best for live meetings, worst for files: Otter.ai

Otter earns its place on the live side. It joins Zoom, Teams and Meet, captions live and writes summaries. Basic is free with 300 minutes a month; Pro is $16.99/user/month ($8.33 annually) with 1,200; Business lists at $30/user/month ($19.99 annually) with unlimited meetings (verified Aug 6, 2026). Then the number that decides this page: Otter’s free plan allows three imported files for the lifetime of the account, and Pro allows ten a month. More in the Otter.ai review.

Skip it if your work arrives as files rather than calendar invites. Also skip the advertised $4.17 Pro rate: Otter’s own footnote says it’s valid only with an India-issued credit card.

What Reddit actually says, and who’s pretending

The most-cited non-vendor discussion here is one r/artificial thread: What’s the best AI for audio transcription?, posted 17 July 2025 by someone who needed court-usable transcripts and had to put names to voices. It runs to 80 comments (read Aug 6, 2026). We don’t quote its score: Reddit fuzzes vote counts, and five reads of this one thread returned four different point totals.

The useful exchange is a correction. A paramedic writes that “by far the best model is Open AI’s Whisper (large model), but it requires a beefy computer or cloud service to run it,” then adds that it handles speaker diarisation. A later reply disagrees flatly: “Whisper doesn’t do speaker diarization. It’s great when you just have one long monologue, but it can’t transcribe conversations.” The second commenter is right, which matters because raw Whisper is the free answer half the internet gives on multi-speaker audio.

Read the rest with your guard up. One app is recommended twice by two accounts in near-identical language, both linking the same App Store listing with the same provider tracking token and different campaign tags. Further down a second app collects the same treatment: two accounts, both comments timestamped seven months ago, the same brochure cadence about depositions and export formats. And when a commenter quotes a vendor’s terms back at it — “you grant videototextai.com a non-exclusive, worldwide, perpetual, royalty-free license to use, copy, modify, and display your User Content” — the vendor’s own account answers that this is “Just an industry standard terms :)”. It is not. Read who owns your interview before you upload it.

Where AI transcription still fails

Accuracy claims here describe clean audio and one cooperative speaker. Speaker attribution is the first weak point. Diarization is a separate, weaker model than transcription, which is why AssemblyAI bills it as a $0.02/hr add-on and MacWhisper gates it behind Pro and Apple silicon. Two similar voices, or one interruption, and the labels swap.

Invention is the other. NYU’s library guide puts it plainly: these tools “not only incorrectly transcribe, but can also append text that was not part of the source audio.” A garbled word becomes a confident, grammatical, wrong sentence and nothing flags it.

Note taker or transcriber? Not the same purchase

A note taker is priced per seat per month around a calendar; a transcriber is priced per audio hour and assumes you already have the file. Otter’s three lifetime imports and Notta’s three-minute free ceiling are aimed at live calls. If your audio arrives as a calendar invite, start at our AI note takers hub.

Two more we checked and didn’t rank

Trint and HappyScribe are the names you’ll meet next. Neither earned a row, for different reasons.

Trint sells “unlimited” transcription in 50+ languages with the broadcast integrations newsrooms genuinely need, at €69 per seat per month, euros only. Two problems. That unlimited carries a fair-use cap its own FAQ uses to exclude archival projects, bulk volume and continuous live transcription — the three things a newsroom buys unlimited for. And trint.com/pricing returns a 404, with the live plans sitting at app.trint.com/plans instead (both verified Aug 6, 2026). HappyScribe is cheaper on paper, 150+ languages from $17 a month (verified Aug 5, 2026), until you read what free means: a ten-minute trial, total, not per file. Same trap as Otter’s three lifetime imports, friendlier copy.

Trint’s figures now carry two readings a day apart. HappyScribe’s rest on one, which is why it stays out of the table. Trint’s exclusion is a judgment instead: you cannot sell unlimited to newsrooms and then write the archive out of the terms.

FAQ

What is AI transcription?

AI transcription converts recorded audio or video into text using speech-recognition models, then applies a language model to fix punctuation and casing. Better tools add diarization, which labels who spoke when. It differs from a meeting note taker by working on files you already have rather than joining live calls.

What is the most accurate AI transcription tool?

On documented evidence, Sonix and Rev make the strongest accuracy cases, and Rev is the only one that lets you escalate a bad file to human transcribers at $1.99 a minute for a claimed 99% (verified Aug 6, 2026). Both figures are vendor claims. We have not measured word error rates ourselves.

How much does AI transcription cost per hour of audio?

Between $0.15 and $119.40, using published rates. AssemblyAI’s Universal-2 API is $0.15 an audio hour, Notta Pro works out near $0.27, Sonix pay-as-you-go is $10, and Rev’s human desk is $1.99 a minute. TurboScribe removes the meter entirely at $10 a month billed yearly.

Is there a genuinely free AI transcription tool?

Yes, two. MacWhisper Free runs Whisper on your own Mac with no upload and no cap. TurboScribe’s free plan gives three 30-minute transcripts a day. Otter’s 300 free minutes and Notta’s 120 are real but nearly unusable for files, given a three-import lifetime limit and a three-minute ceiling.

Does AI transcription work for interviews with multiple speakers?

Only with speaker diarization, which is a separate feature from transcription and often costs extra. Raw OpenAI Whisper does not do it, a point corrected mid-thread on r/artificial. Sonix, Rev, Notta and Otter include speaker labels; AssemblyAI charges $0.02 an audio hour; MacWhisper needs Pro and Apple silicon.

Can AI transcription be used for legal or medical work?

Not unchecked. Sonix and Rev publish HIPAA compliance, Rev adds CJIS, and Sonix ships a medical vocabulary model, so the paperwork exists. The output still hallucinates plausible sentences, so every quote you rely on has to be verified against the audio by a person.

Changelog

• 2026-08-06 — QA and editing pass on top of the same day’s verification pass. Four sources re-pulled independently of the writer: assemblyai.com/pricing, rev.com/services, the MacWhisper Gumroad listing and notta.ai/en/pricing. Nothing had moved. Rev still renders human transcription at $1.99/minute above AI at $0.25/minute, so the “15 cents to $119” headline now rests on a price confirmed three times in eight days; AssemblyAI holds at $0.15 and $0.21 an audio hour with $0.02 diarization. With the writer’s six, all nine URLs carry an August 6 reading and seven of the eight tools move to an August 6 stamp. Notta rendered in euros a third time even with the browser locale forced to en-US, which settles that the currency follows the IP and not the headers: its dollar figures keep their July 30 stamp and the add-on dollar figures are now labelled as July dollars on the page too. One correction reversed: Fireflies and Granola are back on the page beside Zoom. The August 5 cut was right on the evidence then available, but a full render of the same pricing page shows a customer logo marquee below the fold carrying all three, and the note now records exactly which element the claim rests on. Added from the source thread, verified verbatim: a developer who built a transcription app on AssemblyAI saying so in the thread, and a second cluster of two accounts recommending the same tool in near-identical language seven months ago. MacWhisper’s Gumroad counts refreshed to 520,233 sales and 2,370 ratings, and the listing turns out to be geo-priced as well. Trint’s copy corrected: it now has two readings, HappyScribe still has one, and the page says which is a data gap and which is a judgment.
• 2026-08-06 — Third verification pass, no rewrite, no price changed. Six ranked tools re-pulled independently on their own pricing pages and every figure held for the third consecutive reading: Sonix ($10/audio hour pay-as-you-go, Core $25/Advanced $50/Pro $80, added seats at $25 that carry no hours), TurboScribe (free 3-a-day at 30-minute uploads, Unlimited $10/month billed yearly), Rev (free 45 AI minutes English-only, Essentials $29.99 and Pro $59.99 per seat/month), Descript (free 60 media minutes, $16/$24/$50 per person/month annual, and the FAQ still defining media hours as consumed on upload whether or not you transcribe) and Otter (Basic free at 300 minutes but three lifetime file imports, Pro $16.99, Business $30 list). MacWhisper’s Gumroad listing re-read: €65 one-time Pro unchanged, counts moved again to 520,217 sales and 4.5/5 across 2,370 ratings (from 519,970 and 2,368 on Aug 5). Trint re-pulled and now carries a second reading — see notes. AssemblyAI and Notta were not re-pulled this pass; Notta’s USD figures still rest on the Jul 30 US-vantage read and remain the page’s oldest open item. SERP re-pulled for “ai transcription”: unchanged in substance from Aug 5 — the AI Overview fires with nine references (Reddit, the Wonder Tools Substack, Otter, TurboScribe, Riverside, Audacity, audiotranscriber.io and two YouTube videos) and the organic top nine runs Evernote, Riverside, Wonder Tools, Otter, Reddit, Notta, the Ada Lovelace Institute, NYU Libraries and Trint. Still not one ranked independent comparison on the page, which is the reason this hub exists. r/artificial source thread read a fourth time: 80 comments again, score read 28 at 96% (25/91%, 27/96% and 25/93% on the three prior reads — the fuzzing is now well documented and no point count is used on-page); all quotes used on-page re-checked verbatim.
• 2026-08-05 — QA and editing pass; four vendor sources re-pulled independently of the writer. Rev: rev.com/services re-confirmed Human Transcription at $1.99/minute above AI Transcription at $0.25/minute, so the $119.40 end of the “15 cents to $119” headline moves from a Jul 30 stamp to Aug 5. AssemblyAI: unchanged at $0.15 and $0.21 an audio hour with $0.02 diarization, upgraded to an Aug 5 stamp. MacWhisper: Gumroad listing re-read, tiers unchanged at €0/€65/€269/€490/€899/€2,199. Notta: the page served euros rather than dollars, so its plan structure and caps re-confirmed but its USD prices did not — that gap is now stated on the page rather than buried in the notes, and Notta is the only tool still carrying a July 30 stamp. Corrections: a claim that Granola and Fireflies sit on AssemblyAI’s customer wall was cut to Zoom, the only one we could see; a claim that Rev’s 5,000 Essentials minutes pool across the account was cut, because the pricing page says minutes/seat/month and nothing about pooling; Reddit vote counts were pulled entirely after three reads returned three different scores, leaving only the comment count. Trint’s fair-use exclusions moved onto the page. The cost-per-hour table got its own verification stamp, and the at-a-glance table now says outright that score order is not a buying order.
• 2026-08-05 — Verification pass, no rewrite. Six of the eight tools re-checked on the vendors’ own pricing pages and every price held with no change: Sonix ($10/audio hour, Core $25/Advanced $50/Pro $80, $25 seats that add no hours), TurboScribe ($10/mo billed yearly, free 3-a-day), Rev (free 45 min, $29.99 and $59.99 per seat, $0.25/min), Descript ($16/$24/$50 per person/mo annual, 10/30/40 media hours), Otter (free 300 min but 3 lifetime imports, $16.99 Pro, $30 Business list) and MacWhisper (€65 one-time Pro, volume tiers to €2,199). AssemblyAI and Notta were not re-pulled and keep their Jul 30 stamps. MacWhisper’s Gumroad counts updated, 2,329 → 2,368 ratings at 4.5/5 against 519,970 sales. Trint and HappyScribe added as a checked-but-unranked section with prices read live. SERP re-pulled for “ai transcription”: the AI Overview now fires with nine references — Reddit, the Wonder Tools Substack, Otter, TurboScribe, Riverside, Audacity, audiotranscriber.io and two YouTube videos — and the organic top eight runs Evernote, Riverside, Wonder Tools, the Ada Lovelace Institute, Otter, NYU Libraries, Reddit and Trint. Still no ranked independent comparison anywhere on the page. r/artificial source thread re-read: 80 comments, 27 points at 96% upvoted (up from 25 at 91% on Jul 30 — Reddit fuzzes scores; no point count is used on-page).
• 2026-07-30 — Page created. Every price read live on the vendor’s own page (nine URLs, eight vendors), then normalised to a cost per audio hour no vendor publishes. SERP snapshot taken for “ai transcription”: no ranked independent comparison appears in the AI Overview’s seven references or the organic top eight. r/artificial source thread read and quotes verified. Primary keyword set from scratch: 5,400/mo, SD 43, $7.09 CPC.

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Independent, no paid placements. Every price verified on the vendor’s own site and date-stamped; every tool carries an honest anti-pick. See how we score AI tools and our independence charter. More categories on the AI tools index, every verified price on the pricing index.