AI Transcription Services Compared (2026): A Practical Guide for Individuals and Teams
AI Transcription Services Compared: A Practical Guide (2026)
Services that turn recordings into text with AI have multiplied over the past two years: Notta, toruno, Rimo Voice, Otolio (スマート書記), AI GIJIROKU, YOMEL, and more. They all "do transcription," and since major engines have all reached practical accuracy, you can no longer choose by speech recognition engine alone.
So how do you choose? This article compares the main services on five axes — free tier, effective pricing, diarization, editing, and export — and maps them to four tasks: meeting minutes, interviews, lectures/study, and video/podcast subtitles.
Disclosure first: I develop and sell PUBVOICE, an AI audio SaaS. This comparison is based on public information, and the axes (including ones where competitors win, like free-tier volume) were chosen to be fair. Prices change — always confirm on each vendor's official page.
The Five Selection Axes
As detailed in the market analysis, the differences that matter now are:
- Free-tier substance — "3 hours total, once" and "60 minutes refreshed monthly" are completely different things
- Effective per-hour cost — your monthly minutes divided into the price, not the sticker price
- Diarization — whether multi-speaker audio splits into Speaker A/B, and how well
- Editing experience — speaker renaming, search, fixing misrecognitions
- Export and reuse — TXT (speaker-labeled)/SRT/VTT, copy-paste friendliness
Comparison Table (public info, 2026)
| Service | Free tier (rough) | Paid (rough) | Diarization | Key exports | Best at |
|---|---|---|---|---|---|
| Notta | Yes (monthly limit) | From ~few $/mo | Yes | TXT/DOCX | Meetings & interviews, multilingual |
| toruno | 3 hours total (personal) | Metered & monthly | Yes | TXT | Meeting recordings, minutes |
| Rimo Voice | Trial | Monthly | Yes | TXT | Interviews, Japanese-focused |
| Otolio (スマート書記) | Trial | Enterprise seats | Yes | Minutes format | Auto-recording online meetings |
| AI GIJIROKU | Trial | Enterprise | Yes | Minutes format | Online meetings, summaries |
| YOMEL | Yes | Metered/monthly | Yes | TXT | Lectures, interview uploads |
| PUBVOICE (ours) | 90s no-signup + 60 min/mo | Monthly (minutes & chars) | Yes | TXT/SRT/VTT | File uploads, subtitles, TTS combo |
Otolio ranked #1 in share in a 1,690-respondent survey (BOXIL); internationally, Otter.ai (free tier with minute caps) and Fireflies.ai (per-seat flat) are the defaults. All figures are indicative and subject to plan changes.
By Task: What to Pick
Meeting minutes. If your org standardizes on online meetings, auto-join tools (Otolio, AI GIJIROKU, Notta) are the least friction. If you record in the room (board meetings, field huddles), file-bring-in services fit better.
Interviews. Fidelity to "who said what, when" is everything: diarization accuracy and bulk speaker renaming drive editing time. Rimo Voice, PUBVOICE, and Notta are candidates; if the transcript feeds video, check SRT/VTT export.
Lectures & study. Long uploads and a monthly-refreshing free tier matter most. PUBVOICE (60 min/mo free) and Notta's free tier are realistic starting points; compute metered vs. monthly against your usage.
Podcast/YouTube subtitles. Verify SRT/VTT export before anything else — TXT-only services mean rebuilding subtitle files in another tool. PUBVOICE exports SRT/VTT natively.
Annual Cost Intuition
For someone transcribing 5 hours/month (recheck with current prices):
- Metered (~¥500/hr): ¥2,500/mo → ¥30,000/yr
- Monthly plan (¥2,000, within cap): ¥24,000/yr
- Free tier + metered (60 min free): ~¥2,000/mo → ¥24,000/yr
Know your monthly minutes before reading pricing pages. "Unlimited" plans almost always carry practical caps (files, hours, requests), and fit depends on your volume versus those caps.
Pre-Purchase Checklist
- Can you try before registering? (PUBVOICE: 90 seconds, no signup)
- Did you test your audio (multi-speaker, jargon) for diarization and errors?
- Do exports connect to your next step (minutes/subtitles/drafts)?
- Data location, retention, and training use confirmed? (mandatory for businesses)
- Billing cadence (monthly vs. annual) checked?
FAQ
Q. How far does the free tier go?
A. PUBVOICE: 90 seconds without signup, then 60 transcription minutes + 10,000 TTS characters monthly after registering. Other services offer trials — check whether they're cumulative or monthly.
Q. How accurate is diarization?
A. It depends heavily on recording conditions; see the recording guide — getting mics close to speakers is the single biggest win.
Q. Are technical terms hard for every service?
A. Generally yes. Plan on human post-editing; what differs is how good the editor is. PUBVOICE's editor supports speaker renaming and bulk edits.
Q. Can I use it for video subtitles?
A. Yes — PUBVOICE exports SRT/VTT that load directly into players and editors.
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Yutaro Sasao
CEO / MediaLeap Inc.
After leading web media monetization and data analytics at KADOKAWA / DWANGO, and driving programmatic ad revenue growth in SSP / ad network businesses, he founded MediaLeap Inc. in May 2025. He now develops and operates AI audio SaaS "PUBVOICE", tourism DX app "ANIME TRAVEL", and AI voice chat app "AITOMO". Drawing on cross-functional expertise in advertising, technology, analytics, and business, he works to improve media revenue through data-driven strategies.
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