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Translation · head to head

MateCat vs Sonix

MateCat logo

MateCat

Translation

Free, browser-based CAT tool under the LGPL, developed and hosted by the translation company Translated

From
Free
Rated
-
Full reviewWebsite
Sonix logo

Sonix

Translation

Automated transcription and translation with per-hour pricing published up front

From
$10/month
Rated
-
Full reviewWebsite

The short version

  • Only MateCat has a free tier, so it costs nothing to try first.
  • Each has a real cost: MateCat the hosted version most users rely on depends on Translated srl’s continued operation and infrastructure decisions, unlike a self-run desktop tool.; Sonix monthly hour allowances are small relative to the subscription price: the $25 Core plan includes five hours, which at the published $10 overage rate means the subscription is only worth buying for storage and features rather than for the hours.
  • They diverge on capability: MateCat covers Browser-based CAT interface, Sonix covers Automated transcription.
  • Prices and features above were last checked on 1 September 2026.

Where they differ

Only the attributes on which MateCat and Sonix actually diverge.

Attributes where MateCat and Sonix differ
AttributeMateCatSonix
Starting priceFree$10/month
Pricing modelOpen source, no licence feePer hour of transcription
Free tierYesNo
PlatformsWebWeb, API

Identical on both: user rating (Not yet rated), category (Translation).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in MateCat

  • Browser-based CAT interface
  • Machine translation suggestions
  • Translation memory
  • Quality assurance checks
  • Project management
  • File translation

Only in Sonix

  • Automated transcription
  • Translation
  • Synchronised editor
  • Subtitle export
  • Custom dictionary
  • Search across media
  • Pay-as-you-go option
  • Enterprise compliance

What people use each for

The jobs each tool is most often brought in to do.

MateCat

  • A freelance translator wanting a no-install, browser-based CAT tool with built-in machine translation suggestionsnot Sonix
  • A small agency wanting basic hosted project management without paying for a commercial TMSnot Sonix
  • A translator who wants MT suggestions from multiple engines surfaced alongside translation memory matches in one interfacenot Sonix
  • A team occasionally needing quick file translation through a browser without setting up desktop softwarenot Sonix

Sonix

  • A journalist transcribing interviews in several languages who needs the transcript searchable and quotable within minutes rather than accurate to a contractnot MateCat
  • A qualitative research team coding focus group transcripts, where speaker separation and an editable transcript matter more than a certified accuracy figurenot MateCat
  • A podcast producer generating subtitle files and show notes from each episode without adding a human transcription suppliernot MateCat
  • A small documentary team subtitling foreign-language footage where transcription and translation in one tool avoids a second vendornot MateCat

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

MateCat

  • The hosted version most users rely on depends on Translated srl’s continued operation and infrastructure decisions, unlike a self-run desktop tool.
  • It is developed by a commercial translation company whose own paid services sit alongside the free tool, which is worth being aware of when evaluating vendor neutrality.
  • Being browser-based, it requires a stable internet connection, unlike OmegaT’s fully offline desktop application.
  • Advanced terminology management and enterprise-scale project features are more limited than a paid commercial TMS such as memoQ or Smartling.
  • Self-hosting the open source LGPL code independently of Translated’s hosted service requires technical setup effort that most individual translators are unlikely to undertake.

Sonix

  • Monthly hour allowances are small relative to the subscription price: the $25 Core plan includes five hours, which at the published $10 overage rate means the subscription is only worth buying for storage and features rather than for the hours.
  • Unused hours do not accumulate into a meaningful reserve, so an irregular workload of a heavy month followed by a quiet one pays overage in the first and wastes allowance in the second.
  • There is no human correction tier at self-service prices, so anyone with an accessibility or legal accuracy obligation has to add a separate supplier or a member of staff to the workflow.
  • The cited 99 percent accuracy is a best-case figure on clean single-speaker audio, and overlapping speakers, strong accents, technical vocabulary and room noise degrade it enough that editing time, not transcription cost, becomes the real expense.
  • Storage is capped per plan at 25GB to 100GB, and video files consume it fast, so long-running teams end up deleting source media or upgrading a tier for storage they do not otherwise need.

Pricing, plan by plan

MateCat

Free
  • MateCatFree
    • Free browser-based CAT tool, LGPL licensed
    • Hosted and operated by Translated srl

Sonix

$10/month
  • Pay As You Go$10/month
    • $10 per hour transcribed
    • No subscription
    • 30 minutes free to trial without a card
  • Core$25/month
    • 5 hours a month of transcription and translation
    • 25GB storage
    • $275 a year if billed annually
  • Advanced$50/month
    • 20 hours a month
    • 50GB storage
    • $550 a year if billed annually
  • Pro$80/month
    • 40 hours a month
    • 100GB storage
    • $880 a year if billed annually

Which should you pick?

Choose MateCat if

  • You need browser-based cat interface.
  • You want to start without paying.
  • You also want machine translation suggestions.
MateCat review

Choose Sonix if

  • You need automated transcription.
  • You work on Web, API.
  • You also want translation.
Sonix review

Questions people ask

Is MateCat or Sonix better?
Neither clearly leads. MateCat starts at Free and Sonix at $10/month, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, MateCat or Sonix?
MateCat has a free tier; the other does not. Paid plans start at Free for MateCat and $10/month for Sonix.
Does MateCat or Sonix run on more platforms?
MateCat runs on Web. Sonix runs on Web, API.
Can I use MateCat for free?
Yes. MateCat has a free tier, so you can try it without paying. Sonix starts at $10/month.
What is MateCat best used for?
MateCat is most often used for a freelance translator wanting a no-install, browser-based cat tool with built-in machine translation suggestions, a small agency wanting basic hosted project management without paying for a commercial tms, a translator who wants mt suggestions from multiple engines surfaced alongside translation memory matches in one interface, a team occasionally needing quick file translation through a browser without setting up desktop software. Of those, a freelance translator wanting a no-install, browser-based cat tool with built-in machine translation suggestions and a small agency wanting basic hosted project management without paying for a commercial tms are not what Sonix is typically brought in for.
What can MateCat do that Sonix cannot?
MateCat covers Browser-based CAT interface, Machine translation suggestions, Translation memory, Quality assurance checks. Sonix covers Automated transcription, Translation, Synchronised editor, Subtitle export.

Answered from the vendors’ own pages

MateCat: Is MateCat really free?

Yes, it is free to use as a hosted browser-based tool and released as open source under the LGPL.

Sonix: What does Sonix cost per hour?

$10 an hour on pay-as-you-go, and $10 an hour for any usage beyond the monthly allowance on every subscription tier. That overage rate is published, which is unusual in this market.

MateCat: Who maintains MateCat?

Translated srl, an Italian translation company, develops and hosts it; this differs from OmegaT, which is maintained by a volunteer open source community.

Sonix: Is there human transcription?

No. Sonix is automated transcription plus an editor for you to correct. If you need a contracted accuracy level, this is the wrong category of product.

MateCat: Can I self-host MateCat instead of using Translated’s hosted version?

The code is open source under the LGPL and technically self-hostable, but doing so requires meaningful technical setup most individual users skip in favour of the hosted service.

Sonix: How accurate is it really?

The 99 percent claim assumes clean, single-speaker, standard-accent audio. Multi-speaker recordings with background noise land noticeably lower, and the cost shows up as your editing time.

Sonix: How many languages?

Transcription in over fifty languages and translation into a similar number, which is wider than most self-service competitors.

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