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OpenSubs vs Kennmarq

A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.

OpenSubs compared with Kennmarq
DetailOpenSubs logo OpenSubsKennmarq logo Kennmarq
What it doesFree AI subtitle generator that runs entirely in your browser Watermarks and signed Content Credentials for AI images, video and audio
StageNot given Not given
FoundedNot given Not given
Based inNot given CH
Pricing modelNot given Freemium
PricingFree: transcription, translation on-device, all 12 subtitle styles, word-by-word highlighting, trimming, burning into video, and all export formats. Credits: $5 for 1,000 credits for cloud translation (approximately 1 credit per 30 subtitle lines). Free: 1,000 marks/month, 1 GB data, 10 API calls/minute. Indie: $9/month or $90/year (20,000 marks/month, 20 GB data, 60 calls/minute). Startup: $39/month or $390/year (150,000 marks/month, 150 GB data, 300 calls/minute). Scale: $149/month or $1,490/year (1,000,000 marks/month, 500 GB data, 1,000 ca
Key features
  • Speech recognition in the browser using Whisper
  • Translation to 20 languages including Chinese, Japanese, Korean, Spanish, Portuguese, French, German, Italian, Russian, Arabic, Hindi, Indonesian, Thai, Vietnamese, Turkish, Polish, Dutch and Ukrainia
  • Burn subtitles into MP4 without watermark
  • Export to SRT, VTT, ASS and TXT formats
  • Live subtitles over video playing in browser tabs via extension
  • Support for multiple video formats including MP4, MOV, WebM and MKV
  • No server processing—all work runs locally on user's machine
  • Middleware integration with Vercel AI SDK
  • Invisible watermarks on all marked content
  • Signed and time-stamped Content Credentials
  • Support for images, audio and video
  • Works with any AI model
  • Preserves existing provider credentials
  • JavaScript and Python SDKs
  • ComfyUI node support
  • Compliance receipts per jurisdiction
  • Safety check for marked content
What makes it different
  • 100% browser-based with no uploads—the video never leaves your machine
  • Completely open source under AGPL-3.0-or-later so you can verify the code
  • Free forever for transcription, styling and burning—pay only for optional cloud translation
  • No watermark, no file-size limit, no queue, and no account needed to try
  • Covers EU AI Act, California, Washington, Utah and other jurisdictions with single middleware
  • No need to obtain own C2PA certificate
  • Transparent pricing with same features across all plans
  • Data stored and backed up in Switzerland
  • Test keys with separate allowance don't consume live marks
Free planNot given Not given
Open sourceNot given Not given
PlatformsNot given Not given
Public APINot given Not given
Community votes00
DR (Domain Rating by Ahrefs)34 −1 (down) since last check7 +7 (up) since last check
Trust Flow (Majestic)100
Citation Flow (Majestic)3013
Referring domains (Majestic)961

4 details filled in for both companies.

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