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OpenSubs vs QuestStudio

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 QuestStudio
DetailOpenSubs logo OpenSubsQuestStudio logo QuestStudio
What it doesFree AI subtitle generator that runs entirely in your browser All-in-one AI studio for creating product images, videos, voiceovers, and music
StageNot given Not given
FoundedNot given Not given
Based inNot given Not given
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: 5 FLUX Schnell images total, no card required. 7-day trial: 100 credits after adding a card, $0 today, then Starter at $14.99/month, Pro at $34.99/month, or Studio at $79.99/month. Starter: 1,000 credits/month, 10 GB storage. Pro: 2,500 credits/month, 50 GB storage. Studio: 5,500 credits/month
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
  • Image generation with multiple AI models including FLUX, Seedream, Stable Diffusion
  • Character design and consistent character creation
  • Brand asset management and Ad Studio for campaigns
  • Planning and prompt refinement tools
  • Editing tools including background removal and upscaling
  • Reference-guided image generation from uploaded assets
  • Commercial usage rights on paid generations
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
  • Single unified interface and credit system instead of multiple subscriptions
  • All AI models integrated in one studio with no tab switching needed
  • Full model selection and advanced controls available beyond guided workflows
  • Transparent credit costs shown before generation begins
  • Free exploration with limited credits before requiring a card
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 check13 +1 (up) since last check
Trust Flow (Majestic)106
Citation Flow (Majestic)3029
Referring domains (Majestic)9652

4 details filled in for both companies.

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