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OpenSubs vs ImgBulk

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 ImgBulk
DetailOpenSubs logo OpenSubsImgBulk logo ImgBulk
What it doesFree AI subtitle generator that runs entirely in your browser Bulk AI image generator for creating 100+ images at once
StageNot given Not given
FoundedNot given Not given
Based inNot given Not given
Pricing modelNot given Paid
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). Pay-as-you-go credit packs: Starter €8.00 (650 credits), Creator €26.00 (3,600 credits with 700 bonus), Pro €62.00 (9,000 credits with 2,100 bonus), Bulk €125.00 (20,000 credits with 6,100 bonus). GPT Image 2 costs 8 credits per image at 1K resolution, 12 at 2K, 16 at 4K. Nano Banana 2.1 costs 12 cr
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
  • Generate up to 200 tasks per batch
  • Import prompts from CSV or Excel files
  • Different prompts and reference images per task
  • Track progress across all tasks in one workspace
  • Retry only failed tasks without rerunning successful ones
  • Download all completed images as a ZIP file
  • Support multiple AI models including GPT Image 2, Nano Banana 2, and Seedream
  • Preview estimated credits before starting generation
  • Batch image editing and processing tools
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
  • Organize hundreds of image tasks in one browser workspace instead of repetitive one-by-one uploads
  • Transparent credit pricing shown before generation with no charges for failed tasks
  • Import large prompt lists directly from CSV and Excel files
  • Use multiple frontier AI models in one workspace including GPT Image 2, Nano Banana, and Seedream
  • Pay-as-you-go with no subscription or monthly charges
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 check16 no change since last check
Trust Flow (Majestic)107
Citation Flow (Majestic)3029
Referring domains (Majestic)9659

4 details filled in for both companies.

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