OpenSubs vs ProductX

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 ProductX
Detail	OpenSubs	ProductX
What it does	Free AI subtitle generator that runs entirely in your browser	AI video ads that convert
Stage	Not given	Not given
Founded	Not given	Not given
Based in	Not given	Not given
Pricing model	Not given	Not given
Pricing	Free: 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 plan with 10 welcome credits on signup, no subscription. Starter at $39/month with 198 credits per month. Enterprise with custom credits and billing. Annual plans available with discounts. Credits vary by workflow: Ad Video and Product Video storyboard planning 1 credit; 4s video renders 16 cre
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	Support for 20+ languages with AI dubbing Full commercial usage rights for generated videos
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	Purpose-built for ecommerce with focus on conversion metrics, not just polish Reduce production overhead through AI-assisted workflows
Free plan	Not given	Not given
Open source	Not given	Not given
Platforms	Not given	Not given
Public API	Not given	Not given
Community votes	0	0
DR (Domain Rating by Ahrefs)	34 −1 (down) since last check	22 −1 (down) since last check
Trust Flow (Majestic)	10	8
Citation Flow (Majestic)	30	25
Referring domains (Majestic)	96	41

4 details filled in for both companies.

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