OpenSubs vs Seed Audio

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 Seed Audio
Detail	OpenSubs	Seed Audio
What it does	Free AI subtitle generator that runs entirely in your browser	AI text to speech and voice generator for realistic, multilingual speech
Stage	Not given	Not given
Founded	Not given	Not given
Based in	Not given	Not given
Pricing model	Not given	Freemium
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).	Basic: $4.95/month billed yearly (was $9.9/month), includes 960,000 TTS characters/year and 9,600 voice credits. Pro: $14.95/month billed yearly (was $29.9/month), includes 4,200,000 TTS characters/year and 42,000 voice credits. Enterprise: $24.95/month billed yearly (was $49.9/month), includes 9,60
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	Up to 1,000 characters per conversion on paid plans Voice model creation and storage
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	Fast generation allows instant iteration and regeneration of single lines Shared credits across text to speech, voice design, and voice cloning Consent-first voice cloning with private voice models No infrastructure management required, API handles all production needs
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	27 −1 (down) since last check
Trust Flow (Majestic)	10	6
Citation Flow (Majestic)	30	24
Referring domains (Majestic)	96	101

4 details filled in for both companies.

More alternatives to OpenSubs More alternatives to Seed Audio