Free / Open-sourceAI audio platform for speech, agents, music and dubbing
Free / Open-sourceAI audio platform for speech, agents, music and dubbing
Checksub records 103,481 monthly visits with -25.6% month-over-month growth and Free Trial, Paid pricing. Papercup records 0 monthly visits with -100% growth and Contact for Pricing pricing.
AI dubbing and voiceover for global video and audio localization
| Dimension / Metric | ![]() | |
|---|---|---|
| Official Domain | checksub.com | papercup.com |
| Pricing Model | Free Trial, Paid | Contact for Pricing |
| Monthly Visits | 103.48K (103,481) | 0 (0) |
| MoM Traffic Delta | -35.55K (-25.6%) | -204 (-100%) |
| Primary Market & Share | 🇸🇬 Singapore (9.9%) | 🌐 Global (—) |
| Direct Visits / mo | 54.37K | 0 |
| User Rating | 4.2 | 4.1 |
| Supported Platforms | Website | Website |

AI subtitles, dubbing and 200-language video translation in one browser editor
Generates accurate captions with AI, then lets you apply dozens of style presets and animations, including one-click karaoke effects, before exporting burned-in video or subtitle files.
Machine translation built specifically for subtitles, so line lengths and timing stay readable instead of copying a generic document translator.
Separates music and background noise from the original voices, then replaces only the speech with realistic AI dubbing so the audio atmosphere is preserved.
Clone a speaker's voice from a sample and use it to replace the original voice-over across dozens of languages with a natural delivery.
AI dubbing and voiceover for global video and audio localization
Automatic speech recognition with expert review and speaker detection to structure multi-speaker scripts clearly.
Machine translation accelerates localization while professional linguists protect tone, meaning and consistency.
Ethically sourced voices, plus the option to replicate a speaker's voice or match accents across languages.
Editable transcripts and translations let teams refine timing, synchronization and lip-sync alignment.
Free / Open-sourceAI audio platform for speech, agents, music and dubbing
Free / Open-sourceAI audio platform for speech, agents, music and dubbing
AI transcription, subtitles and video translation in one browser studio
AI transcription, subtitles and video translation in one browser studio

Free / Open-sourceTranslate, dub, and lip-sync videos into 160+ languages
Free / Open-sourceTranslate, dub, and lip-sync videos into 160+ languages
Free / Open-sourceFree AI video dubbing and lip-sync in 170+ languages
Free / Open-sourceFree AI video dubbing and lip-sync in 170+ languages

Free / Open-sourceAI video dubbing, subtitles and text-to-speech in 10+ languages
Free / Open-sourceAI video dubbing, subtitles and text-to-speech in 10+ languages

Free / Open-sourceAI dubbing, avatars and live translation in one multilingual platform
Free / Open-sourceAI dubbing, avatars and live translation in one multilingual platform

AI video dubbing and localization in 135+ languages with your own voice
AI video dubbing and localization in 135+ languages with your own voice
Free / Open-sourceTranslate and dub videos into 140+ languages with voice cloning and lip sync
Free / Open-sourceTranslate and dub videos into 140+ languages with voice cloning and lip sync

Free / Open-sourceTranslate videos into 30+ languages with editable subtitles and AI voices
Free / Open-sourceTranslate videos into 30+ languages with editable subtitles and AI voices
Free / Open-sourceTranslate and dub videos into 120+ languages with AI
Free / Open-sourceTranslate and dub videos into 120+ languages with AI

AI video localization and lip sync in 80+ languages
AI video localization and lip sync in 80+ languages

AI video, audio, and document translation with dubbing and subtitles
AI video, audio, and document translation with dubbing and subtitles