Enterprise Subtitle Infrastructure
Bring your subtitles to life
Not just what is being said, but how.
1.6× preferred over standard captions · 81.9% want it on streaming platforms — see the research
See it in action
Watch how PHONT Stage transforms standard subtitles into emotionally expressive captions in real-time.
Demo paused while off-screen
Live demo powered by PHONT Stage API •Open full demo →
Validated by data
Results from a controlled online study with 346 participants, validated with 65+ members of the Berlin Deaf Community.
"Describe the sound with subtitles. That way I feel like I can hear."
"The subtitles emphasize the emotion of the moment."
"Please make PHONT available on public channels!"
Integrate in minutes
Player-agnostic SDK that works with your existing stack. No player modifications required.
Clean APIs
Typed SDKs with full TypeScript support. RESTful endpoints for VOD processing and WebSocket for real-time updates.
POST /vods → GET /vods/{id} → GET /vod-subtitles/{id}Simple Workflow
Submit your VOD manifest, poll for status, retrieve enriched subtitles. Processing takes ~10 min per hour of content.
{ status: "complete", subtitles: [...] }Rich Output
Emotion tags, speaker identification, timing data, and styling hints. WebVTT & TTML output formats supported.
{ emotion: "joy", speaker: 1, glow: "#FFD700" }import { PhontSubtitles } from '@phont/subtitles';
// Initialize with your player instance
const phont = new PhontSubtitles({
player: bitmovinPlayer,
apiKey: process.env.PHONT_API_KEY,
mode: 'karaoke', // or 'sentence'
expressiveness: 0.8, // 0-1 intensity slider
});
// Load subtitles for a VOD
await phont.load(vodId, { lang: 'en' });How it works
Audio analysis pipeline that extracts emotion, speaker dynamics, and environmental context from your content.
Sentence Mode
Traditional subtitle display with emotion styling applied per cue. Familiar UX with expressive enhancements.
Karaoke Mode
Word-by-word highlighting synced to speech. Perfect for music, dialogue-heavy content, and accessibility.
Who benefits from expressive subtitles?
Research-backed insights on the audiences driving subtitle adoption and the measurable impact of emotional captions.
Enterprise ready
Infrastructure that grows with your platform. From pilot to millions of viewers.
Enhanced Engagement
Studies show expressive captions increase viewer retention and satisfaction across all audiences.
EAA & CVAA Ready
Emotional subtitles and closed captions that meet European Accessibility Act and FCC requirements. Future-proof compliance built in.
Flexible Deployment
Hosted cloud, hybrid, or fully on-premise. Your infrastructure, your rules.
Your Brand, Your Data
White-label rendering. On-premise deployment keeps content in your pipeline.
Simple, usage-based pricing
Pay only for what you process. No setup fees, no minimums.
€0.12/minute58% off during launch
€200 free credits when you sign up
That's over 4,000 minutes of processing, free.
Questions? We'd love to hear from you.