The Enterprise Media Localisation AI Platform for Multilingual Subtitling

AI model agnostic delivery of accurate language and domain specific captions at enterprise scale.

Trusted by the world's very largest and best content owners from AWS to NVIDIA.

Combines AI speed, intelligent patented language processing, market leading automation and workflow + human-in-the-loop quality control. 450+ languages and every major video platform and format supported.

Global-ready from day one

Translate and localise subtitles into 300+ languages with built-in machine translation, TMS connectors and editing and workflow tools.

Natural Captions® technology

Captions that read naturally—powered by our proprietary technology built to handle the complexities of real language.

AI-powered subtitling at scale

Accelerate workflows with cutting-edge AI - fine-tune with precision terminology and training.

Frame-perfect precision

Subtitle with frame accuracy with professional QC tools used by broadcast and enterprise giants – supporting all major file formats.

Seamless team collaboration

Assign roles, manage workflows, and track progress — all in one secure platform.

Output control, your way

Export in all major subtitle formats or publish directly to your online video platforms. Full control over timing, styling, and delivery—wherever your content needs to go.

Feature checklist

  • Frame-accurate editing
  • In-editor style formatting
  • Auto-transcription
  • Timeline editing
  • Custom dictionaries
  • Subtitle rendering
  • VTT, SRT, STL, TTML, and more
  • Stretchable editor panels
  • Speaker-based caption splitting
  • Hard/soft limit controls
  • Support for TMS leaders
  • Custom terminology
  • Multiple AI translation engines
  • Profanity, brevity, & tone settings

See how leading brands manage end-to-end localisation with CaptionHub

TED

Spreading ideas at a massive scale

Allianz

Allianz reach a global audience at blazing speed with CaptionHub

Subway

Localising video content for global franchisees

Built for enterprise scale

Whether you're building your business, expanding internationally, or cutting costs—CaptionHub works for you.

Unparalleled scale

CaptionHub's infrastructure and application architecture powers the world's most demanding subtitling and workflow requirements, without missing a beat.

Quality and accuracy

We responsibly leverage AI to enhance caption accuracy, tailored specifically to your language domain, ensuring precision and relevance in communication.

Completely flexible

Customise CaptionHub to fit your business and give you the controls you need with policies, roles, and approval workflows.

Security by design

Your data security is our top priority. We have ISO 27001 certification and Cyber Essentials Plus, and we're GDPR compliant. So you can rest assured that your content and data is safe.

Intelligent, connected multimedia localisation.

CaptionHub is an AI-powered collaborative platform for multilingual subtitling and voiceover.