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CaptionHub is an AI-powered collaborative platform for multilingual subtitling, voiceover, and live captioning. It supports 300+ languages for subtitles, 120+ AI voices, and real-time live captions in 200+ languages, with no-code automation, API integration, and enterprise-grade security.
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Short answers to the questions buyers and builders commonly ask about CaptionHub. Each answer cites the shared ledger below, where every source is listed once.
AI-powered collaborative platform for multilingual subtitling and voiceover · No-code automation for instant transcription and translation of video content into multipl · Natural text-to-speech voiceover with realistic AI voices in any voice, style, and languag · CaptionHub Connect for secure vendor collaboration on subtitle sharing
AI-powered collaborative platform for multilingual subtitling and voiceover.
Brands, marketing teams, language agencies, and large organizations with complex needs · Enterprise media ops teams managing large and rapidly growing video archives · Localisation leads running multi-vendor, multi-language programmes · IT and DevOps teams who need API-level control over caption workflows and integrations
Perfect for brands and marketing teams creating multilingual content
Multimedia localisation for brands and language agencies · Managing large-scale localisation workflows between teams, vendors, and content · Automated, large-scale video captioning and localisation workflows · Enterprise media localisation AI platform for video, broadcast and live events
Perfect multimedia localisation for brands and language agencies
Headless API-operated workflows with automation templates applicable via UI, API, or on pr · Start/stop stream API for live caption control
Apply Automation templates via UI, API, or on project creation
Brightcove (Dynamic Ingest), Google Drive, Qumu Cloud, Qumu VCC, JW Player, Kaltura, Mux, · CaptionHub Connect provides automatic vendor routing for translation work · HLS, RTMP and SRT streaming protocol inputs for live captioning · MUX stream integration, THEOplayer live support and Brightcove support
Media import from: Brightcove (Dynamic Ingest), Google Drive, Qumu Cloud, Qumu VCC, JW Player, Kaltura, Mux, Vimeo, YouTube, UI, or API
Custom deployment including VPC and custom data residency (Enterprise tier)
Custom deployment including VPC
This profile connects the jobs CaptionHub is described as handling with its delivery model, access options and the subjects used to match it to related products in this directory.
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CaptionHub - AI-Powered Subtitling Platform
AI-powered collaborative platform for multilingual subtitling and voiceover · No-code subtitling-at-scale for instant transcription and translation of video content · Realistic AI voiceover in 100+ languages with 120+ lifelike voices and voice cloning
AI-powered collaborative platform for multilingual subtitling and voiceover
Multimedia localisation for brands and language agencies
Brands, marketing teams, language agencies, and large organizations with complex needs
No-code automation for instant transcription and translation of video content into multiple languages
Natural text-to-speech voiceover with realistic AI voices in any voice, style, and language
CaptionHub Connect for secure vendor collaboration on subtitle sharing
Custom deployment including VPC and custom data residency (Enterprise tier)
ISO 27001 certification, Cyber Essentials Plus, and GDPR compliant
ISO27001, SOC2 Type 2 and GDPR compliance (Enterprise tier), with MFA, SSO & SCIM, watermarking, and IP whitelisting
A concise view of the jobs, capabilities and integrations described in the recorded product sources.
Documented product formats, platforms and official distribution destinations. Availability can vary by region and plan.
A concise history of software releases and material product changes. Events appear only when a dated source supports what changed.
Showing the newest updates and meaningful milestones. Open an entry for its summary and source.
On December 7, 2025, CaptionHub published a case study describing how Timbra provided live captioning into a global sports brand's flagship broadcast via their Brightcove platform after on-site encoders failed to arrive.
View source [16]On October 20, 2025, CaptionHub published a blog post addressing organizations affected by cielo24 ceasing operations on September 30, 2025 after its acquisition by Rev.
View source [11]After cielo24 ceased operations on 30 September 2025 following its acquisition by Rev, CaptionHub published an analysis positioning its enterprise accessibility and localisation platform against Rev's offerings.
View source [11]On March 3, 2025, CaptionHub published an article explaining the European Accessibility Act 2025 requirements for closed captions and subtitles in television broadcasts and streaming services.
View source [15]Facts, answers, structured details, milestones and primary resource links cite this shared ledger. Each external page appears once; release tags from the same GitHub project are grouped under one release history.
These tools share a workflow, capability or audience with CaptionHub. They may complement it rather than replace it, and are not presented as integrations or endorsements.
AI-powered collaborative platform for multilingual subtitling and voiceover
Managing large-scale localisation workflows between teams, vendors, and content
CaptionHub Ltd
England and Wales
ISO 27001, SOC2 Type 2, and GDPR compliance
AI-powered collaborative platform for multilingual subtitling and voiceover
Automated, large-scale video captioning and localisation workflows
Enterprise media ops teams managing large and rapidly growing video archives
Localisation leads running multi-vendor, multi-language programmes
IT and DevOps teams who need API-level control over caption workflows and integrations
No-code to full-code automated subtitling workflows with rule-based task routing
AI voiceover in 100+ languages with editing and voice cloning support
Real-time multilingual live captions in 200+ languages via Timbra
Brightcove (Dynamic Ingest), Google Drive, Qumu Cloud, Qumu VCC, JW Player, Kaltura, Mux, Vimeo, YouTube
CaptionHub Connect provides automatic vendor routing for translation work
Headless API-operated workflows with automation templates applicable via UI, API, or on project creation
HLS, RTMP, or SRT inputs supported for live captioning
AI voiceover with 120+ lifelike voices and voice cloning support
Real-time multilingual live captioning in 200+ languages
Subtitle translation and localisation into 300+ languages with built-in machine translation
Frame-accurate subtitle editing for broadcast-quality timing
Natural Captions® proprietary captioning technology
Subtitle output in VTT, SRT, STL, TTML and other major formats
HLS, RTMP and SRT streaming protocol inputs for live captioning
MUX stream integration, THEOplayer live support and Brightcove support
Start/stop stream API for live caption control
Enterprise media localisation AI platform for video, broadcast and live events
Trusted by enterprise content owners including AWS, NVIDIA, TED, Allianz and Subway
