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CaptionHub
CaptionHub · London, England, United Kingdom · founded 2015
What it is
CaptionHub is a business-only, AI-powered platform for producing multilingual subtitles and voiceovers collaboratively. Its subtitling tools translate and localize content into more than 300 languages, while Natural Captions technology is designed for natural reading and complex real-language cases. Editors get frame-accurate and timeline editing, custom dictionaries, speaker-based splitting, hard and soft limits, and workflow collaboration. Exports include VTT, SRT, STL, TTML, other subtitle formats, and burnt-in subtitles, or content can be published directly to online video platforms. CaptionHub Voiceover creates spoken audio with AI voices across voices, styles, and languages. Studio adds automation for ingest, processing, translation, and publishing, plus API, SDK, webhooks, and web-socket access. Deployment can be cloud, on-premises, hybrid, or VPC. Integrations include Brightcove, Vimeo, Google Drive, DeepL, OpenAI, Whisper, and others. Usage is measured in output minutes, while synthetic voice minutes are billed when created.
For and against
For
- Supports localization into 300+ languages
- Offers collaborative editing and approval workflows
- Exports VTT, SRT, STL, and TTML
- Provides API, SDK, webhooks, and web-sockets
- Supports cloud, on-premises, hybrid, and VPC deployment
Against
- Consumer use is prohibited
- No free plan
- Usage is measured in output minutes
- Voiceover minutes are billed when created
The verdict
CaptionHub brings subtitle editing, translation, AI voiceover, workflow automation, and enterprise deployment into one business platform. Its usage-based billing and business-only terms should shape purchasing decisions.
Who it suits
CaptionHub is for businesses managing multilingual subtitle, dubbing, and localization workflows. Consumer use is prohibited under its subscription terms.
Plans and prices
Studio
Huge output-minute and user volumes · automation · Timbra · Analytics
Read 1 Oct 2026 · captionhub.com
Enterprise
Everything in Professional, plus custom InfoSec and contracting · custom integrations · AWS/GCP VPC deployment · enhanced 24/7 support
Read 1 Oct 2026 · captionhub.com
Creator & Agency
No subscription or commitment · buy minutes and use them at your pace · captioning, subtitle editing, AI transcription/translation, voiceover, exports, collaboration
Read 1 Oct 2026 · captionhub.com
On the record
- Audience restriction
- The subscription terms state that consumer use is prohibited and the service is for business use only.captionhub.com · read 1 Oct 2026
- Automation and API
- Studio includes automation across ingest, processing, translation and publishing, plus API, SDK, webhooks and web-socket access.captionhub.com · read 1 Oct 2026
- Billing limit
- Usage is measured in output minutes, which are deducted when a language version is first downloaded or published; voiceover minutes are billed when synthetic voice creation occurs.support.captionhub.com · read 1 Oct 2026
- Caption technology
- Natural Captions technology is designed to produce captions that read naturally and handle real-language complexity.captionhub.com · read 1 Oct 2026
- Deployment
- CaptionHub can run in the cloud, on-premises, in hybrid environments or inside a VPC.captionhub.com · read 1 Oct 2026
- Editing and workflow
- The platform provides frame-accurate editing, timeline editing, custom dictionaries, speaker-based splitting, hard and soft limit controls, and workflow collaboration.captionhub.com · read 1 Oct 2026
- Integrations
- Listed integrations include Brightcove, Kaltura, Google Drive, JW Player, Mux, Cloudflare, Vimeo, Phrase, Smartling, XTM, Trados, LILT, Crowdin, DeepL, OpenAI, Amazon Translate, Blackbird.io, Whisper and Speechmatics.captionhub.com · read 1 Oct 2026
- Language coverage
- Its subtitling platform translates and localizes subtitles into 300+ languages.captionhub.com · read 1 Oct 2026
- Output formats
- Users can export VTT, SRT, STL, TTML and other subtitle formats, including burnt-in subtitles, or publish directly to online video platforms.captionhub.com · read 1 Oct 2026
- Security compliance
- CaptionHub states that it is ISO 27001 certified, SOC 2 II certified and GDPR compliant, with TLS and 256-bit encryption, role-based access controls, MFA, SSO, IP whitelisting and audit trails.captionhub.com · read 1 Oct 2026
- Support
- Enterprise support options include PagerDuty and Slack Connect support, including 24/7 coverage, while support plans with SLAs and localization consulting are available.captionhub.com · read 1 Oct 2026
- Voiceover
- CaptionHub Voiceover uses realistic AI voices to generate spoken audio in any voice, style and language.captionhub.com · read 1 Oct 2026
- What it does
- CaptionHub is an AI-powered collaborative multimedia localization platform for multilingual subtitles and voiceover at scale.captionhub.com · read 1 Oct 2026
