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Line 21

CommunicationPaid

Comprehensive real-time captioning solutions for all your accessibility needs.

Last updated Apr 18, 2026

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What is Line 21?

Line 21 offers a comprehensive suite of services focused on captions and accessibility. They support a variety of clients, including event organizers and agencies, with both human and AI captioning solutions. Their services range from live captioning provided by experienced stenographers to AI-powered proofreading, translations, and automatic speech recognition. With a global network of professional captioners, Line 21 ensures coverage in numerous languages and time zones. They also provide technical support and have solutions tailored for live events, education, corporate use, and broadcasting. Additional offerings include electronic notetaking and access to government schemes like the UK's Access to Work.

Line 21's Top Features

Key capabilities that make Line 21 stand out.

Human and AI-powered captioning

Live support during events

AI Proofreader for context-aware error correction

AI Translations in 120 languages

Automatic Speech Recognition with high accuracy

Global network of professional captioners

Low latency video caption encoding

Transcripts available in multiple formats

Technical support for setup and integration

Accessibility in over 100 languages

Use Cases

Who benefits most from this tool.

Event Organizers

Ensure accessibility for all audience members by providing real-time captions during live events.

Educational Institutions

Facilitate inclusive learning by offering real-time, multilingual captions for virtual and in-person classes.

Broadcast Networks

Deliver accurate and timely captions for live broadcasts, including news and sports events.

Corporations

Enhance corporate communication with real-time captions during meetings and conferences, ensuring inclusivity and compliance.

Captioning Agencies

Leverage advanced AI and human captioning for a variety of client needs, across different languages and specializations.

Deaf or Hard of Hearing Individuals

Access real-time captions for better engagement in live events, educational settings, and workplace meetings.

Government Programs

Support accessibility initiatives such as the UK's Access to Work scheme with reliable real-time captioning.

Technical Teams

Receive dedicated support and consultation for setting up and managing captioning integrations and deliveries.

Concert Organizers

Provide captions for lyrics and dialogues, making performances accessible to all attendees.

Students

Benefit from electronic notetaking for a condensed version of lectures, enhancing study and review sessions.

Explore Top AI Use Cases

Tags

captionsaccessibilityAI captioninghuman captioninglive captioningproofreadingtranslationsautomatic speech recognitiontechnical supportlive eventseducationcorporate usebroadcastingnotetakinggovernment schemes

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Frequently Asked Questions

What types of captioning services do you offer?
We offer both human and AI-powered captioning solutions, including live captioning, automatic speech recognition, and AI proofreading.
How accurate are your live captions?
Our live captions are produced by accredited stenographers and respeakers, offering high accuracy and typically reaching speeds of up to 300 words per minute.
Can you provide captions in different languages?
Yes, we support captions, translations, and proofreading in over 100 languages thanks to our global network of professional captioners and advanced AI models.
What technical support do you offer?
We provide dedicated technical support, including live event support, caption encoding, and assistance with setup and integration across multiple platforms.
How does your AI Proofreader work?
The AI Proofreader safeguards against typos and name errors using context-aware AI. It can be fine-tuned with context-specific glossary and terms.
What is the cost of your AI services?
AI Proofreading costs $1 per minute, AI Translations cost $0.15 per minute, and Automatic Speech Recognition (ASR) costs $0.25 per minute.
How do I download transcripts after a session?
All captioner transcripts are available to download in multiple formats (TXT, SRT, VTT) immediately at the end of your session.
Can you provide services for specific industries or specialized terminology?
Yes, we can. Our network includes specialists in various fields, ensuring accurate captions even for tricky terminology or specific industry jargon.
Do you offer services for in-person events?
Yes, we support both virtual and in-person events. You will need an internet connection to use our services even for in-person events.
How does your billing system work?
We offer a basic pay-as-you-go plan, and you pay for minutes used at the end of each month. There are also bundles available for upfront purchase with potential discounts.