Line 21 Description
Line 21 offers AI-powered live subtitles and captions to ensure seamless accessibility for digital content, streaming platforms and live events. Our hybrid approach combines AI automation and human expertise to deliver high-accuracy subtitles that adapts to industry-specific terminologies, accents, or niche references. Our AI Proofreader enhances real-time captions to reduce errors and make live experiences more engaging.
Our solution is for event organizers and broadcasters who require high-quality, scalable captions. ASR solutions are often inaccurate and expensive, while traditional human captioning is costly and non-scalable. Line 21 bridges the gap by offering real time AI-enhanced subtitles that seamlessly integrate into event tech and stream workflows.
Line 21 Alternatives
Riverside
Riverside is the leading AI-powered platform for creating studio-quality video and audio content—combining recording, live streaming, and editing into one seamless workflow. Its local recording engine ensures each participant’s feed is captured in 4K resolution and uncompressed WAV audio, guaranteeing professional quality regardless of internet stability. Creators can edit recordings like a document using text-based editing, instantly removing filler words or silences, while multi-track editing offers fine-grained control over layout and sound balance. Riverside’s suite of AI tools—including Magic Audio for automatic sound enhancement, AI Voice for natural text-to-speech, and Magic Clips for social media snippets—cuts post-production time dramatically. Users can also generate AI Show Notes with ready-to-publish titles, descriptions, and keywords for SEO optimization. The platform supports HD livestreaming and webinars, enabling creators to host, record, and repurpose events effortlessly. Collaboration tools and brand customization make Riverside a perfect choice for content teams, educators, and enterprise creators. By merging AI efficiency with creative control, Riverside empowers anyone to produce broadcast-level content from anywhere.
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Google Cloud Speech-to-Text
An API powered by Google's AI technology allows you to accurately convert speech into text. You can accurately caption your content, provide a better user experience with products using voice commands, and gain insight from customer interactions to improve your service. Google's deep learning neural network algorithms are the most advanced in automatic speech recognition (ASR). Speech-to-Text allows for experimentation, creation, management, and customization of custom resources. You can deploy speech recognition wherever you need it, whether it's in the cloud using the API or on-premises using Speech-to-Text O-Prem. You can customize speech recognition to translate domain-specific terms or rare words. Automated conversion of spoken numbers into addresses, years and currencies. Our user interface makes it easy to experiment with your speech audio.
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SyncWords
SyncWords leads the industry in automating captions and subtitles for both live and pre-recorded media. We unite specialists from broadcasting, machine learning, and web design to develop exceptional and groundbreaking solutions. Our proprietary artificial intelligence and automation technologies are integrated throughout the entire captioning workflow. For online meetings and streaming platforms, we provide real-time live subtitles, enhancing accessibility and engagement. Event producers can also benefit from our live captioning services during their events, ensuring audiences can follow along seamlessly. Additionally, we cater to OTT and broadcast platforms by delivering subtitled content in over 100 languages globally. Our Caption Media solution enables the rapid and cost-effective creation of high-quality captions using top-tier AI technology. For those without existing transcripts, our Transcribe Media service allows for easy caption production, with options for both human and automatic speech recognition (ASR). Furthermore, we offer translation services to create subtitles in more than 100 languages, broadening the reach of your content. Ultimately, our commitment to innovation positions us as a leader in the captioning and subtitling landscape.
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AI-Media LEXI
The LEXI AI-Powered Captioning Toolkit employs sophisticated artificial intelligence to facilitate automatic captioning for both live broadcasts and pre-recorded materials. This innovative tool provides captions of exceptional quality that closely match human accuracy while significantly lowering costs. It features LEXI Automatic for real-time captioning, LEXI Recorded for rapid caption generation of previously recorded content, and LEXI Translate, which enables multi-language captioning and translation to cater to international audiences. Furthermore, LEXI includes on-premises solutions that guarantee secure, real-time captioning as well as LEXI Library for straightforward archiving, editing, and searching of captions. Ultimately, this toolkit is crafted to enhance the efficiency of producing, managing, and disseminating captions and subtitles across a wide array of platforms and media formats, thereby promoting accessibility and viewer engagement while simplifying the entire workflow. In this way, LEXI serves as a comprehensive solution for all captioning needs.
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Pricing
Pricing Starts At:
$0.09/min
Pricing Information:
Pay as you go
Integrations
Company Details
Company:
Line 21
Year Founded:
2023
Headquarters:
United Kingdom
Website:
line-21.com
Media
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Product Details
Platforms
Web-Based
Types of Training
Training Docs
Live Training (Online)
Training Videos
Customer Support
Online Support
Line 21 Features and Options
Speech Recognition Software
Audio Capture
Automatic Form Fill
Automatic Transcription
Call Analysis
Concatenated Speech
Continuous Speech
Customizable Macros
Multi-Languages
Specialty Vocabularies
Speech-to-Text Analysis
Variable Frequency
Voice Recognition
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