AutoSubtitles Line 21

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AutoSubtitles:

About

AutoSubtitles is a browser-based AI subtitle generator built for creators who want to turn ordinary videos into highly engaging content in seconds. Creators can generate accurate subtitles in 20+ languages with automatic language detection that handles accents, background noise, and multiple speakers. Designed for YouTube, TikTok, Instagram Reels, Shorts, podcasts, and online courses, AutoSubtitles focuses on fast, engagement-driven captions. The platform includes 25+ animated subtitle presets — including Classic, Neon, Karaoke, Street, and Corporate — with dynamic motion effects and highlighted words designed to boost watch time and retention. Users can fully customize fonts, colors, positioning, backgrounds, and animations, while the built-in editor offers word-level editing and precise timing controls. AutoSubtitles runs directly in the browser, offers a free tier with no signup required, and is built for speed, simplicity, and privacy.
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About

Line 21 provides AI-powered live captions and subtitles, ensuring seamless accessibility for live events, streaming platforms, and digital content. Our hybrid approach combines AI automation with human expertise, delivering high-accuracy captions that adapt to industry-specific terminology, accents, and niche references. By leveraging our AI Proofreader, we enhance real-time captions, reducing errors and making live experiences more inclusive and engaging. Our solution is designed for event organizers, broadcasters, and language service providers who need scalable, cost-effective, and high-quality captions. Traditional human captioning is expensive and non-scalable, while ASR solutions often lack accuracy. Line 21 bridges this gap by offering real-time AI-enhanced captions that integrate seamlessly into event tech and streaming workflows.
AutoSubtitles:

Platforms Supported

Windows Not Supported
Mac Not Supported
Linux Not Supported
Cloud Supported
On-Premises Not Supported
iPhone Not Supported
iPad Not Supported
Android Not Supported
Chromebook Not Supported
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Platforms Supported

Windows Not Supported
Mac Not Supported
Linux Not Supported
Cloud Supported
On-Premises Not Supported
iPhone Not Supported
iPad Not Supported
Android Not Supported
Chromebook Not Supported
AutoSubtitles:

Audience

Marketers, podcasters, creators
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Audience

Users that need an AI-powered live captioning and subtitling tool
AutoSubtitles:

Support

Phone Support Not Supported
24/7 Live Support Not Supported
Online Supported
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Support

Phone Support Not Supported
24/7 Live Support Not Supported
Online Supported
AutoSubtitles:

API

Offers API Not Supported
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API

Offers API Not Supported
AutoSubtitles:

Screenshots and Videos

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Screenshots and Videos

AutoSubtitles:

Pricing

$9/month
Free Version Supported
Free Trial Not Supported
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Pricing

$0.09/min
Pay as you go
Free Version Not Supported
Free Trial Not Supported
AutoSubtitles:

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

Review this Software
Line 21:

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

Review this Software
AutoSubtitles:

Training

Documentation Supported
Webinars Not Supported
Live Online Not Supported
In Person Not Supported
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Training

Documentation Supported
Webinars Not Supported
Live Online Supported
In Person Not Supported
AutoSubtitles:

Company Information

AutoSubtitles
Founded: 2025
United Kingdom
autosubtitles.com
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Company Information

Line 21
Founded: 2023
United Kingdom
line-21.com
AutoSubtitles:

Alternatives

Zubtitle

Zubtitle

5.0 out of 5 stars
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Alternatives

AutoSubtitles:
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AI-Media LEXI

AI-Media LEXI

AI-Media
AutoSubtitles:
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CapMate

CapMate

Venera Technologies
AutoSubtitles:
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AutoSubtitles:
CapMate

CapMate

Venera Technologies
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AutoSubtitles:

Categories

Subtitle Supported
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Categories

Closed Captioning Supported
Speech Recognition Supported
Speech to Text Supported
Subtitle Supported
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Speech Recognition Features

Audio Capture Supported
Automatic Form Fill Supported
Automatic Transcription Supported
Call Analysis Supported
Concatenated Speech Supported
Continuous Speech Supported
Customizable Macros Supported
Multi-Languages Supported
Specialty Vocabularies Supported
Speech-to-Text Analysis Supported
Variable Frequency Supported
Voice Recognition Not Supported
AutoSubtitles:

Integrations

Deepgram Not Supported
Facebook Not Supported
Microsoft Teams Not Supported
OpenAI Not Supported
Twitch Not Supported
Videolinq Not Supported
YouTube Not Supported
Zoom Not Supported
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Integrations

Deepgram Supported
Facebook Supported
Microsoft Teams Supported
OpenAI Supported
Twitch Supported
Videolinq Supported
YouTube Supported
Zoom Supported
AutoSubtitles:
Claim AutoSubtitles and update features and information
Claim AutoSubtitles and update features and information
Line 21:
Claim Line 21 and update features and information
Claim Line 21 and update features and information