Catch every accessibility issue - effortlessly.The AI Agent for teams that can’t risk accessibility issues slipping through
Our AI Accessibility Agent scans pre-recorded media frame by frame, detecting accessibility issues and delivering an actionable report on what needs fixing—so teams can focus on what matters without getting stuck in manual checks. Increase productivity, streamline compliance, and ensure nothing is missed.
Trusted by thousands of customers, from agencies to enterprises
Our Product
Your AI-Powered Partner for Smarter Accessibility
Automatically checks, detects, and reports accessibility issues—eliminating guesswork and reducing manual effort
AI Agent Accessibility Check
Automatically scans every file for poor colour contrast, flashing content, missing captions, audio descriptions, background noise, and more.
Compliance Report
Get a clear, frame-by-frame report showing every issue the agent finds. See exactly what needs fixing and what’s already compliant.
Accessibility Dashboard
See a clear dashboard overview of every uploaded file and whether it meets WCAG standards and is compliant. See what needs to be fixed and how accessibility improves as changes are made.
Timeline View
See what’s compliant and what needs fixing in a timeline view. Click directly to resolve issues and make adjustments.
WCAG 2.1
EN 301 549
EAA
ADA
ACA
What Subly Checks
Detecting Accessibility Issues — Frame by Frame
Manual checks rely on the human eye, prone to errors and missed issues, and video platforms can’t fix everything. Subly identifies and highlights accessibility issues that need fixing.
Open Captions
Checks for open captions (burned-in captions), analyses contrast ratio (minimum 4.5:1 for AA compliance), and verifies readability based on CPS (characters per second) and CPL (characters per line).
On-Screen Text
Analyses all on-screen, embedded text that is not captions to check contrast and readability.
Colour Contrast & Readability
Analyses caption font colour against its background for readability and caption background against the video to ensure sufficient contrast for accessibility.
Flashing Content
Detects unsafe, rapid, and strobing flashing sequences, ensuring flash rates stay below 3 per second to prevent seizure risks.
Closed Captions
Detects all subtitle files linked to the video, such as SRT and VTT, ensuring they meet CPS/CPL readability standards. Analyses contrast and styling requirements if controlled by the video player.
WCAG Compliance
Analyses key accessibility factors based on WCAG 2.1 (and 2.2 where applicable) to determine if your video meets A, AA, or AAA compliance standards.
CPS & CPL
(Characters Per Second and Per Line)
Verifies caption readability by measuring CPS and CPL, ensuring each file meets readability standards.
Text Clarity & Vocabulary Complexity
(Coming Soon)
Checks sentence readability, flags complex words and jargon, suggests clearer alternatives, and ensures accessibility by analysing structure and vocabulary.
Trusted by Teams, Everywhere
Why Teams Trust Subly
Subly’s platform works alongside your existing processes to enhance, not replace, manual efforts.
AI That Supports, Not Replaces, Your Accessibility Strategy
Teams are cautious about AI-driven checks, which is why our AI agent works alongside your workflows - reducing errors, enhancing manual checks, and scaling accessibility without disruption.
From Guidelines to Practical Implementation
Setting accessibility guidelines is one thing - applying them across videos, webinars, and social content is another. Our AI agent detects issues, suggests fixes, and documents accessibility to make compliance easier.
Manual Checks Miss More Than You Think
Manual checks are prone to errors and inconsistency. Our AI agent automates detection, ensures nothing is overlooked, and provides clear, actionable reports - without adding extra workload.
Responsible AI – A Promise to Never Sell Your Data
Don’t compromise on security. We do not and will not sell your content or data or use it for advertising. You trust us to handle your information with care, and we honour that. Our business runs on subscriptions - not on selling your content.
Effortless Accessibility, Designed for Every Team
Whether you want to identify accessibility gaps, remove unnecessary tasks and guesswork, or ensure content meets legal standards, Subly gives you the tools to stay ahead—without the complexity.
For Your Entire Organisation
From marketing teams checking videos before release to customer demos and training content, Subly makes accessibility simple for everyone—easy to use, no complexity, no friction. A central dashboard keeps your accessibility team informed, while IT teams benefit from a single, scalable tool that works across the entire organisation.
For Agencies: Add More Value for Clients
Clients rely on you to deliver high-quality, compliant content. As accessibility regulations evolve, they’ll expect you to ensure their media meets legal standards. With Subly, you can provide clear, automated reports—turning compliance into an added-value service.
For Accessibility Consultants: Automate What You Already Do
You’re already helping businesses stay compliant, but manual checks take time. Subly automates repetitive tasks, so you can focus on strategic accessibility improvements while delivering faster, more consistent results for your clients.
Subly for Enterprise
Proof in the Numbers
Faster Checks, Lower Costs, and Smarter Workflows
Subly works alongside teams to speed up reviews, cut costs, and reduce manual effort. By handling multiple videos at once, it removes bottlenecks and increases efficiency—allowing teams to focus on higher-value work.
2.5
x
Faster than a human check and report,
eliminating back-and-forth reviews and
automating tedious tasks.
00
%
Lower costs than manual checks—at least
3.5x more affordable than doing it manually,
reducing operational expenses.
000
%
Completely free reports that highlight what
needs improvement, making it cheaper than
paying someone in your team to do the same
task.
Upload or Connect
Upload directly, connect via integrations, paste a URL, or import from editing tools like Veed, Adobe, or wherever your media lives.
AI Agent Checks & Reports
The AI agent scans your file and gives you a clear report showing every accessibility issue — and exactly which frame it appears in.
Choose Your Fixes
See what needs fixing, select the fixes you want — captions, transcripts, translations, colour contrast, trigger warnings — and the AI handles it automatically.
Review & Final Touches
Give it a final check, make any edits, collaborate with your team, or bring in human experts for extra help.
Subtitling is critical for us to make sure we’re serving our Deaf and Hard of Hearing communities, as well as other audiences who require that support. Our creative team and our filmmakers found Subly really easy and quick to use. It's been crucial in streamlining our whole content process.
London Film Academy
Subly's translations have ensured that our message is accessible to a broader demographic, regardless of language barriers. This powerful tool has not only saved us time and resources but has also amplified our ability to connect with audiences worldwide.
FIDIC Academy
Their AI-powered tools have significantly improved our content accessibility and reach. We've drastically reduced production time, resources, and manual efforts. We've expanded global engagement and can now connect with a diverse, international audience.
TBN UK
Bring Subly into your flow of work
Directly integrate, upload via URL or CSV, or pull from any platform your team uses. Any pre-recorded media is supported.
Subly’s API
Bring accessibility into your own platform — check, fix, and make media accessible using Subly’s API, all without leaving your existing workflow.
Learn more
Microsoft Integration
Easily transcribe, caption, summarise, and translate videos, webinars, and meetings in OneDrive and SharePoint — all with one click, without ever leaving Microsoft.
Learn more
Upload From Anywhere
Sync directly from Zoom or upload your final video using a URL link — from YouTube, Vimeo, Veed, Adobe, or wherever your team works.
Learn more
Legal Disclaimer:
This product is designed to support media accessibility; however, it should not be relied upon as a sole or definitive means of compliance with accessibility laws. The responsibility for ensuring full accessibility and legal compliance remains with the content owner. This product does not guarantee legal sufficiency and should not be considered a substitute for professional legal advice. It is not admissible as conclusive evidence in a court of law.
FAQ
Frequently Asked Questions
We've got answers! Browse through our FAQ section to find quick solutions and detailed explanations to some of the most common queries. Whether you're just getting started or need specific guidance, our comprehensive FAQs are here to assist you every step of the way.
Getting Started
How can I start using the AI Accessibility Agent?
This is a paid feature available on Subly’s Business or Enterprise plans. You can upgrade in the platform or contact our team for more details.
Do you offer a free trial?
You can sign up here for a free trial of the platform and receive a sample report. However, the AI Accessibility Agent is not free, as it requires significant processing power. The sample report gives you an idea of what to expect.
Standards & Compliance
What accessibility standards do you assess against?
We follow WCAG 2.1 guidelines and, in some cases, WCAG 2.2. This ensures content is perceivable, operable, understandable, and robust for all users, including those with disabilities.
Why do you use WCAG for assessments?
WCAG guidelines form the basis for accessibility laws, directives, and regulations, including:
ADA (Americans with Disabilities Act, USA) – Law
ACA (Accessible Canada Act, Canada) – Law
EAA (European Accessibility Act, EU) – Directive
UK Equality Act 2010 – Law
DDA (Disability Discrimination Act, Australia) – Law
RGAA (Référentiel Général d’Amélioration de l’Accessibilité, France) – Regulation
BITV 2.0 (Germany) – Law
And more, as WCAG continues to influence global accessibility requirements.
What does the EAA require?
The EAA does not explicitly mandate WCAG 2.1 compliance, but aligning with EN 301 549—which incorporates WCAG 2.1 Level AA—is widely accepted as the best approach. Most EU member states are implementing EN 301 549, ensuring compliance reduces the risk of penalties and lightens the workload for accessibility and compliance teams.
Language & Media Compatibility
How many languages can you detect in a media file?
We assess the primary language spoken in the file. If other languages are detected, they will be highlighted in the report but not assessed.
Which languages do you support?
Here are the languages Subly supports.
Do you support live video and audio?
No, we only support pre-recorded media, including marketing, ads, social media, webinars, demos, and training content.
What media formats do you accept?
Video: .mp4, .mov
Audio: .mp3, .m4a, .oga
You can also upload an audio file, add an image, and convert it into a .mp4 file. If your format isn’t supported, you can use a free third-party converter or contact support to request additional formats.
What do you check for?
Here is what we check for in video or audio files. If you need more details or want to request additional formats, contact support team.
Pricing & Comparison
What is the cost of Subly?
Subly operates on a credit-based subscription system, where the AI Accessibility Agent deducts credits based on file length. The cost is $6.99 per minute (in credits), and a subscription is required to access this feature.
You can see our plans here.
How does Subly compare to the cost of a manual accessibility check?
Subly is at least 3.5x more cost-effective and significantly faster than manual checks, making accessibility compliance easier and more scalable.
Why is it better to use Subly vs. an internal team?
Manual checks are resource-heavy, can miss details the human eye might overlook, and can only process one video at a time—creating costly bottlenecks. Subly is 2.5x faster, fully scalable, and delivers consistent, accurate results without adding to your team’s workload. By automating accessibility reviews, your team can focus on creating, refining, and distributing content while ensuring compliance with ease.
