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ShareX VS Underlayer

Compare ShareX VS Underlayer and see what are their differences

ShareX

ShareX is a free and open source program that lets you capture or record any area of your screen...

Rating
0 reviews
Pricing
Open source
Alternatives Is it good?
Underlayer

Build courses by API, drop them into your product with one iframe, and get told who finished. No portal, no learner accounts, priced per course view.

Rating
0 reviews
Pricing
Freemium $149 / Monthly
Alternatives Is it good?
FlexiQuiz
FlexiQuiz is a powerful online test generator that enables you to create engaging online quizzes, tests, or exams in minutes. Choose from 100's of features to create a customized quiz that meets your objectives for business, education, or fun. sponsored
Note: These products don't have any matching categories. If you think this is a mistake, please edit the details of one of the products and suggest appropriate categories.

Which is more popular?

Based on our record, ShareX seems to be more popular. It has been mentioned 274 times since March 2021.

social mentions
274 vs 0
Screenshots popularity
100% vs 0%
alternatives listed
240+ vs 2

Base details

Website, pricing, platforms and company facts side by side.

ShareX
Underlayer
Website getsharex.com underlayerhq.com
Pricing
Open source
Freemium $149 / Monthly Official pricing
Company — Startup from the United Arab Emirates · 1 - 9 employees · 2026
Listed in
Screenshots Screenshot Annotation Image Annotation Screen Capture File Uploads +2
Education E-learning Education / E-Learning

About ShareX and Underlayer

In their own words, as submitted to SaaSHub.

ShareX
Underlayer

No description of ShareX yet.

Underlayer is headless, API-first training for SaaS products. Instead of sending your users to a separate LMS portal, you generate a course, embed it where they already work, and get every completion sent back to your own systems. How it works Create a course. Generate one from a doc or a prompt...

Read more about Underlayer

Features and specs

What each product offers, as listed by its team.

ShareX 6 features
Underlayer 0 features
  • Free and Open Source
    ShareX is completely free and the source code is open to the public. This allows for community contributions, and users can trust that there are no hidden costs or malware.
  • Feature-Rich
    ShareX offers a wide range of features including screen capture, video recording, GIF creation, and various upload methods to many different services.
  • Customization
    The software provides extensive customization options, allowing users to tailor their workflows to their specific needs. This includes hotkeys, automated tasks, and image editing on-the-fly.
  • Various Output Formats
    Users can save their captures in multiple formats such as PNG, JPEG, GIF, and more. This makes it versatile for different use cases.
  • Automated Processes
    ShareX can automate various processes such as uploading to cloud services, copying URLs, and performing file operations. This enhances productivity and saves time.
  • Regular Updates
    The application receives regular updates, ensuring that it keeps up with new technology and user requirements.

Possible disadvantages

  • Complexity
    With its wide array of features, ShareX can be complex and overwhelming for new users. The interface might take some time to get used to.
  • Windows-Only
    ShareX is only available for Windows. Users on other operating systems like macOS or Linux will not be able to use it natively.
  • Occasional Bugs
    Some users report occasional bugs or instability, which may require troubleshooting or waiting for updates to resolve.
  • Steep Learning Curve
    Due to its extensive features and customization options, there is a steep learning curve for users who want to make the most out of all functionalities.
  • Third-Party Dependencies
    Some features may rely on third-party services or frameworks, which can lead to complications or additional configuration steps.

No features have been listed yet.

Analysis

An editorial look at what each product does well and who it suits.

ShareX
Underlayer

Overall verdict

  • ShareX is a robust and versatile tool for anyone in need of an advanced screen capture and file-sharing software. Its open-source nature and no-cost usage make it an attractive choice for casual users and professionals alike. With a little time spent on exploring its features, users can unlock a powerful toolset that can greatly enhance productivity.

Why this product is good

  • ShareX is considered good by many due to its extensive range of features for screen capturing, file sharing, and productivity. It is an open-source tool, which means it's free to use and has a strong community of contributors who constantly update and improve the software. The application supports multiple capture methods, including full screen, active window, or specific region. It also provides editing tools, annotations, and supports various file formats. Additionally, ShareX offers seamless integration with many cloud storage and file-sharing services, allowing for easy sharing and storage of captures.

Recommended for

  • Tech enthusiasts who appreciate open-source software.
  • Content creators who need extensive screen capturing and editing capabilities.
  • Professionals who require quick sharing of visual content with clients or teams.
  • Educators and trainers creating instructional content.
  • Remote workers who frequently share screenshots or screen recordings with colleagues.

No analysis of Underlayer yet.

Videos

Walkthroughs and reviews on video.

ShareX 3 videos + Add
Underlayer 1 video + Add

Here's why you should download ShareX.

More videos

  • - Simple Screenshots & Screen Recording — Why You Should Use ShareX
  • - ShareX Install and How to use Guide 2019

Underlayer demo

Category popularity

How often each product is chosen within a category, 0–100% relative to the other.

Score bands 0–20 21–40 41–50 51–60 61–100
ShareX
Underlayer
100% 100%
Screenshots
0% 0%
0% 0%
Education
100% 100%
100% 100%
Screenshot Annotation
0% 0%
0% 0%
E-learning
100% 100%

Questions & Answers

As answered by people managing ShareX and Underlayer.

Who are some of the biggest customers of your product?

Underlayer's answer:

it's pre-launching

What makes your product unique?

Underlayer's answer:

Underlayer is training with no portal. You build a course by API, by MCP, or in the visual builder, and add it to your product with one iframe. Then signed webhooks tell your systems who finished. Learners never create an account or leave your app, and the player uses your theme, so it looks like part of your product. We charge per course view, not per seat, and every price and overage rate is published.

Why should a person choose your product over its competitors?

Underlayer's answer:

Most course tools, like Coassemble, Trainn and LearningStudioAI, assume training happens on their own site: learners sign up, log in and get enrolled, and you pay per seat. Underlayer takes the opposite approach:

No learner accounts. You pass in your own user IDs and we track progress against them. Built for developers. A full REST API covers every resource, and an MCP server lets AI agents create and edit courses. Results in your own tools. Signed webhooks send completions to your CRM, your product or your data warehouse. SCORM 1.2 and 2004 export for customers who still need to load courses into an LMS. Public pricing. Plans start at $149/month for 25,000 course views, with unlimited learners and no sales call required.

How would you describe the primary audience of your product?

Underlayer's answer:

SaaS product, customer success and engineering teams who want onboarding, product education or compliance training inside their own app. It also suits platforms that train other people's users, like partner networks, marketplaces and field-ops tools, where a separate LMS login gets in the way.

What's the story behind your product?

Underlayer's answer:

Every company putting training in front of its users hit the same wall: the LMS wanted to own the learner. That meant a separate portal, a second login and a per-seat bill for people who never opened a course. We built Underlayer as the layer underneath instead. You keep the product and the user relationship. We handle building the course, playing it and tracking progress, and we stay out of the way.

Which are the primary technologies used for building your product?

Underlayer's answer:

Next.js 16 (App Router) with React 19 and TypeScript, Tailwind CSS v4, and Supabase (Postgres with row-level security, Auth and Storage). Claude from Anthropic generates courses with AI. Stripe handles billing and Resend sends email. There is also a remote MCP server with OAuth 2.1 for AI-agent access.

User comments

Share your experience with using ShareX and Underlayer. For example, how are they different and which one is better?

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Reviews and articles

External articles and on-site reviews we used to compare the two products.

ShareX no reviews yet
Underlayer no reviews yet

View more

We have no reviews of Underlayer yet. Be the first one to post

Social recommendations and mentions

Recommendations tracked on public social media and blogs since March 2021.

ShareX 274 mentions
Underlayer 0 mentions

View more

Tracking Underlayer since Sep 2026.

Alternatives to ShareX and Underlayer

When comparing ShareX and Underlayer, you can also consider the following products.

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