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prism.js VS Underlayer

Compare prism.js VS Underlayer and see what are their differences

prism.js

Prism is a lightweight, extensible syntax highlighter, built with modern web standards in mind.

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?
Calcumber
Calculate in a notebook and share — from everyday math to engineering. 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, prism.js seems to be more popular. It has been mentioned 23 times since March 2021.

social mentions
23 vs 0
App Reviews popularity
100% vs 0%
alternatives listed
20 vs 2

Base details

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

prism.js
Underlayer
Website prismjs.com underlayerhq.com
Pricing
Open source
Freemium $149 / Monthly Official pricing
Company — Startup from the United Arab Emirates · 1 - 9 employees · 2026
Listed in
App Reviews Customer Feedback Marketing Tools Documentation +1
Education E-learning Education / E-Learning

About prism.js and Underlayer

In their own words, as submitted to SaaSHub.

prism.js
Underlayer

No description of prism.js 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.

prism.js 5 features
Underlayer 0 features
  • Lightweight
    Prism.js is designed to be a lightweight library, minimizing performance impact on the website. It is optimized for being small in size, which aids in faster loading times.
  • Easy to Use
    It is very easy to integrate Prism.js into any web project with minimal setup required. The instructions and implementation are straightforward, making it accessible for developers.
  • Theme Customization
    Prism.js supports custom themes, allowing developers to easily match syntax highlighting styles with the design of their website or application.
  • Extensible
    The library is modular with plugins and supports language extensions. This allows developers to add just the components they need, reducing bloat and improving performance.
  • Wide Language Support
    Prism.js supports a broad array of programming languages, making it versatile for projects that require syntax highlighting across multiple coding languages.

Possible disadvantages

  • Basic Functionality
    Prism.js focuses on simple syntax highlighting and doesn't include advanced features like IDE-level code analysis or linting, which some users might expect.
  • Limited Plugin Ecosystem
    While there are several plugins available, the ecosystem isn't as extensive as some other larger projects, which may limit customization for more advanced use cases.
  • Lacks Built-in Line Highlighting
    Some alternative libraries offer built-in advanced line highlighting features, which are not included out of the box in Prism.js, requiring additional customization.
  • No Built-in Live Code Editing
    Prism.js doesn’t support live code editing natively, which may be a limitation for users needing an interactive coding environment, such as in educational tools.
  • Supports Web Only
    Prism.js is optimized specifically for web use, which might be a limitation if you need syntax highlighting for different environments or formats, like desktop applications.

No features have been listed yet.

Videos

Walkthroughs and reviews on video.

prism.js 1 video + Add
Underlayer 1 video + Add

Prism.js - How to show html css javascript code syntax on your own website

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
prism.js
Underlayer
100% 100%
App Reviews
0% 0%
0% 0%
Education
100% 100%
100% 100%
Customer Feedback
0% 0%
0% 0%
E-learning
100% 100%

Questions & Answers

As answered by people managing prism.js 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 prism.js and Underlayer. For example, how are they different and which one is better?

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Social recommendations and mentions

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

prism.js 23 mentions
Underlayer 0 mentions
  • I finally rebuilt my portfolio website (and added a terminal theme)
    Blog content: .mdx files parsed with gray-matter and remark, with Prism syntax highlighting. - Source: dev.to / about 12 hours ago
  • Prism
    It reminded me of the code highlighter[0], and the ORM Prisma[1]. [0] https://prismjs.com/. - Source: Hacker News / 9 months ago
  • 1Password Breaks Syntax Highlighting On The Internet
    Starting sometime in early December of 2025, a change was rolled out to the 1Password browser extension that began injecting prism.js onto every site and targeting every block it encountered. - Source: dev.to / 10 months ago

View more

Tracking Underlayer since Sep 2026.

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