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Ray.so VS Underlayer

Compare Ray.so VS Underlayer and see what are their differences

Ray.so

Create beautiful images of your code

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, Ray.so seems to be more popular. It has been mentioned 35 times since March 2021.

social mentions
35 vs 0
Web App popularity
100% vs 0%
alternatives listed
150 vs 2

Base details

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

Ray.so
Underlayer
Website ray.so underlayerhq.com
Pricing
Open source
Freemium $149 / Monthly Official pricing
Company — Startup from the United Arab Emirates · 1 - 9 employees · 2026
Listed in
Web App Design Tools Developer Tools Productivity +1
Education E-learning Education / E-Learning

About Ray.so and Underlayer

In their own words, as submitted to SaaSHub.

Ray.so
Underlayer

No description of Ray.so 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.

Ray.so 5 features
Underlayer 0 features
  • User-Friendly Interface
    Ray.so offers an intuitive and easy-to-use interface that allows users to create beautiful code snippets quickly and efficiently.
  • Customization Options
    The platform provides various customization options such as background colors, themes, and paddings, enabling users to tailor their code snippet aesthetics to their preferences.
  • High-Quality Visuals
    Ray.so generates high-resolution images of code snippets which are particularly useful for presentations, social media, and documentation.
  • Support for Multiple Languages
    The tool supports a wide range of programming languages, making it versatile for developers working with different technologies.
  • No Sign-Up Required
    Users can generate and download code snippets without the need to sign up or log in, streamlining the process.

Possible disadvantages

  • Limited Advanced Features
    Ray.so focuses on simplicity and ease of use, which means it lacks some advanced features that power users might find essential, such as syntax checking or code execution.
  • No Collaboration Tools
    The platform does not offer real-time collaboration features, making it less suitable for team-based projects where multiple developers need to work on the same code snippet simultaneously.
  • Dependence on Internet Connection
    Since Ray.so is a web-based tool, it requires an internet connection to be used, which can be a limitation for users in areas with poor connectivity.
  • Performance Issues with Large Snippets
    The tool may experience performance issues or become less responsive when handling extremely large blocks of code.
  • Lack of Version Control Integration
    Ray.so does not integrate with version control systems like Git, which may be a drawback for developers who rely on these systems to manage their codebase.

No features have been listed yet.

Videos

Walkthroughs and reviews on video.

Ray.so 0 videos + Add
Underlayer 1 video + Add

No Ray.so videos yet. You could help us improve this page by suggesting one.

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
Ray.so
Underlayer
100% 100%
Web App
0% 0%
0% 0%
Education
100% 100%
100% 100%
Developer Tools
0% 0%
0% 0%
E-learning
100% 100%

Questions & Answers

As answered by people managing Ray.so 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 Ray.so 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.

Ray.so 35 mentions
Underlayer 0 mentions
  • CodePic: a private, offline code screenshot tool built with Svelte
    A plain textarea. Editing is a layered over the highlighted lines. It keeps your text exactly as you typed it, and it's deliberately not an IDE.
  • The stack. Svelte 5, TypeScript, Shiki for highlighting,...
    • - Source: dev.to / 19 days ago
  • Free Browser Tools for Developers Who Make Content
    I share code snippets on LinkedIn and Twitter fairly often. Plain screenshots get scrolled past. Ray.so takes the same code and wraps it in a clean dark card with syntax highlighting. The difference in engagement is measurable. Same... - Source: dev.to / 6 months ago
  • I asked Gemini for a prototype… and Snipsco happened!
    Then I tried the free classics - Ray.so and Carbon.now.sh. - Source: dev.to / 8 months ago

View more

Tracking Underlayer since Sep 2026.

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