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Deku VS Underlayer

Compare Deku VS Underlayer and see what are their differences

Deku

Functional view library for building UI components as an alternative to React

Rating
0 reviews
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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
Promote on VibeVoted
Alternatives Is it good?
DisplaySwitcher
Switch your monitor’s video input and seamlessly transfer text and files! A Linux/macOS/Windows Desktop Application. 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?

Javascript UI Libraries popularity
100% vs 0%
alternatives listed
31 vs 2

Base details

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

Deku
Underlayer
Website github.com underlayerhq.com
Pricing —
Freemium $149 / Monthly Official pricing
Company — Startup from the United Arab Emirates · 1 - 9 employees · 2026
Listed in
Javascript UI Libraries JavaScript Framework JavaScript Developer Tools +1
Education E-learning Education / E-Learning

About Deku and Underlayer

In their own words, as submitted to SaaSHub.

Deku
Underlayer

No description of Deku 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.

Deku 5 features
Underlayer 0 features
  • Lightweight
    Deku is designed to be a lightweight alternative to other UI libraries, focusing on simplicity and performance by providing just the necessary features to build a component-based architecture.
  • Functional Components
    Deku emphasizes functional components over class-based ones, promoting a functional programming style that can lead to more predictable and testable code.
  • Virtual DOM
    Deku utilizes a Virtual DOM to efficiently manage and update the actual DOM, reducing the overhead of direct DOM manipulation and improving rendering performance.
  • State Management
    It handles state management internally in a minimalistic way, allowing developers to focus on the logic rather than the framework-specific state management patterns.
  • Minimal API
    The API of Deku is minimal and straightforward, which makes it easier to learn and integrate into projects compared to more complex frameworks.

Possible disadvantages

  • Smaller Community
    The size of Deku's user community is smaller compared to larger frameworks like React, which can result in fewer resources, community support, and third-party libraries.
  • Limited Features
    As a lightweight library, Deku comes with fewer built-in features, plugins, and tools, which might require developers to implement more custom solutions.
  • Less Frequent Updates
    Deku may not receive updates and new features as frequently as larger frameworks, potentially leading to concerns about long-term maintenance and security.
  • Not Mainstream
    Deku isn't as widely adopted in the industry, meaning there might be hesitancy in enterprise adoption due to its lack of mainstream status and potential risk factors.
  • Learning Curve for Reactive Paradigm
    Although Deku simplifies things with functional components, developers unfamiliar with a reactive programming paradigm might face a learning curve in transitioning from traditional UI development.

No features have been listed yet.

Videos

Walkthroughs and reviews on video.

Deku 3 videos + Add
Underlayer 1 video + Add

Amazing Yamaguchi Midoriya Deku My Hero Academia Kaiyodo Revoltech Action Figure Review

More videos

  • - Figma Izuku Midoriya / Deku My Hero Academia Unboxing & Review
  • - Unboxing: Revoltech Amazing Yamaguchi Izuku Midoriya Deku

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
Deku
Underlayer
100% 100%
Javascript UI Libraries
0% 0%
0% 0%
Education
100% 100%
100% 100%
JavaScript Framework
0% 0%
0% 0%
E-learning
100% 100%

Questions & Answers

As answered by people managing Deku 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

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