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Kuzzle VS Underlayer

Compare Kuzzle VS Underlayer and see what are their differences

Kuzzle

Free and open source backend as a service on-premises for IoT and mobile apps with advanced functionalities: real-time pub/sub, fast search and geofencing

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?
PromptBrake
Automated AI security testing for agents, chatbots, and APIs. Find prompt injection, data leaks, and unsafe behavior before launch. 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, Kuzzle seems to be more popular. It has been mentioned 2 times since March 2021.

social mentions
2 vs 0
Developer Tools popularity
100% vs 0%
alternatives listed
55 vs 2

Base details

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

Kuzzle
Underlayer
Website kuzzle.io underlayerhq.com
Pricing
Open source Official pricing
Freemium $149 / Monthly Official pricing
Company — Startup from the United Arab Emirates · 1 - 9 employees · 2026
Listed in
Developer Tools App Development Backend As A Service Realtime Backend / API Mobile Push Messaging Parse Server +3
Education E-learning Education / E-Learning

About Kuzzle and Underlayer

In their own words, as submitted to SaaSHub.

Kuzzle
Underlayer

No description of Kuzzle 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.

Kuzzle 6 features
Underlayer 0 features
  • Real-time capabilities
    Kuzzle offers real-time data processing, allowing developers to create applications that update instantly as data changes, improving user experience and responsiveness.
  • Scalability
    Built to handle large amounts of data and users simultaneously, Kuzzle is designed to scale efficiently, providing optimal performance as demand grows.
  • Open-source
    Being open-source, Kuzzle offers transparency and the ability for developers to contribute to its development and customize it to fit their specific needs.
  • Flexible plugin system
    The platform supports a robust plugin system, allowing users to extend its functionalities to meet specific project requirements without altering the core system.
  • Supports multiple protocols
    Kuzzle supports various communication protocols such as HTTP, WebSockets, and MQTT, providing versatility in how data can be transmitted and accessed.
  • Rapid development
    With an array of built-in features and tools, Kuzzle enables faster development cycles, letting developers focus more on application logic rather than backend setup.

Possible disadvantages

  • Learning curve
    New users might encounter a steep learning curve due to the comprehensive features and functionalities that entail understanding the system deeply.
  • Community support
    While Kuzzle is open-source, its community is smaller compared to more established technologies, which might limit resources for troubleshooting and shared solutions.
  • Resource-intensive
    The platform may require significant resources, particularly when managing extensive real-time data processing, potentially increasing hosting costs.
  • Specialized use cases
    Kuzzle might be overly complex for simple applications that do not require real-time capabilities or extensive scalability, making it less suitable for smaller projects.
  • Dependency on architecture
    Projects that are too tightly integrated with Kuzzle may face issues if future requirements necessitate migrating to a different architecture or platform.

No features have been listed yet.

Videos

Walkthroughs and reviews on video.

Kuzzle 3 videos + Add
Underlayer 1 video + Add

Kuzzle Demo - Smart Home

More videos

  • - [Tuto] Geofencing advertising with Kuzzle - Geofencing
  • - Kuzzle: a backend to power modern apps for web, mobile & IoT

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
Kuzzle
Underlayer
100% 100%
Developer Tools
0% 0%
0% 0%
Education
100% 100%
100% 100%
Backend As A Service
0% 0%
0% 0%
E-learning
100% 100%

Questions & Answers

As answered by people managing Kuzzle 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 Kuzzle 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.

Kuzzle 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.

Kuzzle 2 mentions
Underlayer 0 mentions
  • Looking for an IOT Platform (Realtime, low latency)
    You can try https://kuzzle.io/, the platform is a highly scalable Node.js application and include it's own realtime engine in C++. Source: about 4 years ago
  • Do you use Firebase for your flutter apps?
    Also I recommend you to use foreign-key database structure, instead of documents. To my opinion it suits better to Parse Server. If you wanna use documents, you could try kuzzle also good solution! Source: over 5 years ago

Tracking Underlayer since Sep 2026.

Alternatives to Kuzzle and Underlayer

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

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