Kinde VS Underlayer

Kinde's answer

Our primary audience is engineers, engineering managers, and CTOs for small business. We also have a large based of users in our free tier who use Kinde to help secure their side hustles and personal projects.

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.

Kinde's answer

Kinde was born from a frustration of having to reimplement core features every time a new project was dreamt up. Things like customer authentication, feature flags, and billing are needed by almost every SaaS startup at some point with a variety of cloud based and self hosted solutions out there. Kinde's founders got together to reinvent how software companies get started with the ambition to help accelerate their product idea into a reality as fast as possible. All of them have multiple stories of building things in the past and having to reimplement the same features over and over. Why can't there be an affordable option that works with engineers and their team to get them off the ground faster. This is Kinde.

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.

Kinde's answer

Kinde is offering a horizontal platform to solve fundamental features needed by almost every SaaS startup. Customer authentication, feature flags, and billing. While there are lots of players in the market who do each of those very well, none of them seamlessly work together without manually building in the integration. Kinde's platform is solving those problems under one roof as simply and elegantly as possible. We want your experience to be as painless as possible, which also means that our engineers regularly rotate through our support channels to make sure that your questions are answered as fast as possible by the experts who built the platform.

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.

Kinde's answer

Kinde has a large suite of support SDKs to integrate with our platform. See https://kinde.com/docs/. At the time of writing, this includes JavaScript, React, NextJS, PHP, Node, Apollo GraphQL, Express GraphQL, Node.js, .NET, React Native, Android, iOS, Ruby, Python, and Elixr. Feel free to reach out to our team if you have any questions on the SDKs or want to suggest another one to add.

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.

Underlayer's answer:

it's pre-launching

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.