What does a frontend-only saas company look like?

Hi folks.

I have an idea bouncing around in my head and I need some guidance.

I’m wondering if there are examples of frontend only saas companies and what that business model looks like.

The idea is the customer brings their own backend and uses a service to visualise that data.

The customer adds a query string to the front end service url which fetches the data and presents it through the front end service.

Is there a name for this category of saas? Do you have any suggestion of existing companies I could look at? Have you tried this before and have any insights? Is this really obvious and I’m over-thinking it?

I’m currently developing a web app that stores 3D assets that users upload for review. This requires me to maintain the backend infrastructure to store and manage these assets and metadata associated with them.

Most of my potential customers already have a well established asset managent system. Instead of copying that data from their db to mine, why not grab it directly from their db? This could also help with security since the customer is responsible for exposing that data.

Looking forward to any and all suggestions!