IIRC (from my time there) Stripe still uses MongoDB for it's main datastore.

https://stripe.dev/blog/how-stripes-document-databases-suppo...

We can only guess what products you use, but I'll take a stab by naming some big ones:

Spotify - https://techcrunch.com/2026/02/12/spotify-says-its-best-deve...

Netflix - https://www.cnbc.com/2025/10/22/netflix-all-in-on-leveraging...

Stripe - https://stripe.dev/blog/minions-stripes-one-shot-end-to-end-...

Discord - https://discord.com/blog/developing-rapidly-with-generative-...