The platform is built on top of Playwright running on a low cost Hetzner instance, and can scale up and down as required, either horizontally or vertically. It's also possible to run the service on-prem if anyone requires.
You can use this service for several use cases, such as:
Link previews, QA testing of deployments (I use it for that myself), checking which part of your site is "under the fold", etc
It's not a unique service, but I'm building a few features on it in the upcoming weeks which will hopefully make this platform a bit more unique. I would love to hear feedback, and I've setup a dev blog at https://allscreenshots.dev where I build in public and talk about the choices I've made, what works well, and what doesn't. I will provide updates every day on the dev log for the next 30 days on this project.
I've built 8 SDKs and sample apps so far (did I mention Rust? Or PHP?) to make it even easier to use the API (I haven't published the SDKs yet, I just built them today) , feel free to check them out here: https://github.com/allscreenshots/allscreenshots.com/