Meteor relies on developers writing server-side code. This is flexible, but it means you need to run your own servers -- meaning scaling, operations, etc are up to you. Scaling real-time / persistent connections is especially challenging.

Our rules are expression-based, so they have fast and predictable execution times, meaning we can run these on our own servers and scale your app for you with guaranteed performance.

Our rules also let you specify all of your security logic in one place, rather than sprinkling it around your code, meaning it's easier to review and reason about (and avoid holes).