Is there space for a Web Push Notification Service?

Last year, my brother and I were working on a mobile multiplayer game (we make games for a living), and we needed some Push Backend to handle individual notifications to our users. None of the services already in the market was right for us; they were either bloated with features we didn't need, had too complex pricing schemes, or offered false free tiers worse than having nothing. We just needed a simple & affordable backend to handle notifications, that's all. So we built it, and It's been working great for a few months already, with 500K+ users. yay!

Back to the future, at the beginning of January, I wondered: why not packing our own Push Notification Service into a new project, so we can release it? Maybe there are others in the need of a Push Backend that don't want to engage on freemium tiers, but can't afford an enterprise subscription. And so I started building Singlewave.io.

After 3+ weeks of work on top of what we had, MVP is ready!
Even though it's not ready for mobile push notifications yet (I have yet to work on iOS & Android Plugins), it can fully handle Web Push Notifications. You can get them on your web, no-coding involved, in less than 5 minutes.

Since this is something I already had in the making, I didn't want to validate the idea until I had something to offer. Now that we have it, I would love to know what do you think about this.

Those in the need of sending push notifications (either web or mobile), would you be interested on giving Singlewave a try? Is there space for a service like this, made by and for IndieHackers?