When I was integrating this into Hacker News last night I was thinking: practically every web app is going to want this.

Paul Graham, YCombinator

switching my app from @boxcar to @notifo - it's just slicker and there are no ads to annoy my users.

James Harton, @jamesotron

A permission marketing channel in the pocket of your users? Yes, please.

[Notifo] solves a real, pressing need for many sites: maintaining user engagement after they're off your website. That is pure profit for the company, since you've already spent whatever form of resources it took to acquire them as a signup in the first place.

Patrick "patio11" McKenzie, MicroISV on a Shoestring

Notifo’s API makes it very, very simple for any site to insert a few lines of code in their site and offer Push Notifications very quickly. There is no approval process, you simply insert the code and you’re good to go; your site is now notification-ready.

What’s great about this solution is that it’s creating a way to get all the notifications in one place, rather than having to manage a dozen (or in my case, more) apps all with their own notifications. This way, when you load up the Notifo app, you get a stream of all the notifications you’ve chosen to subscribe to.

MG Siegler, TechCrunch