Yes. Although it's worth noting that unlike email or text message subscribers, website push notification importing is a little more complex.
Given the way website push notifications work, your previous website push subscribers will fall into one of three categories:
Scenario #1: You supplied custom GCM/FCM keys to your push notification provider.
In this scenario, you created your own Google GCM/FCM project and provided the push provider with your credentials. This is the ideal scenario as it gives you full flexibility for importing/exporting subscribers. In order to import subscribers to Aimtell, simply email your push notification provider for an export of your subscribers and email us as firstname.lastname@example.org with this list. Once we've imported your list, you can add your GCM/FCM keys to your Aimtell dashboard and you'll be all set to go.
Scenario #2: You never supplied GCM/FCM keys, but your website push subscribers subscribed to yourwebsite.com (as opposed to yourwebsite.pushvendor.com)
In this case, we won't be able to directly import your subscribers - even if you asked for an export of them from your other vendor. That's because we don't have access to the GCM/FCM key that serves as a permissions key to send notifications to subscribers.
The good news is though, that since your subscribers subscribed directly to yourwebsite.com, they will be instantly added to your Aimtell account the next time they visit your website. Since they previously gave permission to your website to market to them, they will not need to go through the opt-in process again.
Scenario #3: You never supplied GCM/FCM keys, and your website push subscribers subscribed to yourwebsite.pushvendor.com (as opposed to yourwebsite.com)
Unfortunately, this scenario makes it nearly impossible to import subscribers. Not only do you not have the GCM/FCM key which is required to reach your subscribers, but they also technically never subscribed to your website. As such, you've fallen into a severe vendor lock-in and would have to start from scratch if you ever wanted to move vendors (ouch!)