What are some alternatives?
When comparing Pushwoosh and PushOwl, you can also consider the following products
Airflow - Airflow is a platform to programmaticaly author, schedule and monitor data pipelines.
Pusher Push Notifications API - Send push notifications programmatically at scale
ifttt - IFTTT puts the internet to work for you. Create simple connections between the products you use every day.
PushCrew - Push Notifications for Websites
Pipefy - The new development platform built for agile teams.
PushPrime - Supercharge your website with push notifications