Option A
The market-leading customer engagement platform.
OneSignal provides push, in-app, email, and SMS messaging with generous free tier — widely used by indie mobile apps.
- Founded
- 2014
- Team
- 51-200
- Listing
- Free (nofollow)
- Listed
- May 2026
Option B
Adviserry Boards
ProMarketing
Adviserry Boards turns your subscriptions into a 24/7 personal board of advisors.
Adviserry Boards turns the newsletters, podcasts, and YouTube channels you already follow into a personal board of expert advisors that you can chat with anytime. Upload context about your projects and get help overcoming obstacles based on your favorite experts' actual content.
- Listing
- Pro (do-follow)
- Listed
- Mar 2026