PubNub is a real-time infrastructure platform (pub/sub messaging, presence, chat, IoT) that bridges to APNs and FCM for mobile push as one feature among many, priced by Monthly Active Users. Pushbrain is push-only and routes delivery through your own Firebase project, free at any volume. Here is how they compare for teams that specifically need push.
Not primarily. PubNub is a real-time infrastructure platform built for pub/sub messaging, presence, chat, and IoT data streams. Mobile push (via APNs and FCM bridging) is one feature layered on top of that platform, not the core product. Pushbrain is push-only: every part of the product — scheduling, AI copy, A/B testing, audience health — is built specifically around Firebase push.
PubNub prices by Monthly Active Users (MAU): the free plan covers up to 200 MAU and 1M push notifications a month, but the next tier is a $98/month Starter plan once you outgrow it. Pushbrain uses flat monthly pricing starting at $10/month regardless of MAU, with FCM delivery itself always free since it runs through your own Firebase project.
If you already need real-time pub/sub messaging, presence, or chat infrastructure and want push notifications bridged into that same platform, PubNub consolidates those needs into one vendor. Pushbrain does not do pub/sub messaging, presence, or chat — it is narrowly scoped to push.
If push is the only real-time feature you need, PubNub's MAU-based pricing means cost climbs with audience size even though push notifications themselves route through free APNs/FCM infrastructure either way. Pushbrain keeps delivery on your own Firebase project at flat monthly cost, and adds AI-generated notification copy and statistically significant A/B testing that PubNub does not offer as a push-specific feature.
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