Push / In-app Messaging SDK
The clearest split is that Novu has a free tier while Braze does not. Braze is Customer engagement platform with push, in-app messages, email, SMS, WhatsApp, and Canvas journey orchestration; Novu is Open-source notification infrastructure with multi-channel support, in-app feed, user preferences, and self-hostable backend. The data points Braze at mobile app engagement and user lifecycle messaging, and Novu at mobile app engagement and user lifecycle messaging. Pricing: Braze is subscription from $10; Novu is freemium, free tier. Lock-in is high for Braze and low for Novu, with DX at 5/5 vs 5/5 and transparency at 1/5 vs 5/5. On listed strengths, Braze emphasises mobile app engagement and user lifecycle messaging, and Novu emphasises mobile app engagement and user lifecycle messaging. Both offer an enterprise tier for larger rollouts. Honest trade-off: neither fits web-only products without mobile, so if that is your context, look elsewhere; otherwise pick on the pivotal factor above and the DX score that matters most to your team.
Quick take
Braze is for mobile; Novu is for mobile; decide based on whether a free tier matters.