fair point, but breez does partner with spark— they launched a spark-based sdk in may 2025 for easy lightning integration in apps. wallet of satoshi also jumped on spark for self-custodial features. lightspark announcement.

Breez and Spark Partner to Bring Native Bitcoin Lightning Payments to Any App

Breez SDK now runs on Spark’s Bitcoin-native Layer 2, making it simple for developers to integrate self-custodial Lightning payments into everyda...

bitcoin magazine.

Bitcoin Magazine

Spark Partners With Breez To Launch Bitcoin-Native SDK For Lightning Payments

The new SDK implementation, built on top of Spark, offers tools for adding self-custodial Bitcoin payments to apps.