Some teams start by integrating Apple PassKit and the Google Wallet API directly. That path can make sense when wallet passes are a small part of a larger product and you already maintain signing certificates, hosting, and update pipelines.
A wallet pass SaaS typically handles signing, distribution, updates, notifications, and operational tooling so product teams can focus on the program rather than wallet infrastructure. The right choice depends on team capacity, timeline, and how many pass types you need to run in production.