Pinnacle Launches:📱RCS (Next-Gen SMS) API for Developers

By
·
February 9, 2026

Pinnacle recently launched!

Launch YC: Pinnacle📱- RCS (Next-Gen SMS) API for developers
"The Rich Communication Services API for Developers"

Founded by Sean Roades & Ivan Zhang

Pinnacle is launching their API to send and receive RCS (Next-Gen SMS) text messages natively on user’s devices. They’re also launching an SDK for Python (`pip install rcs`). If you’re currently sending SMS, you should probably be using Pinnacle. Here’s a quick example of how they used their API to sell their Founder Mode hats (certified by Brian himself 😉)

Image Credits: Pinnacle


The problem

Short: SMS sucks.
Long: SMS messages have high friction from sending a message to checking out a customer. Interactivity is very limiting with SMS.

The solution

Short: RCS rocks.
Long: RCS messages reduce high friction for customers to buy products with a single tap and add interactivity through buttons, card carousels, and actions.

Why now

This hasn't been possible until now. Apple rolled out RCS this week on iOS 18. Carrier adoption has been fully supported on all Android devices just this year. Carrier adoption for iOS completes in a couple months. Pinnacle segments by device so you can adopt RCS incrementally.

Learn More

🌐 Visit www.trypinnacle.app to learn more.
⭐️ YC Companies - reach out to them here to join their private beta. You'll also get a free Founder Mode hat, 1000 messages / mo free, and their 24/7 #FounderMode support.

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