Introducing RPLY: The First AI built for iMessage

Today, NOX announces the beta release of RPLY, a revolutionary iMessage assistant for macOS and iOS designed to ensure no message goes unanswered. Built to work natively within Apple’s ecosystem—no additional installations required—RPLY intelligently drafts responses, adapting to each user’s unique style. With a waitlist surpassing 250,000 users, RPLY’s subscription model underscores its role as an indispensable tool for modern communication.

The Challenge: A High-Stakes Inbox

iMessage has become the backbone of personal and professional communication, yet the friction of keeping up with conversations often leads to missed connections. “My inbox might show 100 unread emails—but it’s the five unread texts that keep me up at night,” says an early RPLY tester. Until now, managing messages has been a reactive, manual process.

AI That Works Where You Are

RPLY brings ambient intelligence to iMessage, offering AI-generated replies that feel natural and contextually aware. Users can choose between a local Llama-based model for privacy or a cloud-based GPT option. Responses appear natively within iMessage, ready to be sent or edited, and if a message remains unanswered for 24 hours, RPLY ensures a response is delivered—eliminating the unintended silence that strains relationships. “We set out to build an assistant that doesn’t require new habits or extra effort. RPLY fits into your existing workflow, anticipating what you’d say and setting it there to wait for your approval,” says the founder of NOX, Molly Cantillon.

The Vision: AI as a Seamless Extension of You

The NOX team—born out of Stanford—has long pursued AI that enhances human potential with minimal friction. RPLY is just the beginning: by embedding intelligence directly into the most fundamental layer of digital interaction—messaging—NOX is paving the way for AI that intuitively manages every aspect of modern communication.

The Roadmap

“iMessage is the new email. Read my inbox, and you’ll gather some context about me. But read my texts, and you’ll know everything.”

Messages drive high-stakes decisions—billion-dollar deals, life-changing introductions, and critical relationships all unfold inside iMessage. RPLY is at the perfect intersection, embedding itself into these intimate exchanges. Every interaction fuels a compounding loop: receive, predict, optimize, repeat.

But the true vision goes beyond messaging. By positioning itself inside the highest-value conversations, RPLY is laying the groundwork for a broader intelligence layer that anticipates needs, automates workflows, and ultimately redefines digital interaction.

Try now at: http://heynox.com/rply/download

About NOX

Founded by Stanford student Molly Cantillon, NOX is the first AI assistant that makes you a better version of yourself. She dropped out of school in late 2023 to develop NOX into the best copilot with unlimited memory of past conversations, deep integrations with your favorite apps, and a world class prediction engine. The company is backed by OpenAI, and leading angel investors from Ramp, Google, and Instagram. Learn more at https://heynox.com/

Contact Information

Riley Munks

PR Advisor

Activate PR

riley@activate-pr.com