Most founders drop out of college to chase their big idea. Nathaneo Johnson and Sean Hargrow didn't have to they raised $5.1 million in pre-seed funding before they even graduated.

The company they built is called Series. It is, in their own description, the first AI social platform built entirely on iMessage and it positions itself specifically as a professional network for Gen Z, doing for career connections what LinkedIn does for older professionals but through a medium the younger generation already lives inside.

The mechanics are elegantly simple. Users text a dedicated Series AI phone number on iMessage, explain who they are and who they want to meet. The AI replies with "shares" a carousel of up to ten profiles of other users seeking similar connections. Each profile appears as a card with a photo and a stated objective. Long-pressing a card opens a private conversation inside the same chat thread, without either party needing to exchange a real phone number. The entire interaction stays within iMessage.

Johnson, a computer science and economics major, met Hargrow, a neuroscience major, during their freshman year at the Yale Entrepreneurial Society, where they ran a podcast interviewing founders and CEOs. Through those conversations, they said they "realised the power of warm connections" the difference between a cold message to someone you've never met and an introduction through a trusted mutual. That insight became the thesis for Series: using AI to manufacture warmth at scale, serving as the intermediary that turns strangers into warm introductions.

They went through multiple product iterations in their freshman summer, incorporating a company around the thesis of AI-as-connection-facilitator. By March 2025 they were fundraising and building out a team of eight. The launch video that broke them through filmed by undergrads on no sleep was conceived at 1 a.m. and posted at 3 p.m. the following day. They met their first investor two days later.

The round closed on April 24, 2026 at $5.1 million, making it reportedly the largest pre-seed raised by Ivy League students. Investors include Pear VC, Venmo co-founder Iqram Magdon-Ismail, Reddit CEO Steve Huffman, and GPTZero founder Edward Tian a roster that spans consumer social, payments, and AI, and that collectively understands network effects better than almost anyone.

The early numbers are credible. Series is active on more than 750 college campuses and reports retaining more than 83% of active users a figure Johnson has publicly compared to Facebook's early-day retention, which is a high bar but not an implausible one for a platform where users are actively seeking connections rather than passively scrolling. In 2025 alone, more than 20,000 messages were sent within a single week.

The big strategic question isn't whether iMessage is a good place to build the case for meeting people where they already live is straightforward. It's whether Apple will continue to allow it. Apple has historically been selective about how third parties use iMessage infrastructure, and a social network that operates through a dedicated phone number occupies a grey area. Johnson and Hargrow have built something impressive on infrastructure they don't control. Navigating that dependency, as they scale from 750 campuses toward something larger, will be as important as the product itself.