2 Yale students raised $5 million for their social network that lives in iMessage. Read their pitch deck.

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Nathaneo Johnson and Sean Hargrow

Nathaneo Johnson and Sean Hargrow cofounded Series. Series
  • Series, a networking app focused on Gen Z, lives fully in iMessage.
  • Founded by Yale students Nathaneo Johnson and Sean Hargrow, the startup raised $5.1 million.
  • Read the pitch deck Series is sharing with investors as it raises its new funding round.

Once a day, I get a text message with 10 photos of random people looking for jobs, professional connections, or, on occasion, a new friend or date.

It's not LinkedIn or Tinder texting me. It's Series, a social networking startup that sends potential connections straight to its users' iMessage inbox.

"The whole goal of Series was to build a professional network where Gen Z lives, which is in their messages," Series CEO Nathaneo Johnson told Business Insider.

Building a social network layer on top of iMessage allows users to feel the "intimacy of having someone's phone number," but with a bit more privacy, he added.

If you want, you can share your direct contact info with someone you meet through Series. But the default is for you to reply to other users via Series' messaging service. That service lives within a single iMessage conversation, with distinct threads for replying to different people (and to the platform's AI chatbot).

The startup, cofounded by Yale students Johnson and Sean Hargrow, both 22, raised $3.1 million last March and recently announced it has closed another $2 million in funding. That brings the company's total pre-seed financing to $5.1 million.

Its investors include Venmo cofounder Iqram Magdon-Ismail, Reddit CEO Steve Huffman, and venture capital firms such as Uncommon Projects, Pear VC, and Parable Ventures.

The startup is also looking to raise additional capital, Johnson said. Series is targeting an 8-figure seed round.

The team is looking to further scale its platform and hire engineering talent with its targeted seed funding, Johnson added. Its pre-seed funding was used to hire its initial team — eight people — and bring the product to market.

Series deployed marketing stunts in the past year to grow its platform, including "hiring" a robot to accompany the founders as they pitched the platform to college students, filming a reality-TV-style series, and hopping on the trend of viral launch videos to stir buzz.

The top goal for Series, now, is "making sure we continue to grow the network as dense and as fast as we can," Johnson said.

A new way to network for the AI era

While people can use Series to find love or camaraderie, its main use case is young professionals seeking networking opportunities.

Johnson said the startup first branded itself as an "AI social network, which essentially is still true."

"But we realized we need to relatively niche down in the type of connections we were making," he continued, which meant doubling down on professional connections in its marketing and product development.

Series is one of several AI startups, including Gigi and Boardy, taking on LinkedIn by pitching that they can help people network better and faster.

If Series recommends someone who stands out, users can hold down on the photo and react like they would any iMessage content: using an emoji or directly replying. Users can also prompt the Series bot with what type of people they're looking for, such as startup founders or investors. The platform uses a third-party service that lets Series send and receive iMessages. Android users can sign up for Series, but Johnson said the experience is more limited via SMS text messages.

Series users no longer need a college email address to sign up.

As for monetizing, the service is free for now, and Series is considering enterprise options, such as offering its network as a hiring resource to companies or agencies.

Read the pitch deck Series is sharing with investors as it raises its seed round:

Note: Some slides and figures have been redacted.

Series dubs itself the 'professional network for Gen Z'

Find your people on iMessage
                                      
                                      Series
                                      
                                      The Professional Network for GenZ © 2025

Series

It starts the deck explaining how AI is a technological shift

our thesis
                                      
                                      Apple launched the App Store in 2008
                                      Creating an interface used by 650M people every week
                                      
                                      In 2022, OpenAI released ChatGPT
                                      
                                      Making conversation the interface for 1B people

Series

It then outlines a problem: People don't always respond to DMs

22 PM]
                                      [Message]

Series

It introduces Series as a network that is 'entirely on iMessage'

our solution
                                      
                                      Series - the first professional
                                      network built the way GenZ
                                      communicates
                                      
                                      enitrely on iMessage

Series

Then, it explains how the app works — using iMessage styling

how does Series work?
                                      
                                      on Series cold DMs don't exist
                                      
                                      you create something
                                      called a "share" instead
                                      
                                      very similar to a DM except
                                      Series will share it to the
                                      right people
                                      
                                      Users receive a personalized set
                                      of shares in a carousel
                                      
                                      They swipe through, see who's
                                      interesting . . . and can reply to
                                      someone's share to start a
                                      conversation

Series

Series then introduces its 8-person team

So who's behind it all?
                                      
                                      We're a team of 8
                                      
                                      Avg age is 23 and 65% of our
                                      team writes code
                                      
                                      Team has prev. been at Meta,
                                      Microsoft, Salesforce,
                                      Raytheon, Apple etc ...
                                      
                                      but the biggest thing . . . is
                                      most of us are still in school
                                      
                                      We are the exact demographic
                                      we're building for
                                      
                                      our Team

Series

It also includes retention data points

how do you know this is
                                      working?
                                      
                                      79% of our users (people who never even
                                      post) are back on Series within 7 days.
                                      Even 61% come back by day 30.
                                      
                                      This is the top 5% of consumer social retention
                                      (given a16z's benchmark) . . . but we'd actually
                                      argue LinkedIn is the closer comparison.
                                      
                                      You don't need a professional connection everyday.
                                      
                                      Then again, we've also had over 4M
                                      messages exchanged on Series so far
                                      
                                      fair, so then what does an active user
                                      look like?
                                      
                                      Of those who come back, active means
                                      your making professional connections
                                      (replying to other users)
                                      
                                      62% of users who make their first connection
                                      end up coming back to make more . . .
                                      
                                      And if someone makes a connection
                                      by D4, 82% of them are coming
                                      back by D30
                                      
                                      nice, and at what scale?
                                      
                                      we built a user base of high conviction to make
                                      sure we can scale this network effectively.
                                      
                                      95% of our users are entrepreneurs
                                      and are on 750+ campuses)

Series

Then, it includes a slide about its marketing strategy, which includes LinkedIn

where do your users come from (i.e. GTM)?
                                      
                                      funny enough, we use LinkedIn
                                      
                                      Our ICP is student entrepreneurs — so on top
                                      of LinkedIn, we go campus to campus. Events,
                                      ambassadors, in-person activations.
                                      
                                      In the net - months, we be shifting
                                      focus from GTM network effects

Series

Series tells investors it is 'pre-revenue by choice'

 firms get in front of exactly
                                      who they want - natively in iMessage,
                                      where GenZ already lives
                                      
                                      LinkedIn recruiter does $10B+/yr at a 57% read
                                      rate. Our messages get read 80% of the time.
                                      We haven't charged anyone yet . . .
                                      
                                      right now, we're focused on network density

Series

It ends the deck by sharing contact information and info about its pre-seed round

so what's next?
                                      
                                      We're raising a Seed Round. Our previous round
                                      included Pear Vc, folks prev @ a16z, the Co-
                                      founder of Venmo and more.
                                      
                                      if any of this resonated with you, let's chat
                                      
                                      the future is conversation. so we made
                                      sure our deck was one too . . .
                                      
                                      reach me at nathaneo.johnson@yale.edu

Series

Read next

Sydney Bradley is a senior reporter covering media and tech for Business Insider. She breaks news and writes extensively about Instagram and Facebook, as well as new platforms and startups shaping social media, dating apps, and the creator economy.Sydney's reporting on Instagram was nominated as a finalist for the 2021 Los Angeles Press Club's National Entertainment Journalism Awards.She graduated from the University of Virginia with a degree in American Studies. You can follow Sydney's work on LinkedIn, Twitter, and Instagram at @sydneykbradley.Have a tip? You can also contact her via encrypted messaging app Signal (@sydneykbradley.123), encrypted email ([email protected]), or standard email ([email protected]). Use a personal email address, a nonwork WiFi network, and a nonwork device; here’s our guide to sharing information securely.Selected stories:

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