Social Network Startups funded by Y Combinator (YC) 2026

Founded by Steve Huffman and Alexis Ohanian in 2005, Reddit is an online community where users submit, vote, and comment on content, news, and discussions. Nicknamed "the front page of the internet,"​ Reddit is one of the top ten sites in the United States (source: Alexa), with hundreds of millions of users each month on desktop, mobile web, and our official Android/iOS apps. Interested in joining our growing team? Check out about.reddit.com/careers

Social networks are dead. Social media became more media than social. My friends aren't on social media anymore - it's one third ads, one third content from strangers, and one third AI slop. Our social lives are fragmented across dozens of different apps - iMessage, WhatsApp, Find My, Partiful, and Venmo. Digipals is the first AI-native social operating system that improves our relationships with friends. We built ambient AI agents that use social context from our location, calendar, and photos to take action and write code in our group chats. We are the last social platform anyone will ever need. Launch Video https://youtu.be/KW2tjLl6sxM

This is where real friendships begin. Women use our mobile app to talk to Lisa, our AI matchmaker, and get set up for fun social experiences with compatible new friends, all planned and coordinated by AI.

We're building the first group chat with social skills. While everyone else is stuck with boring individual chatbots, we've cracked the impossible: Alfi reads the room, understands each person, and creates custom intelligence for every group chat. Alfi is your new social friend. The one who remembers everything, plans effortlessly, and keeps the crew together. Here's what that looks like: - Book restaurants together, with Yelp built in, directly in the chat. No more "where should we go?" spirals. Reserve instantly. - Create images with your friends: drop your crew into funny hats, wild scenes, anything you can dream up. Multiplayer image gen, first of its kind. - Social calendar: upcoming hangs, all in one place. Everyone on the same page. - Group Wrapped: who's the chattiest? Top inside jokes? Now you'll know. - Reminders & Memory: Alfi remembers your spots, your preferences, and nudges you to actually hang out. We're in the middle of a quiet shift. Gen Z is leaving broadcast social media. They're retreating to group chats, smaller, more intentional and personal spaces where they're honestly themselves. But group chats are also where plans go to die. Someone has to be "the planner" or nothing happens. We believe the group chat is the real social network. Where the funniest moments and real conversations happen in real time. With Alfi, we hope to bring you together more expressively, a lot more often. This technology will bring humanity closer than it's ever been before. Not replace connection, deepen it. That's the future we're building toward.

Deep24 is a coach that syncs with all your data source, understanding you and then coming up with plans to improve your life.

CrowdVolt is rebuilding the infrastructure for live events, starting with an automated marketplace for raves and electronic dance music.

Moots is defining a new category , Guest Intelligence for corporate events. Every event tool today handles logistics: invitations, RSVPs, badges. None answer the questions that actually drive revenue: who should be in this room, why they matter, and whether the event created outcomes. We built the platform that does. Before the event, AI agents score every guest candidate 0–100 against your objectives, enriching profiles across dozens of intelligence sources in seconds — not the hours it takes a team to manually vet names one by one. PR partners, sponsors, and internal stakeholders collaborate on curated guest lists directly in the platform, each seeing only what they need to. At the event, every team member receives personalized briefing packets: who to meet, what to discuss, and shared connections to reference. Walk-ins and plus-ones are profiled in real time and routed to the right person on your team instantly. After the event, personalized follow-ups go out within hours — not weeks. Every interaction syncs to Salesforce or HubSpot, and leadership gets a clear ROI dashboard tying each guest to pipeline outcomes. For guests, Moots is equally transformative. A dedicated guest experience app shows attendees who's in the room, why specific people matter to them, and who to meet — turning passive attendance into meaningful connections that last well beyond the event. Trusted by corporate event teams, PR agencies, financial institutions, and advisory firms running branded houses at Cannes Lions, satellite dinners, investor retreats, and client cultivation events. Works standalone or alongside HubSpot, Salesforce, Splash, Paperless Post, and Luma.

Café makes it easy to discover people, meet in-person, and organize internal events. Boost connection, engagement, and attendance — all in one place.

Dumps is where friends connect through photos and chaotic messaging. Our users crave an expressive, low-stakes place to share their lives and interact.

We help to get rid of the things in your house that are no longer needed without spending any time or money. Our users bid on your items with virtual coins and can often find great products up to 95% off.

LineLeap gets customers to the fun, faster. On LineLeap’s mobile app customers purchase LineSkip passes, drinks, cover, and event tickets, at over 400 of the top nightlife venues in the country. Venues use LineLeap’s technology to create new revenue streams and market to their customers through push notifications, in-app messages, and email campaigns. LineLeap participated in Y combinator in the summer of 2019 and has acquired over 1 Million customers to date. LineLeap's long term vision is to be the must-have platform for all purchases, discovery, & fun at the world’s top venues & events while being the first choice for brands to connect with consumers.

Muslims don't date - they marry. Muzz is where single Muslims meet. We are the world's biggest Muslim dating app, boasting over 10 million members and over 500,000 weddings, Muzz is making a real difference in the huge yet untapped global Muslim demographic. Shahzad Younas (London, UK) is the founder and CEO of Muzz. Formerly a Vice President in Equity Portfolio Trading at investment bank Morgan Stanley for 9 years, Shahzad quit his career to fully focus on building a high quality mobile app to help Muslims around the world to find their perfect marriage partner. Backed with a total of $9M investment (Seed and Series A) from a range of Silicon Valley and global investors, headquartered in Aldgate, London, and boasting a fast growing 80 strong team, Muzz is transforming how Muslims meet and marry. Muzz was the first Muslim centric startup ever to be backed by Y Combinator (Summer 2017) - the prestigious Silicon Valley based accelerator behind Airbnb/Dropbox/Stripe, and has been featured on the BBC, The Times, The Evening Standard, The Financial Times, The New York Times, CNN, MensHealth, and TechCrunch amongst many others.

Mednet helps doctors answer their toughest clinical questions — blending AI, medical literature, and real-world physician expertise. Co-founded by siblings Samir Housri and Dr. Nadine Housri while navigating their father's cancer treatment, Mednet was created to capture the undocumented clinical knowledge that makes the difference in patient care. Today, over 40,000 US physicians use Mednet to navigate complex cases, make better-informed decisions, and shape industry innovation — ensuring that every patient benefits from the collective expertise of the medical community

9GAG is the global cross-platform entertainment media network. It is a place for fun, conversation, and engagement. Founded in 2008, 9GAG’s mission is to make the world happier. 9GAG has a total of 150 million global audience with 39 million followers on Facebook, 44 million on Instagram and 15 million on Twitter. Being #1 ranked global social media platform in entertainment & gaming, #1 ranked US's cross-platform video creators, we distribute 2.2 billion social video views on a monthly basis (source: tubular labs). 9GAG.com is #6 most followed brand on Instagram and is a top 200 website globally. 9GAG is backed by: Freestyle Capital, True Ventures, First Round Capital, Greycroft Partners, 500 Startups, Y Combinator and a group of great angel investors in the United States. eg Anthony Soohoo, Benjamin Ling, BoxGroup, Gary Vaynerchuk, James Hong, Kevin Rose, Karl Jacob, Lowercase Capital, Maneesh Arora, Naval Ravikant, Othman Laraki, Philip Kaplan, Rich Chen, Rich Lefurgy, Scott and Cyan Banister, Tim Ferriss.

Twitch is the world’s leading video platform and community for gamers. More than 100 million gamers gather every month to broadcast, watch and chat about gaming. Twitch’s video platform is the backbone of live and on-demand distribution for leading video game broadcasters including casual gamers, pro players, tournaments, leagues, developers and gaming media organizations. Twitch is leading a revolution in the gaming community, working to create a participatory experience that transcends gameplay. Learn more at http://twitch.tv.

The Fridge is a platform for lightweight single serving social networks for the functionality of Facebook without being on Facebook. The Fridge makes private conversation, media, and event sharing dead simple. The Fridge is like Tumblr for social networks. Anyone can easily create shared spaces, invite their friends and socialize/share photos, videos, music, and more. The Fridge reinvents how groups interact online allowing users to cut through the clutter of their social graph and create lightweight targeted spaces for personal and private relationships, special interest groups or clubs, or any temporary network around events, gatherings or nights out on the town...

FamilyLeaf is a private place to share your life with your family. You create a private page where your family can easily share photos, share life updates, store contact information, and post messages. Our mission is to bring families around the world closer together. Family is the most irreplaceable but overlooked social network; we want to help you share the little things that build a lifetime of love!