Hey HN, We built Upseated to solve a problem every traveler knows: you check in and discover you're stuck in a middle seat, or you're rows away from your kids, or you're right next to the lavatory in a non-reclining seat. Airlines let you pick seats during booking, but once you're assigned, you're basically stuck. We created a P2P marketplace where passengers can swap seats with each other—either upgrade to a better spot by paying another passenger, or monetize your own seat if someone wants it more than you do. How it works:

Enter your flight info and seat assignment Browse swap opportunities from other passengers on your flight Negotiate directly through the app Complete payment via Stripe Board with your original ticket, swap seats once on the plane

Technical details:

Native iOS and Android apps + web platform (upseated.com) Real-time matching algorithms to connect compatible swap partners Stripe Connect for secure P2P payments All swaps backed by contract law for user protection Works with all airlines (no partnerships needed)

Why this works legally: Airlines prohibit transferring tickets/boarding passes, but there's no regulation against seat swaps once you're boarded. The ticket gets you on the plane—where you sit is negotiable. Use cases we're seeing:

Parents separated from kids during booking Business travelers who need aisle seats for laptop work Budget flyers monetizing exit row seats they don't value Anyone who booked late and got stuck with terrible seats

We're live on iOS, Android, and web. Would love feedback from the HN community—especially around UX, security considerations, and potential edge cases we should handle. Happy to answer any questions!