TinVec is an approach used by Tinder to provide personalized recommendations based on user embeddings. It maps each user to an embedded vector representing their characteristics based on who they swipe on. Vectors for similar users are clustered closely together. To recommend new users, it calculates a preference vector for a user based on who they liked and recommends those near the preference vector. TinVec achieves over 90% accuracy in predicting swipes and will be used to introduce new product experiences at Tinder to present users others are likely to like.