Personalization Startups funded by Y Combinator (YC) 2026

What Corsair is: Corsair gives you (or your agent) safe access to hundreds of integrations. It natively handles all integration plumbing. The only code you write is the code that's specific to your use case. Your data stays yours. Why we wrote it: Integrations make products capable. Integrations are also frustrating to write. If you look at any codebase with integrations, 95% of the code is identical. It's all just basic plumbing. The part of the integration that is unique to a codebase and actually adds value is probably just a few lines. We shouldn't waste time writing and maintaining the 95% for a few lines. The developer community has just accepted that we do. Corsair handles the 95% so you don't have to. It's really hard to get wrong.

Always-on AI agents for 1-1 personalization at scale

We’re a customized beauty brand at the intersection of tech and beauty, setting out to democratize custom beauty and truly empower individuality. There’s no one size fits all with us.

Indivio's video creative automation capabilities enable modern marketing teams to more easily deliver dynamic video experiences that improve business outcomes.

NeoWize changes the way we look at machine learning and deep learning. Current deep learning algorithms focus on making the most out of the data available. NeoWize utilizes neural networks and adaptive input to create more data and better data, thus increasing our predictive power with small data-sets. We use this technology to help e-commerce sites learn what each individual buyer is looking for and create a better user experience from the first visit.

LiftIgniter uses cutting edge data science to help publishers and retailers optimize their websites and mobile apps in real-time. Machine learning personalization puts the perfect piece of "content"​ (video, article, item to buy) in front the user at the exact moment when they are most likely to engage or convert - no tags or manual work required. The machine learns and updates itself so that's it's always perfectly in sync with your users and your "content."​ We average 50% improvements in CTR, engagement and conversation - with only a day's work on your part. Imagine creating a truly dynamic, real-time digital property that enables the perfect experience for that user impression at that moment in time. That is LiftIgniter! Our team of PhDs has direct experience building state-of-the-art personalization systems at the petabyte scale for some of the largest companies on the planet. Unless you plan on hiring your own team with deep experience (not likely since very few people with that experience exist), you should contact us to talk about how we can supercharge your digital experiences.

Knowmia is a destination for learning that features short video lessons from great teachers everywhere. We help you to find what you need to succeed in school in a personal, affordable, and time-efficient way. By bringing together a wide range of video lessons and making it easy to find what you need, we help you with challenging topics, prepare you for an upcoming test or new course, and find the right teacher for your style of learning.