Discover the next generation of startups.

Lance

YCombinator

AI Agents That Run Hotel Operations.

Autonomous AI agents that answer calls, close sales, and run operations, so your team can focus on guests. Trusted by some of the top hotel groups in the US, supporting 50+ hotels across brands like Marriott, Hilton, and Hyatt Built on advanced Computer Use Agent technology, Lance agents can navigate your existing hotel software, make real-time decisions, and handle complex multi-step tasks.

Lapis

YCombinator

AI that creates and runs ads, end-end

Lapis gives businesses the ability to run end-end ads on AI platforms, starting with ChatGPT Ads. With Lapis, businesses can rapidly iterate on ad copies and A/B test at scale without being bottlenecked by design and creative capacity. Lapis can also be used on traditional ad platforms like Google and Meta, where marketers can use Lapis to generate ad creatives, headlines, and get feedback on what ads actually work. Lapis is used by 1,000+ marketing teams, from big businesses like Hyundai and Tata to small businesses around the world, and supports 15+ languages including English, Spanish, and Italian.

LATO

YCombinator

Agent-native research and simulation platform for investors

The best investments come from conviction, and conviction comes from understanding a market deeply: its customers, its competitors, and where it's heading. Today that understanding is slow and expensive to build. Reaching the right people takes weeks, a commercial study costs $300k+, and each one starts from scratch. LATO does this research end-to-end, combining public data and the fund's own knowledge with first-hand interviews of a market's customers, experts, and operators. This research grounds a simulation of the market to predict how market participants behave.

Lattice

YCombinator

Modern people management platform.

Lattice is people success software that empowers leaders to build engaged and high- performing teams, inspire winning cultures, and make strategic, data-driven business decisions. Our software helps nearly 4,000 companies globally align employees to the most critical objectives, measure and reward performance, and create an effective feedback loop between employees and managers.

Lattice Health

YCombinator

Monitoring and governance for deployed medical imaging AI

Lattice Health monitors deployed medical imaging AI so hospitals can tell whether each model is still working, tracking agreement with the radiologist's read, drift, and performance across patient groups. It observes rather than controls and produces the evidence teams need for safety, governance and compliance.

Laurence

YCombinator

Hedge fund for ads

Advertising today is like trading in the 1980s pits: archaic, manual, and iterative guesswork. Humans update bids and keywords with noisy, delayed data using simple if-else rules that both break at scale and ignore stochasticity. Laurence advertises like modern hedge funds trade markets, driving a 15-40% improvement in net profit for Amazon brands within a month of onboarding.

Lawdingo

YCombinator

Lawdingo provides virtual paralegal services to law firms.

Lawdingo gets people in touch with a lawyer very quickly. Lawdingo gives people seeking legal services direct access to independent lawyers who can help them. Such attorneys usually have more flexible hours, lower rates, and greater interest in customer service than to their larger firm counterparts. The problem is that there is so many such lawyers; how is someone supposed to figure out who is right for them, and who has some time to take on their case? Fair question. Coincidentally, we started Lawdingo to answer just that. If you're looking for a lawyer, we encourage you to try finding an easier way to get one to work for you. If you are a lawyer working in solo or small practice, we encourage you to find a more effective way to grow your law practice. We also encourage you not to take our word for it. Read what Solo Practice University, the ABA Journal, FindLaw, AboveTheLaw, TechCrunch, Lifehacker, and others say about us. This isn't some fly-by-the-night company. This is the future of the legal industry. We hope you'll get in touch. Lawdingo was started by Nikhil Nirmel (nikhil@lawdingo.com), an entrepreneur with a background at Yelp and Wharton Undergrad, and Dan Langevin , a ridiculously talented technologist who was formerly CTO of Lifebooker. Lawdingo has backing from Y Combinator and other investors.

Leadbay

YCombinator

Qualify millions of Data-Signal-Scarce leads that couldn't be found…

Leadbay qualifies millions of Data-Signal-Scarce leads that couldn't be found before. Teams at L'Oréal, Saint-Gobain, Gerflor USA, Corgi, and Nespresso B2B have 3x'd their addressable market and 10x'd what they defined as "qualified leads". Talking to our customers, we used to hear, "10 minutes on Leadbay beats 6 months with Clay and a GTM agency." Co-founders are Milan Stankovic (CTO) - PhD to make AI work with limited data, and Ludovic Granger (CEO). Create an account. A new market is yours. leadbay.ai.

Leaders In Tech

YCombinator

Become the leader your company needs.

Leaders In Tech is a leadership accelerator designed for startups. Over 350 alumni founders now run companies valued at over $75B that employ thousands of people. Here is what some YC alums had to say about Leaders In Tech: Justin Kan (Twitch/YC): "It was a huge uplevel for me as a leader and a human being and I recommend it to all my founder friends." Daniel Kan (Cruise): "Best program I've ever done. Highly recommend." Harj Taggar (YC): "This is the best thing a leader could do for their company" Jack Altman (Lattice): "I came in a skeptic and left a convert." Claire McDonnell (True Link): I’m a better leader and human being (and also parent) because of it. Amir Nathoo (OutSchool): I found LIT to be deeply transformative and hugely valuable for my company and life. Couldn’t recommend it more. Jon Lerner (Cointracker): LIT was the most impactful thing I’ve done for my growth as a person & leader. I highly recommend it to every YC founder. Kanjun Qiu (Imbue): LIT was life-changing for me and started my entire personal growth journey. I’m a much, much better founder (and much happier human) as a result. Read more private YC testimonials in the comments here: https://bookface.ycombinator.com/posts/80276 We offer a dedicated 6-month program for Seed founders and a 10-month program for Series A to Pre-IPO. Send me a DM if you would like a nomination.