The 9 most sought-after startups from YC Demo Day

Y Combinator organized his Summer 2025 -Demo Day last week, with the newest party of more than 160 startups.

Just like with recent batches, most startups presented AI-centric solutions. However, a clear evolution was clear. Instead of “AI-driven” products, many companies now build AI agents or the infrastructure and tools that are needed to develop them. This batch had, for example, a flurry of Voice AI solutions and new companies aimed at helping others to earn income with the “AI economy” with advertisements and marketing tools.

We spoke with a handful of YC-oriented investors to learn which startups they found most interesting and who generated the highest investment question.

Below are the most mentioned:

What it does: Stripe for AI startups

Why it’s a favorite: Many AI startups use complex price models that often combine fixed subscription costs per seat with use-based costs, credits and various add-on costs. Managing complex AI prices on Stripe is a time-consuming, manual process. That is why autumn has developed an open-source infrastructure that simplifies the Streep integration for AI startups. The company says that its technology is already being used by hundreds of AI apps and 40 YC startups. Given the dominance of Stripe in payments and the explosive growth of the AI ​​market, can a specialized invoicing solution be the next Grand Fintech success story for AI?

What it does: Builds Vercel for AI agents

Why it’s a favorite: Just like Vercel developers helps to implement and organize startups, Dedalus Labs claims that his platform automates the infrastructure for building AI agents, causing hours to cut to a few clicks. The company processes complex tasks such as autoscaling and load balancing, which says that agent makes implementation quickly and easy.

What it does: Crowdsource rankings of atmosphere coded designs

Why it’s a favorite: AI’s ability to quickly generate a large number of designs creates a new problem: figuring out which are actually good. Design Arena dissolves this by crowdsourcing rankings of AI-generated visuals, creating a feedback job that forces AI models to improve. Large AI laboratories see value when training their models to generate better designs, because some of them are all the customers of Design Arena.

What it does: Tech-compatible distributor for retailers in Southeast Asia

Why it’s a favorite: Tasap Asia was founded three years ago by Raghav Arora when he was only 14 years old. Since then, the startup that technology uses to supply supplies to corner shops, restaurants and large supermarkets in Southeast -Asia in less than eight hours, has earned millions of income. Tack juice Asia closed a round of general catalyst, according to his websiteAnd we hear that the appreciation of the startup was one of the highest in the entire party.

What it does: AI -Engineer who repairs bugs in production

Why it’s a favorite: Founded by a 20-year-old Pablo Hansen who obtained a master’s degree in AI last year, KeyStone is on a mission to reduce software pauses. The AI ​​of the company finds and repairs Bugs for customers such as Lovable and has already rejected an acquisition body of seven digits, Hansen said.

What it does: AI Matchmaker for female friends

Why it’s a favorite: Although there is no shortage of dating apps, Realroots tackles a different kind of loneliness. The AI ​​matchmaker of the company, Lisa, interviews women and then organizes social experiences to connect them with compatible friends. Although the AI ​​part may be performing – conversations with Lisa would probably not give any more insights about participants than written answers – Reoots can be on something. Last month alone, the company generated $ 782,000 of 9,000 paying customers, the founders said.

What it does: Automates insurance claims with AI

Why it’s a favorite: The AI ​​of SOLVA automates the most routine tasks for insurance regulators, to fill in complex claims to prevent incorrect payments. Only ten weeks after the launch, Solva has already collected $ 245,000 in annual income (ARR), a figure that has enthusiastic investors.

What it does: Counter-drone mini-rissiles

Why it’s a favorite: With China Reportedly The US Army collects swarms of cheap drones and is confronted with an urgent need for cost-effective solutions for counter-drone. Perseus develops exactly that: small rockets that are designed to shoot drones against a fraction of the costs of existing systems. Several branches of the US Army have already invited the startup to demonstrate the solution, which can lead to substantial contracts.

What it does: AI Foreign Language Tutor

Why it’s a favorite: Apps such as Duolingo have made language learn accessible and fun, but they often miss an important part of fluency: consistent conversation. Pingo solves this problem by enabling users to speak with his AI, which acts as a native speaker. The unique approach of the company is incredibly popular, whereby founders claim that it grows 70% monthly and earns $ 250,000 in monthly sales.