AI Assistant Startups funded by Y Combinator (YC) in the San Francisco Bay Area 2025

Daily is real-time voice, video, and AI for developers. Our cross-platform SDKs and global infrastructure enable ultra-low latency, highest quality experiences for developers building real-time voice and video AI agents. Our platform also supports integration of traditional voice/video calls, in addition to AI agent experiences.

HR/IT/Finance professionals spend 50% of their time answering employees' questions and tickets. It’s even worse on the employee side, they have to wait for a long time for simple answers. We are live with 500 customers like Coca-Cola, Sony, Puma, Vodafone, Nestle, P&G, Airbnb, etc. We have raised over $40M from top VCs like Bessemer, Greycroft, Elad Gil, etc. Leena AI consumes company’s enterprise knowledge & starts answering all employee questions just like a human would. It can even answer complex personalized questions like Why is my salary less this month? Employees can access Leena AI from commonly used UIs like MS Teams or Slack.

Milo is the Family AI. We give busy parents back time + mindshare by tackling the daily details with a behind the scenes co-pilot. By pairing a human in the loop with the latest in LLM capabilities we're able to effectively build a copilot for detailed, high context and noisy tasks, via a simple conversational SMS interface.

Modern teams work in the browser. But browsers weren't built for teams 😔. This leads to a bunch of problems like: - Knowledge/info that is hard to find (links that get lost, documentation that gets, buried, silos, etc) - Poor collaboration - Inefficient workflows LinkGrep is an AI browser copilot that solves those problems by making your browser team friendly. Specifically we help teams: 1. 🔗 Keep track of links, documents, and more automatically. With LinkGrep you'll never have to manually add or save a link. 2. 🔍 Find information that matters. LinkGrep connects with your existing tools like Notion and Slack and will automatically suggest relevant information to you as your browse (we have semantic search that you can fallback on). Demo: https://youtu.be/jwcPGDRy4oQ 3. 👥 Collaborate better. LinkGrep lets you leave notes and comments directly on web pages — you won't ever have to copy paste a link into Slack ever again. 4. 🤖 Automate team actions like opening up the right links before a meeting. Never disrupt a meeting to send a link again. Demo: https://youtu.be/an3VKpAWft0

At Sentiyen, we build GPT-based AI assistants that are trained on your content and enable your audience to get the answers they need 24 hours a day. We allow creators and businesses scale themselves to unlimited 1:1 conversations with potential customers, which helps increase revenue, reduce spend, and improve customer satisfaction.

Ponyrun evaluates people for you. We help you answer questions like: Should you sell to them? Are they a good fit for your product? Should you interview them? Its easy to use. Give it a search URL or a list of people. Tell Ponyrun what you want to evaluate the person on. And Ponyrun will go through the person's information (e.g. LinkedIn), and evaluate them.

We make it easy for small and medium businesses to build an AI sales agents for their websites and social media, augmenting their sales capacity. This assistant provides personalized shopping recommendations to customers and is available 24/7 to answer their questions.