Discover the next generation of startups.

Alloovium

YCombinator

Construction paperwork that finally works for your team

Alloovium is the document intelligence layer for construction 🏗️ It reads every document and piece of data on a project (contracts, specs, drawings, compliance records, conversations), turning them into answers you can trust and actions with real value: every answer cites its exact source sentence, paperwork is checked clause by clause against the builder's own Integrated Management System, and nothing AI-drafted moves without a human sign-off, with it all compliant by default.

Allowance

YCombinator

The spend control layer for AI agents

Allowance lets AI agents make purchases on a user’s behalf without ever exposing your real card number. Users approve purchases directly from their iPhone with customizable controls like spending limits, merchant restrictions, and expiration windows. Once approved, Allowance generates scoped, one-time payment credentials designed specifically for that transaction. This enables AI agents to safely complete tasks like shopping, ordering food, booking reservations, or purchasing tickets while keeping humans in control of every payment.

Allus AI

YCombinator

Transforming manufacturing with our next-gen Vision Foundation Model

Allus builds next-gen vision foundation models that bring real intelligence to manufacturing. Enabling factories to see, understand, and improve production in real time.

Almanac

YCombinator

Self updating wiki for your coding agents

Almanac is a self-updating wiki for your coding agents. It turns your team’s AI coding conversations into connected Markdown docs that live inside your repo. Your agents automatically search the wiki before making changes, so every agent working on the codebase starts with the same context, decisions, and implementation history.

Alt-X

YCombinator

Building the best venue for private markets exposure.

Alt-X is building the AI-native liquidity layer for private markets. Private markets have created trillions of dollars in value, yet remain fragmented, illiquid, and inaccessible. While public markets benefit from exchanges, market makers, brokerages, and data infrastructure, private markets still rely on brokers, spreadsheets, and manual workflows to connect buyers and sellers. Alt-X uses AI to automate the core functions required to make private assets liquid. We streamline diligence, valuation, investor matching, and transaction execution, reducing the friction that makes private-market transactions slow, expensive, and opaque today. Our initial focus is venture-backed secondaries. We source opportunities from founders, employees, and early investors while building a network of accredited investors seeking exposure to the world's most valuable private companies. Over time, we believe every private asset—from startup equity to private credit and alternative investments—will require modern liquidity infrastructure. Building trusted infrastructure for private markets is difficult. Transactions involve complex diligence, fragmented information, transfer restrictions, and significant compliance requirements. Alt-X is focused on creating systems that can support real transactions at scale, not just marketplace listings. Ryan Samadi (Stanford CS/AI, former Citadel commodities trader) and Michael Wachsman (Cornell CS, infrastructure engineer) are building Alt-X because they believe ownership of innovation should be more liquid, transparent, and accessible. Today, Alt-X has sourced over $1.5 million in transaction opportunities and assembled a network of 40 accredited investors representing hundreds of millions of dollars in investable assets. Our mission is to democratize ownership of innovation by building the financial infrastructure that private markets have never had.

Altur

YCombinator

Voice AI Agents for Debt Collection

Altur is an innovative startup in the tech space.

Ambition

YCombinator

Coaching and gamification software for sales teams.

We motivate employees to reach their potential, empower managers to be great coaches, and ultimately help sales teams hit number with great culture. We do this through an extensive suite of coaching and gamification tools, all powered by sales activity data.

Amplitude

YCombinator

Digital Analytics Platform

Since graduating from YC, Amplitude (W12) has made it to IPO and beyond by helping cutting edge startups become category leaders. We’ve pioneered the digital analytics category to become the go-to solution for AI pioneers (Cruise, Midjourney), apps that touch millions of consumers (Doordash, Coinbase), and the best in B2B (Atlassian, Rippling, Canva). With product analytics, experiment, CDP, session replay, and more, Amplitude’s digital analytics platform shows you what your users love, where they’re getting stuck, and what keeps them coming back. You want to build a generational business, and we have the capabilities and pricing plans to guide you every step of the way. Check out our special deal for YC companies and get started on your analytics journey.

Amulet

YCombinator

Agents that drive customer success

Amulet helps post-sales teams monitor every account and automate the work that drives retention and expansion. Our agents connect to customer data (CRM, support, product usage, and communication data) to flag churn risks, surface upsell opportunities, track adoption, and draft the right messages for each customer.