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Masterpiece logo

Masterpiece

YCombinator

Working capital for data companies training frontier AI

We believe AI will be one of humanity’s next great masterpieces. Building it will require financial infrastructure as ambitious as the companies creating it. We're founders backed by Y Combinator building the financial rails underpinning the AI data economy. Masterpiece provides short term working capital to data vendors that sell training data, evaluation work, and reinforcement learning environments to frontier AI labs. A major financing gap exists in this market. Data vendors often need to pay contributors and fund operations before a lab has completed QA, accepted the work, and paid the invoice. This creates a 30 to 90 day cash gap between when vendors incur costs and when they receive payment. Legacy invoice lenders have little visibility into how to underwrite these assets. Masterpiece closes that gap by advancing capital against high quality lab contracts and invoices. Vendors can use the capital to scale delivery, pay contributors, and fund growth, then repay masterpiece when the lab payment arrives.

FintechNew York City, NYCrypto / Web3LendingAI
matagora logo

matagora

YCombinator

Empowering local retailers with tech that works for them.

At Matagora, our team brings over a decade of retail experience. Our mission is to empower independent retailers with the tools they need to compete with big box stores and effectively level out the playing field. One of the biggest challenges we see is staffing — many retailers struggle to maintain consistent, reliable, and properly trained team members to handle back-office tasks, marketing, ecommerce, POS management, and basic tech know-how. That’s why we offer affordable, ecommerce expertise as a service. Retailers no longer have to worry about high turnover, constant retraining, or trying to learn everything themselves. Instead, they can stay focused on what they love: curating great products and delivering an amazing in-store experience — while we handle the rest. And since it’s a simple expense, it’s easy to plan for and write off, too.

B2BMontreal, CanadaMarketplaceMarketingRetail TechRetail
Materee logo

Materee

YCombinator

E-commerce platform for construction materials in Indonesia

Materee is an e-commerce platform for construction materials in Indonesia. Construction is one of the most important industries in Indonesia. Despite its importance, procuring raw materials for construction work involves many phone calls, text messages, as well as back and forth communications. Materee aims to transform and simplify construction material procurement process while assisting contractors to focus on the most important activity, completing their projects.

B2BJakarta, IndonesiaConstructionB2B
Matidor.com logo

Matidor.com

YCombinator

Project management on a live map

Matidor.com is a project management software for projects where you need to see what's happening live on a map. Natural resources companies such as energy operators and consultants manage their environmental activities across thousands of locations. Instead of switching between spreadsheets, they need to visualize their projects on a map and zoom into each one of them for details such as site drawings, tasks, costs and communications. https://matidor.com

B2BVancouver, CanadaSaaSGeographic Information SystemB2B
Matrubials logo

Matrubials

YCombinator

Developing milk-inspired therapeutics for infectious diseases

Matrubials is an anti-infectives company, focused on human milk peptides as therapeutics to address antimicrobial resistance and modern diseases. Currently the global rise in severe bacterial infections and the drying pipeline of effective treatments are burdensome for healthcare and economics. Sculpted by evolution, milk, first food for the newborn, provides an exemplary solution to address the nutritive and protective challenges an infant is faced with. The anti-pathogenic molecules from milk can be developed into therapeutics geared towards all-age diseases. Our first indication is bacterial vaginosis, a bacterial dysbiosis related inflammation that results in recurrent infections, disruption of homeostasis and long-term clinical complications in women of reproductive age, including but not limited to preterm births, fertility issues and increased rates of STDs. Our next inflection point is the evaluation of rapidly acting and selective candidate peptides in pre-clinical host impact and early safety studies, which can aid clinical and portfolio development towards topical applications.

HealthcareDavis, CAAI-powered Drug DiscoveryWomen's HealthTherapeutics
Matter logo

Matter

YCombinator

Building the future of reading

Matter is a powerful, modern reading app that lets you save media from anywhere, pulls in your newsletters, lets you listen to your articles in a natural voice, and much more.

ConsumerSan Francisco

Mattermark

YCombinator

Big Data Meets Startup Investing The best tool for tracking and…

At Mattermark, we’re accelerating sales and deal making through data and automation. Mattermark collects and organizes comprehensive information on the world’s fastest growing companies. In minutes, get actionable data that lets you pinpoint the companies and people you need to know or do business with. Today, over 500 companies use Mattermark to discover high quality leads, prioritize prospects and increase conversion rates.

B2BSan FranciscoInvestingBig Data
Mattermost logo

Mattermost

YCombinator

Secure Collaboration for Technical Teams

Mattermost provides secure collaboration for technical and operational teams that work in environments with complex nation-state level security and trust requirements. We serve technology, public sector, national defense and financial services industries with customers ranging from tech giants, to the world’s largest banks, to the U.S. Department of Defense and governmental agencies around the world. Our self-hosted and cloud offerings provide team messaging, file sharing, integrations, audio and screen share, workflow automation and project management on an open source platform deployed by the world’s most secure and mission critical organizations. We co-build the future of collaboration with over 4,000 open source project contributors who’ve provided over 30,000 code improvements towards our shared product vision, which is translated into 20 languages.

San FranciscoSummer 2012ActiveDevSecOpsCollaborationSecurityOpen SourceSan Francisco
Matterport logo

Matterport

YCombinator

Turn physical objects and environments into 3D models in seconds.

Matterport is an immersive media technology company that is shaking up the 3D / VR world. Our team has built the first end-to-end system for creating, modifying, distributing, and navigating immersive 3D and virtual reality (VR) versions of real-world spaces on web and mobile devices. Matterport offers the world's most inexpensive and simplest way to capture 3D spaces. Our products include: - Matterport Pro Camera for capturing real spaces in 3D. It collects accurate visual and spatial data to map entire areas in minutes and is all about automation and ease of use. - The Matterport Cloud for processing and hosting 3D models - Matterport Portal, our system for viewing, editing, and managing models; collaborating with colleagues; and sharing models with others - Matterport 3D Showcase, a browser-based 3D media player, which allows anyone to view 3D models in their browser with no additional software - Matterport Core VR: All Spaces can be converted to VR and experienced on Samsung Gear VR or Google Cardboard (in beta), with additional device support coming soon. Matterport 3D media solutions power industries from real estate (residential, multi-family and commercial) and travel and hospitality (hotels, vacation rentals, and venue booking), to business listings, architecture, engineering and construction, news and entertainment, and everything in between. We’re growing fast. If you’re passionate about solving cutting-edge problems in computer vision and hardware design and creating order-of-magnitude improvements in the ability to easily create and share 3D models of real world spaces, we want to talk to you. See open positions at matterport.com/jobs. Try Matterport for yourself at matterport.com/try.

San FranciscoWinter 2012PublicComputer VisionSan Francisco
Maven logo

Maven

YCombinator

Payments Infrastructure for Voice Agents

We enable AI voice agents to collect payments over the phone through a single API call, handling card processing and PCI compliance across all payment gateways

San FranciscoWinter 2026ActiveSan Francisco
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