Founders Directory LogoFounders Directory

Discover the next generation of startups.

A curated directory of high-growth companies backed by the world's most prestigious venture capital firms.

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Mason logo

Mason

YCombinator

Mason is the fastest way to take smart devices from idea to end user

. Whether building a single-use device from scratch or scaling a line of smart products, with Mason it’s 20x faster and 10x less costly to build, deploy and scale. Digital transformation is a modern requirement but operating a hardware-dependent initiative is hard – thousands of hours and millions of dollars are at stake. The Mason Smart Device Platform is the only fully managed infrastructure for developing and delivering dedicated devices. It offers flexible usage-based pricing for fleets of devices and manages the underlying complexity of all associated backend services, making software delivery on a smart product line—whether it’s a tablet, wearable or new form factor—as simple as delivering software in the cloud. This frees innovators to focus on what matters: application development, feature specification and UX. Granular access to add, remove or lock down capabilities makes it possible for highly customized products to be built as envisioned. Mason offloads hardware investment risks and logistics, including inventory procurement, warehousing and supply chain management. With options like zero-touch provisioning, devices can work perfectly out of the box without end user intervention. Remote fleet management, troubleshooting and automated software updates by Mason ensure security and positive end user experiences. Organizations of all sizes rely on Mason to bring innovations and hundreds of use cases to market without reinventing the wheel. Smarter from start to finish with Mason.™ AWARDS * 2023: Best Places to Work & Best Startups to Work For, Built In Seattle * 2022: Best Places to Work & Best Small Places to Work, Built In Seattle * 2022: IoT Health & Wellness Innovation of the Year, IoT Breakthrough * 2022: Bronze Stevie® Award - Emerging Technology, The 2022 American Business Awards® * 2021: Deloitte Technology Fast 500™, Deloitte * 2019: Tech Impact Awards, Mobile - Silver, Seattle Business magazine Follow us on LinkedIn | https://www.linkedin.com/company/mason-america/

Seattle, WAY Combinator LogoWinter 2016ActiveHardwareSaaSLogisticsSeattle
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 FranciscoY Combinator LogoSummer 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 FranciscoY Combinator LogoWinter 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 FranciscoY Combinator LogoWinter 2026ActiveSan Francisco
Maximal logo

Maximal

YCombinator

Truckload Planning at Machine Precision

Maximal is building autonomous systems to plan and move the world's freight. Our first product is a context-aware algorithmic load planning platform for full truckload (FTL) carriers. Our agents plug into a carrier's existing ERPs and communication channels, using that context to generate holistically optimized load plans. The result: carriers earn more revenue-per-mile while spending less time planning. Our founding team * grew up in 3PLs and trucking companies * studied the math behind transportation science at Cornell, Columbia, and USC * developed the technology that optimizes Amazon's distribution and fulfillment center network

San FranciscoY Combinator LogoSummer 2025ActiveArtificial IntelligenceLogisticsSupply ChainSan Francisco
Mayflower logo

Mayflower

YCombinator

AI plug-in that automates HR immigration screening and compliance

Mayflower is building an AI-powered HR plug-in that automates immigration screening, eligibility checks, and compliance for global candidates. The platform parses documents, classifies visa pathways, and generates attorney-ready forms. By integrating directly with existing HR systems, Mayflower helps companies surface only compliant candidates, reduce legal risk, and streamline the international hiring process.

San FranciscoY Combinator LogoFall 2025ActiveGovTechLegalTechImmigrationSan Francisco
MBX logo

MBX

YCombinator

A global multi-brand beauty and personal care startup.

MBX (formerly Memebox) is a multi-brand beauty and personal care startup headquartered in San Francisco. The venture-backed company has raised over $190M in funding from prominent investors, including Formation 8 & Group, Goodwater Capital, Johnson & Johnson, Pear VC, Y Combinator, and other Silicon Valley VCs. Memebox operates a portfolio of beauty and personal care brands that are co-developed with strategic partners like Sephora and Ulta, using data-driven insights to identify white space opportunities in the market. The company’s products are made in Korea, leveraging the latest K-beauty innovations in the formula, packaging, and speed-to-market. MBX has offices in San Francisco, Seoul, Shanghai, and Taipei, and its brands include Kaja, I Dew Care, Pony Effect, I’m Meme, and Nooni.

San FranciscoY Combinator LogoWinter 2014ActiveBeautySan Francisco
Meadow logo

Meadow

YCombinator

Point of Sale and Compliance SaaS for Cannabis Dispensaries

Headquartered in San Francisco since 2014, Meadow builds powerful Point of Sale and eCommerce software for retailers in the legal cannabis industry. Meadow’s all-in-one platform allows dispensaries to sell products, manage menus and inventory, reward customers, dispatch delivery and pick-up orders, and create exceptional in-store experiences for customers. Meadow powers dispensaries and delivery services of all sizes, utilizing technology to maintain compliance with local and state regulations, scale with the Adult Use market, and create operational efficiencies that allow these businesses to thrive in a regulated industry. Meadow’s team is dedicated to making the best retail software in cannabis, and to creating a more collaborative and inclusive legal cannabis industry. To learn more about Meadow, visit getmeadow.com.

San FranciscoY Combinator LogoWinter 2015ActiveSaaSCannabisSan Francisco
Medmonk logo

Medmonk

YCombinator

A tool for pharmacists to find funding for patients who are unable to…

Medmonk is a technology platform that helps fight non-adherence. It enables pharmacists to provide financial assistance to patients who are unable to pay for their medications. We partner with pharmaceutical companies, pharmacies, physicians, and health plans to improve outcomes by promoting access to chronic therapy. Medmonk is based on the premise that it's in everyone's best interest for medications to be used regardless of price. Patients get the care they need, insurers are protected against larger claims, and pharmaceutical companies and pharmacies get maximum use of their medications.

Milpitas, CAY Combinator LogoWinter 2012ActiveHealthcareMilpitas
Meesho logo

Meesho

YCombinator

Democratizing internet commerce for everyone in India

Meesho is India’s only true online marketplace, altering the status quo to make e-commerce inclusive and accessible for the next billion users. With a vision to enable 100 million small businesses, including individual entrepreneurs, to succeed online, Meesho is democratising internet commerce and bringing a range of products and new customers online. The Meesho marketplace provides sellers access to millions of customers, selections from over 30 categories, pan-India logistics, payment services and customer support capabilities to efficiently run their businesses.

Bengaluru, IndiaY Combinator LogoSummer 2016PublicE-commerceRetail
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