Y Combinator Winter 2021 (W21) Companies

Machine26 facilitates the buying and selling of used construction equipment through a digital platform, serving construction industry professionals who trade capital goods.

1 investor

MagicBell provides notification infrastructure for product teams to build notification experiences for their users. The platform enables developers to implement notification systems quickly without extensive engineering effort.

1 investor

Manara provides bilingual upskilling and reskilling training for teams in MENA in AI, cloud, and digital skills, partnering with governments, foundations, and organizations. The company combines global expertise with local implementation to help non-technical and technical professionals gain capabilities in emerging technologies.

3 investors

Mayan provides AI-powered software to automate data-intensive operational tasks for e-commerce brands and sellers. The platform helps businesses manage complex backend operations on major marketplaces.

2 investors

Measured provides telehealth-based weight loss and metabolic health treatment using GLP-1 medications, supported by physicians and health coaches. The service targets individuals with obesity and chronic disease in the U.S. through personalized, science-backed treatment plans.

3 investors

MedMe builds a pharmacy-specific electronic health record platform with AI-powered clinical documentation and Medicare Part B billing infrastructure for community pharmacies in the United States. The platform enables pharmacists to document and bill for clinical services including immunizations, counseling, and chronic care management that are already being delivered but largely unbilled.

1 investor

MeetAnyway provides software for hosting online conferences with built-in networking features that allow attendees to connect with each other, self-organize meetings, and maintain contacts—focusing on the relationship-building aspects that typically draw participants rather than talk consumption.

1 investor

Mendel is an AI-powered platform for corporate expense management serving large enterprises in Latin America, offering features including intelligent corporate cards, automated invoice recovery, instant reimbursements, and travel management with real-time visibility and control. The platform integrates with enterprise ERPs and uses AI to validate invoices against Mexico's SAT and enforce spending policies.

5 investors

Meru operates an online marketplace connecting mechanics in Latin America with automotive aftermarket suppliers and parts dealers.

2 investors

Mezli operates automated restaurants housed in shipping containers that prepare and serve affordable meals for takeout and delivery.

2 investors

Milk Video is a platform for creating and distributing short-form video content, allowing marketers to quickly collect and produce customer testimonials, employee testimonies, and expert commentary.

1 investor

Mindee provides an AI-powered OCR API that extracts structured data from documents including invoices, receipts, passports, and other formats, converting unstructured documents into JSON with high accuracy. The platform serves businesses across industries that need to automate document processing workflows without requiring model training.

4 investors

An AI research organization that develops interface innovations and neural technologies, focusing on human-AI interaction breakthroughs including neural signal processing and thought decoding methods.

2 investors

ModernLoop is a platform for automated interview scheduling that helps recruiting teams manage candidate scheduling and track hiring metrics. It integrates with existing recruitment workflows to reduce scheduling delays and improve recruiter efficiency.

1 investor

Moichor is an animal diagnostics laboratory providing automated blood count and cytology testing for veterinarians across the United States. The company uses artificial intelligence and computer vision to deliver species-specific pathology results through both send-in laboratory services and an in-clinic hematology device.

3 investors

Mono provides financial data access, identity verification, and direct bank payments for businesses in Africa through an open banking platform. The company serves fintech companies and banks across three African countries.

8 investors

Razor Group develops next-generation e-commerce products with a focus on building a global e-commerce platform. The company combines entrepreneurial, financial, and product-building expertise with technology development.

6 investors

Moon Valley develops Marey, an AI video generation model that creates image-to-video and text-to-video content with cinematic quality, trained on licensed footage and designed for professional filmmaking and screen production. The platform targets filmmakers and creative professionals who require studio-grade quality, precise motion control, and commercially safe licensed content.

7 investors

Morada Uno provides tenant screening and background check services for property owners and landlords in Mexico. The platform evaluates prospective tenants' creditworthiness, legal history, and rental reliability to mitigate rental risks.

3 investors

Viridi manufactures lithium-ion energy storage systems designed for installation in occupied spaces and around critical equipment without requiring additional construction or grid upgrades. The company serves customers seeking compliant, scalable distributed energy storage solutions in the United States.

1 investor

My NextDerma is a telemedicine platform that connects patients with dermatologists for virtual consultations, diagnoses, and prescription fulfillment in Mexico. The service integrates a pharmacy offering dermatological products and treatments, delivered directly to customers' homes.

1 investor

Mystic provides an API platform that deploys and runs machine learning models either on shared serverless infrastructure or on customer systems, handling operational tasks like load balancing, scaling, and GPU resource management without requiring dedicated MLOps staff.

1 investor

Vui App is a payroll flexibility platform that enables workers to access wages between regular paydays and provides employers with an alternative payroll disbursement model. The application was developed by Nano Technologies Vietnam to serve the Vietnamese employment market.

5 investors

Navattic builds interactive product demo software that helps sales teams engage buyers and accelerate deal closure. The platform serves B2B software companies looking to showcase their products to prospects.

4 investors