Y Combinator Winter 2021 (W21) Companies

FlowEQ is a no-code workflow automation platform that embeds within existing business systems to automate recurring processes and support customer service, quality tracking, and member services operations. It provides integrations with 100+ business applications including CRMs, fulfillment systems, and e-signature platforms.

4 investors

FlutterFlow is a visual app development platform that enables designers, developers, and entrepreneurs to build mobile applications using a drag-and-drop interface. The platform generates functional apps rapidly and exports to Flutter code, serving development teams and product managers.

5 investors

Flux is a mobile financial app that enables users to send and receive money instantly across 40+ countries, create virtual dollar cards for online spending, and manage savings in multiple currencies. The platform serves individuals globally seeking free international transfers, online payments, and cryptocurrency trading through a single application.

2 investors

Flux retrofits existing material handling equipment with AI-powered autonomy hardware, enabling warehouses to automate pallet movement, material transport, and logistics tasks without purchasing new machines or modifying infrastructure. The company serves warehouse and logistics operations seeking to reduce labor costs and improve fleet utilization.

1 investor

Forcyte Biotechnologies develops drug screening tools that measure cell contractility to identify therapeutic candidates for diseases driven by abnormal cellular force generation, such as asthma, fibrosis, and hypertension.

2 investors

Foster is a community platform that facilitates structured writing groups called Writing Circles, combining guided meditation and somatic practices with collaborative writing sessions to help writers achieve flow and authentic self-expression. The service serves writers of all skill levels through weekly virtual sessions and periodic in-person retreats.

3 investors

Fountain9 provides demand forecasting and inventory optimization software to food brands and retailers, using historical sales data and pricing information to predict future inventory needs and reduce both stockouts and waste.

1 investor

A financial technology platform that enables fractional home ownership through partnerships with payment processors and banking services.

6 investors

Friz is a platform that consolidates social media content creation, publication, and advertising management across multiple networks into a single interface.

2 investors

FunctionUp, now operating as Polaris School of Technology under Classplus, offers outcome-focused engineering education in computer science and AI/ML for Indian students, partnering with UGC universities and delivered by IITians and software engineers. The program combines fundamentals training with paid internships and job placement support in technology fields.

3 investors

Furmacy provides e-prescribing software that allows veterinarians to digitally issue and manage prescriptions for animal patients.

1 investor

Gaiia is a platform with developer-focused documentation and APIs designed to help developers build integrations. The company emphasizes data security, compliance, and industry-standard protection for its users.

3 investors

LaunchPoint is a creator marketing platform that connects brands with a network of 50,000+ creators for on-demand content partnerships. The platform automates product seeding, audience targeting, and performance tracking across TikTok, Instagram, and YouTube, with built-in fraud detection and compliance tools.

2 investors

Gerald is an online retailer specializing in recurring and essential household products for individuals and families on tight budgets. The platform aims to provide affordable access to everyday essentials without financial strain.

4 investors

Gigs provides a platform (Gigs OS) that enables tech brands and other companies to launch and operate their own mobile services without managing telecom infrastructure directly. The platform handles connectivity, compliance, billing, and customer support automation, allowing non-telecom brands like Revolut, Cash App, and Klarna to offer phone plans to their users.

5 investors

A video distribution platform that allows artists, musicians, producers, and production companies to publish content and select from multiple revenue models including pay-per-view, subscription tiers, and merchandise sales. The service handles playback across connected TV devices and gaming consoles while providing audience analytics and promotional tools.

1 investor

GimBooks is a cloud-based, mobile-first invoicing and accounting platform designed for small and micro businesses in India and the Middle East. It provides GST-compliant billing, inventory management, and integrated banking features through an easy-to-use mobile app.

1 investor

Glop.dev provides AI tools that help engineering teams accelerate their development and deployment processes.

1 investor

GoBuild provides payment and working capital solutions designed for small construction firms, addressing cash flow delays through deposit financing, project-based lending, and subcontractor payment management.

1 investor

Atacaly is a Brazilian B2B marketplace that connects retailers and consumers directly with manufacturers and suppliers across product categories including apparel and automotive parts, eliminating intermediaries. The platform offers free listings with built-in search, product management, analytics, and direct communication via WhatsApp and Instagram.

1 investor

Gradia provides a virtual care platform for patients with chronic conditions, offering integrated communication and specialized care coordination between clinic appointments to supplement traditional in-person care.

2 investors

GreaseBoss develops industrial IoT systems for digital lubrication management, helping mining and industrial companies monitor and optimize equipment greasing to maximize productivity. The company serves tier 1 industrial producers globally with fixed plant and mobile equipment lubrication solutions.

1 investor

Great Question is a UX research platform that combines participant recruitment, study management, mixed-method research capabilities, and AI-powered analysis in a single system. It serves product managers, designers, UX researchers, and research operations teams across startups and enterprises seeking to consolidate fragmented research workflows.

4 investors

Greywing provides a data integration and vessel management platform for the maritime and shipping industry. The platform consolidates data from multiple sources into a unified dashboard, enabling real-time vessel tracking, operational decision-making, and analytics for crewing, commercial, and technical teams.

3 investors