Y Combinator Winter 2021 (W21) Companies

Gridware provides real-time monitoring and visibility of electrical grid conditions through sensors deployed on power lines, enabling utilities and line workers to detect and respond to problems faster. The platform serves electric utilities and their field teams to improve grid reliability, reduce outage response time, and prevent wildfire ignition.

11 investors

GroMo is a platform that enables individuals to earn income by selling financial products from partner brands within their networks. The company serves anyone seeking supplementary income, including working professionals, students, and homemakers, by providing education, customer management tools, and commission-based payouts.

5 investors

H3X designs and manufactures advanced electric motors for industrial applications. The company operates a full-stack engineering facility with in-house manufacturing capabilities including CNC machining, power electronics labs, and test cells.

4 investors

Hapi offers Latin American consumers a mobile platform to buy stocks, ETFs, and cryptocurrencies without account minimums or trading fees, accessible in minutes.

2 investors

Haystack connects to Git and Jira to help engineering teams automate best practices, track capacity, and generate reports across the planning, execution, and delivery lifecycle. It serves product engineering teams seeking to improve planning consistency, cycle time, and delivery visibility.

3 investors

Hermes Robotics manufactures autonomy retrofit kits that enable low-speed vehicle automation for any vehicle type. The company serves vehicle operators and fleet owners seeking autonomous capability retrofits.

2 investors

Homebase offers rent-to-own financing for residential real estate purchases in Southeast Asia, providing an alternative to traditional mortgages with high interest rates. The company targets homebuyers in the region seeking flexible financing options through technology-enabled solutions.

1 investor

HomeBreeze is a platform that allows homeowners to obtain HVAC heat pump quotes by uploading photos, which AI analyzes to create accurate project scopes and identify available rebates and tax credits. The service connects homeowners with vetted local contractors for competitive bidding.

1 investor

Hoop.dev provides a security gateway that inspects and controls database queries, API calls, and commands at the protocol layer, masking sensitive data and blocking risky operations before they execute. The tool operates as middleware for engineering teams to prevent unauthorized data access and enforce security policies without requiring code changes or SDK installation.

3 investors

Houm is a proptech platform that helps property owners list and rent residential properties in Latin America. The company operates in Mexico, Chile, and Colombia, offering digital property management services including tenant matching and maintenance coordination.

10 investors

Howdy.com connects US technology companies with software engineers across Latin America who operate within US business hours, and provides recruitment, equipment, benefits administration, and office space management to support distributed engineering teams.

5 investors

HUBUC provides financial infrastructure and fintech products for small and medium enterprises. The platform democratizes access to banking services through Banking as a Service and payment solutions.

3 investors

Huddlefire provides a platform for SaaS companies to accelerate customer acquisition through partnerships with other SaaS businesses. The service enables cross-company collaboration to drive growth and expand market reach.

1 investor

Hudu is a documentation and knowledge management platform that captures, standardizes, and centralizes IT infrastructure documentation, passwords, and organizational knowledge. It serves IT teams and technicians who need to maintain consistent documentation and reduce time spent on routine tasks.

1 investor

Humaans builds an employee management platform that automates the employment lifecycle, including onboarding, offboarding, promotions, and compensation management, by connecting point solutions with a central employee data hub for People Ops, Finance, and IT teams.

4 investors

Humance develops AI products designed to augment human capability and decision-making rather than replace human workers. The company builds tools for domain experts and practitioners that explain their reasoning, maintain transparency, and defer to human judgment.

1 investor

HyperGlue provides machine learning analysis of large text datasets, allowing product teams and operators to identify patterns in customer feedback and other text-based data without requiring in-house AI engineering expertise.

1 investor

inBalance uses machine learning to predict electricity prices, helping energy storage operators, EV charging networks, and similar businesses optimize revenue.

4 investors

Infracost provides cloud cost management and FinOps tools that help engineering teams estimate cloud costs and optimize spending across AWS, Azure, and GCP. The platform serves enterprise customers and development teams seeking to reduce cloud infrastructure expenses.

4 investors

InPharmD is a medical literature research platform that analyzes published studies to answer clinical pharmacology questions, specifically focused on adverse drug reactions and medication safety.

3 investors

Bureau provides fraud prevention and identity verification technology for digital transactions, serving financial institutions and businesses. The platform offers payment fraud detection, account takeover prevention, age verification, and KYC compliance solutions.

1 investor

Jetdocs is a ticketing and workflow management platform that integrates directly with Microsoft Teams and Slack, enabling organizations to build customizable approval processes and request workflows within their existing messaging infrastructure.

2 investors

Jiga operates a global network that manufactures custom parts and components for hardware companies, including CNC machining, sheet metal work, injection molding, and 3D printing services. The company serves high-performance hardware teams building products like rockets, drones, data centers, and robotics.

4 investors

JoinSub operates a platform that connects Indian small and medium retailers with customers through subscription-based loyalty programs, serving businesses across food service, salons, fitness, and other local service sectors.

1 investor