Y Combinator Summer 2013 (S13) Companies

Hackermeter offers code challenges as an alternative to resume review for evaluating engineering job candidates.

1 investor

Hum provides white-label internet shopping and enrollment solutions for residential property managers and operators, allowing them to offer internet services to residents while retaining brand control and revenue.

4 investors

Kivo is a plugin that enables collaborative document editing and version control within applications like PowerPoint, allowing users to share changes without switching tools.

1 investor

Layer By Layer operated an online marketplace where users could discover, purchase, and share designs for 3D printing at home.

1 investor

Le Tote offers a subscription service that allows women to rent clothing and accessories on demand, using algorithms and customer data to personalize recommendations. The company operates across the United States and China, with its own logistics and fulfillment infrastructure.

3 investors

Lob provides software and hardware infrastructure for automating, personalizing, and tracking direct mail campaigns at scale. The platform serves businesses seeking to integrate physical mail delivery with digital marketing tools while maintaining security and print quality.

5 investors

LocalOn offers customer relationship management software designed for small businesses and merchant associations to manage customer interactions and data.

1 investor

The site publishes photography-focused articles and buying guides, including camera and lens comparisons, drone reviews, and evaluations of online photo printing and gallery services. It targets photographers, videographers, and content creators.

2 investors

Meta makes wearable glasses that overlay virtual objects and applications into the user's physical environment, controlled via hand gestures. The company aims to provide an alternative computing platform to traditional devices like computers and phones.

2 investors

One Month offers online courses in computer programming, coding, and business skills taught by industry experts. The platform provides structured learning paths in languages like Ruby, Python, JavaScript, and tools like Rails, targeting individuals looking to accelerate their careers through technical education.

2 investors

Panorama Education provides a data platform for K-12 school districts to integrate and visualize student academic, behavioral, attendance, and engagement data. The platform uses AI to help educators identify student needs and coordinate multi-tiered support interventions across 2,000 districts and 25,000 schools serving 15 million students in the United States.

4 investors

RealCrowd operates a marketplace providing individual investors with access to private equity and real estate investment opportunities, typically reserved for institutional investors. The platform offers direct investment options in operating companies and real estate deals with transparent reporting and co-investment from the sponsoring firm.

2 investors

Flipp is a mobile shopping platform that aggregates weekly digital flyers from retail stores and provides coupon clipping and shopping list features to help consumers find and save on groceries and household items.

2 investors

Senic produces smart home control devices compatible with Philips Hue and HomeKit, including wireless outdoor switches for home automation.

1 investor

SimpleLegal is an enterprise legal operations management (ELM) platform that helps corporate legal departments manage spend, matters, and vendor relationships. It provides budget tracking, matter lifecycle management, vendor performance monitoring, and reporting tools for in-house legal teams.

3 investors

SoundFocus develops audio distribution systems that enable individualized sound delivery in zoned spaces, with applications in healthcare environments including noise reduction in critical care units.

1 investor

SpoonRocket operates a food delivery service that brings prepared meals to customers within 15 minutes.

2 investors

StackMachine is a platform that runs application code (Node.js, Python, PHP, Go, and more) in secure WebAssembly sandboxes with sub-5ms cold starts, designed for teams hosting production apps, AI agents, and user-submitted code at scale.

1 investor

Standard Treasury built developer platforms—both white-labeled and co-branded—that banks could deploy to help their customers automate treasury management and accounting workflows. The company served financial institutions looking to reduce customer service costs, lower churn, and grow transaction volumes.

2 investors

Statuspage provides incident communication software that enables companies to notify users and employees about service status and incidents in real time. The platform integrates with monitoring, alerting, and help desk tools to support incident response workflows across DevOps, support, and marketing teams.

2 investors

Teleborder provides a software platform that centralizes immigration, compliance, and reporting workflows for companies employing international staff, while connecting users with a network of service providers.

1 investor

True Link provides financial cards designed to protect vulnerable individuals, particularly elderly people, from fraud and financial abuse while enabling greater independence.

8 investors

An online marketplace offering curated domain names for businesses, including premium, ultra-premium, and modern-extension domains.

1 investor

Watchsend provides analytics for iOS applications by recording their state and presenting user behavior and performance data as video playback, allowing developers to identify and diagnose issues.

1 investor