Y Combinator Summer 2021 (S21) Companies

PAYZE provides payment processing infrastructure for businesses operating in former Soviet Union countries, enabling them to accept international transactions through a single integration.

2 investors

Perfekto is a direct-to-consumer platform that delivers "imperfect" fresh produce—fruits and vegetables rejected for cosmetic or production reasons—directly from farms to customers' homes in Mexico. The service reduces food waste while offering consumers cheaper prices and fresher products while supporting farmers.

2 investors

Phykos cultivates seaweed for carbon sequestration and climate mitigation purposes.

2 investors

Pide Directo connects restaurants with delivery logistics by matching orders to available delivery providers from integrated networks, optimizing delivery speed and cost. The company serves restaurant clients in Mexico and is certified as a Top Tech Partner by Rappi.

3 investors

Pagaky is a collections management platform that automates payment reminders, reconciliation, and cash flow tracking for businesses. It enables companies to upload customer portfolios, send personalized payment notifications via WhatsApp or email, and accept payments through a network of over 17,000 cash payment points including convenience stores and retailers.

4 investors

Pillar provides a white-label digital education and engagement platform for healthcare organizations, employers, and benefits administrators to scale patient education, care coordination, and benefits communication. The platform delivers consumer-grade experiences with guided health pathways, chronic disease management automation, and engagement analytics.

3 investors

Pipekit provides management and orchestration software for Argo Workflows, helping data and engineering teams reduce the time and cost of running complex data and CI pipelines on Kubernetes infrastructure.

2 investors

Pirouette develops OnePush, a fully automatic hidden-needle auto-injector platform paired with drug programs across chronic and rescue care indications. The company is advancing clinical-stage programs in naloxone, epinephrine, promethazine, and methotrexate while scaling U.S. automated manufacturing and securing IP protection through 2045.

3 investors

Plai is an AI-powered advertising platform that simplifies campaign creation and management for brands, agencies, and creators. The company uses text-to-ad AI models to automate ad production across multiple channels, replacing complex manual processes.

2 investors

Planet A Foods develops alternative food ingredients using food technology to reduce climate impact in the food industry. The company produces ChoViva, a no-cocoa chocolate ingredient for B2B food manufacturers seeking sustainable supply chain solutions.

5 investors

Pluggy provides data connectivity infrastructure that aggregates investment portfolios from multiple brokerages and banks, delivering standardized asset position data, transaction history, and performance calculations to fintech applications.

3 investors

Portão 3 (P3) is a Brazilian fintech that issues unlimited virtual and physical cards for businesses, with real-time spending controls and category-based limits. The platform serves companies needing card issuance and expense management with global acceptance across ad platforms, SaaS providers, and international vendors.

1 investor

Positional offers an autonomous SEO agent that handles strategy, content creation, and technical SEO across multiple aspects of search optimization. The platform serves companies seeking to automate and scale their organic search marketing efforts.

3 investors

Potion creates automation and workflow solutions for beauty and personal care companies to reduce time spent on repetitive tasks. The company serves the beauty and personal care industry.

2 investors

Promakhos Therapeutics develops immunomodulatory therapies to restore immune system balance and reduce chronic inflammation in diseases like Crohn's disease, ankylosing spondylitis, and psoriasis. The company targets patients with inflammatory diseases who do not benefit from current immunosuppressive treatments.

3 investors

PropReturns operates an online marketplace where Indian businesses and individuals can buy, sell, and lease commercial properties, using data to address market fragmentation and transparency gaps.

1 investor

Protego provides chargeback management software that automates dispute processes and tracks chargebacks in real time to help merchants identify patterns in fraudulent activity and recover revenue.

1 investor

Protex AI applies computer vision and generative AI to analyze video footage from industrial sites, identifying operational patterns and safety risks in real time. The platform processes data from existing CCTV infrastructure to provide dashboards, alerts, and recommendations for factory, warehouse, and logistics operations teams.

4 investors

Pylon provides a comprehensive infrastructure management platform for water and electricity utilities that enables smart metering, reduces energy and water waste, and facilitates meter-agnostic interoperability. The platform serves utility companies globally, particularly in emerging markets, addressing challenges from energy theft and tampering to emissions reduction.

4 investors

Quest is a question-and-answer platform where professionals share career guidance through recorded audio responses, featuring practitioners from startups and established technology companies.

1 investor

Redbean is a platform where users create and interact with AI-powered characters (called Digital Pals) that understand context and emotion, remember interactions, and evolve over time. The platform allows creators to build living social worlds populated by these characters and share stories within a community remix culture.

1 investor

Reframe is a digital habit-change program that helps users reduce or eliminate alcohol consumption through science-based methods. The app provides personalized information and tools for individuals seeking to change their relationship with alcohol.

2 investors

RendaloMaq operates a digital platform for renting construction and mining equipment across Latin America. The company serves contractors and mining operators seeking faster access to machinery through its proprietary fleet management technology.

4 investors

Replo is a no-code platform for building, testing, and launching high-converting landing pages and sales funnels for e-commerce and SaaS businesses. The platform uses AI to generate pages from ad creative or images and integrates with Shopify, ad networks, and other business tools to optimize conversions.

4 investors