Y Combinator Summer 2021 (S21) Companies

Ivy Homes purchases residential properties directly from homeowners in India by providing instant purchase offers based on a proprietary valuation model, then renovates and resells the homes through partner channels.

2 investors

Jabu operates a digital wallet platform for businesses in southern Africa to conduct transactions in markets with limited banking infrastructure and high cash usage.

4 investors

Jestor is a no-code workflow automation platform that routes approvals, purchases, reimbursements, and back-office processes for companies. It allows teams to build and customize workflows using AI, native forms and tables, and integrations across finance, procurement, operations, and service management.

2 investors

Jovian offers beginner-friendly online courses in programming, data science, machine learning, and web development, with a focus on practical, hands-on learning using Python and related tools. The platform serves aspiring developers and data professionals through structured courses with lessons, assignments, and cloud-based project environments.

2 investors

Jupe designs and manufactures off-grid dwellings for landowners seeking to activate their properties through hospitality or residential use. The company creates prefabricated, solar-powered living spaces produced in the United States with an emphasis on sustainable design and durability.

2 investors

KaiPod Learning operates a network of microschools that provide personalized, small-group education tailored to individual student needs. The company supports educators in launching and operating these schools while serving families seeking alternatives to traditional education.

4 investors

Kalam Labs designs and manufactures high-altitude hydrogen-based unmanned aerial vehicles and stratospheric platforms for military and defense applications, including surveillance systems, autonomous weather platforms, and stealth strike swarms capable of operating at 100,000+ feet. The company serves the Indian armed forces with edge-of-space aerial warfare technology developed and manufactured in India.

2 investors

Kapacity.io is a distributed energy resource management platform that helps electricity retailers optimize heat pump flexibility and reduce grid strain. The company enables retailers to access behind-the-meter device data to improve customer relationships and grid management in European electricity markets.

1 investor

Karbon Card provides financial services for cross-border payments, including foreign payment collection and sending, corporate cards, and cloud billing optimization. The platform serves freelancers, importers, exporters, e-commerce businesses, and marketplace resellers globally.

8 investors

Kaya helps marketing teams analyze and understand competitors' advertising strategies across Google, Meta, and LinkedIn. The platform gathers, organizes, and analyzes competitor ads to help teams build more effective campaigns.

1 investor

Keyri provides fraud prevention and authentication software that uses device fingerprinting and biometric methods to help companies detect fraudulent activity and verify user identities across mobile and web applications.

1 investor

Kindamagical provides a platform for users to quickly record and edit product demonstrations into GIF format, replacing the time-consuming process of traditional video editing tools.

1 investor

FODZYME develops an enzyme powder supplement that breaks down FODMAPs in food, particularly fructans found in garlic, onions, and wheat, for people with digestive sensitivities. The product targets individuals who need to manage FODMAP intolerance to improve their diet flexibility and quality of life.

1 investor

Kodda provides structured health and lifestyle programs designed and guided by professionals to help users achieve sustainable personal wellness improvements.

2 investors

Kodex provides a compliance management platform for handling law enforcement data requests and subpoenas. The software helps compliance teams centralize requests, automate workflows, detect suspicious patterns, and generate regulatory reports to prevent fraud and compliance violations.

3 investors

Konta.com provides tax filing and accounting software for small businesses operating in Mexico and Latin America.

4 investors

Koshex provides financial analytics and investment recommendations to Indian millennials, helping them optimize savings and investment decisions through data-driven insights.

2 investors

Kurios provides training and strategic coaching to help organizations build digital and AI capabilities across teams. The company connects enterprise clients with global experts from companies like Uber, Amazon, Netflix, and academic institutions to accelerate digital transformation.

5 investors

Lago is an open-source billing platform that enables companies to build and manage their billing infrastructure with transparency and control. The platform serves tech companies that need flexible billing solutions without the limitations of third-party black-box systems.

4 investors

Lapzo is an AI-powered talent development platform that maps competencies, personalizes learning plans, and evaluates employee performance for organizations. The platform combines skills assessments, personalized development pathways, and performance management tools to align employee growth with business objectives.

4 investors

Lariat provides data quality monitoring for data engineering teams, detecting data issues before they reach downstream users by tracking metrics across raw data and finished data products.

1 investor

Laudable extracts customer testimonials and case studies from recorded calls via integrations with Gong, Chorus, or other call recorders, then produces edited videos and marketing materials for demand generation.

1 investor

Legion Health provides online psychiatric care and medication management for mental health conditions including ADHD, depression, anxiety, and bipolar disorder through board-certified providers via telehealth. The service accepts most major insurance plans and offers virtual appointments with quick scheduling and prescription delivery to patients' pharmacies.

3 investors

LemFi provides financial services for immigrants relocating globally, enabling them to move money and access financial products across borders. The company serves immigrants and people with cross-border financial connections in markets including the UK, US, and Canada.

10 investors