Y Combinator Summer 2021 (S21) Companies

Hilos provides a WhatsApp business platform for sales teams to capture leads, automate customer follow-ups, and close deals through WhatsApp messaging; it integrates with CRMs and marketing tools to increase conversion rates.

2 investors

Hirebolt provides access to a curated global network of verified engineers specializing in software, ML, data, and AI implementation, enabling companies to quickly identify and hire technical talent for building AI products. The platform offers search, evaluation, and flexible hiring options to accelerate recruiting and project execution.

1 investor

HitPay is a payment processing platform for Southeast Asian merchants that accepts cards, digital wallets, QR codes, and bank transfers across online and physical channels. It serves e-commerce, retail, hospitality, and service businesses operating in Singapore, Malaysia, Philippines, Indonesia, and other Southeast Asian countries.

2 investors

Hive Health provides tech-enabled HMO health plans for small and medium enterprises, with coverage including teleconsults, mental health, maternity, and medicine. It offers an online portal and HR dashboard for members to request Letters of Authorization, book teleconsults, view medical records, and manage member enrollment.

3 investors

Hotglue is an embedded ETL platform that enables data integration with over 600 open-source connectors, allowing companies to build and manage customer integrations at scale. It serves product teams building integration workflows and is sold to SaaS companies and platforms.

3 investors

Hudson Labs provides AI-powered analysis software for investor relations teams to monitor peer disclosures, prepare earnings Q&A, and track messaging themes. The platform serves institutional investors, buy-side firms, and public company IR departments.

3 investors

Humane Genomics develops oncolytic viral therapies designed to selectively target and kill cancer cells using engineered RNA viruses, particularly Vesicular Stomatitis Virus. The company leverages a computational platform for viral genome design and engineering to create cancer treatments with improved safety, efficacy, and manufacturing efficiency.

7 investors

Whop provides a payments platform and distribution marketplace for digital businesses. The platform offers payment processing with multiple local payment methods, buy-now-pay-later options, and a marketplace to reach 22M+ monthly active users.

1 investor

A platform that provides browser infrastructure for AI agents, including CAPTCHA solving, proxy management, and anti-bot evasion capabilities. Developers use the service to run AI agents for large-scale data collection, testing, and web automation tasks.

1 investor

An AI meeting assistant that records and transcribes meetings, organizes meeting data, and generates action items, ticket creation, recap emails, and CRM updates. Marketed to teams across functions including product, engineering, sales, HR, recruiting, and VCs.

2 investors

Hypercore provides software to track and manage syndicated debt funding sources, loan terms, and investor returns. The platform serves loan servicers and debt managers who need to monitor performance metrics across multiple lenders and capital structures.

3 investors

Hyperseed provides a no-code billing automation platform that uses spreadsheet formulas to let companies manage custom billing workflows, eliminating manual processes and reducing the need for custom engineering solutions.

1 investor

HyperTrader is a trading platform that provides cryptocurrency traders with tools for executing trades, monitoring positions in real time, and managing their portfolio with encrypted security features.

1 investor

Idemeum provides AI-powered agents that autonomously resolve IT support tickets and govern applications, privileges, and admin accounts across endpoints, combining endpoint care and endpoint control in a unified platform.

3 investors

Inai provides a payments platform that enables companies to launch, manage, and scale global payment solutions with integrations to diverse payment methods across regions. The platform is designed for e-commerce and digital businesses seeking to expand internationally while reducing engineering overhead.

5 investors

Infer provides software infrastructure for insurance agencies to manage their operations and client data.

1 investor

Infina operates a fintech platform offering yield-generating accounts and integrated investment tools for retail users in Vietnam. The platform provides access to savings products through partnerships with major financial institutions, as well as stock trading services via Finavi.

7 investors

Infiuss Health operates a decentralized clinical research platform that connects pharmaceutical sponsors with patient participants, physicians, and hospitals to conduct remote or hybrid clinical trials. The platform aims to accelerate drug development by diversifying participant cohorts and streamlining the recruitment and management of clinical studies.

7 investors

Inflow is an app-based program providing personalized coaching, strategies, and tools to help people with ADHD manage their condition. The platform combines clinical guidance from psychology experts with a supportive community, designed to make mental health support affordable and accessible for neurodiverse individuals.

2 investors

Instacrops provides farmers with a dashboard that aggregates data from IoT sensors placed in fields alongside satellite and drone imagery to generate farm health analytics. The platform helps agricultural producers in Latin America optimize crop yields.

1 investor

InstaKin helps migrant communities purchase and send goods such as medicines, groceries, and other items to family members in their home countries. The service handles both product delivery and task management for families separated by distance.

2 investors

Intellect provides mental health support solutions for workplaces and individuals, offering employee assistance programs combined with self-care platforms and coaching/therapy sessions. The company serves corporate employers and individuals seeking mental wellbeing support.

5 investors

Inversion develops spacecraft and systems to establish Low-Earth Orbit as an on-demand logistics network for rapid global transportation and defense applications. The company manufactures reentry vehicles and related hardware to enable cargo transportation across Earth via space.

10 investors

Ivella offers financial products and accounts tailored for couples at different relationship stages, including shared savings and account options designed for partners to manage money together.

3 investors