Y Combinator Summer 2021 (S21) Companies

Cloudanix provides cloud security solutions that help engineering teams identify and remediate security findings across their cloud infrastructure. The platform maps findings to identity, assets, and blast radius with associated remediation guidance.

4 investors

CloudThread helps engineering teams optimize and manage cloud computing costs as a core operational metric. The company focuses on bringing visibility and efficiency to cloud infrastructure spending.

1 investor

Coast helps software companies create interactive product demonstrations and tell their product stories more effectively. The company builds tools that enable clear, impactful storytelling for technical products.

3 investors

Cococart is a unified commerce platform for small local businesses to create online stores, manage point-of-sale, and access tools like email marketing, loyalty programs, and bookings. The platform serves restaurants, retail stores, salons, and service providers seeking to accept online orders without relying on third-party marketplaces.

1 investor

Coinrule provides automated cryptocurrency trading bots that execute buy and sell strategies on crypto exchanges without requiring coding. Users can create custom trading strategies or use pre-built rules, and run demo trades to test performance.

5 investors

CoLoop is a platform that consolidates qualitative research data from various sources and formats, allowing teams to analyze and query research across projects using AI-powered insights with human oversight. The platform serves research teams at agencies, enterprises, and independent researchers conducting market research, concept testing, and customer insights work.

1 investor

Comet Health is a digital fitness platform offering evidence-based programs for pelvic floor health, flexibility, and posture designed by physical therapists for home use. It serves women seeking rehabilitation and preventive care with guided video programs addressing conditions like diastasis recti, posture issues, and pre-natal preparation.

1 investor

Commery is a commercial real estate platform that simplifies leasing transactions in New York City for business owners, brokers, and landlords by improving transparency and communication throughout the leasing process.

1 investor

Concord Materials provides a software platform that automates procurement and financing for construction companies while connecting them with bulk material suppliers.

2 investors

Confido provides AI-powered automation for cash application, deduction management, and dispute resolution on a single platform, designed specifically for accounting teams at consumer packaged goods (CPG) brands.

3 investors

Contalink is a cloud-based accounting automation platform that helps accounting firms automate repetitive tasks such as CFDI downloads, financial report generation, and tax filing submissions to Mexico's SAT. The platform serves accountants and tax professionals in Mexico, offering features for invoice reconciliation, payroll processing, and multi-client management.

3 investors

ContraForce is an AI-powered security delivery platform for MSSPs, MSPs, and security operations teams that automates incident investigation, triage, and response within Microsoft Sentinel and Defender environments. It uses AI agents and "Gamebook" SOP enforcement to enable multi-tenant security operations at scale without proportional headcount growth.

2 investors

Coulomb.ai develops real-time battery analytics and diagnostics software for electric vehicles, addressing range prediction reliability, battery failure prevention, and degradation monitoring. The company serves fleet operators and EV manufacturers seeking to improve operational efficiency and reduce battery-related costs.

1 investor

Covie provides a platform that enables consumers to securely share their insurance policy information with third-party apps and services. The company builds interoperability infrastructure for the insurance industry, connecting consumers with multiple insurers through a single developer-friendly interface.

2 investors

Crew is a recruiting software platform that combines applicant tracking and customer relationship management features for staffing agencies and independent recruiters, with built-in sourcing tools, automation capabilities, and LinkedIn integration.

3 investors

Cumbuca operates a Layer 7 API proxy that provides regulated access to Brazil's Open Finance and Pix ecosystem without requiring intermediaries or a separate payment institution license. It offers direct integration with Banco Central's open banking APIs for payments, account data, and credit information.

3 investors

Customily is a product customizer app for e-commerce platforms that enables merchants to sell personalized products with real-time design previews. It integrates with multiple e-commerce channels and print-on-demand providers to automate order fulfillment and file generation.

4 investors

Dailybot provides team recognition and engagement tools integrated into chat platforms like Slack and Microsoft Teams, enabling teams to acknowledge and celebrate work moments in real-time as part of daily workflow. The product uses kudos, leaderboards, and value tagging to build recognition culture within organizations.

1 investor

Datlo is a market intelligence platform that provides geolocation data, business records, and demographic analytics to help medium and large companies identify expansion opportunities and execute go-to-market strategies across Brazil and internationally.

1 investor

Bonterra Deed is a platform that unifies employee giving, volunteering, grantmaking, and corporate social responsibility initiatives for organizations. The software serves enterprise companies and their CSR teams to manage global impact programs, employee engagement, and measure social impact outcomes.

5 investors

Deskimo operates a marketplace connecting employees with pay-per-use office and workspace access across Southeast Asia and the Middle East, allowing them to book nearby workspace by the minute through a mobile app.

1 investor

DigiBuild is a construction procurement platform that helps general contractors, subcontractors, and property owners source materials, reduce costs, and maintain project timelines. The company also offers AI-powered procurement scheduling and construction services across the United States.

6 investors

Digistain develops imaging technology to grade breast cancer biopsies and assess cancer recurrence risk faster and more cost-effectively than traditional methods. The company serves breast oncologists and pathologists in clinical and diagnostic settings.

1 investor

Dime generates end-to-end tests for websites automatically, allowing developers to catch bugs without manually writing test code.

1 investor