Founders Directory LogoFounders Directory

Discover the next generation of startups.

A curated directory of high-growth companies backed by the world's most prestigious venture capital firms.

858Companies

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CareMessage logo

CareMessage

YCombinator

Patient engagement for low-income populations

CareMessage is the technology non-profit building the largest patient engagement platform for low-income populations in the United States. Powered by the Health Equity Engine™, the platform enables organizations to combine messaging, data, and interoperability to increase access to care, improve clinical outcomes, and address social drivers of health. With 20 million patients reached since 2013, CareMessage is the only patient engagement solution proven to improve health equity at scale. The team, many with lived experiences in these communities, leverages a nonprofit model to reinvest revenue into impact. CareMessage is the partner of choice for organizations committed to advancing health equity.

Austin, TXY Combinator LogoWinter 2014ActiveHealth TechDigital HealthAustin
Carrot Labs logo

Carrot Labs

YCombinator

AI Cost Management: Track and attribute AI spend across every provider

The problem: AI has quietly become one of the largest and fastest-growing line items for companies. Spend is scattered across a dozen provider consoles that each show one number at the end of the month and nothing about why it moved. There's no unified view, and no way to trace a dollar back to the customer, feature, team, or even the pull request that caused it. Which customers are unprofitable once you subtract their AI costs? Which feature is quietly burning your Anthropic budget? Is this week's spike a runaway loop or real growth? How much did that AI-written PR actually cost to ship? Today teams reverse-engineer answers by exporting CSVs from each provider and stitching them together in a spreadsheet, and by the time they do, the money is already spent. What SuperPenguin does: SuperPenguin tracks AI spend across 14 providers (OpenAI, Anthropic, Google Gemini, Deepgram, ElevenLabs, AWS Bedrock, Azure, Modal, Cursor, OpenRouter, and more). * Zero-code setup: connect an API key and costs sync automatically with model-level breakdowns, trends, and forecasts * Per-request attribution: add two lines with our Python or TypeScript SDK to tag every AI call by customer, feature, team, or environment (or any other metadata). * AI coding cost per PR: connect Cursor to see engineering spend attributed to each pull request, repo, and developer, so you know what it actually costs to ship. * Alerts on budget thresholds and spend anomalies, delivered to Slack, email, or Discord. Most teams are set up in under five minutes. We help companies see where their AI money goes and whether it's worth it.

San FranciscoY Combinator LogoWinter 2026ActiveAIOpsArtificial IntelligenceFinOpsB2BAISan Francisco
Cascade logo

Cascade

YCombinator

Distilling Proprietary Intelligence

Cascade helps companies take their proprietary data and workflows to align models for their use cases, resulting in higher throughput intelligence that works better, faster, and cheaper.

San FranciscoY Combinator LogoWinter 2026ActiveSan Francisco
Casetext logo

Casetext

YCombinator

We make the world's laws free and understandable.

Casetext, the most widely used A.I. legal research technology, has been adopted across the legal market from the largest Am Law 100 law firms to solo practices. Its award-winning technology offers both conventional search functionality and its CARA A.I. powered contextual search, focuses on the context of your research to help you find on-point authorities faster. Founded by a team of former litigators from top law firms, as well as Ph.D. data scientists and leading A.I. engineers, Casetext helps legal researchers find the best cases, faster, including many that they would otherwise miss. For more information, visit www.casetext.com or contact our team at contact@casetext.com.

San FranciscoY Combinator LogoSummer 2013AcquiredArtificial IntelligenceLegalSan Francisco
CellType logo

CellType

YCombinator

The agentic drug company. We simulate human biology.

CellType is building an agentic drug company. AI agents that run the full drug discovery pipeline on top of biological foundation models that simulate human biology. Our core technology, developed with Google DeepMind, has already discovered and validated a new cancer treatment signal. We’re working with Top 10 pharma.

New York City, NYY Combinator LogoWinter 2026Active
CentralComs logo

CentralComs

YCombinator

AI Agents for Property Management

CentralComs is building AI Agents for property managers that tracks every maintenance call, chases every open ticket, and keep owners/tenants/vendors updated, so nothing falls through the cracks and operations never stall. These agent work directly inside AppFolio, Buildium, Yardi and your existing stack, making real-time decisions and resolving multi-step workflows without handoffs.

San FranciscoY Combinator LogoSpring 2026ActiveSan Francisco
Cerenovus logo

Cerenovus

YCombinator

A knowledge company

Cerenovus is a company brain. We aggregate every kind of file a company produces — documents, PDFs, emails, Slack messages, spreadsheets, meeting notes — and convert them into a single markdown knowledge graph with native AI-agent integration. A company's information becomes uniformly readable both by humans and by the AI agents working inside the graph. On top of that foundation, Cerenovus maps the company as a system, drawing connections between the people, processes, and tools that make up real workflows. From that systems map, it infers where operations are inefficient and how to improve them. In practice, this tool will help executives make better decisions. Whenever a leader has to act on a question — how to restructure a team, whether to keep a vendor, or where handoffs between teams are breaking down — Cerenovus will give them an evidence-backed answer in minutes rather than weeks. Today, that work is done by consultants, by internal analysts, or by the executive asking around informally. Each of those approaches is slow, partial, and goes stale the moment it is delivered. Cerenovus produces the same answers faster, at a fraction of the cost, and keeps them live as the company evolves.

San FranciscoY Combinator LogoSummer 2026ActiveAIOpsArtificial IntelligenceB2BSearchAISan Francisco
Chaldal logo

Chaldal

YCombinator

Chaldal.com is an online shop based in Dhaka, Bangladesh. It is a service rooted on the idea that shopping for necessities should not be a burden. At Chaldal, we believe that time is valuable to our fellow Dhaka residents, and that they should not have to waste hours in traffic, brave the weather and wait in line just to buy some eggs – which is why we deliver everything you need right at your door-step and at no additional cost! Chaldal is a work in progress, and we hope to get better over time. We are firm believers in using technology to improve Bangladesh, and we will continue to invest all our effort in pushing the boundaries of technology in this country.

Dhaka, BangladeshY Combinator LogoSummer 2015Active
Chamber logo

Chamber

YCombinator

The AIOps Agent for ML Teams

Chamber puts your AI infrastructure on autopilot, and saves your machine learning engineers hours of manual effort. Our agents continually monitor, detects failures, provide root-cause analysis, resolve issues, and optimize AI workloads and scale across clouds. It operates like an autonomous infrastructure team, helping save your research and engineers hours each day, and debugging workload performance issues. Your ML teams move faster, infra waste drops, and GPU bottlenecks disappear.

Seattle, WAY Combinator LogoWinter 2026ActiveSeattle
Char logo

Char

YCombinator

The AI notepad that knows and works for you

Char is a daily notepad that finishes your todos for you. Type a checkbox, and an agent picks it up — researching, drafting, or scheduling on your behalf. Stay in command. Char does the work.

Seoul, South KoreaY Combinator LogoSummer 2025ActiveSaaSProductivityOpen SourceAIAI Assistant
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