Y Combinator's Cloud Computing Portfolio

Bird is a cloud communications platform that connects enterprises to their global customers and enables communication between them.

TesterArmy provides an AI-powered QA platform that tests web and mobile apps via real browser runs and CI integrations.

Agency Tool Company builds software infrastructure for deploying and managing software on field robots.

PRINCEPS develops AI-native software for compliance, operational resilience, and administrative workflows in the energy sector.

Rindler develops a Model Context Protocol (MCP) platform enabling AI agents to interact reliably with websites that lack APIs.

Codag cuts coding-agent costs by optimizing large tool outputs like logs and test results so agents consume fewer tokens.

Caution provides a verifiable confidential compute platform that delivers cryptographic proof for secure and trusted workload execution.

Starcloud develops space-based data center infrastructure designed to support computing and data processing beyond Earth environments.

Thunder Compute provides GPU cloud infrastructure and virtualization technology that helps organizations maximize GPU utilization for AI.

Fly.io provides a cloud platform for deploying, running, and scaling applications, databases, and AI workloads globally.

Sazabi provides an AI-native observability platform with autonomous alerts, conversational debugging, and coding agent integrations.

Arctic Health is a credentialing platform that provides AI-enabled credentialing and payer enrollment services for healthcare organizations.

InLoop Robotics develops bimanual robotic systems and RaaS solutions for manufacturing, assembly, and logistics workflows.

Playabl is an AI-powered, no-code platform for creating web games and interactive experiences by chatting in plain text.

Cohesion develops AI-driven research tools that automate public equity investment workflows for institutional investors.

Clawvisor provides a credential-vaulting gateway and authorization layer for AI agents accessing external services.

Limrun provides remote Xcode, iOS simulators, and Android emulators that enable cloud-based AI agents to build and test mobile apps.

Prototyping.io provides an AI-driven platform to analyze CAD designs and manufacture custom mechanical parts.

ReasonBlocks provides AI infrastructure and developer tools for optimizing autonomous agent workflows.

Lightsprint provides an AI-native product development platform for teams to plan, build, and ship software on a shared codebase.

Minicor develops an AI-powered RPA platform for automating workflows in legacy desktop and enterprise applications.

Andustry operates an AI-native industrial brokerage that sources machines, parts, and equipment for manufacturers.

Simbie AI provides AI voice agents that automate patient calls, scheduling, intake, and clinical documentation for healthcare practices.

Replit provides a cloud-based development platform that enables users to write, run, and deploy applications in browsers.

AbInitio Bio develops AI foundation models for biologic drug manufacturability and process optimization.

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Zibra Labs provides cloud-based high-performance compute clusters and APIs for large-scale AI and quant workloads.

PLAN0 AI provides an AI-powered preconstruction cost intelligence platform for real estate and construction stakeholders.

Pairio provides AI-powered maintenance software that helps industrial teams document work, search technical documents, and analyze data.

StableBrowse provides browser infrastructure and tools that let AI agents navigate and automate workflows on dynamic websites.

Archil is a software company that develops cloud storage software that enables organizations to access and manage large datasets.

Kura serves as a DevOps copilot, aiding software teams in the management of their cloud infrastructure.

Cumulus Labs develops software for creating, running, and managing virtual labs and hands-on training environments.

Klaus AI is an agentic AI company that offers personal virtual assistant on cloud infrastructure.

ProjectX is reimagining the future of computing with the first it's kind web-based compute platform "Infinity".

Depot is a build acceleration and developer productivity platform that speeds up container builds and GitHub Actions runners by up to 40x.