Y Combinator Spring 2026 (X26) Companies

Superset orchestrates 100+ coding agents in parallel across different AI coding tools. It provides agent-agnostic infrastructure for developers to run multiple AI agents simultaneously on code tasks like feature development, bug fixes, and refactoring, with isolated Git worktrees and IDE integration.

2 investors

Surtr develops ParallaxOS, an open operating system for counter-unmanned aerial systems (counter-UAS) and command-and-control operations in Western defense. The platform integrates sensors and effectors from multiple hardware partners without proprietary lock-in, enabling real-time data fusion and AI-driven decision-making for military and defense operators.

2 investors

Synphony provides AI and robotics software for building and deploying robotic systems in real-world environments, serving robotics teams and operators who need to integrate autonomous systems into physical workflows.

2 investors

Taiga provides end-to-end medical billing services for healthcare practices, automating the billing workflow from EHR data extraction through reconciliation. The platform integrates with multiple electronic health record systems and handles claims processing across all major payer types including commercial carriers, Medicare, Medicaid, and specialty networks.

1 investor

TakeCareOS is a care management platform that provides rostering, CRM, shift scheduling, messaging, timesheets, invoicing, and compliance tools for disability, aged care, and home care agencies. The platform includes AI agents that automate administrative tasks like form conversion, documentation drafting, and timesheet processing.

1 investor

Tasklet is an AI command center that enables teams to build, share, and run AI agents without coding. It provides centralized management of connections, credentials, and API integrations while offering secure cloud compute for agent execution, browser automation, and custom app generation.

3 investors

tday automatically records product demos and generates launch content including videos and graphics when software releases ship, capturing the live product in action and re-recording on every update. The platform serves software development teams who need polished demo videos and launch materials without manual video production.

1 investor

Tenet Industries develops industrial systems and platforms, with product offerings including Midsummer and TenetTX. The company's specific focus and customer base are not clearly stated on the homepage.

2 investors

TesterArmy provides AI-powered automated testing for web and mobile applications, performing browser checks and generating bug reports with screenshots and recordings. It serves development teams and QA professionals who need to validate product functionality across apps and websites.

1 investor

The Company Company develops software agents and infrastructure for operating businesses, serving companies that want to automate their operations.

1 investor

An AI entity that independently launches and operates internet-based businesses without human intervention.

3 investors

Tolmo develops autonomous security agents that continuously monitor and identify vulnerabilities in production applications at cloud scale. The platform serves security teams and engineering organizations to automate runtime security operations.

2 investors

Totalis builds a derivatives platform layered on top of prediction markets, allowing users to trade derivative contracts tied to market predictions.

1 investor

transload is a computer vision platform that uses existing IP security cameras to automatically measure and dimension pallets, parcels, and shipments at loading docks, integrating measurements directly into warehouse or transportation management systems without requiring new hardware or workflow changes.

1 investor

Trellis automates operational coordination for short-term rental property managers, including cleaning schedules, maintenance dispatch, guest communication, and vendor management. The platform enables operators to scale their portfolios while maintaining service quality and guest experience.

1 investor

Two Labs develops a modular humanoid robot platform designed for builders to collect data, train autonomous skills, and deploy robotic systems.

1 investor

Uno develops a mobile wallet application for iPhone that optimizes credit card rewards and can function as a default contactless payment method. The company targets consumers seeking to maximize points across their card accounts through automated wallet features.

1 investor

Userlens is an AI-powered customer success platform that predicts account churn and monitors user adoption metrics across a company's entire customer base. It integrates with product analytics, CRM, and data warehouse tools to provide customer success teams with account-level insights on usage trends, feature adoption, and at-risk accounts.

1 investor

ValCtrl operates a prediction market platform where users can formulate custom beliefs about future events, which the system then structures, prices, and enables trading on. Unlike traditional prediction markets limited to pre-defined questions, ValCtrl uses modeling to map user inputs to market signals and generate prices for claims that would otherwise be unavailable to trade.

1 investor

Voquill is a voice reporting solution for pathologists that converts spoken case descriptions into structured, finalized pathology reports in real time. The software integrates with existing laboratory information systems and learns individual pathologist conventions and templates to reduce editing time.

1 investor

Walter is a document processing and data extraction platform that reads PDFs and emails, validates data against customer catalogs, and writes validated information directly into ERP systems. It serves enterprise customers for tasks like sales order processing and bill of material analysis.

1 investor

Wato is a shared AI workspace platform that provides centralized memory, tools, workflows, and cloud sessions for AI agents across an organization. It integrates with MCP-compatible clients and allows teams to manage permissions, reuse AI skills, and maintain audit trails across distributed agent work.

1 investor

A wealth management platform built with AI capabilities designed for financial advisors and wealth managers.

1 investor

WithAI provides an AI platform called Multiplier that helps asset managers and investment firms automate research and decision-making by leveraging frontier AI agents that operate securely on clients' own cloud infrastructure. The platform integrates with existing workflows, consolidates disparate data sources, and enables analysts to spend more time on insight generation rather than information gathering.

2 investors