Y Combinator Summer 2026 (S26) Companies

6thSense develops tactile capture hardware and software for robot learning, providing gloves and custom sensor skins that record touch, pressure, and grip dynamics during demonstrations. The platform enables robot-learning teams to capture multimodal data aligned across RGB video, depth, IMU, and force sensors in a single integrated stack.

1 investor

83 Sciences converts unpublished experimental research data into academic papers, patents, and commercialization opportunities for research organizations. The platform captures laboratory data and uses AI to identify valuable findings within discarded experimental datasets.

1 investor

Agency Tool Company builds infrastructure for robotics teams to build, deploy, and manage fielded robots, including ATC Deploy (over-the-air software updates and fleet management for robot fleets) and ATC Build (a CI runner backed by hosted NVIDIA Jetson embedded compute). Its tools target robotics companies operating real-world robots and integrate with CI systems like GitHub Actions and GitLab CI.

1 investor

Agent FM is a desktop application for macOS and Windows that provides real-time audio narration, observability, and group chat for AI coding agents such as Claude Code, Codex, and OpenCode. It passively observes agent session output to surface decisions, risks, and blockers via live audio, identifies patterns across executions, and includes built-in voice-to-text dictation for developers.

1 investor

Agentcard enables AI agents to make autonomous payments for online purchases using cards. The company serves AI agent developers who need payment capabilities for their applications.

1 investor

Agnost AI provides observability and failure detection for AI agents in production environments. The platform analyzes real production conversations from any LLM or framework to identify failures, extract patterns, and generate fixes that teams can implement, with support for intent detection, sentiment analysis, and automatic improvements.

1 investor

Aktoria provides software to operate robots remotely, enabling data collection from robot fleets and remote deployment and monitoring of robots anywhere in the world.

1 investor

Alkera is an AI agent for data teams that automates data pipeline development, testing, and debugging across various data platforms. It provides column-level lineage tracking, end-to-end pipeline generation, and legacy pipeline modernization for enterprises managing complex data stacks.

1 investor

Alloovium builds an intelligence layer that makes knowledge trapped in construction documents answerable and accessible to contractors and teams. The platform sits atop existing tools like SharePoint to surface information from drawings, specifications, contracts and RFIs without requiring data migration.

2 investors

Almanac is a wiki system that automatically maintains documentation as developers work, reading coding sessions and updating affected pages. It integrates with coding agents and repositories to keep technical documentation current.

1 investor

Amorphic Labs builds an AI agent that generates personalized product demo videos for sales teams by researching each lead and tailoring the product's workflows and data around them. It targets sales and RevOps teams looking to create custom demos for outbound prospecting at scale.

1 investor

Amulet builds shared storage infrastructure for AI agents to save, retrieve, and collaborate on files. The platform serves as a centralized file system purpose-built for agent-to-agent and agent-to-human workflows.

1 investor

Applied Electrodynamics is building WaveSight, a hardware sensing product designed to see through walls and detect objects otherwise not visible. The company is developing consumer/industrial sensing hardware based on electrodynamics technology.

1 investor

Arbital is a decentralized market making engine for perpetual DEXes, letting users deploy automated maker-only liquidity strategies that generate volume, manage inventory risk, and participate in exchange incentive programs. It provides a configurable trade engine, multi-DEX coverage, fee-aware execution, and risk management controls for crypto traders and market makers.

1 investor

Archal provides isolated, time-bounded sandboxes containing stateful simulated environments that expose familiar REST and MCP endpoints, letting changes persist through a test run and then reset to a declared baseline. It is aimed at agent developers, connectors teams, and integration engineers who need to test agent workflows repeatedly without shared test accounts, rate limits, or dirty state.</parameter> <parameter name="founders">[]

1 investor

Assemble provides a platform for managing changes across enterprise systems, allowing developers to scope dependencies, modify logic, and validate changes across multiple platforms from a single interface.

1 investor

Async deploys specialized AI agents within existing business systems to help organizations adopt and integrate artificial intelligence into their workflows. The company targets businesses seeking to realize concrete returns on AI investment through process redesign and implementation.

1 investor

AtlasDiscovery develops foundation models of patient drug response trained on pre-clinical and clinical data to improve drug trial design and success rates. The company serves pharmaceutical and biotech firms by predicting human drug responses and enabling drug rescue and development in the biotech industry.

1 investor

Atlia is a full-service short-term rental property management company that handles guest communication, cleaning, maintenance, pricing, and owner reporting for a flat 10% fee. It serves residential short-term rental owners, combining professional operators with AI software, with staffed operations in Fort Lauderdale and San Diego.

1 investor

Ato Marine builds floating offshore platforms for high-performance computing and AI data centers, using standalone power generation and closed seawater cooling for location-agnostic deployment. The units are constructed in shipyards, towed to site, and moored together, with power supplied by adjacent vessels running on natural gas and, later, compact marine reactors.

1 investor

Avoca provides an operational intelligence and automation layer for radiology clinic networks, handling patient calls, referrals, and bookings across channels 24/7 and integrating with existing RIS systems. It manages the patient journey from referral to results to help radiology providers capture demand, retain patients, and scale operations without adding headcount.

1 investor

Axelrod provides operational management software for boutique, independent, and luxury hotels and resorts, coordinating daily operations across guest, room, team, and ownership functions within existing systems.

1 investor

Baud Labs designs specialized AI chips that reduce the computational cost and power consumption of training and serving large language models by replacing multiplication-based arithmetic with addition-based operations. The company provides both custom silicon and a PyTorch-compatible compiler to enable organizations of all sizes to run AI workloads more efficiently.

1 investor

Belvedir provides a platform for training and deploying custom AI models with private hosting and continual learning capabilities. The platform enables companies to collect production data, create training datasets, fine-tune models using reinforcement learning, and improve AI systems in feedback loops controlled by the customer.

1 investor