Y Combinator Summer 2026 (S26) Companies

Daqstra builds software infrastructure for observability and orchestration of physical systems, enabling teams to manage data acquisition, configuration, and real-time operations from test environments and hardware deployments. The platform serves engineering teams operating test cells, propulsion systems, and other physical infrastructure that require unified data management and monitoring.

2 investors

Datoric sources and licenses ethically obtained voice, video, and multimodal training data for frontier AI development, working directly with consented, compensated contributors such as native speakers and domain experts. Each dataset carries verifiable provenance and clean licenses aimed at AI model teams building multimodal systems.

4 investors

Dawn Industries builds VIM, a system that connects to industrial automation cells—including PLCs, robots, CNC machines, and sensors—to diagnose faults, stage operator-approved fixes, and detect part deviations shortly after machining. It serves manufacturers looking to reduce equipment recovery time and fault-related costs.

1 investor

Decawork provides an operating layer for IT teams to deploy, govern, and maintain AI agents running across a company's systems. It handles agent identity, scoped access to internal systems, spending caps, approval gates, and audit records so agents stay controlled from onboarding through audit.

4 investors

DeepReach runs a data-collection network where individuals ("Data Partners") wear a shipped device to record real-world operation data and get paid per accepted task. The captured data supports AI/machine-learning training use cases, with contributors operating across dozens of countries.

5 investors

Denta embeds AI engineers into dental organizations to automate business operations and administrative processes using AI. The company serves dental practices and healthcare organizations seeking to reduce dependence on traditional software systems.

1 investor

Derya is an AI-native freight forwarder that uses AI agents to handle sales, pricing, and operations tasks such as sourcing deals, generating leads, quoting, and coordinating carriers. It serves importers/exporters, freight forwarders, and carriers/shippers, backed by a global partner network for logistics and supply procurement.

2 investors

Dialogus builds voice agents for enterprises that handle customer conversations across phone and integrated systems. The platform detects conversation turns, intent, and urgency while constraining agent actions within workflow policies, CRM data, and approved tools, producing auditable transcripts and handoff trails.

2 investors

Dipole Labs develops photonic (optical) hardware intended to serve as the optical layer for AI and quantum computing infrastructure, aiming to overcome the physical limits of silicon in speed, density, and efficiency. The company targets AI and quantum infrastructure providers.

6 investors

Dock is a collaborative workspace where users create teams of specialized AI agents that coordinate with one another to carry out departmental work. It is aimed at companies looking to automate and manage operational tasks across functions.

4 investors

Donkey is a trading company that sources manufactured goods directly from Asian factories for US importers, handling customs clearance and duty payment. The service quotes products at landed, delivered prices with duty calculated on the factory invoice rather than a middleman's padded markup.

3 investors

DREAM is an AI-powered asset condition monitoring system that automatically photographs vehicles and equipment passing through a gate, builds 3D reconstructions, and detects damage over time. It serves operators of rental fleets, equipment yards, and similar sites managing passenger cars, vans, trucks, and heavy equipment.

3 investors

Earendil develops advanced vision and targeting systems for military and tactical operations, including augmented reality soldier systems, autonomous drone interceptors, and thermal sight products designed for situational awareness and threat detection in contested environments.

2 investors

Edgerun develops a lightweight, wearable exoskeleton system (under 10 lb) that reduces the physical effort of carrying loads, running on field-swappable drone batteries for 12+ hours. The product is designed in Silicon Valley with input from front-line users, indicating a focus on defense or field-operations applications.

1 investor

EdotEnv is a quant research lab building reinforcement-learning environments at scale from financial market data, designed to increase in difficulty so AI agents can continuously improve. It works with frontier AI labs and academic groups on research harnesses, evaluation benchmarks, and post-training environments toward recursive self-improvement.

4 investors

Edviro builds AI-powered energy management software for building operations teams, helping them identify and act on energy waste across their facilities. The platform integrates energy data from multiple sources to deliver actionable insights and verify savings for schools and other building operators.

2 investors

EGO is a personal context layer and "AI passport" that stores a user's preferences, history, relationships, and identity so it travels across the AI apps and assistants they use, letting people avoid reintroducing themselves each time. It offers privacy controls over what each application can see and includes an optional public profile page (at ego.ist/i/you) for sharing interests and links.

1 investor

Ekho provides prescriptive intelligence for global freight, delivering PO-level reroutes, carrier alternatives, and booking windows into a customer's TMS ahead of disruptions. It serves freight teams managing ocean shipping lanes, integrating via read-only API with systems such as CargoWise, SAP TM, Oracle OTM, and Descartes.

2 investors

Ekpa is a portfolio analysis and research tool that aggregates stock holdings from multiple brokerages into a single dashboard and provides research-driven insights based on users' actual positions, including analyst ratings, SEC filings, and news. The platform serves individual retail investors seeking consolidated portfolio visibility and education-focused research without generating trade recommendations.

1 investor

Stratum is an AI platform that reads government application filings, checks them against agencies' existing review rubrics, and routes each step to the model that reviews it most accurately, clearing adjudication backlogs while a human officer still makes the final decision. It targets US government agencies handling filings such as patents, FDA registrations, SEC filings, building permits, passports, and veterans' benefits.

1 investor

Enact provides post-training data for robotics and physical AI models, running policies on tasks to find failure states and generating targeted demonstration and recovery datasets. It also evaluates model performance in-house to confirm the data resolves those failures.

2 investors

Erinys launches and operates AI-native law firms, providing lawyers with the software, support staff, back office, billing, compliance, working capital and growth infrastructure needed to run a turnkey firm. It targets practicing lawyers who want to start their own firm while retaining biglaw-level pay and equity ownership.

3 investors

Ethos Space develops technology to build and operate spaceports and infrastructure on the Moon using in-situ lunar resources, including construction material (Durandal), onsite propellant production (Prometheus), and materials for space-based data centers. The company also publishes research reports on lunar and planetary resources such as silicon, water, critical minerals, and helium-3.

9 investors

Evergrove Labs builds voice AI agents purpose-built for the workers' compensation industry, running end-to-end phone calls and handling data retrieval and entry in systems of record to replace contact center staff. The agents run in parallel across claims workflows and connect to claims management systems, Salesforce, and custom systems of record.

1 investor