Y Combinator Summer 2026 (S26) Companies

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.

1 investor

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.

1 investor

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.

1 investor

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.

1 investor

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.

1 investor

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.

1 investor

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.

1 investor

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

Executor is a tool that normalizes API integrations from different protocols (MCP, OpenAPI, GraphQL, or custom) into a single uniform tool shape, letting AI agents call any tool through one interface with a sandboxed TypeScript runtime. It targets developers and teams building agent-based applications, offering per-user credentials, call tracing, and safety guardrails for destructive actions, available as cloud, desktop, and CLI options.

1 investor

An applied AI research lab that develops world models enabling agents to simulate physical environments with high-fidelity reconstruction, using technology derived from autonomous vehicle systems.

1 investor

Fabraix develops automated security testing software that probes AI agents for vulnerabilities using adaptive attack techniques, enabling companies to continuously validate the safety of customer-facing AI systems without manual penetration testing.

1 investor

Floracene provides independent surgery centers with software to identify lower-cost clinically equivalent orthopedic and spine implants based on their existing manufacturer contracts. The platform helps physician-owners reduce implant costs by presenting alternative options that meet clinical requirements for specific procedures.

1 investor

Florin is a private financial membership offering accounts, cards, and treasury services.

1 investor

FlowManual is a back-office platform for construction contractors that analyzes bids, contracts, vendor quotes, and invoices to identify scope, price, and exclusion changes before work begins. It flags discrepancies on exact contract lines with cost impact rankings to prevent costly oversights during project execution.

1 investor

GAMGEE develops personalised mRNA cancer vaccines for dogs, created from the animal's own tumour tissue to help its immune system fight the cancer. The company manages the full process end to end—from diagnosis and tissue sampling with the pet owner's vet, to genomic analysis and treatment delivery via veterinary oncologists—and is currently running clinical trials in Australia while accepting applications globally.

1 investor

GitCafe is a git forge for hosting code, reviewing changes, and shipping software, including its own git implementation and a first-party CLI for managing pull requests and credentials. It is aimed at software developers and offers free private repositories during its beta.

1 investor

Glen provides a shared source of truth platform where teams and agents access and contribute to consistent information, reducing contradictions and enabling fact-based decision-making across different departments.

1 investor

Graphify is an open-source, on-device tool that maps a code repository into a local knowledge graph (graph.json, graph.html, GRAPH_REPORT.md) using tree-sitter grammars, letting AI coding assistants query real paths through the code instead of grepping. It installs as a skill across 17 assistants (including Claude Code, Cursor, Copilot, Codex, Gemini CLI, and Aider) and serves the graph via an MCP server for developer teams.

1 investor

Greypoint Industries manufactures affordable autonomous interceptor systems designed to counter drone swarm attacks, offering military forces a cost-effective defensive solution that can be deployed and operated by soldiers.

1 investor

Grip Robotics develops physical-AI grippers that perceive, adapt, and manipulate objects in the waste stream, automating handling tasks in waste management that currently rely on manual labor.

1 investor

GUILD operates as a defense contractor that manufactures aerospace components while using AI systems to connect and optimize the contracting, manufacturing, and delivery process across requirements, pricing, supplier management, and compliance.

1 investor

GutGutGoose sequences a customer's gut microbiome, then compounds personalized probiotic formulas of 8-20 strains matched to their individual gut, diet, health history, and metabolic pathways, with a retest at 90 days to measure colonization. The consumer subscription product is sold in the US and Australia.

1 investor

Hardware Intelligence builds an agent-native toolchain for chip design, starting with Wave, an agentic waveform debugger for terminal use.

1 investor