Y Combinator Fall 2026 (F26) Companies

Agent 37 provides persistent, pre-configured sandboxes for running AI agents such as Claude Code and Hermes, retaining files, code, and settings between sessions. It offers usage-based compute billing, single-command backend setup, and connections to tools like Slack, Gmail, and GitHub for developers deploying autonomous agents.

1 investor

Antimattr is building voice-first interfaces focused on memory and voice productivity, positioned as an ecosystem of products for natural human-machine interaction. Its first product, Project Mnemosyne, is scheduled to begin shipping in Q4 2026.

1 investor

Antropi Robotics develops autonomous CNC factories that automate machining processes to accelerate hardware production. The company operates in the industrial robotics and manufacturing automation sector.

1 investor

Applied Kinetics develops AI agents that manage supplier coordination for energy and data center construction projects, tracking equipment approvals, delivery dates, and delays. It serves project teams building out energy and data center infrastructure.

1 investor

Asakana uses AI to convert restaurant orders sent by email, text, and photo into entries in a food distributor's ERP system, flagging unclear items for human review. It serves food distributors, currently seafood distributors in the US, as an order-entry automation tool.

1 investor

Aviern develops fixed-wing unmanned aircraft that launch, fly, and land autonomously from unattended docks to inspect infrastructure corridors, using onboard perception to detect leaks, encroachments, and vegetation risk. Sold as a per-mile service starting with regulated pipeline patrol, it serves operators of pipelines, power grids, rail, borders, and military bases in the geospatial intelligence and infrastructure monitoring sector.

1 investor

Ascii offers preconfigured Ubuntu cloud virtual machines, called boxes, that come with a desktop, browser, common programming languages, Docker, snapshots, and management tools via CLI, SDK, and API. The service is aimed at running AI agents at scale for tasks such as coding and knowledge work including legal, research, reporting, and auditing.

1 investor

Buildbox is a platform that detects failed user journeys in AI agents that pass their evals but still fail to help users complete tasks, ranking these failures by business impact. It ties agent failures to outcomes and tests alternative agent behaviors against the same customer task before release.

2 investors

ByteAsk provides an AI coding agent for C and C++ that builds, debugs, and tests each code change with the actual toolchain to verify it works. It runs from the terminal or within editors like VS Code, Neovim, and Emacs, offers an on-premises option, and targets developers working on systems such as trading platforms, automotive software, chips, and operating systems.

1 investor

Capveon is an AI platform that reads public-record sources — federal, state, and local budgets, board minutes, capital plans, and portals like SAM.gov, USAspending, and Grants.gov — to surface public-infrastructure work before an RFP posts. It serves government contractors and manufacturers, carrying pursuits from early demand signals through bid/no-bid qualification, competitor analysis, price-to-win, compliance review, and proposal drafting.

1 investor

Collar is an AI agent for investment deal teams that automates the deal funnel — sourcing deals against a firm's thesis, ingesting datarooms, running due diligence, sending chaser emails, and drafting financial models, IC reports, and memos while leaving the final investment decision to the user. It serves individual investors, private market firms, and asset managers, running inside the firm's own cloud on SOC 2 Type II and ISO 27001 certified infrastructure.

1 investor

Covera builds ready-to-use AI agents for insurance brokers and captive agents that automate policy servicing tasks such as document intake, quoting across carrier portals, coverage comparison, claims handling, and collections. The agents integrate with agency management systems, CRMs, email, and storage, while keeping binding, pricing, and advice under human review.

1 investor

DeepMark embeds a machine-readable identifier directly into AI-generated voice audio that persists through phone calls and file changes, linking to a trust record that lets recipients verify the speaking agent's identity in real time. It serves banks, call centers, and other parties handling AI voice interactions as an authentication layer.

1 investor

Degla provides a natural language platform for coordinating autonomous drone fleets for search and rescue, emergency response, infrastructure inspection, and critical field operations. The system automatically plans missions, assigns aircraft, and adapts to real-time conditions without requiring flight plans or specialist training.

1 investor

Deploy develops the software and integration layer between AI models and physical tasks to put general-purpose robots to work. It serves businesses across a range of industries that want to apply robots to real operational tasks.

1 investor

Dreamscale Labs operates a cloud inference platform that lets robotics developers run physical AI models remotely rather than on hardware-limited on-robot GPUs, delivering real-time latency. The company serves the robotics and AI infrastructure market.

1 investor

Forward packages borrower financials and loan requests into structured, lender-ready credit opportunities, presenting deal terms such as facility size, tenor, pricing, and covenants. It serves lenders and borrowers involved in debt financing and commercial lending.

1 investor

Frontrunner is a platform for building AI agents that handle go-to-market tasks such as researching accounts, finding prospects, running campaigns, updating CRMs, and qualifying inbound leads. It connects to a company's existing systems and is aimed at sales and revenue teams.

1 investor

GodHands provides infrastructure that allows AI agents to interact reliably with web browsers and desktop applications, including legacy systems that lack APIs, by combining deterministic execution with visual recognition rather than relying solely on vision-based methods.

1 investor

Halmos Labs provides automated biotech research and development, running experiments and simulations that address questions from wetlab experiment design through cancer vaccine manufacturing. It serves biotech and pharmaceutical research teams.

1 investor

Hemlock builds a wearable device, the Bracelet, that captures force-labeled human manipulation demonstrations from everyday work to create training datasets for robotics foundation models and embodied AI.

1 investor

Herdr is a background server runtime that keeps AI coding agents' terminal sessions alive across disconnects, closed lids, and restarts, letting developers reattach from any device. It works with existing agent CLIs such as Claude Code, Codex, Cursor, opencode, and Grok, running as a single binary on macOS, Linux, and Windows.

1 investor

Hesper AI develops AI agents that investigate property and casualty insurance claims, reading claim files to detect tampered documents, verify facts, check coverage, flag inconsistencies, and generate audit-ready case files. It serves claims and special investigations teams at insurance carriers, managing general agents, and third-party administrators.

1 investor

Hickory & Company builds AI-driven compliance and Bank Secrecy Act (BSA) tools for banks and fintech companies. It operates in the regulatory technology sector, serving financial institutions with agentic compliance software.

1 investor