# YC Winter 2026 companies Canonical: https://mudpie.ai/yc/winter-2026/ Author: Ali Abouelatta Published: 2026-09-19 Updated: 2026-09-19 A selected Winter 2026 YC company sample organized for founders comparing adjacent products, buyers, and public evidence. ## [/dev/fast](https://mudpie.ai/companies/dev-fast/) Open-source code review for understanding architecture, diffs, and agent trajectories. Industry: B2B ## [Constellation Space](https://mudpie.ai/companies/constellation-space/) Constellation Space provides a telemetry, forecasting and policy-controlled action layer for mixed-vendor satellite fleets. Industry: B2B; Analytics ## [21st](https://mudpie.ai/companies/21st/) 21st.dev pairs a large React component registry with an Agents SDK for shipping persistent frontier-agent experiences to users. Industry: Developer Tools; Artificial Intelligence; Frontend Infrastructure ## [Balance](https://mudpie.ai/companies/balance/) Balance keeps SMB books current with AI agents and named accountants who own the judgement and sign-off. Industry: B2B; Finance and Accounting ## [Autumn AI](https://mudpie.ai/companies/autumn-ai/) A live public-web research and enrichment layer for teams that need changing signals and provenance rather than static database rows. Industry: B2B · Infrastructure ## [AutoSitu](https://mudpie.ai/companies/autositu/) The AI operating system for the built world Industry: Real Estate / Construction ## [Sitefire](https://mudpie.ai/companies/sitefire/) AI-search visibility, content, citation, and referral analytics for marketing teams. Industry: B2B; Marketing ## [Bubble Lab](https://mudpie.ai/companies/bubble-lab/) Bubble Lab turns event attendance and community operations into relationship context, matchmaking and recurring workflows. Industry: B2B; Operations ## [Cofia](https://mudpie.ai/companies/cofia/) Cofia says it learns repetitive internal work from system events and proposes reviewed automations for tasks such as outreach, recruiting and reporting. Industry: Artificial Intelligence; Workflow Automation; Productivity ## [Perfectly](https://mudpie.ai/companies/perfectly/) Perfectly applies recommendation-system thinking to recruiting, with an AI agent for sourcing, outreach and screening. Industry: B2B; Recruiting and Talent ## [Caretta](https://mudpie.ai/companies/caretta/) A call-side sales intelligence layer whose value depends on technical objection volume, trusted source content and disciplined action controls. Industry: B2B · Sales ## [Agentic Fabriq](https://mudpie.ai/companies/agentic-fabriq/) The control plane for AI agents. Industry: AI / Identity / Security ## [Burt](https://mudpie.ai/companies/burt/) AI teammates that handle repetitive freight-broker tasks while escalating exceptions. Industry: B2B; Supply Chain and Logistics ## [Doomersion](https://mudpie.ai/companies/doomersion/) Doomersion uses a short-form video feed to make comprehensible language immersion more repeatable for mobile learners. Industry: Consumer; Education ## [Fort](https://mudpie.ai/companies/fort/) Fort targets strength-focused consumers with a screen-free wearable, training plans and a pre-order device/software offer. Industry: Consumer; Fitness; Wearables ## [CatchBack Cards](https://mudpie.ai/companies/catchback-cards/) A collectible-pack and resale platform whose strongest trust claim is verifiable pack construction, while fulfillment and buyback terms remain the buyer’s diligence points. Industry: Consumer · Gaming ## [Fenrock AI](https://mudpie.ai/companies/fenrock-ai/) Back-office AI agents for banks that work across existing systems and internal policies. Industry: Fintech; Banking and Exchange ## [SpotPay](https://mudpie.ai/companies/spotpay/) SpotPay targets cross-border consumers with one verified wallet, local/international transfers and a global card. Industry: Fintech; Payments ## [Copperlane](https://mudpie.ai/companies/copperlane/) Copperlane presents Penny as an AI mortgage-intake assistant that turns borrower conversations and documents into reviewable loan files. Industry: Fintech; Mortgage; Artificial Intelligence ## [Panta](https://mudpie.ai/companies/panta/) A licensed commercial brokerage for hard-to-place operators, with AI handling coordination while brokers retain coverage judgment. Industry: Fintech · Insurance ## [Unifold](https://mudpie.ai/companies/unifold/) Multi-chain deposit and payment infrastructure Industry: Fintech / Crypto Payments ## [Beacon Health](https://mudpie.ai/companies/beacon-health/) EHR-native AI operations for primary-care and value-based-care organizations. Industry: Healthcare ## [Prana](https://mudpie.ai/companies/prana/) Prana combines free AI health chat, record/wearable monitoring and $39 human doctor visits in an early beta care model. Industry: Healthcare; Consumer Health and Wellness ## [CellType](https://mudpie.ai/companies/celltype/) CellType describes an agentic drug company built on biological foundation models that simulate human biology for discovery and translational work. Industry: Biotech; Artificial Intelligence; Drug Discovery ## [Mango Medical](https://mudpie.ai/companies/mango-medical/) An early orthopedic planning partner whose value depends on traceable imaging-to-plan workflows, clinician review and regulatory progress. Industry: Healthcare · Healthcare IT ## [ClaimGlide](https://mudpie.ai/companies/claimglide/) AI automated prior-auths for private medical practices Industry: Healthcare / Revenue Cycle ## [ARC Prize Foundation](https://mudpie.ai/companies/arc-prize-foundation/) Open benchmarks, competitions, grants, and research community for general and agentic intelligence. Industry: Industrials ## [AxionOrbital Space](https://mudpie.ai/companies/axionorbital-space/) AxionOrbital targets continuous visibility for defense, disaster response and agriculture by turning SAR signals into usable optical imagery. Industry: Industrials; Aviation and Space ## [OctaPulse](https://mudpie.ai/companies/octapulse/) OctaPulse targets manual fish-farm QA with vision-based grading, phenotyping and a path toward automated sorting and broader aquaculture operations. Industry: Aquaculture; Computer Vision; Robotics; Agriculture ## [DAIVIN!](https://mudpie.ai/companies/daivin/) A deep-tech breathing-equipment project whose tankless diving concept remains gated by independent safety validation, certification and fallback procedures. Industry: Industrials · Defense ## [Milliray](https://mudpie.ai/companies/milliray/) Technology to detect and track small drones Industry: Defense / Airspace Security ## [Condor Energy](https://mudpie.ai/companies/condor-energy/) Energy strategy software for large electricity consumers managing risk, cost, and investment. Industry: Industrials; Energy ## [10x Science](https://mudpie.ai/companies/10x-science/) An early AI drug-development platform focused on the protein-characterization bottleneck between experimental data and candidate advancement. Industry: B2B ## [Aemon](https://mudpie.ai/companies/aemon/) Aemon describes a forward-deployed research engineer that locks an eval, explores many approaches and returns validated technical improvements. Industry: Artificial Intelligence; R&D; Engineering ## [Ashr](https://mudpie.ai/companies/ashr/) Ashr helps teams turn production traces and corrections into eval sets, specialist models and continually improving model infrastructure. Industry: B2B ## [Avoice](https://mudpie.ai/companies/avoice/) An architecture workspace connecting specs, QA/QC, delivery, practice operations, and project knowledge. Industry: B2B ## [Booko](https://mudpie.ai/companies/booko/) Dynamically pricing the whole economy. Industry: B2B / Dynamic Pricing ## [Byteport](https://mudpie.ai/companies/byteport/) A large-file transport layer for teams that need measurable speed and reliability across high-latency, air-gapped or mission-critical networks. Industry: B2B ## [Cajal](https://mudpie.ai/companies/cajal-technologies/) Cajal describes Tau and Lean-based formalization for applied mathematics, quantum computing, finance and AI research, alongside the Talos open-source interpreter. Industry: Artificial Intelligence; Formal Verification; Scientific Computing ## [Cardboard](https://mudpie.ai/companies/cardboard/) Cardboard gives growth and marketing teams an agentic timeline editor for finding moments, making first cuts and shipping multi-format video. Industry: B2B ## [Carrot Labs](https://mudpie.ai/companies/carrot-labs/) AI Cost Management: Track and attribute AI spend across every provider Industry: B2B / AI FinOps ## [Chasi](https://mudpie.ai/companies/chasi/) An equipment-industry revenue and utilization layer for dealers that need faster response, less admin work and better fleet coordination. Industry: B2B ## [Confluence Labs](https://mudpie.ai/companies/confluence-labs/) An early research lab applying learning efficiency and program synthesis to domains where physical experiments are expensive and sparse. Industry: B2B ## [Envariant](https://mudpie.ai/companies/envariant/) Envariant positions its interpretability SDK as an upstream control layer for foundation-model hallucinations, invariants, steering and edge cases. Industry: Artificial Intelligence; Developer Infrastructure; Safety ## [InventoryQuant](https://mudpie.ai/companies/inventoryquant/) InventoryQuant automates contents inventories, replacement pricing and report formatting for adjusters and insurance operations. Industry: B2B ## [Jinba](https://mudpie.ai/companies/jinba/) Chat-built enterprise workflow automation with visual review, APIs, MCP, governance, and on-prem options. Industry: B2B ## [Lance](https://mudpie.ai/companies/lance/) AI Agents That Run Hotel Operations. Industry: Hospitality / AI Agents ## Method Includes all of our approved published profiles with recorded Y Combinator Winter 2026 membership. This remains a researched subset of the public program roster, not a complete intake list or a quality ranking. - - - - - - - - - -