Observe

Whiteboard is an open-source canvas for thoughtful software development. Critique interactive visualizations, diffs, and agent trajectories, all from one interface.

10x Science develops frontier AI models with deep memory to redefine how scientists understand and engineer biology across the life sciences, starting with drug development. AI-powered drug discovery is flooding the p

12,000+ hand-crafted React and Tailwind CSS components, templates, and shadcn themes by real design engineers. Preview live, install with one command — for you and your AI agent.

Give Aemon a problem and an eval. It discovers optimal solutions, often going beyond what human experts can find.

Give AI agents identities, enforce user-scoped permissions, and audit governed tool calls across SaaS, MCP servers and databases with Fabriq Enterprise.

Alt-X is building the AI-native liquidity layer for private markets. Private markets have created trillions of dollars in value, yet remain fragmented, illiquid, and inaccessible. While public markets benefit from exc

We have domain experts build real-world, custom evals for product teams — so you can assess capabilities, find edge cases, and prove value to customers.

ARC Prize Foundation is a nonprofit advancing open-source AGI research through benchmarks & prizes.

Agents that curate your data, post-train open-weight models, evaluate and serve them. You own the weights.

End-to-end data and teleoperation services for embodied AI. From egocentric capture to remote operation.

CAD software rebuilt from the ground up. Fast, thoughtfully designed, AI-native, and built for modern engineering workflows.

Connected intelligence from feasibility to construction — bringing site feasibility, design review & QA/QC, code compliance, quantity takeoff, and scope gap analysis into one system.

Autumn is an AI people and company research platform that turns fragmented public-web data into cited profiles for sales prospecting, startup discovery, fraud detection, and expert sourcing.

Run your whole practice in one place: practice management, timesheets, specification writing, schedules, compliance and project records. Book a demo.

AxionOrbital Space builds foundation models that enable continuous visibility through clouds and darkness. Legacy optical satellites are rendered useless 70% of the time by weather and night cycles, while Synthetic Apert

Axis is an AI Market Intelligence for physical commodities desks.

Balance is an accounting firm whose AI agents keep your books current and whose accountants sign off every entry. UK and Denmark, from £500 a month.

Most teams want to plug in AI but don't know where to get started. BaseFrame's desktop app finds exactly what to automate for each employee using the historic data on their computer. Instead of relying on screen reco

Beacon Health builds AI agents that operate any EHR just like a human — athenahealth, Epic, eClinicalWorks, NextGen and more. Automate pre-charting, quality gap closure, AWV outreach, transition of care and risk adjustme

Stopping Scams Before They Reach Your Customers

Beyond Reach Labs builds deployable solar arrays that deliver orders-of-magnitude more power per launch — bringing scalable energy to the places in space that need it most.

AI-assisted takeoff software for commercial lighting estimators. LuxTakeoff reads your drawings for fixture counts and linear quantities — reviewable and fully editable.

Brumby is the drone-powered toolkit for precision grazing. Move your cattle, measure your pasture, and check your country every day — from one app.

The intelligence layer for communities and events: attendee enrichment, matchmaking and introductions, applications and onboarding, a searchable member directory, and analytics on who came, who connected and who joined.

Burt gives freight brokers and carriers AI coworkers that handle the daily grind — quoting, dispatch, tracking, and paperwork — so your team can focus on the work that needs a human touch.

Button is the wearable AI that can talk. It's a button that you clip to your shirt. You press it to talk to AI, and it responds immediately.

Byteport builds mission-critical network solutions for robotics, satellite, AI, and enterprise applications all over the world. Move massive amounts of data fast and securely, regardless of network conditions.

Cajal builds Tau: faster binaries for large workloads. Tau makes the routines that use most of your compute run faster on your machines, and proves in Lean that the new binary behaves exactly like the original.

Investigate ranking problems, develop signals, and compare reproducible experiments with your team and coding agents.

An agentic AI video editor in your browser and on your Mac. Describe your edit and Cardboard cuts, captions, reframes, and composes it.

Hey YC! We're Devi and Jianna - the founders of Cardinal. Hey guys! We’re launching Cardinal publicly today - co’s like Mintlify, Deepgram, Giga, etc. use us to build revenue agents & design how they sell. The Pro

Realtime AI for sales calls that helps reps answer hard questions, handle objections, and stay sharp before, during, and after every meeting.

Attribute AI spend to the customer, feature, team, or pull request that caused it, across OpenAI, Anthropic, Cursor, and every other provider you use. Free to start.

Rip packs of graded Pokémon, One Piece, sports, and Riftbound cards with a guaranteed buyback: sell any pull back for up to 100% of market value within 5 minutes, or 80% anytime after. Build custom packs, battle head-to-

CellType is building an agentic drug company. AI agents that run the full drug discovery pipeline on top of biological foundation models that simulate human biology. Our core technology, developed with Google DeepMind, h

Chamber — AIOps agents for ML teams. Diagnose failed training jobs, reclaim idle GPUs, and keep every node healthy — so researchers stay focused on building models. YC W26.

Chasi deploys AI agents that help equipment dealers sell more, respond faster, and maximize fleet utilization - 24/7. One-third of the cost to build and maintain the physical world goes to equipment, yet fleet utiliza

ClaimGlide is how the best specialty medical practices automate their prior-auths with AI to reduce costs, save time, and give back peace of mind to practice owners.

Go from idea to playable game in minutes with CodeWisp!

See how your team’s work really gets done. Cofia maps every step, exception, and hour of your team’s work in 30 days, so you know where the opportunities lie.

Compresr is an LLM context-compression API: send long context plus your query, get back a shorter context that keeps the answer-bearing tokens and drops the rest. Cut token cost and latency; at light compression, match o

De-risk your operations and lower your energy costs with AI-powered software. Monitor consumption, hedge procurement, and reduce costs — at scale.

While modern AI excels in any area you can collect a lot of data for, it struggles in areas where data is sparse or costly to attain. Designing new molecules, discovering new physics, and engineering new materials are al

Meet Euclid, the automotive radar with a digital twin. Sense the real world and generate radar in simulation. 8Tx × 8Rx antennas, up to 300 m range.

ConstellationOS is the ML-native operations platform for satellite fleets. Unified telemetry, link forecasts, and policy-bound orchestration. Start with a 30-day shadow pilot.

Copperlane guides borrowers through intake, verifies documents in real time, and delivers cleaner files to loan officers. Cut document chasing and close faster with fewer conditions.

Corelayer is an AI-native production support platform and AI SRE that root-causes production incidents and automates production on-call, support, and operational work in 2026, with BYOC, on-prem support, and PII masking

Corvera is the AI sales agent for CPG brands. All your distributor and retailer data in one place, ranked into what your sales team should do today.

Crosslayer Labs detects impersonation attacks on websites and APIs. We provide "outside-in" monitoring of customer infrastructure, comprehensively discovering and monitoring all Internet dependencies, including DNS, BGP,

GPU orchestration, model inference, and an agent platform. Adopt Paladin, Ion, or Talos independently, or connect the full Cumulus stack.

DAIVIN! builds tankless dive gear that unlocks breath autonomy in extreme environments. Starting from underwater environment our mission is to remove the need for dangerous, heavy and bulky oxygen tanks in space, air and

Infrastructure for identity and fraud. One API. 25+ modules. $0.33 per full KYC. $0.15 wallet screening. $10 of free credit every month.

Ditto Bio discovers drugs for autoimmune diseases by harnessing parasite biology.

From intake to settlement, Docura helps claims teams manage repetitive administrative tasks and helps evaluating physicians prepare defensible reports.

Short videos in your target language, matched to your level. Tap any word for its meaning. Download Doomersion on iOS and Android.

Any work. Any document. Your team stays in control. Self-hosted or self-service.

Emdash (YC W26) runs Claude Code, Codex and other coding agents for your whole team, on your own servers, on Emdash cloud or locally, with the AI subscriptions and cloud commitments you already have.

Payment reconciliation automated end-to-end. Every payment matched, every exception logged and investigated by AI agents, and an always-ready audit trail.

Envariant is an AI interpretability and reasoning SDK enabling foundation model builders to analyze, steer, and control their model's behaviors.

Eos builds and runs operational and revenue-cycle workflows inside the systems your healthcare organization already uses.

Fed10 is the AI workspace for government affairs. Hundreds of policy agents read every political signal, 24/7, and surface only what matters to you.

The first AI workspace for banking back office. Process 20X volume per analyst with bullet-proof audit logs. Built for banks.

Fern build high fidelity simulations for robotics, specifically focused on manipulation tasks. Customers have run over 900k simulation rollouts for RL and evaluations, and have verified that the simulation fidelity is hi

Fixture keeps your CRM current, prepares you for meetings, and stays on top of follow-ups. When you want to take the lead, just ask your Fixture-connected agent.

Foreman AI is construction project management software for contractors of any size. Budgets, proposals, invoices, scheduling, and AI takeoffs in one platform.

Fort is a premium wearable and app built for strength training, workout classes, recovery, and everyday movement. Clear guidance, without obsessive scores.

Forum is an exchange for trading markets built on online engagement. Profit from being early to trends, topics, and people.

Make your ERP AI-native, without replacing it. FullSeam automates close, reporting, and accounting workflows with built-in controls and audit trails.

General Astronautics is a space robotics company building autonomous robots for orbit. Space robotics for microgravity manufacturing, research, repair, and assembly.

The law firm for companies that need senior counsel without a traditional firm

Track every post on any platform for free. Pay every creator in one click. Compliance, tax forms, and invoicing handled. 190+ countries. $10M+ paid out.

GRU Space is building permanent lunar infrastructure to make humanity interplanetary within our lifetime, starting with the first hotel on the Moon. In just 6 weeks, we built the world's first Moon factory: patent-pendin

Haladir builds the AI systems that run distribution and logistics operations. Nomos plans the work: waves, routes, sortation, docks, labor and stock. Talon does the work, with AI agents on the phones, the quotes, the fol

Boards, actuators and motors that already work together. Designed and built in the US.

Human Archive (YC W26) is building the data and deployments infrastructure for physical AI. We design hardware, deploy cameras and sensors globally, and train models that help AI better understand how humans interact

AI SRE agents that automatically learn each customer’s system so they work just like an in-house engineer.

Capital allocation is becoming a more important part of individual economic life. Finance is moving toward a global, onchain, 24/7 future with thousands of markets trading at once. The asset management industry is bu

Insurance contents inventory software for public adjusters and restoration firms. A loss walkthrough becomes priced line items and a claim-ready inventory.

She handles every prior authorization, from benefit investigation to insurer calls.

Build enterprise AI workflows through chat and deploy as APIs or MCP servers. SOC 2 compliant with on-prem hosting, RBAC, and audit logging.

We connect, clean and reconcile your structured and unstructured data then build bespoke applications around your rules, approvals and exceptions.

The AI-native stack for modern underwriting — bespoke to every lending use case. Underwrite borrowers anywhere in the world in minutes.

Klaus ended service on September 1, 2026. How to keep your assistant running elsewhere.

Kyten Technologies is building a factory to manufacture custom aerospace-grade battery packs. 100,000+ drones, submarines, and satellites are being built in the US, but the legacy supply chain can't keep up. During o

Lance is collaborative AI for hotels: an AI front desk that answers every guest call 24/7, guest messaging, housekeeping boards, task management, preventive maintenance and labor scheduling. Trusted by 50+ hotels across

Agents that run your Amazon ads.

LegalOS is an AI-native immigration law firm that combines cutting-edge technology with 40+ years of legal expertise. We’ve studied 12,000 successful petitions to design our process - which allows us to deliver top-qu

Lexius detects what walks out the door unpaid. Checkout loss prevention for grocery and convenience.

Lucent turns PostHog, Amplitude, Datadog, Sentry, or Lucent SDK replays into bugs, UX friction, affected users, and product insights automatically.

Luel is a multi-modal lab building the foundational models of machine perception.

Mantis builds the infrastructure layer for living, predictive models of individual human beings — forecast to the horizon where a decision still has to be made. Starting with medicine.

Martini is the film set for AI videos: the workspace for AI video production where professionals and AI agents generate, direct, cut and deliver together.

Maven is a payments API for AI agents. Collect PCI-compliant card payments on live voice calls or inline in your chatbot, through 25 payment gateways including Stripe, Adyen, Braintree, Authorize.net, Fiserv, J.P. Morgan

Purpose-built AI for investment banking. Transform your dealmaking with intelligent automation.

Mendral is the AI DevOps Engineer — three always-on agents for security, reliability, and performance, plus custom automations for any DevOps work specific to your stack. Automates supply-chain defense, CI fixes, and bui

Menza is the AI data analyst for consumer brands. A brand like Hershey’s would connect all of their data sources and then we give them an AI analyst that works 24/7 looking for revenue opportunities, cost leaks, trends a

Pioneering sensors to detect and track UAVs — from single drones to autonomous swarms in the most demanding conditions.

Mirabelle is a robot chef. She cooks a fresh meal, so you save time for your passions and your people.

Home care admin, without the pain.

Production monitoring and evals for AI agents. Infrastructure for catching AI agent mistakes in production and turning them into evals.

BigLaw attorneys handle your commercial and corporate legal work the same day, at a flat fee agreed before we start. Trusted by 200+ in-house teams.

Identify, investigate, and stop bad actors before the money leaves — from your first dollar to your billionth.

Ndea is building frontier AI systems that blend intuitive pattern recognition and formal reasoning into a unified architecture. # AI for Scientific Advancement Unlike all life before us, humanity's ascent is a stor

o11 is the wallet for your agents to access the paid web. Discover tools, connect services, and manage spending through one simple API.

OctaPulse is the data and robotics layer for seafood production: phenotyping and breeding, camera digital twins and robotic automation, from the hatchery to the processing line.

One Robot builds simulation environments that are realistic to see and realistic to interact with, so robotics teams can train and evaluate robot policies without being bottlenecked by robot time. Today, improving a V

AI medical interpreter for healthcare with real-time interpretation in 150+ languages and dialects, clinical validation, and multilingual workflows.

OpenSpec helps teams and coding agents create, refine, and manage living specifications.

We are building a "manipulate anything" model with the robot hardware that embodies it. We designed a hand-based data-collection device and a high DOF, direct drive robotic hand that match each other exactly, enabling us

What if we made as many cancer drugs next year as we have in the last decade?

Access data and services through one connection. Pay for the calls you make, without a separate subscription to each provider.

Ossus is the intelligence layer for libraries. One system to catalog, circulate, and understand a whole collection.

Transform your medical billing with expert billers and technology. Automated insurance discovery, eligibility verification, coding, patient invoicing, and denial management.

Overshoot optimizes inference for AI teams that run their own models, from engine settings down to GPU kernels. If the deployment does not reach the agreed target, you do not pay.

Write AI policy in plain language. Oximy checks AI requests, files and agent actions on Windows, Mac and Linux, then warns, redacts or blocks them on the device.

Oxus automates the repetitive work behind every audit using AI, so your team can focus on judgment, risk, and decision-making.

Our finance experts use AI-powered workflows to give you higher-quality decisions, faster. Cash flow, margins, monthly close, and more, all in Slack.

Industrial-strength commercial insurance for businesses that build the world. Compare options for general liability, commercial auto, workers comp, and more. Access to A-rated carrier options. Book a call with our expert

Autonomous AI agents that pentest like a real adversary, with continuous penetration testing across your code, cloud and dependencies, every finding proven.

Patientdesk answers every call, books patients into your practice management system, and brings new patients in with ads, reviews and search content.

Pax Historia - alternate history sandbox game.

Payna licenses the company and the originators. Mortgage on NMLS, insurance on NIPR, applications through renewals, in all 50 states.

Perfectly is the recruiting brain for your company. It learns who you hire, how you hire, and why. It then powers AI agents that source and hire the right people in days.

Piris Labs develops photonic components, optical interconnect systems, and execution software for AI infrastructure.

Pocket is a small AI device that turns everything you say and hear into clear notes, action items, and search. We combine custom hardware, AI, and software to build the best note-taking experience for people who talk and

Simulation environments to train & evaluate long-horizon AI agents

Understand every user individually. Act on it automatically. Polymorph mixes qualitative and quantitative signals to give every user their own growth team.

Get instant, free AI health consultations, available 24/7, and see a licensed physician for a flat $39 — no insurance, no subscription. Private. Backed by Y Combinator.

Regulator-grade AI agents that ingest documents, spread financials, monitor covenants, and service every borrower. Built for C&I, CRE and SBA loans.

We help funds source deals and run personalized outreach with AI

A drop-in plugin from Quotient Labs that cuts Claude Code token spend without sacrificing output quality. Backed by Y Combinator.

Ramain is an AI employee for your processes. Describe the task, teach it once, and it runs in the systems your team already uses.

Automate hardware procurement with AI agents that handle POs, supplier follow-ups, and part tracking.

Building robots and training models for automating manipulation in warehouse, starting with e-commerce 3PLs

Work arrives across messages, email, and calls. Ressl AI teammates bring together the context and take action in your existing tools, with your people involved where it matters.

REV1 is Claude code for mechanical engineers, starting with automating the process of turning 3D designs into 2D manufacturing drawings – which is more than 25% of all of what a mechanical engineer does - our software do

Revion is building AI workers fine-tuned for automotive—evolving manual work into autonomous operations that deliver resilience, speed, and growth.

Rhizome AI is a regulatory intelligence tool for life sciences. Cited answers from FDA, EMA and 15 other health authorities.

Robby is the sales platform that makes every customer interaction a first-class experience.

RoboDock builds robots that automate depot operations, like charging and vehicle checks, for electric and autonomous vehicle fleets. We turn fleet depots from manual sites into self-running systems that lower operational

RunAnywhere makes the best open models faster and cheaper to run, for everyone. Wally serves frontier open models through one API key and one CLI, and our open-source SDKs run models on the device.

Salus checks consequential AI agent tool calls against policy and session evidence before your backend executes them.

Deploy a coordinated team of AI agents for inbound and outbound voice, WhatsApp, SMS, email, and chat—connected to workflows, CRMs, and human teams.

The first effective physician scheduling service. We build equitable block, clinic and call schedules for GME programs and provider groups.

We engineer inexpensive, autonomous strike drones designed to operate in the most contested combat environments on Earth! By combining true hardware modularity with an agentic control system that lowers cognitive load

Turn production failures into your next improvement. Find agent issues, build regression tests, and compare changes before your next release.

AI execution through private servers and networks. Graph-based order systems. Programmatic execution for perps and prediction markets. Software-only, non-custodial, venue-neutral.

Servo7 builds container unloading robots. Loose-loaded containers unloaded in under 2.5 hours, deployed at your dock door with only 45 minutes set-up time.

Proprietary multimodal training data for labs. Explore computer use, talking head, speech and audio, video games, and expert work.

Native SDKs and managed video infrastructure for playback, uploads, and live video. Build the experience your app needs with ShortKit.

Do things no one else will.

Simple, instant, business messaging and calling built for teams and AI for work. Available globally.

Sitefire helps brands market their products to AI agents. Track AI visibility, identify what gets cited, and ship brand-aware content that ranks in generative answers.

Search every Claude Code, Codex, Cursor and pi session you've ever had from anywhere, without breaking your flow. Skillsync finds the fix, the decision and the why, mid-prompt.

Connect your GitHub repos and let anyone on the team ship reviewable pull requests. 100 free credits, plans from $50/month. Compare Sparkles to Cursor, Claude Code, and Codex.

Give AI agents their own wallets to pay, invest, and earn. Sell your services to agents via x402 and MPP with no code changes. The financial infrastructure for the agent economy.

Send and recieve funds locally and internatinoally. Spend anywhere with the SpotPay Calypso Card. One powerful digital wallet.

Squid turns models from existing analysis tools into one standard, versioned network, so engineers and agents can validate data, build scenarios, run studies and publish decisions from the same source.

Standard Physics builds agents that run real CFD simulations: describe a problem in plain language and get an answer measured against known solutions.

Stilta builds agentic AI to enforce, defend, and analyze patents. Backed by a16z, NVIDIA and Y Combinator, Stilta is used by leading IP firms and in-house IP teams at global enterprises

Spatial proteomics from H&E and multimodal patient data imputation. Lattice predicts spatially resolved protein-marker maps from routine H&E slides as virtual multiplex immunofluorescence (mIF) channels, transforming inc

Synthetic Sciences is an AI research lab building tools, evaluations, environments and labs to accelerate discovery in the empirical sciences.

AI lab building interaction models to make AI symbiotic with humans. Our early models sit at the Pareto frontier of intelligence and interactivity, measured by time to first audio token, and enable voice agents that a

Benchmarks, private evaluations and training environments for real-world work.

Tepali is the AI EMR for medspas & wellness clinics. Front desk, charting, point of sale, and marketing in one system, with an AI employee that books new leads, charts every appointment, and brings past clients back.

Terminal Use rebuilds operations for construction, logistics, manufacturing, and retail companies so they run AI-first: one process at a time, on the systems you already have.

Terranox is the first AI-powered uranium discovery company.

Cut OpenAI, Anthropic, and Gemini API costs with accuracy held flat — or take a smaller cut and lift accuracy by several points instead. The bear-2 prompt compression API strips low-signal tokens from your inputs before

Traverse helps enterprises run frontier intelligence faster and at a fraction of the cost.

Comps, zoning, and market intelligence — powered by AI. Get accurate real estate data instantly with Travo.

AI teammates that run on the subscriptions you already pay for.

The best crypto deposit infrastructure for prediction markets, exchanges, and fintech platforms. Cross-chain payment SDK supporting Ethereum, Solana, Bitcoin. Trusted by top platforms.

AI agents for customer success and implementation teams. Unisson learns your product, executes customer tasks, and keeps product knowledge up to date.

Valence is a unified trading platform for prediction markets. We provide infrastructure to aggregate and execute contracts across Kalshi, Polymarket, and other platforms, surface arbitrage and mispricing opportunities in

Insurers struggle to price autonomous systems because the historical data simply doesn't exist. Your car insurance draws from over 30 billion claims records, but autonomous trucks and robots have nearly zero. Valgo is th

Big Law quality, faster delivery, and up to 60% lower fees. Experienced attorneys and proprietary AI for tech companies and their investors.

Vela is your AI assistant that books interviews, coordinates across clients & candidates, and handles the back-and-forth so you don't have to.

Velum Labs builds the control plane for coding intelligence. RouteKit pools coding subscriptions and API providers, then routes every task to the right model.

AI for quote-to-cash at distributors and manufacturers. Automate quoting and order entry, then extend the same foundation into takeoffs, order status, and special orders.

Verdex gives dermatology practices an asynchronous skin visit for their own patients. We build the complete case and draft the note. The dermatologist reviews and decides. No cost to the practice.

Connect strategy, planning, creative, campaigns, optimization, measurement, and reporting in one AI operating system for advertising.

Visibl gives hardware companies a faster path to custom silicon — from concept to production.

Voltair’s fixed-wing drones capture RGB, thermal and LiDAR simultaneously, for asset patrols, vegetation management and storm damage assessment. Built in America.

The best grid connection is no grid connection. Voxel builds vertically integrated energy generation and storage systems for data centers that bypass utility connection delays. By leveraging the vast supply of second

The real-world intelligence and action layer. Enrich your POI data. Get local prospects. Connect your AI to millions of businesses.

Wayco is the AI operator for MedLegal cases — medical help and legal representation, free, for every American.

Zatanna maps human-only software workflows and exposes them as reliable APIs your AI agents and internal tools can call in production. No browser automation scripts to maintain.

Give every AI agent its own dedicated iMessage number. Pro is $49/month for assistants and support lines people text first. Growth is $199/month for agents that start conversations. Name and photo sharing included.

Source cheaper parts. Troubleshoot faster. Make better operational decisions.