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We're designing swarms of tiny satellites which will work together to create the first real-time, high-resolution 3D model of the earth. By using clusters of satellites to image the same place on the earth at the exact same time, we can improve image quality by more than 60x over conventional techniques. This technology will massively increase the amount of affordable, high-quality 3D data, enabling a host of new applications across an array of industries, including AR/XR/Autonomy, Defense, Climate/ESG, and Insurance Analytics.
Palo Alto, CA, USA; Sunnyvale, CA, USA1-50 employees
Arroyo is a serverless stream processing platform built on top of the open-source Arroyo streaming engine. We allow companies to transform, filter, aggregate, and join their Kafka streams in real-time just by writing SQL. We charge purely based on usage, with no fixed costs or clusters to manage. In 2025, Arroyo was acquired by Cloudflare and now powers Cloudflare Pipelines
Berkeley, CA, USA1-50 employees
Artemis Search is a vector database search with a twist. We use special-purpose deep-learning models instead of using textual / semantic similarity to evaluate how good a search result is. This enables us to actually reason how well search results match the intent of the search query, eliminating the problems that come from evaluating search results on how much they look like the search query.
San Francisco, CA, USA; Rochester, MN, USA; Remote1-50 employees
We help construction teams eliminate rework, delays, and drawing confusion before construction starts. We analyze PDF plans, detect clashes and inconsistencies across disciplines, and create draft RFIs so teams can resolve issues early. This saves construction companies hundreds of hours and millions of dollars. What we do: - Automatically detect clashes, missing information, and drawing mismatches - Align architectural, structural, and MEP plans so everything matches across sheets - Generate draft RFIs from issues we find - Replace long page-turn meetings with instant drawing analysis - Reduce rework and prevent schedule delays before boots hit the ground We integrate with: Procore, Autodesk, email, and the tools teams already use Teams use us to: - Save hundreds of thousands to millions of dollars per project - Catch design and coordination issues early - Reduce RFIs and prevent field fixes - Keep projects on schedule with fewer surprises Contact us at founders@usearticulate.com
San Francisco, CA, USA1-50 employees
Artie is software that streams data from databases to data warehouses in real-time. Today, most companies run their ETL process every few hours or overnight, so their data warehouse is always out of date; with Artie, the warehouse always has live production data.
San Francisco, CA, USA1-50 employees
Artifact is a collaborative IDE for hardware engineers - accelerating every step in the engineering lifecycle: Design → Procurement → Manufacturing → Integration → Test → Sustainment We've raised $3.5M to build an integrated, verifiable AI copilot with an intuitive UI that reflects how hardware actually gets built. Every artifact is auto-generated and traceable to a single-source of truth. We believe hardware engineering should be rigorous, deliberate, and system-aware. We work directly with customers solving the world's hardest technical problems to modernize how complex hardware is engineered. If you're interested, send your resume & contact info to: careers@artifact.engineer
1-50 employees
Artificial Societies uses AI to simulate large groups of people and how they interact. Companies like Anthropic and 11x are using Artificial Societies to predict how their marketing and content will perform in a simulation of their target customers, before launching in the real world. This is a cracked team: James left rural China at age 14, got into Cambridge, turned down a CS PhD to do startups, and - in his spare time - lead the largest ever study of an LLM society. James is joined by Patrick, an applied behavioural scientist who has run over 200 real-world experiments for businesses including Fortune 500 companies. We joined forces through a shared frustration that no one really understands large scale human behaviours: traditional market research is not only slow and expensive, but fundamentally flawed - it misses how people influence each other. Humans are not isolated individuals, we are social animals. We began by simulating a network of 1,000 investors, and used it to raise a pre-seed and get into YC. Since releasing this publicly as “Wave”, startup founders have run over 3000 simulations. We have since released "Reach", where anyone can simulate their own LinkedIn audience and test how their posts will perform before posting for real. Artificial Societies is doing for simulations what ChatGPT did for LLMs - making them accessible to everyone. As AI advances, we will create representative models of entire human societies. Our vision is a world where all content, products, and policies are first simulated in an Artificial Society. We are on a mission to create Artificial Collective Intelligence - humans innovate in collectives, we want to scale collective innovation with ACI.
San Francisco, CA, USA1-50 employees
Artos is an AI-based document-drafting platform that helps life sciences companies turn their data into critical documents in minutes. These submissions currently take months and are the final hurdle before life sciences companies are allowed to sell their product.
1-50 employees
Banks and fintechs have large teams of human analysts who conduct manual checks and reviews. We replace those human compliance analysts with AI agents that automate 80% of the manual work for faster and more compliant financial crime (AML) reviews. Our first three products are: Screening AI (discount 91% of screening alerts), KYB/C AI (speed up onboarding), Transaction Monitoring AI (handle AML transaction monitoring alerts) Our end goal is to have a whole suite of AI workers that can handle manual compliance work for banks and fintechs. A $24B opportunity in the US alone.
1-50 employees
Arzule is an AI-native ecosystem revenue platform for B2B SaaS teams, starting with partnerships. It continuously monitors the SaaS ecosystem to identify high-impact revenue opportunities across integrations, distribution, co-marketing, and technology alliances. Beyond discovery, Arzule structures and manages your entire partnership lifecycle from identifying the right partners, to prioritizing based on revenue potential, to activating and scaling those relationships. Using always-on AI agents and proprietary data, Arzule builds dynamic profiles of companies and predicts which opportunities will drive measurable revenue, when to engage, and how to structure each relationship for maximum impact. It also optimizes execution through automated outreach, partner coordination, and performance tracking, ensuring every partnership and ecosystem motion is tied to clear ROI. Instead of static lists and manual processes, Arzule turns partnerships into a predictable, scalable revenue channel and the foundation for identifying and optimizing all ecosystem-driven growth.
San Francisco, CA, USA1-50 employees
Asha Health is building the future of self-learning generative AI for healthcare.
New York, NY, USA1-50 employees
Ashr is a fully contained test and evals platform that improves AI agents by ensuring accuracy and quality across a wide range of user journeys through your product. Ashr generates user journeys through your agents’ tool calls, results, and questions. We don’t generate one off tests, we generate large amounts of authentic user stories through your product, and pick up on errors, inconsistencies, and failures that would otherwise take hours of manual testing or get caught by a customer. We also work to ensure agent response quality in line with your business goals by offering custom evaluation metrics. Ashr works with voice, text, automated website generation, image, file generation, and multimodal. We’re also willing to generate custom input types or make modifications for anyone interested. Currently, we integrate as an SDK, and are proactively working to make our documentation and resources as accessible and easy to use as possible.
San Francisco, CA, USA1-50 employees
Aside listens to your sales calls and surfaces real-time answers pulled from your docs, HubSpot, or past calls. It's like pressing 𝚌𝚝𝚛𝚕+𝚟 on your company’s knowledge into every rep – so anyone can sound like your best rep. - 🔎 Shows answers from your docs, Slack, and past winning calls - 📝 Live coaching that catches what reps miss: Aside spots what reps skip during calls and guides every rep to apply your playbook - BANT, SPICED, or your own - not after, live. - 💬 Preload your cheatsheets as Live Cards: Turn your playbooks, FAQs, and notes into instant, in-call cards. - 🎓 Coaching feedback, remembered by AI: Aside reviews every call, gives feedback, and turns it into live suggestions for your next one - so you never repeat the same mistake.
San Francisco, CA, USA1-50 employees
Asimov is scaling the most diverse dataset of human motion data to teach robots how to interact with the physical world. We deploy our hardware across a network of 5,000+ contributors in households, restaurants, hotels, and factories to supply frontier robotics labs with thousands of hours of organic human data.
San Francisco, CA, USA; Remote1-50 employees
With our visual understanding engine & platform, Aspect processes dense multimodal datasets, providing tools for segmentation, QC, structured schema extraction. Companies today have access to Glean and Notion Agents for working with vast text corpuses - Aspect is enabling that for multimodal data.
1-50 employees
Aspora is a Global Neobank that lets you make international payments at live google rates, avail credit in new countries, and invest around the world. We are building a bank that is not bound by borders.
London, England, United Kingdom51-200 employees
Assembly is an AI-native HOA management company on a mission to fix homeowner associations. Traditional HOA management is often reactive, confusing, and inefficient. Assembly takes a different approach by combining professional expertise with intelligent software to make communities run smoothly and decisions easier. We exist to build trust, create transparency, and ensure well-run communities that protect and enhance property values. Assembly simplifies day-to-day operations, automates routine tasks, and delivers the right knowledge at the right time. Our platform gives boards and homeowners clarity to make smarter, more confident decisions. We manage HOAs in San Francisco Bay Area and Greater Los Angeles.
San Francisco, CA, USA1-50 employees
Asteroid builds and hosts AI browser agents for back-office tasks. With guardrails, evaluations, and human oversight, we deliver enterprise-grade reliability across millions of operations, even in regulated industries. Companies can build agents themselves or rely on us to deliver and maintain them.
San Francisco, CA, USA1-50 employees
Astor is an AI investment advisor for retail investors. Founded by Bruno Koba (Nubank, monashees) and Daniel Tulha (Stripe, Robinhood), Astor gives every active investor an AI investment advisor working around the clock to surface their next great investment. We’re backed by YC (S25). Retail investors now account for 25% of all U.S. trading volume, nearly double from 2012. But over 56% still say they don’t feel confident in their investment decisions. Astor fixes that. Our AI agents uncover opportunities, decode emerging trends, and deliver analysis tailored to you. Instead of drowning in noise, investors gain a clear edge, shifting from guesswork to confident decision-making.
San Francisco, CA, USA1-50 employees
Astro finds and buys land for new renewable energy projects, secures grid connections at minimal cost, and sells these development-ready projects to larger energy companies. Founded by Alex Fuster, a former Citadel energy trader, Astro's AI models identify profitable grid connections that eliminate the surprise costs causing 80-90% of renewable projects to fail. With the U.S. needing 2,000 gigawatts of new power generation by 2035 for AI data centers and electrification, Astro unlocks development opportunities that traditional methods consistently miss.
1-50 employees
Astro Mechanica is reinventing supersonic aircraft by innovating on engine, airframe, and systems that industry hasn’t in over 50 years. Our electric combined cycle engine, Duality, is the world’s first jet engine that's engineered for efficiency from takeoff to Mach 3+. This new propulsion technology enables the delivery of people and payloads anywhere on Earth in just hours, laying the foundation for a new operational paradigm: an affordable point-to-point global travel network that will make on-demand, high-speed air transport the new standard of travel.
San Francisco, CA, USA51-200 employees
AstroForge is an asteroid mining company. Instead of bringing back the entire asteroid, we break it up, refine, and return only what’s valuable.
Huntington Beach, CA, USA1-50 employees
Make sure your brand doesn’t get left behind as search shifts from traditional SEO to generative AI search. AthenaHQ is an AI SEO platform for GEO (Generative Engine Optimization) and AEO (Answer Engine Optimization), helping brands show up in AI-generated answers across ChatGPT, Perplexity, Claude, Gemini, and more. AI search is expected to overtake traditional search within the next few years. AthenaHQ fills the gap with a system to measure visibility, identify what AI engines cite and recommend, and help your team improve content and brand presence for AI-first discovery. Team of former product manager on Google Search's information acquisition team, Deepmind Generative Media team, and ChatGPT superusers.
San Francisco, CA, USA1-50 employees
Athina is an end-to-end platform for product teams building production-grade AI features. 1. Prototype: Dynamic Columns let you run LLM prompts, execute code, make API calls, retrieve data, run transformations, and more (in a spreadsheet UI) 2. Evaluate: Run evaluations within the sheet itself - there are 50+ preset evaluation metrics or you can create your own custom evals (no-code). 3. Experiment: Change your prompt, model, retriever, or chain in just a few clicks. Technical users can run even more experiments programmatically. 4. Compare: Compare any number of datasets side-by-side with a diff view, and run evaluations on all of them simultaneously 5. Observability: Monitor your LLM features in production with continuous evaluations and granular analytics. Athina can be used by non-technical users as well as technical users. This means PMs, QA, Data Scientists, and Engineers can collaborate to build great AI products.
Remote1-50 employees
Find and fix your agent’s most critical failures in hours, not days. Atla helps developers cut time spent on manually reviewing traces. Atla’s LLM judge evaluates your agent step-by-step, uncovers error patterns across runs, and suggests specific fixes—so you know exactly what to fix and why. Atla supports the most popular agent frameworks teams build with, including LangChain, CrewAI, and OpenAI Agents. With real-time monitoring, automated error detection, and prompt experimentation, Atla gives teams the visibility and control needed to confidently ship agentic systems that work. We’re a team of researchers, engineers, entrepreneurs and operational leaders. Our expertise in evals was honed through training our own purpose-built LLM Judges, Selene and Selene Mini, which are available open-source and have been downloaded 60,000+ times.
London, England, United Kingdom1-50 employees
Atlas helps enterprise real estate firms managing $50M+ make real-time decisions by unifying their data. Currently, analysts at a $100M real estate portfolio spend 60+ hours a month manually copying and pasting exports from incompatible systems into a master spreadsheet. This process slows decision-making and costs up to 10% of Net Operating Income (NOI) annually. Atlas ingests these chaotic file exports to automatically unify the data, audit for financial leakage, and generate real-time reporting. It replaces weeks of manual work with instant truth.
New York, NY, USA; Remote1-50 employees
Atlas is a modern, all-in-one customer support platform that is built with AI first. We help you solve your customers problems faster by understanding them more completely with a suite of customer tools like session recording, bug tracking, and event feeds. You can think of us as the next generation Zendesk / Intercom combined with Log Rocket and Linear. Learn More: https://atlas.so/ Products: - Chat Widget - Ticketing - Omni channel Support (chat, email, WhatsApp, Slack Connect, and SMS) - Customer Timeline - Session Recording - Help Center - AI Chatbot - Customer Insights
San Francisco, CA, USA; Remote1-50 employees
AtlasGrid automatically builds a visual graph of your mobile app UI and displays analytics directly on your screens. Additionally, our fleet of AI-powered agents will continuously analyze thousands of mobile apps, gathering design insights and identifying growth opportunities + actionable product improvements.
Mountain View, CA, USA; Remote1-50 employees
Atlog creates voice agents with built-in compliance. Companies use Atlog to automate their calls and texts without worrying about getting sued.
New York, NY, USA1-50 employees
Atonomo is an AI team member which continuously ingests product analytics to provide a once-weekly conversion rate optimization you can ship or A/B test, prioritized by ROI (+KPIs). Atonomo submits a PR or gives you a Claude Code/Cursor prompt.
San Francisco, CA, USA1-50 employees
Access the start-up asset class with a diversified, vetted group of seed-stage companies innovating in AI to climate tech from recent Y Combinator batches.
New York, NY, USA1-50 employees
Attain is a one-stop shop for convenience store owners to buy inventory across all their suppliers with higher reliability, price transparency, and product discovery. On average, store owners buy products from over 10-15 different suppliers each week. This painful process involves shopping in massive warehouses or spending hours working with wholesaler’s sales representatives (who sometimes don’t even show up). As a result, stores waste countless hours ordering products through extremely inefficient and tedious processes. These store owners are also severely impacted by inventory shortages and revenue loss which many times results in them downsizing their business or shutting them down completely. Attain solves this problem by providing a single app to purchase products across all of their suppliers, resulting in a one-stop shop for inventory. By aggregating inventory across a multitude of suppliers and wholesalers, Attain helps stores save significant time and money while allowing them to focus on what they do best - growing their businesses. Feel free to reach out at founders@joinattain.com!
San Francisco, CA, USA1-50 employees
Attune makes blazingly fast build tools that require zero migration effort. As AI enables developers to write code faster than ever, slow builds are increasingly becoming the bottleneck in development velocity. Developers regularly lose hours of productivity every day waiting for their builds. Imagine being able to write code in 1 minute, but needing to wait 30 minutes to compile, deploy, and test it. Existing solutions either require painful migrations to new tools (e.g. Bazel) or rely on just using bigger servers to run your builds. Instead, we do native, first-class integrations into compilers and build systems. With Attune, you don't need to integrate a new tool. Just make a one-line change from `cargo build` to `hurry cargo build` for 20x faster builds. Eliza (ex-Google) and Xin worked together for 3 years at FOSSA, where Eliza was Head of Engineering and Xin was Head of Product. Eliza brings a decade of programming languages and build systems expertise, while Xin brings a decade of experience building developer tools products, most recently as VP of Product at Teleport (S15). Having experienced the pain of slow builds firsthand across hundreds of production codebases, we're building the solution we've always wanted.
San Francisco, CA, USA1-50 employees
We build AI-powered compliance software for behavioral health organizations. Our system keeps them continuously audit-ready, reduces documentation costs, and protects revenue by automating the compliance work clinicians hate, freeing them to focus on care.
San Francisco, CA, USA1-50 employees
Atum Works is building 3D ASML. Founded by Caltech and NASA engineers, we're starting the next scaling law of semiconductor manufacturing, this time in 3D.
Mountain View, CA, USA1-50 employees
Auctor brings alignment and intelligence to software implementation, enabling every project to deliver its intended value with clarity and precision.
New York, NY, USA1-50 employees
Aug X Labs is an AI-powered content-creation platform that lets brands and creators quickly produce social-ready videos from audio or video footage. It targets podcasters, marketers, and media teams seeking scalable video production. It operates as an AI-based content creation platform.
New York$4.1M / $8.25M val11-50 employees
Creative / MediaAI ApplicationB2B SaaSPre-Seed / Seed$1M-$10M
Aurasell is an AI-native platform that consolidates 15+ go-to-market tools into a single AI-powered CRM tailored for sales and GTM teams. It provides territory management, forecasting, quoting, and AI-driven agentic workflows, offering a unified data model and automated workflows to replace fragmented legacy tools. Revenue is generated via SaaS subscriptions and usage of AI GTM features.
Sales TechAI ApplicationB2B SaaSSeries A$10M-$50M
There are 2 problems: The first, CAD software is slow and the second, designing with it is a tedious process with many steps. Aurorin solves both of these problems by being a CAD software built from the ground up on a modern tech stack with AI at its heart. Building the CAD kernel lets us fully leverage AI while modernizing execution speed. Almost all existing CAD software (Solidworks, NX, Creo, Catia, Fusion 360, Onshape etc) use the same couple of underlying CAD kernels built in the 80's. It's common for these programs to take 4 hours to open a file. Aurorin uses a custom parametric and B-Rep driven CAD Kernel built to take full advantage of modern CPUs and GPUs and be AI native.
San Francisco, CA, USA1-50 employees
AutoComputer is a desktop robotic process automation system. Given just a text prompt, our AI automates tedious tasks such as financial data entry by performing all the clicks and keystrokes for you.
San Francisco, CA, USA1-50 employees
We’re building the next generation of warehouse robotics. In the US today, retailers spend approximately $10B per year paying human laborers to pick up and move cardboard boxes in warehouses. Existing solutions for automating this are expensive and difficult to install, which is why manual operation is still so prevalent. Our solution is different. We make swarms of small mobile robots that install into existing warehouses to provide a low-cost and robust automation solution for case picking and mixed-SKU palletization. Our novel technology allows these robots to be installed and operate at significantly lower cost than existing solutions while being both flexible and robust.
San Francisco, CA, USA1-50 employees
At AutoSitu, we’re building coordinated AI agents that live inside cities’ cross-department development review workflows—doing the heavy lifting, escalating judgment calls, and letting staff focus where human expertise actually matters. AutoSitu provides expert-level guidance and catch issues in minutes, helping cities and design firms/developers navigate an increasingly complex and fragmented regulatory environment. We serve as a strategic partner to forward-thinking public agencies and design teams across the country and are backed by Y Combinator (W26).
1-50 employees
Automax.ai does property appraisals faster and more transparent. Our mobile app uses LiDAR and computer vision to capture property details automatically, and our custom-trained AI agents combine that data with all the analysis and aggregation required to to generate a complete appraisal report in minutes. The result is a clear, grounded valuation, fully Fannie Mae & Freddie Mac compliant — done in under 20 minutes from start to finish.
San Francisco, CA, USA1-50 employees
Automorphic has invented a way to infuse knowledge into LLMs via fine-tuning (surpassing context window limitations), enabling developers to rapidly iterate on and successively improve custom models cheaply and efficiently.
San Francisco, CA, USA1-50 employees
Autonomous is a superintelligent financial advisor at 0% advisory fees. Today, managing your money means one of two bad options: DIY your money: You end up with accounts everywhere (401k, IRAs, brokerage, crypto, savings, equity, secondaries). Your spreadsheet is always wrong. You make expensive mistakes because this isn't your full-time job. Hire a financial advisor: They'll manage your money and charge 1-2% of assets annually. Run that math over multiple decades and you're handing over half your net worth to fees. Neither path can economically deliver the sophisticated, personalized strategies the ultra-wealthy use to compound wealth: strategic tax-loss harvesting across individual securities, systematic risk management, portfolio-backed borrowing to defer capital gains, access to alternatives, etc. These aren't secret – they're just economically impossible to deliver at scale through traditional human advisors. Robos were supposed to fix this, but they were designed in a pre-AI world. In practice they just manage cookie-cutter portfolios. They don’t coordinate across your 401(k), taxable accounts, mortgage, equity, and cash flow, they don’t help with real decisions like job offers, windfalls, or concentrated stock, and they don’t deliver institutional strategies. That’s why, even after a decade plus, the biggest robos are still <$100B AUM while old-school advisors like Raymond James / Edward Jones sit on trillions. We’re doing for financial advising what Robinhood did for brokerages. Think of it as a full-stack, AI-native wealth strategist that brings billionaire-style playbooks to ordinary investors. Autonomous is built around a frontier-scale reasoning engine—an AI that perceives global events as they unfold, understanding their deeper implications for markets and and most importantly, how these events will impact your investments.
New York, NY, USA
Autosana uses AI agents to save countless engineering hours and help teams ship with more confidence. Turns natural language into E2E tests, eradicating manual testing and the need to write/maintain UX scripts. Seamlessly integrates into your CI, supports both iOS, Android, and Web apps, and is framework-agnostic (React Native, Flutter, Swift, etc). Catching bugs before users do.
1-50 employees
Autotab is a drop-in AI knowledge worker that uses a mouse and keyboard like you—so anything you can do, it can do. Show it how to perform your task, train it to be hallucination-proof by adding examples and providing feedback, and then run it on demand or on a schedule—either locally or in the cloud. It achieves superhuman reliability, and can scale up on demand so your team doesn’t have to. Autotab is already handling complex tasks thousands of steps long, from messaging customers to triggering payments and updating data across core systems of record like Salesforce, HubSpot, Google Sheets, and Jira. Download the beta version of the app and get started right away, or sign up for a personalized onboarding: https://www.autotab.com
1-50 employees
Autumn is open-source infrastructure over Stripe that allows AI startups to build their pricing plans quickly, and flexibly. We act as your app's DB and manage who's paying for what, track usage and manage customer feature access. YC companies use us because we make it easy to handle common pricing models like usage-based, credits, subscriptions, rollovers and more in 3 functions and no webhooks. As you scale, you get reliable billing, that you can change however you want without wrangling code (we handle versioning, migrations etc), and manage custom pricing too. Everything you could down the line (credits, multiple subscription groups, rollovers, referral program, usage analytics, centralized team billing etc), you can drop in at any point.
1-50 employees
Autumn is building the first real-time signal intelligence platform for GTM teams. We monitor posts, commits, blogs, and announcements, surfacing buying signals the moment they appear. Define your ICP and the signals that matter, and we deliver a condensed, real-time feed filtered by intents.
San Francisco, CA, USA1-50 employees
Autumn Labs delivers a developer-friendly platform for monitoring and managing modern manufacturing lines. Seamlessly integrating with robotic stations—automated test stations, robotic assembly cells, and industrial arms—it ensures full traceability, live data monitoring, and secure data transport. We prioritize streamlining factory operations, boosting production quality, and preventing supply chain disruptions, all while offering an effortless onboarding experience for engineers and manufacturers.
San Francisco, CA, USA1-50 employees