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Zephyr Fusion is building the first in-orbit fusion power source: a megawatt-class reactor enabling large-scale industry in space, at a fraction of the cost of equivalent solar. Founded by former physicists from Lawrence Livermore and Oak Ridge National Laboratories, Zephyr leverages decades of fusion research to deliver a compact magnetic confinement system designed to take advantage of the space environment.
San Diego, CA, USA1-50 employees
Zero empowers knowledge workers by transforming the way they manage their email. It intelligently summarizes important messages, helps complete tasks, and even enables users to chat directly with their inbox.
San Francisco, CA, USA1-50 employees
Use ZeroDev to create self-custody wallets for your users, powered by account abstraction. These wallets are truly non-custodial, while being easier to use and way more powerful than even custodial wallets, enabling features such as: - Gas-free transactions - Transaction bundling - Programmable security policies ZeroDev is perfect for anyone who wants to create wallets for users, including Web 2.5 apps, wallet apps, onramps, marketplaces, and more!
New York, NY, USA1-50 employees
We are on a mission to build the world’s most accurate search engine over complex and unstructured documents. Most AI products - whether Q&A bots or AI agents - depend on retrieval systems to provide relevant context from knowledge bases. Yet, the vast majority of these systems rely on basic semantic or hybrid search methods, which still frequently fail. These mistakes lead to inaccurate responses and hallucinations by LLMs, frustrating developers and end users alike. That is why we’re building ZeroEntropy: to add intelligence to retrieval and empower developers to create AI products that are more reliable and accurate.
1-50 employees
Our mission is to build self-improving AI agents. We're here to close the last mile reliability gap. Through calibrated llm judges and automatic evaluations, we help companies optimize their agents 10x faster than doing manual experimentation.
New York, NY, USA1-50 employees
ZeroPath is a developer tool that autonomously detects, verifies, and submits fixes for vulnerabilities in your code. Engineers can use ZeroPath to find security problems that they might only otherwise catch in pentests or from bug bounty researchers.
San Francisco, CA, USA1-50 employees
Zetta is building the next NVIDIA, energy-efficient chips ("XPUs") for AI training and inference, offering superior speed and energy efficiency compared to traditional GPUs and TPUs. Our XPUs are reconfigurable, capable of optimizing the dataflow of each model, making them faster and more energy-efficient than the current SOTA chips on the market. This saves data centers *billions* in cooling and energy costs.
San Francisco, CA, USA1-50 employees
Historically, quantitative models are domain specific. Brilliant people spend their best years testing features, tuning hyperparameters, and iterating architectures within a narrow domain. But scale is the panacea: large models will find patterns people, and specialized models, could not. Forecasting generalizes. Zoa trains cross-domain event forecasting engines. *Automating Iteration* LLMs—embedded in multi-agent optimization loops and evaluated against fixed policies—can automate the build-test-improve modeling cycle. Think AlphaEvolve for forecasting problems. *Sample-Efficient General Models* Today’s forecasting models are narrowly crafted with deep human priors. But larger models will outperform state-of-the-art specialized models. Unlike existing event models, our models leverage data from across contexts and rely less on human intuition. And compared to LLMs, our models are built with more inductive priors and rely more heavily on inference-time compute—improving sample efficiency. *Why It Matters* In the real economy, our models could be useful for forecasting supply chain volatility, energy supply and demand, even earthquake risk. Science is, Ian Hacking writes, the taming of chance. It is the process of iteratively updating priors (something like: identify uncertainty, conceive experiment to reduce uncertainty, execute, update). If science is uncertainty-reduction, forecasting is a critical measure of progress. Better forecasting improves our ability to select interesting experiments (roughly those with greatest expected uncertainty reduction) and update priors. Our models will be used by labs and academics in data-heavy domains. Sam's ex-girlfriend introduced him to Greg back at Carnegie Mellon in 2017, and while that relationship didn't last, their friendship has. After college, Greg went to Harvard Law School, while Sam worked for three years at Jane Street on their Options desk, building & leading a satellite dev team.
New York, NY, USA
Zorba is a real estate sales AI copilot, powered by proprietary vertical data, designed to help sales and customer success teams grow their client base and improve retention. It's used and trusted by both Fortune 500 and mid-market firms. With a multi-layered, LLM-driven engine, we’ve built a proprietary dataset of consolidated real estate entities, delivering real-time insights tailored specifically for the industry. Think Apollo or ZoomInfo, but AI-first and driven by real estate data
Saint Petersburg, FL, USA; Tel Aviv-Yafo, Tel Aviv District, Israel
Zuni is a Chrome extension that gives you AI capabilities in the sidebar of your browser. It can use what it sees on any of your tabs as context, and proactively helps you draft messages and emails.
Remote1-50 employees
a0.dev is a platform that helps mobile developers build high quality apps in days instead of weeks by generating custom react native projects. We've launched top ranking apps that have been used by hundreds of thousands, and now we're creating the tools we wish we had to build faster.
San Francisco, CA, USA1-50 employees
We are a Y Combinator / Latitud backed micro-lending platform in Mexico led by talent from companies such as Capital One, Bain & Company, Konfio, DiDi, Clip, Klarna, etc. We are hyper focused on making sure that customers improve their financial lives significantly through their relationship with us. In a very short time, we have achieved significant traction with exceptional consumer outcomes and unit economics. We are also building and incorporating a significant amount of AI into our operations, so this is a great place to work for anybody who has ambitions to build real time applications of AI. Our goal is to build the biggest AI enabled consumer fintech platform in Mexico and eventually LatAm.
Mexico City, CDMX, Mexico1-50 employees
askLio builds AI Copilots to help procurement teams at enterprises. When an employee wants to procure something, the process used to take weeks. askLio turns it into hours. The company is founded by AI engineers and procurement experts that have built an AI Startup together before. Think of Lio as an additional assistant for every procurement manager - saving enterprises on average millions per year and reducing manual work of procurement managers by 80%. Some of the most renowned companies in the world are already using our AI-Copilot.
San Francisco, CA, USA1-50 employees
assistant-ui helps frontend developers add AI chat to their apps. Our product is used by several dozen companies, like LangChain, Stack AI, Browser Use, and Athena Intelligence. We're building an open source Typescript/React library and a backend as a service, with first class integrations into popular agent frameworks like LangGraph and Vercel AI SDK.
San Francisco, CA, USA1-50 employees
atopile is a new language to design electronic circuit boards with code. We replace point and click graphical interfaces with code to bring software level automation and reuse to the field of hardware design. Our project is open source on GitHub! https://github.com/atopile/atopile
San Francisco, CA, USA1-50 employees
We’re a research lab that puts its ideas to the test in one of the most complex, information-rich environments in the world: the financial markets. If you care about learning systems, clean abstractions, and applying research in the wild - we’re hiring.
San Francisco, CA, USA1-50 employees
With autarc we are building the OS for Europe's One-Stop Energy Installers. The problem: Energy installers are eager to expand their deployment of heat pump and photovoltaic systems, yet they are constrained by inefficient sales, planning, and installation processes. The solution: Our B2B software integrates CRM, planning, and design tools into a unified platform. This enables SMB installers to drastically cut down the pre-installation phase of home energy projects—from several weeks to just minutes. By leveraging LiDAR for spatial analysis, computer vision for automated assessment, and AI for system recommendations, we streamline the entire workflow. This results in a time reduction of up to 90%, enabling installers to confidently transition to and scale up sustainable home energy solutions.
Berlin, Berlin, Germany1-50 employees
Today, Retailers have to make 1000s of complex operational decisions every day, all impacting their bottom line.This problem is being currently tackled with excel or legacy systems, both no longer fit for purpose. We make a platform that lets retailers make optimal decisions, easily and quickly. We ingest a retailer's data, generate recommendations and then allow users to approve a given action. Our platform covers topics including product pricing, inventory replenishment and re-ordering with the goal of covering all operational processes.
London, England, United Kingdom51-200 employees
Instead of navigating complex menus or learning new tools, creatives can simply describe their vision in natural language—“Draw me a Swiss mountain lake. Now make it sunset. Add a boat. Now animate it.” Awen leverages AI reasoning to understand creative intent through voice. Our goal is to redefine how creatives engage with AI technology, balancing power and ease of use for both professionals and newcomers.
Remote1-50 employees
b12 is an AI copilot that plans how to create and test new molecules for chemists. We're like a GPS for chemistry, helping pharma companies plan the recipes for new drugs, accelerating early-stage drug discovery from years to months. Andres built the first AI agent that can autonomously think and make molecules in a robotic lab, published in Nature Machine Intelligence (750+ citations), and won the best paper award at the NeurIPS AI for Science conference. Zlatko is a 3x National Chemistry Olympiad champion, competed at IChO level, and medicinal chemist who has worked at Roche and leading lab robotics companies. He has an extensive network of hundreds of chemists across Europe. We are publishing a groundbreaking paper in Nature demonstrating our AI's ability to optimally plan chemical recipes. We run paid pilots with big pharma companies showing that our platform planned a set of experiments that achieved full conversion in a single attempt, eliminating the usual 8-12 iteration cycle.
San Francisco, CA, USA1-50 employees
beU delivery is an on-demand food delivery service in Africa. We offer a great selection of local restaurants and door-to-door food delivery that allows the customer to have their favorite food from the comfort of their home or office. We are the #1 food delivery service in Ethiopia, deliver at significantly cheaper rate than our peers, making food delivery affordable for the mass. We plan to expand our services to new markets and eventually become the super app of Africa.
Addis Ababa, Addis Ababa, Ethiopia201-1000 employees
Bitrig is the only vibe coder that writes native Swift, which is how the top mobile apps are coded. It's like Lovable for iPhone apps. Kyle and Jacob are creators of SwiftUI, Apple's UI framework for building modern iOS apps, and led its development for the past 10 years. Tim was co-founder and designer of Storehouse, where he won an Apple Design Award and was later acquired by Square. Download bitrig from the App Store: https://apps.apple.com/us/app/bitrig/id6747835910
1-50 employees
Food Supply Chain companies have been using legacy ERPs for decades. Everyone knows these are necessary evils that essentially run the business but take up a lot of operational capacity. They are not about to just rip and replace their existing system that runs their whole business with a system that takes years to implement. Imagine if they could implement AI that runs the ERP for them, in weeks? Burnt’s building an agentic OS for the Food Supply Chain with AI Agents for each department. Our AI Agent, Ozai, has started by replacing the whole order management job function at food distribution companies, so that sales and customer service teams can focus on what matters - the customer. Ozai monitors all incoming messages (emails, phone calls, voicemails, whatsapp, fax etc.), figures out if it's an order, learns each customer's habits, shorthand, and favorite products, picks up on any prep notes, and enters it straight into the existing ERP. It'll even go back to the customers on your behalf when it's not sure about something, clarify things and carry on working. The more it sees, the smarter it gets.
San Francisco, CA, USA1-50 employees
CamelAI is an AI-powered data analyst for business intelligence. Connect any data source—CSVs, CRMs, SQL databases, data warehouses—and ask Camel complex questions or request reports and charts, all without needing code or SQL.
San Francisco, CA, USA1-50 employees
camfer is the AI CAD tool. Now, engineers can create parametric designs with natural language.
San Francisco, CA, USA1-50 employees
careCycle is an AI workforce for medicare agencies and FMOs - helping leading agencies achieve 5x higher conversions, 37% better retention, and saving thousands of agent hours. We're transforming how Medicare agencies handle member relationships with teams of voice AI agents. We're solving the industry's biggest challenge: 50% annual member churn caused by poor post-enrollment engagement. Our multi-agent AI teams work together to handle the entire customer journey - from initial contact through enrollment and ongoing care. When a lead comes in after hours, one AI agent answers and schedules a callback, another calls at the perfect time, a third captures qualifying information, and a fourth handles the warm transfer to a licensed agent. This approach helped a leading FMO write over $2M in renewals during AEP 2024 while reducing agent talk time by 20% per sale. We've pioneered a purpose-built solution for Medicare's unique compliance requirements. Unlike generic AI platforms, our system features built-in HIPAA/CMS compliance, real-time data structuring, and seamless CRM integration. This enables agencies of all sizes to deliver enterprise-grade member care without massive infrastructure investments. Early metrics show the power of our approach: - 5x increase in after-hours conversion rates - 37% improvement in 90-day retention - 3,000+ agent hours saved in a single AEP - $2M+ in additional renewals during AEP 2024 The Medicare Advantage market represents a massive opportunity, with over $360B in annual premiums and growing 10% year over year. By solving the member retention challenge, we're positioning ourselves to capture significant value by transforming the member care experience for beneficiaries.
San Mateo, CA, USA1-50 employees
chrt is a logistics platform for time-critical shipping. We enable businesses to deliver their most critical items same-day. Time-Critical Logistics is a $30B market growing at a 20% CAGR driven by growth in American healthcare and manufacturing. Businesses that place time-critical orders are enterprises who have urgent items they need to deliver ASAP. These orders are critical in nature and often require white glove service -- think therapeutic treatments for healthcare providers or specialized equipment for manufacturers. chrt provides a marketplace of professional couriers who pick up and deliver these orders. We build the software these couriers use to handle the shipments, including a driver app and fleet management tools. This gives us full control of the shipment and allows us to provide shippers with end-to-end tracking. It also allows us to intervene early if we notice something is going wrong. We’re software engineers that became friends years ago at McKinsey. Kyle is an expert in Time-Critical Logistics, having led strategy at a leading startup in the space. Aaron is an expert at designing and implementing AI systems to handle complex coordination. We were shipping code together on nights and weekends for years before chrt; now we’re also shipping freight.
1-50 employees
Skip the complexity, high costs, and limitations of no-code tools—our AI-powered platform lets you create scalable, modern full-stack apps using natural language, all while keeping full ownership of your code.
1-50 employees
Before editing begins, professional video teams spend days copying, organizing, and prepping footage — a process that can eat up 40% of a project’s time and budget. CoCreate runs in the background during backup, delivering fully organized, searchable, and edit-ready projects for Premiere, Avid, Final Cut, or Resolve the moment media is offloaded. The result: faster turnarounds, fewer errors, and more time spent actually editing.
San Francisco, CA, USA1-50 employees
CompliantLLM detects every data leak into third-party GenAI tools used in your company by monitoring employee interactions. Security and tech leaders get visibiliity and control over the data flowing into various Gen AI apps used in their organizations.
San Francisco, CA, USA1-50 employees
crmCopilot – Stop with the grunt work. Spend more time with customers. Are you juggling multiple accounts and conversations? Are you worried about missing follow-ups or letting opportunities fall through the cracks? Are you spending hours every week updating your CRM… but still struggle with duplicates, stale data, and unreliable reports? Does just thinking about Salesforce give you anxiety? Worry no more. crmCopilot is an AI assistant purpose-built to support front-office teams by taking care of tedious tasks and delivering proactive insights: -- Automated CRM Updates: crmCopilot intelligently detects when your CRM needs attention, drafting precise and timely updates that you can approve with a single click - transforming hours of manual data entry into mere seconds. -- Task Management: crmCopilot proactively identifies your next steps, important follow-ups, and critical tasks. It continuously tracks deadlines and action items, ensuring nothing is forgotten or overlooked. -- Global Search: Quickly find crucial information across all your emails, CRM data, calendar events, call recordings, documents, and notes, all from a single, intuitive search interface. No more time wasted hunting down important details. crmCopilot customers close more deals and build stronger relationships. You’ll spend more time with customers, never miss a task or opportunity, and walk into every meeting fully prepared with every customer interaction at your fingertips. Give Salesforce the AI upgrade it deserves. Try crmCopilot today.
San Francisco, CA, USA1-50 employees
Code review is a major bottleneck for software teams, and the rise of AI-generated code is making the problem worse. Reviewing large volumes of code slows devs down, and increases the chances of bugs slipping through. That's why we're building cubic: an intelligent code review platform that helps devs merge PRs 28% faster. How? - When you open a PR, cubic automatically reviews it. It learns from your codebase's patterns, points out bugs, suggesting fixes, and frees you from low-level review tasks. - You then jump into the cubic platform, which is designed to optimize how humans review code. For example, file changes are organized in a logical order instead of alphabetical, and cubic generates diagrams of architecture changes.
London, England, United Kingdom1-50 employees
dScribe AI uses autonomous drones and 3D vision to track bulk inventory. We're starting by helping the ag and mining industry track stockpiles of grain and gravel. Bulk inventory tracking is broken. Companies either rely on guesstimates or pay for expensive manual surveys which are still off by 30 to 50%. Without accurate numbers, it’s hard to plan logistics, like how many truckloads are needed. And it creates accounting issues by misreporting inventory value, hurting financial planning and leading to missed opportunities. We’ve lived this problem, and we know how to solve it. Warren saw it firsthand as a Product Manager at Milk Moovement, a $20M Series A AgTech startup, working closely with feed suppliers and farm managers. Cole was engineer #3 at Tropic, scaling it from seed to Series B, and later led engineering at an AI startup. We’ve built an integrated hardware and software platform and have signed one of the largest agricultural company in North America. As industries demand real-time visibility into the physical world, dScribe AI is positioned to become the system of record for inventory that don’t fit in traditional boxes and barcodes.
Olathe, KS, USA1-50 employees
Datafruit is the first agentic DevOps engineer. It understands your deployment standards, design docs, and DevOps practices, then reasons across them to reduce cloud waste, prevent deployment delays, and eliminate wasted time across the stack. Reach out to us: founders@datafruit.dev
San Francisco, CA, USA1-50 employees
Digiventures SaaS enables banks in Latin America to digitize their loan origination and account opening process. We are live with 30 clients (including 7 banks) in 9 countries.
1-50 employees
Dili (YC S23) is building the most reliable AI automation for compliance in real-world industries. Across energy, infrastructure, datacenters, advanced manufacturing, and construction, Dili has run prevailing wage, apprenticeship, & other labor compliance to help customers secure over $1 billion in federal funding. Dili is building the AI system of record to help physical industries track compliance, analyze labor and spend, run payroll, and more.
New York, NY, USA1-50 employees
Ego AI is building Character AI + Roblox. Our conviction is that 3D embodiment, shared activities in games and AI imbued with human-like personalities will solve the existing problems of low-stakes, shallow and generic interactions that impact retention in consumer AI chat experiences. We’re fine-tuning a foundation model for characters to behave in human-like ways—indistinguishable from real people—and building a UGC platform around it to allow users to create, experience and form meaningful connections & mutual stories with these AI characters. On our platform, simworld, users will be able place the characters in a Stardew Valley style simulated town, where the AI characters will live, work and play, leading rich internal lives. Users who deepen bonds with these AI character friends can invite them out with them to Discord, Minecraft or even a Netflix-n-chill session. Our Character engine, ego AI, built on top of Unreal, will allow users to create, deploy and even monetize their characters across any surface that supports our CCProtocol. The first use case for our characters will likely be DnD-style roleplay, Minecraft RP, and Twitch streaming. Characters will always live and exist in Simtowns with other AIs (and humans) where they will all lead varied internal lives replete with conflict, danger, opportunity, and love…just like humans in the real world! During YC, we used our engine to build TownWorld - a 3D interactive Twitch live stream of the Stanford generative agents paper (https://www.twitch.tv/townworld). To the best of our knowledge, it's the first ever AI 3D simulation of a small town in real time YC Launch - https://www.ycombinator.com/launches/KeD-ego-an-ai-native-3d-simulation-engine-getting-us-closer-to-the-matrix-one-pixel-at-a-time Demo video: https://docsend.com/view/mzf6i7kiwkkgg669 AI 3D TownWorld video: https://docsend.com/view/ig6t2shuz26z7wha
San Francisco, CA, USA
erad provides startups in the Middle East with non-dilutive growth capital. Connect your sales, marketing and banking data and receive an offer within 48 hours. Get access to key insights and analysis about your business.
Riyadh, Riyadh Province, Saudi Arabia1-50 employees
et al. is a mobile app that aggregates your newsletters, research papers, articles, and more, in one place. Think of it as an LLM-powered feed delivering you useful content in short insights. For example, if you’re building an AI voice agent, you’ll see the latest in speech-to-text models without having to actively search, go through a pile of research papers, or prompt an LLM. We extract key takeaways from long-form content - allowing you to read as little or as much as you like from the original piece of information. With et al., you get to stay on top of breakthroughs in your field, build knowledge, and discover new interests effortlessly.
San Francisco, CA, USA1-50 employees
expand.ai instantly turns any website into a type-safe API you can rely on. You can either request data from any website instantly or let expand.ai build up datasets for you. We take care of the hard parts like dealing with bot protection, scaling browser infrastructure and making sure that we only extract verified, correct information.
San Francisco, CA, USA1-50 employees
finbar is the AI investment analyst used by several top-20 (AUM) hedge funds. It automates financial modelling, research, and data analysis so multi-million-dollar decisions can be made 100x faster.
1-50 employees
GoodFin is reimagining private wealth in the era of AI. Our mission is to empower a new generation to build wealth, starting with their investments in alternative assets. Our AI-native platform combines a design-forward experience with a backend powered by a system of intelligent agents. We are building a future where AI unlocks financial hyperpersonalization, automation and optimization for sophisticated financial products, which are typically gated by advisors and reserved for very wealthy clients. This highly fragmented $1.25T global services market will undergo a sea change in the coming years, as trillions pass in the largest intergenerational wealth transfer to date. In a world where most financial decisions will become automated, we believe the next category-defining wealth company will still be human-driven at its core – powered by a high-value community like our membership base of professionals, founders and investors. The next generation financial giant will be an AI-native platform that makes wealth creation seamless, personalized, and social. That’s what we’re building.
San Francisco, CA, USA1-50 employees
haddock is a restaurant operations platform that combines a category-leading System of Record with AI-powered Systems of Action. It centralizes all operational and financial data into a single source of truth, and uses AI agents to autonomously execute workflows such as reconciliation, invoice validation, and incident resolution. By reducing manual work and dependence on scarce talent, haddock helps restaurants improve margins, accuracy, and operational control at scale.
Barcelona, CT, Spain1-50 employees
highlight.io is the open source, full-stack monitoring platform. With just a few lines of code, Highlight makes it easy to understand what's slowing down your users and swiftly address errors and regressions on your web app. Imagine that you have a customer reporting an issue on your web app. With highlight.io, you can playback their exact interactions to reproduce the bug and get notified of any future errors that could happen. That being said, we’re just getting started! We have plans to go way deeper into your observability stack to give you all of the visibility you need. Join us on this journey: - Star us on GitHub (https://github.com/highlight/highlight) to keep up with releases and news. - Join our Discord (https://highlight.io/community) to share product feedback and thoughts.
Seattle, WA, USA; Remote1-50 employees
We derive training data from the world's brightest minds, enabling LLMs to achieve state-of-the-art model performance.
San Francisco, CA, USA1-50 employees
HUD (YC W25) is developing agentic evals and RL environments for Computer Use Agents (CUAs) that browse the web for frontier AI labs. Our CUA Evals framework is the first comprehensive evaluation tool for CUAs. People don't actually know if AI agents are working reliably. To make AI agents work in the real world, we need detailed evals for a huge range of tasks. We're backed by Y Combinator, and work closely with frontier AI labs to provide agent evaluation and training infrastructure at scale.
San Francisco, CA, USA1-50 employees
iOrganBio provides an AI-powered manufacturing platform called CellForge for the precision engineering of human cells and organoids. Targeting biopharma partners, the company enables scalable and reproducible outcomes for in vitro modeling, drug discovery, and cell therapies. They monetize through a B2B model, leveraging a proprietary Functional Human CellAtlas for digital blueprints of cell types.
$2M11-50 employees
Healthcare AIAI ApplicationB2B SaaSSeed$1M-$10M
Generate. Paint. Refine. ideate.xyz is an AI-powered 3D art suite on the web, taking your ideas from concept to production ready assets in record time. Our powerful text to image to 3D pipeline rapidly generates model assets using the latest AI tech. Rapidly generate and edit 3D model textures in your browser using our texture projection and inpainting editor. Get your 3D assets production ready using our texture processing, upscaling and compression algorithms.
San Francisco, CA, USA1-50 employees
We’re retool for data pipelines. We allow less-technical people to edit data pipelines, with easy to use tools.
London, England, United Kingdom; Sydney, NSW, Australia; Remote1-50 employees