Make sure your brand doesn't get left behind by the paradigm shift from traditional search to generative search. AthenaHQ helps your brand get discovered on generative engines like ChatGPT, Perplexity, Claude, Gemini, and more using generative engine optimization (GEO). AI search is expected to overtake traditional search in the next 3 years. We are building AthenaHQ to fill that gap. Team of former product manager on Google Search's information acquisition team, Deepmind Generative Media team, and ChatGPT superusers.

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.

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.

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

Atlas is building the operating system for restaurants. Atlas is the easiest way to start, run and grow any restaurant online and offline. We are the team that previously built Grain, a venture-backed online restaurant, to millions in revenue. Team and investors are from Grain, Accenture, Microsoft, Udacity, McKinsey, Salesforce, Y Combinator and others. https://atlas.kitchen

Atlog creates voice agents with built-in compliance. Companies use Atlog to automate their calls and texts without worrying about getting sued.

At Atmana, we help millennials cut down on technology addictions like gaming, pornography and social media. We have our solution consisting of blocking and techniques used in treating in alcohol and drug addiction like peer support groups, buddy program and psycho education. We also have a 2nd line of business: helping startups hire engineers from India. Hiring engineers from India can help you save cost while ensuring you have the same quality of talent in your team like you have in the US.

Atmo is the leading company bringing artificial intelligence to meteorology for governments, militaries, and corporations. Atmo builds state-of-the-art AI weather forecasts that are up to 50% more accurate, 10x more detailed, and run 40,000x faster. Atmo has rapidly become the trusted AI meteorology partner for high-stakes users worldwide, such as the US Department of Defense, top aerospace companies, the Philippines, and the United Nations. Today, Atmo forecasting systems protect vital infrastructure and enhance economic activity for its partners, including disaster response, renewable energy, agriculture, transportation, and national security.

The trucking and logistics industry provides the backbone of the economy, but the payments infrastructure on which it runs is broken; the existing suite of payment tools is outdated, difficult to use, prone to fraud, and saddled with hidden fee structures. AtoB is building Stripe for Transportation — modernizing the payments infrastructure for trucking and logistics, where capital movement occurs quickly and transparently. Our flagship product is the AtoB Fuel Card, a zero-fee fuel card accepted anywhere built for fleets of all shapes and sizes.

With our API any company that holds consumer deposits (e.g. savings apps) can easily embed professionally managed investment accounts into their services.

Atomic Alchemy is building a bank of reactors to produce the nuclear material that goes into nuclear medicine. Radiopharmaceuticals are vitally important in biological tracers, diagnostic imaging, and cancer treatments. Currently, the world's supply of Molybdenum-99, the cornerstone of 80% of all nuclear medicine procedures, is sourced from just six government-run, scientific research reactors abroad. Five of these reactors are 45-65 years old and are quickly coming to the end of their operational life. This has cultivated a fragile and lengthy supply chain, at odds with the nature of radioactive material. This issue and its implications do not just effect molybdenum, but any other reactor-based isotope. Many promising cancer therapies are stuck in clinical trials, unable to secure enough material in a timely manner. Research doesn’t even happen because of the difficulty of sourcing any new isotopes. It doesn't have to be this way. Atomic Alchemy is working to solve this by building the world's first scalable radioisotope production facility. This facility will contain the world’s first privately-owned nuclear reactors dedicated to radioisotope production.

Atomic's mission is to replicate high-skill trade knowledge of tool and die makers into AI that powers new manufacturing systems which are orders of magnitude more productive.

Atomized helps developers launch applications in the cloud faster by deploying and managing the necessary infrastructure for you. Simply connect up your Github repo and your AWS account, and we'll handle the rest! The best part is that all the infrastructure runs in your AWS account, and you have full ownership and visibility into it. No more black boxes that you can't troubleshoot and manage. We want to empower engineers to build, deploy, secure, and monitor infrastructure faster than ever. Our long-term vision is to be the go-to platform to get started and to be able to manage all things cloud - no matter which cloud provider you choose.

Atorie is the “luxury Temu”— Growing 100% wow, $1.4M in annual run rate. We are a marketplace enabling high-end manufacturers to sell directly to consumers. We help factories increase their margins by 100% while giving consumers access to unique goods (Italian leather, cashmere, etc.) at 10–20% of the typical retail price. The platform leverages AI to redefine the manufacturing and e-commerce stack (with merchandising/design agents, AI fashion models, and personal shoppers on the consumer side...).

Enabling merchants and consumers to offer flexibility at the point of sale

Atrios is building the world’s largest “who knows who” data set for GTM teams. The Wedge: Warm introductions. Scalable, automated, and incentivized. Cash printing machine that wins us data while creating the world's largest decentralized salesforce. (Making hundreds of intros a month right now at an average price of $1,000/intro) The Data Layer: Over time, Atrios builds the most valuable dataset in B2B: a living graph of relationships, context, and trust signals. How The Wedge Works: Companies upload lead lists + bounties they will pay for meetings. Atrios AI identifies connectors with the right relationships, plus why the intro makes sense. Connectors earn thousands of dollars by introducing people in their network to companies/products they’ll actually value. TL;DR: Cold outreach is broken. Warm intros are just the start. Atrios is building the relationship data layer that will power the next generation of sales and GTM.

Atrium is a new kind of law firm. We serve the startup community in ways our clients want to be served. We are organized like a modern business. We incentivize our team’s creativity and productivity through good management, not the billable hour. We build software to drive efficiency and transparency in our work. We achieve these differences through a technology and operations platform called Atrium LTS, which we co-founded with leading serial entrepreneurs and software developers who share our vision to fix the corporate legal practice. Please find open jobs here: https://www.atrium.co/careers/

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.

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!

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.

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.

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.

Auctomatic, a Y Combinator company, offers an auction and marketplace management system for all of those individual sellers on such sites as Ebay, Amazon, Overstock and others. The application lets you list your items as well as manage your sales, but it also helps you understand how to best optimize your selling and maximize profits. The company also received an investment from Paul Buchheit, the lead developer of Gmail.