Companies
Haystack helps you review and merge code faster, without sacrificing quality. Haystack is a code review platform that breaks down pull requests into digestible chunks and lays them out on an infinite canvas, replacing traditional line-by-line diffs in GitHub with a structured, visual walkthrough.
Hazel builds AI-powered procurement software for U.S. state, local, and federal government agencies. We automate the full procurement process including requirements generation, market research, solicitation drafting, and proposal evaluation. Agencies use Hazel to save time and money while improving mission delivery.
Headstart (YC S17) uses Machine Learning technology to help employers identify the best-suited talent in the shortest period of time. We provide leading organisations with a solution designed to help them transition away from experience/qualification based screening and towards a more inclusive and effective process which considers personality, behaviours, strengths and motivations. In doing so, Headstart helps companies hire people truly aligned to their values, culture and exact job requirements in a seamless, engaging way. The Headstart process is simple and effective: companies save time and money by finding candidates who meet their exact job requirements at an earlier stage, and job seekers connect directly with businesses through an engaging, reusable 15 minute application form. We ensure a transparent process and initiate productive dialogue, making candidates feel valued and helping companies hire the right people.
Healia is reinventing health insurance for dual income families. Our product enables companies to pay for the out of pocket costs of any employee that enrolls in their spouse's health insurance plan. This saves customers $10k per enrollee while providing an incredible employee perk: 100% coverage of a family's health costs. We’re now up to 50+ customers coast-to-coast with over 40k employees using our product!
We use generative AI to call insurance on behalf of healthcare clinics. We save clinics up to 40 hours of calls every week over existing outsourced human solutions. Compared to the existing solutions for benefits verifications: - We're faster -- by default, we have a turnaround of 24 hours compared to typically a 3 day turnaround for competitors - We can reach more payors -- as long as they have a phone line, we can support calling them for benefits. There's quite a few payors in both medical and dental (e.g. Seledent) that have yet to offer a digital retrieval of benefits - We're reliable and consistent -- there is no person-to-person variation or question skipping when it comes to working with software
HealthKey helps doctors offices generate more revenue by finding eligible patients for their clinical trials. We match at-risk patients with cutting-edge treatments, ultimately getting patients access to potentially life-changing treatments faster. Big Pharma pays a lot of money to clinics for each patient they enroll, but finding patients who qualify is an entirely manual process today. We use AI to prescreen doctors’ existing patients against Clinical Trials’ eligibility criteria, making enrollment fast and easy.
HealthSpark empowers physical therapists (PTs) to start, run, and grow their own independent practices. Our AI-native “business-in-a-box” takes care of the administrative work—credentialing, insurance billing, patient onboarding, documentation, and scheduling—so PTs can focus on patient care, not paperwork.
Healthtech-1 automates repetitive processes for healthcare systems. We’re starting with the world’s most famous: the NHS. We’re already live in over 1,400+ primary care practices. Based out of Raj's parents' Primary Care practice the Healthtech 1 team are systematically digitising the repetitive processes they experience everyday, saving thousands of hours of staff time. Why now? The UK's National Health Service (NHS) delivers free healthcare in 590 million patient contacts every year. Post-pandemic, Britain's most treasured institution is in crisis. Patient satisfaction is at 25 year low and 1/7 staff are applying for Non-NHS jobs fuelling an 11% recruitment gap. By digitising the 100s of repetitive processes in healthcare, Healthtech 1 will reverse the trend, and produce the world's most productive health care system.
Heart makes electric airplanes. We’re based in Sweden, and we’re developing a 19-passenger aircraft (EASA CS-23/FAA Part 23 certifiable). The plane will have an all-electric range of 250 miles and a backup generator for reserves and range extension. We have signed LOIs with Scandinavian Airlines SAS (the biggest airline in northern Europe), BRA and Wideroe for 86+ planes.
Storio is a content platform where creators can create original fiction or derivative works based on other fictional worlds. Creators write fictions 10 times faster on Storio. It's a place for community to fully indulge in the fictional world that they wish they were in.
Hedgehog builds robotic mushroom farms. Our robots eliminate labor and our AI optimizes grow conditions to increase yield. We’ll soon grow mushrooms and fungi for <1/3rd the cost of leading growers. Fungi may address our food system’s biggest problems: they transform agricultural waste into protein-rich foods with near-zero environmental impact. Hedgehog’s technology is unleashing fungi as our next major food source.
Hedgehog is a crypto robo-adviser that manages your funds in broad baskets of digital assets covering up to 85% of crypto's market cap. We already have 15k users monitoring $176m in crypto assets and over $548k in GTV on our V1 product, we have completed our exit interview with the SEC as of 4/24, and our custodial product is now live in the App Store and Google Play.
We build tools for developing applications with generative AI models. Whether you are using LLMs, vector databases, and text-to-image models like Stable Diffusion, our tools help you find the right model, prompt, configuration and consistently monitor their behaviors in production. --- **PromptTools**: the first open-source, developer-focused SDK for experimenting with and evaluating prompts, models, and vector databases. You can try the repo here: https://github.com/hegelai/prompttools. If you're building with LLMs and struggling with evaluation, reach out and we can help.
Heimdal builds machines that permanently capture and store atmospheric CO2. We are building technology that profitably captures CO2 with this tax credit, right here in the United States. Our first deployment is Bantam, the largest DAC facility in the US with the lowest cost per ton anywhere in the world.
Helicarrier (previously Buycoins) is building cryptocurrency infrastructure for Africa. Sendcash is an app that lets Africans in the diaspora send money back home. Buycoins is the easiest place to buy, sell, and manage your cryptocurrency portfolio.
Helicone.ai is creating an advanced observability platform tailored for developers working with Large Language Models (LLMs). Our goal is to simplify and enhance the operational side of deploying these models, making it easier for developers to monitor, manage, and optimize their AI applications at scale. Helicone provides a unified view of performance, cost, and user interaction metrics for various LLM providers, like OpenAI, Anthropic, and LangChain, empowering developers to make their LLM deployments more efficient, reliable, and cost-effective. ### Key Features 1. **Centralized Observability**: Our platform captures and visualizes detailed logs and metrics across all LLM deployments. With tools for prompt management, performance tracing, and debugging, Helicone provides real-time insights into the inner workings of your LLMs. 2. **LLM Performance Optimization**: Helicone supports prompt experimentation, success rate tracking, and fine-tuning, allowing you to continuously improve response quality and efficiency. This level of insight makes it easier to deliver high-performing, cost-effective AI applications. 3. **Flexible Data Management**: We understand that data privacy is critical. Helicone supports deployment options for dedicated instances, hybrid cloud integrations, or self-hosted environments, allowing clients to maintain control over their data and ensuring compliance with privacy standards. ### Built for Developers and Data Scientists Helicone is designed to meet the needs of engineers and data scientists who require transparency and control over their LLMs. From chatbots to document processing systems, Helicone equips you with the insights needed to track costs, understand user interactions, and optimize outputs—all from one intuitive platform. By combining observability with LLM-specific insights, Helicone is redefining AI monitoring, empowering developers to deploy and scale their AI models with confidence.
Helium is building self-improving software — AI that continuously experiments on key moments in the user funnel to boost revenue. Our first customer, a social app with 20M MAU, uses Helium to test new in-app paywalls to get more users to subscribe. Zach previously made $100M+ in growth experiments at Uber, Shishir led the first LLM features for Alexa, and Anish worked at Meta building ML to automatically experiment on ads, increasing Instagram ads conversion by 10%.
Helium Health provides a suite of digital health tools for healthcare providers, payers and patients across Africa — most prominent of which is our maiden electronic medical records (EMR) & hospital management information system (HMIS) for emerging markets, HeliumOS. We offer business loans to healthcare providers through our HeliumCredit product. We also work with donors and governments in executing public health strategies. Finally, we have built the largest healthcare data repository on Africans with over 1 million health records.
Technology finds information and delivers physical products to us almost instantly. mRNA does the same for biology. At HelixNano, we see a world where treatments are cheap, progress is decentralized, and you can modify biology at the push of a button. By focusing on mRNA improvements from first principles, we’re getting there faster than we thought. Experiments that used to take months or years can be done in weeks and cost thousands instead of millions. The rate limiting step for our progress is now scientific curiosity. Rigid hierarchies and top-down decisions will miss the magic. Some of our most powerful technologies started out as side projects of junior team members. At HelixNano, every individual scientist can have a massive impact on the company's direction. And the more diverse our team, the faster we’ll find the really cool ideas. We've started rolling out some of our new tech — moving a COVID-19 vaccine candidate for the immunocompromised towards the clinic, and testing an intervention with massive environmental impact. But we’re scientists at heart, and team focus is solidly on the horizon.
