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Grey provides US, EU, and UK accounts for remote workers in emerging markets. For the first time, western companies feel comfortable recruiting skilled workers from anywhere and Grey is making it easy for these workers to receive their salary, save in foreign currency, convert to local currency and spend.
San Francisco, CA, USA; LA, Nigeria; Remote1-50 employees
GroundControl builds mission-critical software for manufacturers in highly-regulated industries (aerospace, defense, medical) Our core product automates lengthy, complex, and regulated quality documentation in aerospace manufacturing. As an example, the Boeing 777 is made up of over 3 million parts sourced from manufacturers around the world. These manufacturers must complete quality documentation for every part on this aircraft (machined parts, printed circuit boards, wire harnesses, assemblies, and more). GroundControl helps manufacturers complete this required documentation accurately, in minutes instead of days.
San Francisco, CA, USA1-50 employees
GrowthBook is an open source platform to help companies make data-driven product decisions with feature flags and A/B tests. Existing SaaS solutions like LaunchDarkly require a company to send all of their data to them. This results in high costs, data compliance issues, and vendor lock-in. As a result, many companies end up building their own platforms in-house, which can take thousands of hours of work and lots of headaches. To solve this, GrowthBook uses a company's existing data infrastructure and business metrics. We believe feature flags and experimentation are the right way to build products at scale and that they will become a standard part of the development process. GrowthBook is well positioned to be a leader in this growing market.
Palo Alto, CA, USA; Remote1-50 employees
Guac accurately forecasts grocery demand to help supermarkets order and produce the right amount of inventory — reducing food waste and increasing availability.
New York, NY, USA1-50 employees
Your immune system is your body’s best weapon and defense against cancer. It is only when it is overcome that cancer develops into full blown disease. Dendritic cells sit at the helm of the immune system, directing and dictating immune responses. Data has shown dendritic cells are often dysfunctional in cancer patients, and that this dysfunction is a bottleneck for other therapies. Guardian Bio’s approach is focused on creating a dendritic cell-based product which drives anti-tumor activity through activating the killers of the immune system AND training them against multiple cancer targets. We take stem cells from cancer patients, turn them into specific therapeutic dendritic cells specially trained against that patient’s tumor, and re-introduce them back into the body. Our therapeutic dendritic cells revitalize the killers of the immune system and give them the kickstart they need to fight - and win - against cancer.
Boston, MA, USA1-50 employees
The rise of low-cost commercial drones has introduced a new class of asymmetric threats to U.S. national security. Off-the-shelf platforms now deliver ISR, contraband, or payloads with precision, while operating below radar coverage and beyond line-of-sight. These systems—often costing under $1,000—are capable of neutralizing multi-million-dollar defense assets. For drone detection to be viable at scale, sensors must achieve cost parity with the threat. In response, the Department of Defense established multiple initiatives to counter the rapid proliferation of uncrewed aerial systems. The Joint Counter-small UAS Office (JCO) coordinates policy and acquisition across services. The Base Defense Cross-Functional Team enables persistent perimeter security for CONUS and OCONUS installations. Falcon Peak, Red Sands, and related exercises are accelerating deployment of counter-UAS technologies in complex environments. This threat is no longer exclusive to military operations overseas. It now directly targets the U.S. homeland. In 2025, an executive order designated the protection of American airspace sovereignty a national priority, recognizing that uncrewed systems present both surveillance and kinetic risks within the United States. That same year, a domestic extremist plotted to destroy a Tennessee power substation using a drone rigged with C-4 explosives—a plan disrupted by undercover federal agents. In July 2025, an unauthorized drone collided with a rescue helicopter during disaster response operations in Kerr County, Texas, forcing an emergency landing and halting flood relief efforts. These are not isolated incidents—they reflect a broader shift in drone-enabled threats against homeland infrastructure and public safety. Guardian RF builds passive, radiofrequency-based drone detection systems for force protection and critical infrastructure defense inside the United States. Our systems are fielded under an AFWERX Direct-to-Phase-II SBIR with the 30th Security Forces Squadron at Vandenberg Space Force Base, deployed by local and state law enforcement, and integrated into commercial security operations. We were selected as a finalist for Falcon Peak 25.2, the Department of Defense’s premier counter-UAS exercise. Scout is a passive RF sensor for fixed, mobile, or temporary deployments. It detects and classifies drone control signals—including modified variants of DJI, Crossfire, and ExpressLRS—at standoff ranges. Scout supports direct integration into TAK and other operational APIs and is managed through GRF-SECURE, our secure interface for live monitoring, threat alerting, and forensic review. Mosaic extends coverage in austere environments, enabling persistent low-altitude monitoring and classification of non–Remote ID drones across complex terrain—without active emissions or mesh dependency. Built in the United States, Guardian RF delivers scalable, automated, and cost-aligned drone detection—passive by design and hardened for real-world deployment across the homeland.
At Guide labs, we build Interpretable foundation models and AI systems that can reliably explain their reasoning, and are easy to audit, steer and understand. We provide access to these models via our API.
San Francisco, CA, USA1-50 employees
Gullak is a mobile app that automates savings & invests these in Gold. We launched in India 60 days ago and have grown from 0 to 40k transacting users and hit a monthly GTV of $280K already. We are growing 25% week on week. India is a nation of savers but the way the majority of India saves is non-smart & does not create wealth. There are 200 Mn Indians who save manually in bank deposits, the returns from these instruments do not even beat India's inflation. Gold is an instrument that India loves - 30Bn worth gold is purchased in India every year by middle income households. Gold has great cultural significance in India & there is high familiarity with the asset class. Despite gold being a familiar asset class & giving 5% higher returns than bank deposits, 200 Mn Indians still save manually in these non wealth creating bank deposits. This is largely because the ways to save in Gold required painful discrete activities such as manually accumulating money to buy gold, going to offline stores to buy this gold, incurring storage charges & more. The minimum ticket size for purchasing gold at these stores is $50 adding to more friction to saving in Gold. Using automated savings, Gullak now makes it extremely easy for users to save small amounts regularly($1/day) in digital Gold.This was not possible a year ago because the underlying infrastructure(UPI Autopay) was missing. With 50 Mn Indians saving $2/day & with gold backed lending, this is a $1.5Bn market opportunity. Gullak’s Founding team is the team which built BHIM UPI App(10Mn Downloads in 10 Days), this was launched by the PM of India. We built large scale payment systems for partners like GooglePay / Amazon, processing more than 30Mn payments/day. This is the same team that has built more than 40+ consumer brands & their initial growth strategy.
Bengaluru, KA, India1-50 employees
Gumloop is a platform for automating repetitive and complex workflows end-to-end with AI. Builders drag, drop, and connect modular components onto a canvas to build powerful automations. We provide the tools and the infrastructure to operate at 10x the speed of writing, testing, and productionizing code so you can focus on the problem at hand.
San Francisco, CA, USA1-50 employees
Gym Class is a top-rated social game for virtual reality. Download to make friends and hangout, compete and play sports, or create and explore in simulated worlds. Join us on our mission is to connect the world by simulating it.
Los Angeles, CA, USA; Remote1-50 employees
Every month, our robots greet thousands of Americans with a smile. They answer questions, upsell customers, and can be trained just like a human employee.
El Segundo, CA, USA
HOAi (acquired by Vantaca in Fall 2024) is a fast-growing startup revolutionizing the community association management industry. Our AI workforce platform integrates machine learning technology to streamline labor-heavy processes, eliminating inefficiencies and driving scalability. With rapid growth in the AI space, we are pushing boundaries to redefine industry standards.
San Francisco, CA, USA1-50 employees
HOKALI is the marketplace for buying after-school programs and enrichment activities with high-quality, vetted vendors in the US. We simplify the process of booking, organizing, and managing after-school programs and camps for schools.
San Francisco, CA, USA1-50 employees
HOMLI is building the first fully autonomous real estate broker, enabling homeowners to sell without agents.
New York, NY, USA1-50 employees
HYBRD helps you get stronger and faster. It pulls in all your training data, from every wearable and workout tracking app you use, and uses it to personalize training plans specifically to you and your goals Existing products tend to focus on only one type of exercise (either cardio or strength), leaving hybrid athletes juggling disconnected tools. As hybrid athletes themselves the founders found this frustrating and set out to build the unified approach they needed for their training. Three of HYBRD’s founders previously worked at WHOOP, each leading teams across product, growth and analytics. Ruiters, the CTO, was a senior tech lead at AWS. In parallel, Mats was a member of the US national rowing team and Ben, Shoe and Ruiters have all completed Ironman 70.3s. The team's VP of tech/founding engineer Michael rowed at Cornell and is ex-WHOOP as well.
Boston, MA, USA1-50 employees
Hadrius allows regulated financial firms of all sizes to consolidate and automate their compliance processes using AI in one platform. Today, we're securing compliance for $3T+ AUM across our clients. We're building the AI that will regulate the US financial system and the trillions that flows through it.
New York, NY, USA1-50 employees
Haladir is a data & training infrastructure company for verifiable domains, enabling RL to scale beyond boutique environments & toward continuous self-improvement.
San Francisco, CA, USA1-50 employees
Communications channels are your company's most critical blindspots. While traditional monitoring focuses on files and network traffic, risks hide in everyday conversations. Haleum AI leverages the latest in LLMs to stop financial fraud, IP theft, compliance violations, and insider threats across your communication platforms
San Francisco, CA, USA1-50 employees
We help foundation model labs and enterprises train computer use AI with data and sandboxes. A knowledge worker spends 90% of their day on a computer. A productive AI agent must similarly learn how to use our computers, browsers, and software to deliver real world value. Today, browser and computer use AI is inaccurate, slow, and expensive. Model labs and enterprises who want to improve these agents are bottlenecked by two resources: 1) High quality datasets for benchmarking and evaluations 2) Realistic sandbox environments for safe and accurate testing/training (ex. a simulated version of Salesforce) Halluminate offers a suite of products and services to address both these issues. Our evaluation service combines proprietary datasets with high quality annotations to help our customers identify and prioritize the biggest failure modes of their computer- and browser- use AI. Our platform provides a catalog of fully managed sandboxes, empowering our customers to safely and accurately test/train at scale, resulting in improved performance. Our customers see - Improved browser- and computer-use agent performance - New and emergent frontier agent capabilities - Data driven prioritization leading to exponentially faster development speed - Increased revenue/sales via marketing from public benchmarks Our paying customers already include leading computer use model labs and the two largest browser agent companies in the space. Wyatt and Jerry are friends that met their first week of school studying CS at Cornell University. They’ve been working and studying together for 7+ years.
San Francisco, CA, USA1-50 employees
Generic payroll providers weren't built for construction - Hammr is. Our modern tools simplify construction payroll, HR and operations. We help construction companies boost profits, not paperwork.
San Francisco, CA, USA1-50 employees
Post-order operations are one of the least automated parts of e-commerce. After an order is placed, teams still spend their days tracking shipments, chasing exceptions, processing returns, adjusting invoices, and answering “Can you check this?” requests. This manual busywork lives outside core systems and scales linearly with order volume, forcing brands and 3PLs to keep adding headcount as they scale. Handled is an operations automation platform for e-commerce brands and the 3PLs that run their order fulfillment. We execute the manual work that happens after an order is placed by unifying post-order data across commerce, warehouse, carrier, and support systems. Handled gives teams real-time visibility across orders, shipments, returns, and inventory in one system — eliminating the need to dig through disconnected tools or react only after customers complain. When issues occur, Handled automatically executes the follow-up work, such as resolving shipment delays, processing returns, filing claims, or making order and billing adjustments, without manual back-and-forth. By combining visibility, issue detection, and automated execution in a single AI-powered operational layer, Handled replaces manual coordination with software-driven post-order operations in a large, recurring market tied directly to e-commerce volume.
New York, NY, USA1-50 employees
We're building the HaploHub: a SaaS platform for genetic testing labs, concierge medical practices, and payer/providers to: * predict disease risk for their patients based on proprietary or publicly available genetic models * securely host, manage, and interrogate the genetic data of their population * generate reports and run the most common inference algorithms (phasing, imputation, ibd, etc.) without writing code
Remote1-50 employees
Happenstance is people search powered by AI. For example, you ask Happenstance "find people who work on notification systems at big companies", and it comes back with two who follow you on Twitter and five who are connected to your partners. That kind of thing you just can't do on LinkedIn.
Remote1-50 employees
Happl - Personalised benefits for employees to choose what’s right for them, and tools for managers to engage their teams, whilst we take care of all the compliance and admin. Founded in 2020 and based in London, UK, Happl works with some of the UK’s leading employers to bring their hybrid working culture to life! https://www.happl.com/
London, England, United Kingdom1-50 employees
Harbera helps clinic keep their doctors credentialed and compliant. Our AI software continuously monitors and proactively helps admin teams re-credential doctors, preventing denied claims, disruptions in patient care, and lost revenue caused by doctors falling out-of-network.
San Francisco, CA, USA1-50 employees
Harmoney is an agentic AI solution for fixed income research, portfolio optimization, and credit analysis for buy-side and wealth managers. We not only make financial analysis faster and cost-effective but also unlock things that could not be done manually before.
MH, India1-50 employees
At Harper, we are building a fully autonomous commercial insurance brokerage powered by AI. Our initial focus is on mid-sized businesses with complex insurance needs, but our vision is to eventually serve every business in the country. By leveraging AI to automate key workflows in the insurance process, we efficiently secure optimal coverage for each client's unique requirements at competitive prices and with rapid turnaround. Our AI system learns from the expertise of our brokers, accumulating not just knowledge but also the specific workflows, data, and capabilities that pave the way to full autonomy.
San Francisco, CA, USA1-50 employees
Hatchet abstracts away the infrastructure for managing task queues and message brokers, so you can focus on writing your background task and workflow logic. With Hatchet, you can run slow OpenAI requests in the background with async tasks, chain complex tasks together into workflows, and set retries and timeouts to recover from failure.
New York, NY, USA1-50 employees
Haven is building AI Agents to automate property management operations. Our first Agent is automating the maintenance coordination process. This means answering the phone when tenants have a maintenance issue, diagnosing the issue, dispatching a technician, and then following up with tenants to make sure the issue is resolved.
1-50 employees
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.
New York, NY, USA1-50 employees
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.
New York, NY, USA1-50 employees
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!
Columbus, OH, USA1-50 employees
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
San Francisco, CA, USA1-50 employees
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.
Austin, TX, USA1-50 employees
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.
San Francisco, CA, USA1-50 employees
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.
London, England, United Kingdom1-50 employees
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.
San Francisco, CA, USA1-50 employees
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.
San Francisco, CA, USA1-50 employees
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.
1-50 employees
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.
San Francisco, CA, USA
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%.
San Francisco, CA, USA1-50 employees
As AI agents replace traditional software, they need a way to store, recall, and reason over contextual data. HelixDB gives them all of that in one system. We’re building the knowledge infrastructure every AI agent will depend on.
London, England, United Kingdom1-50 employees
Next-generation truck management software to automate back-office operations for trucking companies. Features include AI agents to automate inbound/outbound calls, AI document upload to reduce manual data entry, load sourcing tools, automated accounting, and more.
San Francisco, CA, USA1-50 employees
Henry is an AI copilot for commercial real estate (CRE) brokers that seamlessly integrates a brokerage’s internal data set with external sources to generate custom presentations and financial modeling for deals. Our mission is to help CRE brokers close more deals faster, earning more while doing less repetitive work. We’re initially focusing on enabling brokers to generate deal decks in seconds—a task that typically consumes 20+ hours a week across multiple departments within a brokerage.
New York, NY, USA1-50 employees
Heptabase is an intelligent, visual knowledge base built for students, researchers, and lifelong learners. Our product helps you master anything you learn and do your best research with AI. Heptabase is backed by Y Combinator, HOF Capital, Kleiner Perkins, Moving Capital, Tonic Fund, and other investors, including the founders of Socialcam, Triplebyte, Codementor, and more.
London, England, United Kingdom; Remote1-50 employees
Hera is an AI motion designer that turns 5-hour projects into 5-minute tasks. When you're a YouTuber making an infographic animation, instead of spending hours manually clicking buttons in Adobe After Effects, you can create the same animation in minutes in Hera. Through talking to our users, we realized that 95% of time spent on motion graphics is manual button clicking, not creative work. This insight led us to focus on automating the tedious parts while giving the user all creative control. We launched in May 2025, got 100k waitlist signups in 8 weeks, and we're doubling revenue monthly.
1-50 employees
HeroUI makes it simple for AI agents and developers to build beautiful, accessible, production-ready interfaces for web and mobile. In the AI age, design matters more than ever. Every micro animation, color, and interaction shapes how users experience your product. HeroUI makes that level of creativity and craft simple
San Francisco, CA, USA; Remote1-50 employees
Hestus is AI-powered CAD software that speeds up hardware development. While engineers are typically quick at coming up with initial design concepts, they are bogged down getting from idea to the final design due to countless tedious and repetitive tasks. We are building CAD software that automates these mundane tasks and speeds up the design execution process, while letting engineers spend more time on the creative part of the design process.
1-50 employees
Hex Security builds AI agents that run continuous penetration tests against your apps and infrastructure. Instead of a once-a-year penetration test, Hex Security's agents works 24/7 to find and verify critical vulnerabilities so you can prevent them before attackers.
San Francisco, CA, USA1-50 employees
Hey Revia is a voice AI that handles complex phone calls for healthcare providers. Our software automates complex menus, reduces hold times, and handles tedious phone calls—verifying provider details, updating insurance info, and securing approvals. We offer Revia as web app, mobile app and API.
1-50 employees