Top Tech Startups in United States in 2026

Check is a payroll-as-a-service API that lets you embed payroll directly in your vertical SaaS, HR, or time-tracking platform. Our API abstracts away the complexities of running payroll: tax calculation, remittance, and filing, plus the movement of money between companies and employees. This enables companies to easily build fully integrated payroll products to offer to their customers. Check believes in a future where small business owners don’t have to think about payroll — it’ll simply be embedded in the platforms they already use to run their businesses. With the strong tailwinds of (1) the rise of vertical software and (2) the growth of embedded fin-tech at our back, Check is building the infrastructure to power that future, and ultimately we believe we’ll enable thousands of new platforms, millions of businesses, and hundreds of millions of workers.

Oklo is a California-based company developing clean energy plants to provide emission-free, reliable, and affordable energy using advanced fission. Oklo is a fast-growing startup with a history of reliable funding and milestones for more than 5 years. Oklo’s first product is a microgrid scale powerhouse. The powerhouse can produce clean energy for decades without needing to refuel, and also has the capability to turn nuclear waste into clean energy. Oklo received a Site Use Permit from the U.S Department of Energy, demonstrated fabrication of its fuel, was awarded fuel from the Idaho National Laboratory, and submitted the first accepted advanced fission license application to the regulator. Oklo has been featured in Popular Mechanics, Wired, Architectural Digest, Hyperallergic, POWER Magazine, and has been the subject of a Harvard Business School case, and was featured in the documentary The New Fire, among many other features.

Enigma builds world-class data infrastructure, developer-friendly APIs, and intelligent tools that radically transform how businesses interact with each other. By engineering better attributes from the ground up and telling a more complete story, we empower our customers with the confidence they need to automate key business decisions. We’re a team of curious, driven individuals with diverse backgrounds and skills, but we’re all passionate about engineering deeper understanding through data—together.

C3.ai is a leading enterprise AI software provider for accelerating digital transformation. The proven C3 AI Suite provides the comprehensive services to build enterprise scale AI applications 40x to 100x faster than alternative approaches. The core of the C3 AI Suite is a revolutionary, extensible, model-driven abstraction layer that dramatically enhances data scientist and application developer productivity. The C3 AI Suite supports any value chain in any industry with pre-built, configurable, high-value AI applications for predictive maintenance, fraud detection, sensor network health, supply network optimization, energy management, anti-money laundering, and customer engagement. c3.ai

When it comes to securing Industrial Operations environments, we believe humans should always be in the loop as actions in the cyber-physical world have real consequences. Threats are increasing faster than we can hire and train employees. We provide an intelligence augmentation platform that acts as your “cyber-sidekick”. Galvanick helps industrial companies secure their operations by reducing the time to detection of anomalous behavior on their most sensitive assets. The Galvanick cloud-native analysis platform aggregates telemetry from industrial environments and hosts systemic models that enable operators to quickly understand the difference between, and context around, both normal and abnormal behavior.

For many organizations, the most valuable asset is their data. Whether source code, product designs, customer records, financial results, or pricing models, every organization has information they don’t want to get in the hands of competitors, sold on darknet marketplaces, or exposed publicly. Keeping that data safe has been a challenge, until now. Cyberhaven gives organizations the tools to safeguard their data from theft or misuse. In the process, we’ve become the standard for Data Detection and Response (DDR), the category we helped create.

Omada Health is a virtual-first, integrated care provider. We combine the latest clinical protocols with breakthrough behavior science to make it possible for people with chronic conditions to achieve long-term improvements in their health. Working with over 1,600 enterprise customers – including Fortune 500 and small- and medium-sized employers, health plans, and health systems – Omada delivers personalized interventions for diabetes prevention and weight management, diabetes, hypertension, musculoskeletal issues and behavioral health. Our virtual care programs are clinically supported and evidence-based, and the results have been published in multiple peer-reviewed journals. We build programs that employees don’t just try, but stick with – resulting in reduced healthcare costs that deliver long term changes in health behavior and increased ROI. We're especially proud of the clinical results we deliver and the way we leverage technology to amplify and extend the influence of our real human care teams - from health coaches to clinical specialists. Omada has enrolled more than half a million members across all 50 states. Our partners include major employers across the country, including Costco and Iron Mountain, as well as leading health plans, such as Cigna and Kaiser.

- The first commission-free, high-frequency sports betting exchange, building the "Nasdaq of sports betting" - Recently closed a $6m seed round from YC, Lux, Soma, Paul Graham, Joe Montana, Innospark, the founders of Dropbox and Instacart, among many others - Looking for quant traders and researchers, SWEs, marketing, BD, operations, and product roles to work out of our NY office - Salaries at the top of benchmarks, with significant equity ownership and generous benefits - Founders are recent Harvard grads with quant experience at Jane Street and BoA and years of experience as sharp sports bettors - $300B annually bet on sports in the US and the size of the market is rapidly growing given the number of states legalizing sports betting - Currently the only way to bet is with retail sportsbooks which have egregious margins, discriminatory and inefficient practices, and a stale betting experience - Novig is a sports betting exchange that guarantees users the best lines by allowing them to bet directly against friends or the market, rather than against the house, making the betting experience more efficient, fair, and, most importantly, profitable

About Eight Sleep Eight Sleep is building an end-to-end predictive health platform, starting with the one place humans spend a third of their lives - the bed. Founded in 2014, we began by reimagining sleep as a trainable input to health and performance. Our flagship product, the Pod, turns the bed into an always-on lab, combining advanced temperature regulation, biometric sensing, and AI to optimize recovery, improve performance, and surface early signals for preventative action. Today, Eight Sleep has analyzed 1B+ hours of sleep data, serves customers across 30+ countries, and has recently raised an additional $100M to expand beyond sleep optimization into broader health prediction and intervention. Backed by leading investors including Founders Fund, Y Combinator, Valor Equity Partners, and HSG, we’re building the foundation for how people understand and improve their health every day - passively, continuously, and proactively. Learn more at eightsleep.com

Brex is building a first-of-its-kind solution to integrate the financial services and software that businesses need to be successful. While they build the future, we’ll be building everything they need to launch confidently and scale smarter. We are a hybrid company, optimizing for flexibility and connection. Our employees work remotely while coming to the office for a few coordinated days per week. We have offices in San Francisco, New York, Seattle, Salt Lake, Vancouver BC and Sao Paulo.