Top Tech Startups in United States in 2026

Most backends were designed for a world where humans read every line of code before it shipped. Today, though, software is being written by developers and their agents together. Codebases are growing faster than any team can review them and the assumptions that used to hold everything together are quietly eroding. Convex was built to solve that. Convex is a reactive backend platform where correctness is the default, for humans and agents alike. Transactions are ACID so concurrent writes never corrupt data, everything is TypeScript end to end so a hallucinated field name is a build error not a production incident, and sync and caching are automatic so there's no glue code to subtly rot. The guarantees engineers used to enforce by reading every line, the platform enforces instead. We're a small, in-person team in San Francisco who care deeply about what we're building and who we're building it with. Application demands are changing faster than the infrastructure underneath them, and defining what the right platform looks like for this new world is still the domain of very talented humans. We want you to be one of them.

Pontera empowers advisors to see, trade, and manage client assets in 401k, 403b, 529, and other held away accounts. This empowers advisors to offer comprehensive, holistic services to their end clients, and enables end-clients to rest assured that the entirety of their portfolios are purposely directed. Pontera clients range from Fortune 100 financial services firms and large independent broker dealers, to small independent RIA’s and advisory firms. We recently raised a large round of capital from some of the world's top VCs and are aggressively growing our team.

Moloco was founded in 2013 by a team of machine learning and software engineers with expertise from Google, Oracle, Twitter, and Facebook. With its headquarters in Redwood City, California, Moloco has 15 offices across the US, UK, Korea, China, Japan, India, Europe, and Singapore.

Part baby monitor, part baby translator, part sleep guru, Nanit is the only smart baby monitor that gives parents sleep tracking and personalized sleep guidance so that their child can sleep better, and dream bigger.

Riskified is the AI platform powering the eCommerce revolution. We use cutting-edge technology, machine-learning algorithms, and behavioral analytics to identify legitimate customers and keep them moving toward checkout. Merchants use Riskified to increase revenue, prevent fraud, and eliminate customer friction. Riskified has reviewed hundreds of millions of transactions and approved billions of dollars of revenue for merchants across virtually all industries, including a number of Fortune 500 companies.

BlueVine is on a mission to empower small businesses with innovative banking* designed for them. Small businesses deserve accessible and modern financial services, and traditional banks have underserved them for too long. By combining industry-leading technology and security with our team's expertise and care, we help small businesses spend their time on what matters most—the next chapter of their business. Since 2013, we've provided small and medium-sized businesses with access to more than $5.4 billion in financing. As a top small business banking provider trusted by thousands of small business owners, we're proud to offer a full suite of tailored banking services, including a business checking account, line of credit, and invoice factoring. Headquartered in Redwood City, CA, and with offices in Salt Lake City, Jersey City, New Orleans, Tel Aviv, and Karmiel, we're hiring problem solvers and collaborators to help build a better financial future for small business owners. *BlueVine is a financial technology company, not a bank.

Stripe is a software platform for starting and running internet businesses. Millions of businesses rely on Stripe’s software tools to accept payments, expand globally, and manage their businesses online. Stripe has been at the forefront of expanding internet commerce, powering new business models, and supporting the latest platforms, from marketplaces to mobile commerce sites. We believe that growing the GDP of the internet is a problem rooted in code and design, not finance. Stripe is built for developers, makers, and creators. We work on solving the hard technical problems necessary to build global economic infrastructure—from designing highly reliable systems to developing advanced machine learning algorithms to prevent fraud.

Turo is a car sharing marketplace where guests can book any car they want, wherever they want it, from a vibrant community of local hosts across the US, Canada, the UK, France & Australia. Guests choose from a totally unique selection of nearby cars, while hosts earn extra money to offset the costs of car ownership. A pioneer of the sharing economy and the travel industry, Turo is a safe, supportive community where the car you book is part of a story, not a fleet.

Klaviyo (NYSE: KVYO) is the B2C CRM. Powered by its built-in data platform and AI, Klaviyo combines marketing automation, analytics, and customer service into one unified solution, making it easy for businesses to know their customers and grow faster. Klaviyo (CLAY-vee-oh) helps over 183,000 brands like Mattel, Glossier, Daily Harvest, and Liquid Death deliver 1:1 experiences at scale, improve efficiency, and drive revenue.

MongoDB is the leading modern, general purpose database platform, designed to unleash the power of software and data for developers and the applications they build. Headquartered in New York, MongoDB has more than 15,000 customers over 100 countries. The MongoDB database platform has been downloaded over 60 million times and there have been more than one million MongoDB University registrations.