Top Internet Startups 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.

Named one of North America’s fastest-growing companies by Deloitte, We provide innovative ecommerce technology for businesses of all sizes. We believe Bold brands should have the ability to create and customize powerful transaction experiences — across all channels. Pepsi, Staples Canada, Vera Bradley, and Harry Rosen are among the 90,000+ brands in over 170 countries that trust Bold’s suite of ecommerce tools to power their online stores every day.

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.

Newsela provides school districts with authentic instructional content that supports their curriculum, empowers teachers across subjects to promote standards-based instruction, and drives student engagement and learning. Content is published daily at 5 reading levels and aligned to standards with student activities and teaching scaffolds designed to bring lessons to life. With over 20 million users, Newsela is already helping kids improve their reading skills in all 50 states and more than 150 countries. We're looking for passionate, creative people with quick minds and warm hearts to join us. If you believe that all students deserve a more rigorous, more personalized learning experience, please apply to join our team.

Sofar Sounds was founded from a rooftop concert in 2009 hosted by Rafe Offer. He had eight people come over and listen to musician, Dave Alexander, play. This hobby and desire for more personal performances founded Sofar Sounds. Sofar Sounds is about allowing people the opportunity to go to thoughtfully picked out performances in small venues in order to give people a more personal live experience. We connect thousands of artists and hosts to people who sign up. We are set up in 444 cities. Signing up is free, then you get emails inviting you to performances and from there you can buy tickets for the ones you wish you attend.

TripleLift makes native programmatic simple, scalable, and effective. Leveraging pioneering computer vision technology, TripleLift seamlessly transforms content like images and video into engaging in-feed native ads that that match the unique look and feel of a publisher’s website. Accessible via the industry’s first real-time, native programmatic exchange, TripleLift helps marketers reach millions of consumers across any device, at scale. Since 2012, TripleLift has delivered meaningful results for some of the world’s biggest brands through what it calls the next evolution of display advising. TripleLift was named 212 NYC and The New York Times Ad Tech Startup of the Year, and joined Forbes list of Most Promising Companies in America in 2015

The Onapsis Security Platform is the first SAP cyber-security solution that combines vulnerability, compliance, detection and response capabilities that traditional security solutions do not provide. The larger companies worldwide rely on Onapsis solutions because over 75% of all their transactions occur on business-critical applications, thus making data from these systems endlessly valuable to attackers. Through continuous monitoring, the Onapsis Security Platform delivers a real-time preventative, detective and corrective approach for securing SAP systems and applications.

Ellevation is the only software platform focused exclusively on ELL educators and the English Learners they serve. At a time when English Learners are the fastest growing population of students in the nation, educators have few tools or innovations to meet their needs. Ellevation partners with school districts to provide an instructional and data management platform focused on instruction, productivity, and collaboration. The platform enables educators to set goals aligned to standards, group students for differentiation, automatically generate an individualized language plans for English Learners, and move many reporting functions online. Over the last year, we increased revenue by 300% and the number of partner school districts by over 100%, and more than doubled the size of our team. We are well-capitalized, have an awesome and growing team, and are looking to add passionate, smart, fun and entrepreneurial folks to who are interested in building a high-impact company.

Lob is building a suite of APIs for the enterprise. Built with developers in mind, Lob provides tools that allow businesses to build scalable and powerful applications. The most popular API is a print and mail API that enables companies to send postcards, letters, checks, and more as effortlessly as sending emails. Lob is based in San Francisco, CA and is venture backed with over 6000 customers including Intuit, Square, and Counsyl. Find out more about Lob and what we’re up to by following our blog: lob.com/blog and visiting our website: lob.com. 

Tapcart is a SaaS platform that enables ecommerce merchants to launch and manage mobile apps for their brand. As the market leader in mobile ecommerce, we focus on providing great experiences for our customers and for mobile shoppers worldwide. Our platform powers the mobile apps of some of the largest shopping brands, including Fashion Nova, Chubbies, The Hundreds and many more. We are inspired by the future. We work to inspire the future. Recently featured at Shopify UNITE, Google I/O and in The Verge, Tapcart is trusted by over 5,000 brands to launch and manage their mobile apps.