Top Tech Startups in United States in 2026

GPTZero is building an internet for humans, by humans. Our goal is to build the verification layer for the world’s information. Our initial launch and call for AI transparency captured the nation’s attention. We’ve been covered on the front page of the NYT, WSJ, WaPo, Fox, NPR, and CNN, 6x on the BBC, and internationally in 30 countries. Our team comes from high-performing engineering cultures, including Uber, Meta, Microsoft, Affirm, and leading AI research labs, including Princeton, Caltech, Vector, and MILA. We are working on novel models and pushing cutting-edge research to production, including AI detection, AI hallucination detection, retrieval augmented generation, and writing stylometry to over 3 million active users, and enterprise clients including Fortune 1000 and Unicorn AI companies. We are backed by some of the best in the valley, including Uncork, Neo, Altman Capital, and in journalism, including Mark Thompson (CEO of NYT, BBC, CNN) and Tom Glocer (CEO of Reuters) who defined a generation of quality digital information. Underneath the headlines, we are a nerdy and fun-loving group looking for people who are passionate about our mission to join us!

Tasklet is building the AI platform companies use to run their business on agents. Our customers describe an outcome in plain English, and Tasklet gets the work done—across SaaS tools, APIs, browsers, files, spreadsheets, and internal systems. Agents can respond immediately or run business processes in the cloud 24×7 on a schedule or in response to events. Every Tasklet agent gets its own cloud computers, filesystem, database, and browser. Tasklet agents are built to do real work at real companies where many people are involved in each function. Teams share agents, knowledge, connections, and conversations, while administrators control access, behavior, and spend. Tasklet users can choose among models and delegate work to faster, cheaper ones—giving companies one flexible platform instead of a growing pile of disconnected AI seats. We compete with ChatGPT Work and Claude Cowork. OpenAI and Anthropic have their own models, massive funding, and existing distribution. We have a small, exceptional team, the freedom to use the best AI tech from any vendor, and a laser focus on the problems of real-world businesses where making agents simple, trustworthy, and easy to control matters just as much as making them intelligent. The labs will define what intelligence can do, but Tasklet will define how businesses put that intelligence to work.

Chapter One helps service professionals grow with comprehensive business support, including funding, AI automation, lead generation, sales training, and marketing materials. Our mission is to empower home service providers to become successful business owners, whether established or just starting out. Chapter One-backed businesses span all major cities in the nation - apply today!

Traba is building a world where the global supply chain operates at peak efficiency. We connect industrial businesses with reliable workers to fill open shifts and empower both businesses and workers to reach their full productivity and potential.

We are a global decentralized cloud computing services company

Counsel offers 24/7 physician-led, AI-enhanced medical advice

A new kind of CRM.

Caro is the single source of truth for headcount that aligns finance, recruiting, and hiring leaders. As companies scale, the cost of the team (headcount) becomes their greatest expense (75%+ of spend for tech companies). Consequently, finance teams need to be vigilant about monitoring these costs. However, recruiting teams and hiring leaders are incentivized to hire quickly to ensure teams are sufficiently staffed so that they can deliver on their goals. This creates a tension between hiring velocity and spend management - a problem that exists in every company, resulting in hundreds of spreadsheets to reconcile data between the different teams and their different systems involved. Caro is backed by tier 1 investors: Accel and Lightspeed. We're proud to be trusted by leading tech companies like Affirm, Discord, and Intercom.

Mercor partners with leading AI labs and enterprises to train frontier models using human expertise. With a talent network of more than 30,000 people across hundreds of domains, Mercor is building a new category of work where expertise powers AI advancement. While computing power and engineering talent have advanced rapidly, AI models can only improve when they learn from real human expertise across disciplines like law, medicine, coding, and finance. Mercor bridges this gap by connecting top professionals with frontier AI labs, enabling them to share insights, provide expert feedback, and shape the reasoning capabilities of next-generation models. Backed by $350 million in Series C funding led by Felicis, with Benchmark, General Catalyst, and Robinhood Ventures, Mercor is now valued at $10 billion. At its core, Mercor’s culture thrives on impact, agility, and growth. Mercor powers its teams to build at the frontier of technology.