Denver has quietly become one of the country’s most serious startup cities. In 2025 the metro’s tech sector pulled in roughly $4 billion in venture capital — a jump of about 68% over the prior year — and the ecosystem now employs more than 165,000 people across the Front Range. AI infrastructure, health tech, and climate tech are doing most of the heavy lifting, with AI companies alone capturing over $1.27 billion, about a third of all Colorado tech investment for the year.
This list ranks the ten companies generating the most buzz right now — measured by growth, recent funding, hiring, and the noise they’re making — rather than by lifetime capital raised. A billion-dollar raise sits next to a scrappy consumer brand, because both are pulling talent and attention into the city.
1. Crusoe Energy
If Denver has a breakout star, it’s Crusoe. Founded in the city in 2018 by Chase Lochmiller and Cully Cavness, the company started by capturing flared natural gas to power computing and has since repositioned itself as one of the most important AI-infrastructure players in the world. In October 2025 it closed a $1.38 billion Series E at a $10 billion valuation, with backers including Nvidia, Founders Fund, Fidelity, Valor Equity Partners, and Mubadala. By mid-2026 it was reportedly in talks for a pre-IPO round near a $30 billion valuation — roughly tripling in under a year. With more than 45 gigawatts of energy projects in development, Crusoe is arguably the single biggest reason Denver keeps showing up in national AI conversations.
2. Strive Health
Strive is rebuilding how kidney disease gets treated, using a value-based, AI-assisted model that catches problems earlier and keeps patients out of the hospital. In September 2025 the company raised a $550 million Series D (split between equity and debt) at a $1.8 billion valuation, led by New Enterprise Associates with CVS Health Ventures, CapitalG, and BlackRock-managed funds participating. Strive now supports more than 145,000 people with kidney disease and works with over 6,500 providers across all 50 states, making it one of Denver’s clearest health-tech success stories.
3. MagicSchool AI
MagicSchool has become the standout name in Denver edtech by tackling a very concrete problem: teacher burnout. Its AI assistant helps educators plan lessons, differentiate materials, and cut down on grading and paperwork. After a $15 million Series A in 2024, the company closed a $45 million Series B in February 2025 led by Valor Equity Partners, with Adobe Ventures and Smash Capital joining — bringing total funding to roughly $63 million. Fast district adoption and a genuinely viral product among teachers make it one of the city’s fastest-climbing software companies.
4. Frontera Health
One of Denver’s most talked-about newer launches, Frontera Health is applying AI to autism and behavioral care, with a focus on reaching underserved and rural families. It emerged in early 2025 with a $32 million seed round co-led by Lux Capital and Lightspeed Venture Partners, with Menlo Ventures, Bison Ventures, and Inspired Capital participating — an unusually large seed that signals how much conviction investors have in the team and the market.
5. VieCure
VieCure builds an AI-powered clinical intelligence platform for oncology, giving cancer care teams decision support and standardized, evidence-based treatment guidance. The Denver-area company raised roughly $43 million to expand its platform, riding the same wave of AI-plus-healthcare enthusiasm lifting Strive and Frontera. It’s a strong example of Denver’s growing depth in serious, clinically focused health tech rather than consumer wellness apps.
6. Two Boxes
E-commerce returns are a massive, unglamorous problem, and Two Boxes is building the software that warehouses and third-party logistics providers use to process them faster and recover more value. The Denver company has raised about $13 million to date and sits at the top of several 2026 rankings of the city’s most promising e-commerce startups. Its recent partnerships with fulfillment networks suggest it’s moving from promising tool to infrastructure layer for the returns economy.
7. Opopop
Proof that Denver’s momentum isn’t only enterprise software, Opopop is reinventing a category almost no one thought to touch: popcorn. Its Flavor Wrapped kernels coat the seasoning directly onto the corn, and the brand has built a genuine following. It has raised around $11.6 million from a notably fun cap table that includes Valor Siren Ventures, RXBAR founder Peter Rahal, and DJ Tiësto. In a city increasingly known for AI and health tech, Opopop is a reminder that consumer brands are still finding traction here.
8. Lin Health
Lin Health is taking on chronic pain — one of the most expensive and poorly served problems in American healthcare — with a virtual, whole-person model that blends coaching, community, and clinical support. The company raised an $11 million Series A to expand its platform, and its patient-centered approach to a huge, underserved population keeps it firmly on lists of Denver health-tech companies to watch.
9. Guild
Guild remains one of Denver’s marquee names. The company pioneered employer-funded education and upskilling, connecting large employers’ frontline workers to degree and credential programs, and it hit a $4.4 billion valuation at its 2022 peak. Like much of late-stage tech, its valuation has cooled since, and it has leaned harder into AI-driven career navigation and skilling. It belongs on this list as both an anchor of the local ecosystem and a company in an interesting second act.
10. Rachio
Rachio is Denver’s climate-tech elder statesman among consumer hardware, making smart irrigation controllers that cut outdoor water use — a real advantage in the increasingly dry Mountain West. Founded in 2013, it has raised north of $17 million (including backing from the Amazon Alexa Fund) and has spent the last decade building a durable brand around water conservation. It’s less about a fresh mega-round and more about steady, mission-driven growth in a category that only gets more relevant.
Honorable mention
Denver’s most famous recent graduate, Ibotta, has moved beyond startup status — it’s now publicly traded — but it remains a talent engine for the city, especially through its well-regarded associate software engineer program that funnels junior developers into the ecosystem. Keep an eye on it as an anchor that keeps producing founders and operators for the next wave.
A note on method: rankings reflect momentum as of mid-2026 — recent funding, growth, hiring, and public attention — not total capital raised or valuation alone. Figures come from company announcements and startup-tracking databases and can change quickly, so treat specific dollar amounts as point-in-time snapshots.
