Top 10 Startups in California in 2026: Full List, Funding, and Facts

California is still the place to watch. That hasn’t changed in twenty years. What has changed is the scale. The state’s startup scene has gone all-in on artificial intelligence, and the valuations prove it. Five years ago, hitting $10 billion made you a headline. Now some of these companies are closing in on trillion-dollar price tags before they’ve sold a single share to the public.

Here’s the thing nobody tells you when you’re grinding away on your own startup: the numbers at the top get so big they stop feeling real. A $65 billion funding round used to be a punchline. Today it’s a Tuesday. So let’s get into it: the ten startups in California actually moving the needle right now, the real funding numbers, the founders behind them, what they’re building.

Why California Leads the Startup World in 2026

Ask anyone who’s raised money in the last three years and they’ll tell you the same thing. The Bay Area still runs the table. Nine of the ten companies on this list sit within about 50 miles of San Francisco. The tenth is just down the coast in Costa Mesa. Not exactly a coincidence.

Why does it stay this way? Money, mostly. Investors dumped more cash into AI deals in the first quarter of 2026 than the entire industry raised in any full year before 2024. One quarter beat entire years. And a single round from one San Francisco company can now eat up close to half of all AI funding in a given three-month stretch.

Add in the talent pipeline from Stanford and Berkeley, plus the density of venture money along Sand Hill Road, and you get a flywheel that’s hard to break. The reality is, competition for engineers, compute, and office space has gotten brutal because of it. Some companies open satellite offices elsewhere just to find room to breathe. But the headquarters, and the big decisions, stay in California.

Top 10 Startups in California in 2026

1. OpenAI

OpenAI closed a $122 billion round on March 31, 2026. That pushed its valuation to $852 billion, the largest private funding round in history. Amazon, Nvidia, and SoftBank anchored the deal, with Microsoft still along for the ride. It followed an earlier $110 billion tranche the company had announced back in February.

ChatGPT now serves more than 900 million weekly users and over 1 billion monthly app users. Enterprise revenue is catching up fast, expected to match consumer revenue by the end of 2026. Codex, their coding product, grew its weekly users five times over in just three months. Founded in San Francisco back in 2015, OpenAI is reportedly gearing up for an IPO. But CEO Sam Altman and CFO Sarah Friar have both hinted the listing might slip to 2027.

2. Anthropic

Anthropic makes Claude, and it’s arguably the fastest-growing startup in California right now. On May 28, 2026, the company closed a $65 billion Series H round at a $965 billion post-money valuation. Altimeter Capital, Dragoneer, Greenoaks, and Sequoia Capital co-led it. On top of that, Google has committed $40 billion to the company total.

Here’s the kicker: Anthropic’s run-rate revenue crossed $47 billion that same month. Back in December 2024, it was sitting around $1 billion. That’s not gradual growth, that’s a rocket ship. Eight of the Fortune 10 now run Claude in production, and over 1,000 enterprise accounts each spend more than $1 million a year on it. Claude Code, the agentic coding product, hit $2.5 billion in annualized revenue by February 2026 alone.

3. Databricks

Founded in 2013 by seven UC Berkeley PhD students, Databricks has quietly become one of the most important data and AI companies on the planet. In December 2025, it closed a $5 billion Series L round at a $134 billion valuation, plus another $2 billion in debt capacity for good measure.

By February 2026, annualized revenue hit $5.4 billion, up 65% year over year, and the company stayed free-cash-flow positive the whole time. A lot of AI-era unicorns are burning cash to buy growth. Databricks isn’t. Its AI products alone crossed a $1 billion revenue run rate, and more than 20,000 organizations use the platform, including Adidas, AT&T, and over 60% of the Fortune 500. By June 2026, reports surfaced that Databricks was in talks for a new round that could value it between $165 billion and $175 billion.

4. Anduril Industries

Palmer Luckey founded Anduril in 2017, and defense tech was not exactly a hot category back then. It is now. On May 13, 2026, Anduril raised $5 billion in a Series H round led by Thrive Capital and Andreessen Horowitz, doubling its valuation to $61 billion in less than a year.

The Costa Mesa company builds autonomous drones, missile systems, undersea sensors, and its Lattice software, which pulls in real-time data from thousands of sensors at once. Revenue doubled to $2.2 billion in 2025. It’s raised more than $11 billion total since day one. And it’s not slowing down on infrastructure either: Anduril is building a $1 billion, 1.18-million-square-foot manufacturing campus in Long Beach and Lakewood, expected to bring around 5,500 jobs when it opens in 2027.

5. Scale AI

Scale AI built its business labeling the data that trains other people’s models. OpenAI, Google, the Department of Defense, they’ve all used Scale’s infrastructure. In June 2025, Meta bought a 49% non-voting stake in the company for $14.3 billion, pushing Scale’s valuation to $29 billion.

The deal came with a twist. Founder Alexandr Wang left to lead Meta’s superintelligence efforts, and Jason Droege, a former Uber executive, stepped in as interim CEO. Founded in 2016 through Y Combinator, Scale is projected to cross $1 billion in revenue in 2026, helped by a $500 million Pentagon contract for Project Thunderforge, awarded in May 2026, and a spot on the $185 billion Golden Dome missile defense program alongside Palantir.

6. Waymo

Waymo is Alphabet’s self-driving unit, based in Mountain View, and it just pulled off the largest funding round ever for an autonomous vehicle company. In February 2026, it raised $16 billion at a $126 billion post-money valuation. Dragoneer, DST Global, and Sequoia led the round, but Alphabet stayed the majority investor, putting in more than three-quarters of the total itself.

The numbers on the ground are wild. Waymo delivered more than 450,000 paid rides per week by the end of 2025, tripling its 2024 trip count to 14 million rides. It’s crossed 20 million lifetime rides, with 90% fewer serious injury crashes than human drivers. Waymo now runs in San Francisco, Los Angeles, Phoenix, Austin, Atlanta, and Miami, and it’s expanding into more than 20 new cities this year, including its first two international markets: Tokyo and London.

7. Perplexity AI

Aravind Srinivas, who used to work at OpenAI and DeepMind, started Perplexity in 2022 with a simple pitch: search is broken, and AI can fix it. In April 2023, the company was worth $121 million. By early 2026, following its Series E-6 round, it hit somewhere between $20 and $22.6 billion.

Annualized revenue climbed past $450 million by March 2026, and the answer engine now handles hundreds of millions of queries a month. Investors include Nvidia, Jeff Bezos personally, and SoftBank’s Vision Fund. In January 2026, Perplexity committed $750 million to Microsoft Azure just to lock down GPU capacity. And in February, it dropped advertising entirely, betting the whole business on subscriptions and its Comet browser instead.

8. Rippling

Parker Conrad and Prasanna Sankar founded Rippling in 2016, building a platform that unifies HR, IT, and finance tools under one roof. In May 2025, the company raised a Series G at a $16.8 billion valuation, up from $13.5 billion just a year before.

By March 2026, annualized revenue crossed $1 billion, growing 78% year over year. More than 20,000 customers now use Rippling across payroll, benefits, and corporate cards. But it’s not all smooth sailing. Rippling is locked in active litigation with rival Deel over allegations of corporate espionage and trade secret theft, a case that survived multiple attempts at dismissal in a February 2026 federal court ruling.

9. Notion

Ivan Zhao and Simon Last founded Notion back in 2013, and the company took its time. It went four years without raising new primary capital, choosing tender offers instead. In December 2025, an employee share sale valued the company at $11 billion, just a hair above its 2021 mark.

The patience paid off. Annual recurring revenue hit somewhere between $500 and $600 million in 2025, climbing fast as Notion leaned into AI agents that can handle multi-step projects on their own, plus enterprise search across connected tools. More than half of the Fortune 500 use Notion now, including Amazon, Pixar, and Toyota. People are starting to talk about a 2026 or 2027 IPO.

10. Hippocratic AI

Munjal Shah, a serial entrepreneur, founded Hippocratic AI to build patient-facing AI agents that don’t diagnose and don’t prescribe. Just handle the busywork: appointment scheduling, chronic care follow-up, post-discharge outreach. In November 2025, the Palo Alto company closed a $126 million Series C at a $3.5 billion valuation, led by Avenir Growth with backing from Google’s CapitalG, General Catalyst, and Andreessen Horowitz. Total funding now sits at $404 million.

The company built its own safety framework, called the Polaris Safety Constellation Architecture, and it’s paying off in the numbers. Hippocratic AI has completed more than 115 million patient interactions without a reported safety incident. It now partners with more than 50 health systems across six countries, including Cleveland Clinic and Northwestern Medicine.

What These California Startups Have in Common

A few patterns jump out once you look at these ten together. First, AI touches nearly all of them, whether it’s the whole product, like Claude or ChatGPT, or the engine underneath, like Scale AI’s training data or Waymo’s driving software.

Second, valuations are moving faster than anyone predicted. Several of these companies more than doubled in a single year. That’s not normal.

And third, an IPO wave is building whether Wall Street is ready or not. Databricks, Anthropic, OpenAI, Notion, and Anduril have all been floated as likely candidates for 2026 or 2027 listings. If even half of them go public in the same window, it’ll be one of the biggest stretches of tech IPOs in over a decade.

Final Thoughts

This list moves fast. It always has. Given how quickly these valuations are shifting in 2026, it’s worth checking back every few months just to keep up. What’s clear right now is that California, and the Bay Area especially, is still the center of gravity for the AI economy. These ten companies are setting the pace for everyone else.

Will they still be on top a year from now? Honestly, who knows. But if the last twelve months taught us anything, it’s that the next wave of California startups worth watching is probably out there raising money right now, quietly.