Top Tech Startups in California, US in 2027

Orion builds a smart mattress cover that tracks your sleep and uses water to cool and heat your body to the perfect core body temperature cycle. We design our product entirely in-house and control every aspect of the product experience from the app to the factory processes to stitch the fabric. We launched our product at the start of the year and are the fastest-growing consumer hardware company by revenue. Orion is an extremely experienced team of repeat founders with multiple 9 and 10-figure exits in consumer products and healthtech. The team has a combination of technical, marketing, product, operational, manufacturing, and sleep science expertise.

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.

Ivo was founded by a contract attorney and built by a team of lawyers, technologists, and operators with deep experience in contract work. We've experienced firsthand how manual, fragmented contract workflows slow down business, introduce risk, and drain legal teams. That perspective informed our flagship product: an AI-powered redlining tool that helps teams move faster—without compromising legal judgment. Since then, Ivo has grown into a broader platform, serving not just in-house legal teams, but also procurement, sales, and other key business functions. In addition to AI redlining, our suite includes a smart repository for organizing and managing contracts, and a powerful agentic assistant that helps teams get answers fast—always backed by source-grounded context. Originally founded in New Zealand and now headquartered in San Francisco, Ivo is backed by top-tier investors and trusted by global enterprises and fast-growing startups. We’re proud to support some of the most innovative teams in the world at companies like Pinterest, Quora, and Canva—and we’d love to support yours, too.

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PracHub is your comprehensive platform for technical interview preparation, featuring thousands of real interview questions from top companies, expert solutions, and a supportive community to help you land your dream job.

Zyaku is the creator-owned internet. Creators and independent journalists publish comics, motion comics, journalism, podcasts and short video in many languages, keep working when networks fail, and get paid wherever they live.

daydream is a platform that automates programmatic SEO, end-to-end. The platform helps businesses identify search patterns, creates content at scale, and automatically improves that content. We've raised $2.5M from leading investors like Basis Set Ventures, WndrCo, SOMA Capital and current and former Heads of Growth/Product Growth at companies like Notion, Airtable, Webflow and Dropbox. Our customers include Product Hunt, Notion, Tome and other venture-backed companies. We're on a high-growth trajectory and we're looking for people who want to join us on the journey to building a billion-dollar company. Our team previously worked together at Flixed, a startup we bootstrapped to $2M+ in revenue almost purely on the back of programmatic SEO.

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