Top Tech Startups in California, US in 2027

Intercom is the world’s first customer platform helping internet businesses accelerate growth. Thanks to the internet, the way people communicate is drastically different than it was 10, even 5 years ago. Messengers like WhatsApp have become the preferred mode of communication in every aspect of consumers’ lives, and now that switch is happening with businesses too. Intercom builds a suite of messaging-first products that all modern internet businesses can use to accelerate growth across the customer lifecycle- from acquisition, to engagement, and support. Today more than 25,000 businesses, including New Relic, Sotheby’s, and Shopify, use Intercom to connect with a billion unique people worldwide.

The largest online marketplace offering artistic flower arrangements from top local florists across the country. Matched with exceptional service, each original design is made and delivered by hand to recreate the in shop customer experience.

Honor, a home care company, is the founder of the Honor Care Network, a pioneering national network of home care providers. Honor is the first company ever to bring scalable workforce management and technology expertise together with the high-touch, personalized care of local homegrown care agencies. Working with Care Network Partners, Honor helps older adults live safely and comfortably in their own home by enabling reliable, transparent, high-quality care. Founded in 2014, Honor is now one of the fastest-growing, non-medical home care companies in the U.S., currently providing care to families in California, Arizona, Texas, and New Mexico.

Trunk is an a16z backed startup founded by a team of senior and staff engineers from Uber and Google. From first-hand experience, we knew that top tech companies rightly treated developer experience as a mission-critical competitive investment. But hiring full-time developer tools and developer experience teams, as the biggest companies do, isn’t a scalable solution. From one-person hobby projects to 800-person engineering juggernauts, we’re building the rock-solid tooling solution every team needs. Maintaining development velocity is impossible when you’re constantly babysitting pull requests. Putting your product roadmap on hold to triage a sick repo shouldn’t be a regular occurrence. Because the treatment for death by a thousand paper cuts isn’t a thousand band-aids. Enter Trunk. No, we didn’t invent trunk-based development—but we’re here to accelerate it.

We eliminate tens of thousands in upfront data expenses, while giving you the instant flexibility to pick up real-time full exchange feeds or terabytes of historical data when you need it. Whether you're a Fortune 500 bank or a single-person startup, we scale with your budget and needs to deliver the same cutting edge performance and data integrity. For more info, visit databento.com

Pyka’s goal is to provide society with a new form of safe, clean, and cost-effective transportation enabled by autonomous electric aviation. To get there, we’re taking a different approach than most. We're applying our technologies to every industry where autonomous electric aircraft can be useful, starting with the highest value and most dangerous jobs. In doing so, we're building game-changing products manufactured at scale, while perfecting the safety, reliability, and capabilities of our autonomy engine and electric propulsion systems. We design, develop and manufacture an ecosystem of technologies including proprietary flight control software, avionics, high power density motors, motor controllers, batteries, and custom carbon-fiber composite airframes. Today, we supply autonomous electric aircraft for cargo transport and crop protection to real-world customers across four separate continents and have secured industry-first regulatory approvals from the FAA. Both vehicles are highly economical to operate, easy to deploy, and significantly reduce C02 emissions in their respective industries. What you work on at Pyka makes people’s lives better now and brings the future of electric aviation one step closer each day. We foster a welcoming community within our company that promotes experimentation, asking questions, making simple solutions to complex problems, and expressing different views and opinions. We are a transparent company both internally and externally and do not believe in operating in “stealth mode.” Lastly, we don’t work 60 hour weeks, and don’t expect you to either. In this role you will have a great deal of responsibility, earn a competitive salary and benefits,  and contribute to the development of groundbreaking technology.

We're building the Android of self-driving cars — think Tesla Autopilot for the top selling cars in America, like Hondas and Toyotas. The comma fleet is 20k users who've driven over 200M miles. We build openpilot. We build the hardware openpilot runs on. Learn more at comma.ai, check out our GitHub (github.com/commaai/openpilot), or say hello on Discord at discord.comma.ai. Looking for a job? Try our challenges at comma.ai/jobs.

Point is the first FinTech platform where homeowners can sell equity in their homes, giving investors access to a new asset class – owner-occupied residential real estate. Historically, the only way a homeowner could unlock the wealth in their home was to take on further debt. Now with Point, they can de-leverage and diversify their wealth so they can invest in their small businesses, make home repairs, pay off debt, or go back to school. Point is the first consumer finance product that is truly aligned with the customer. When the homeowner does well, Point and its investors do well. We are a well-financed, fast-growing startup backed by top investors like Andreessen Horowitz, located in downtown Palo Alto just minutes from Caltrain. Point's founders have previously co-founded TrialPay (acquired by Visa), Yub (acquired by Coupons.com), Metails (acquired by Buy.com), SiteAdvisor (acquired by McAfee), Affirm, SendGrid (acquired by Twilio), and TXN (aquired by Envestnet).

At Paystand, we’re not just another fintech company—we’re trailblazers in decentralized finance (DeFi), transforming how businesses manage their finances. With thriving hubs in Santa Cruz, San Francisco, Austin, Minneapolis, Mexico City, Hermosillo, and Guadalajara, we’re leading a global revolution in financial systems. Recognized on the Inc. 5000 list for five consecutive years, we’re among the fastest-growing companies reshaping the future of finance. Our Expanding Ecosystem: Paystand isn’t just a company—it’s a growing global network. With the strategic acquisitions of Teampay, a leader in spend management, and Yaydoo, a top AR and AP platform in Latin America, we’re building an expansive ecosystem designed to revolutionize financial operations and fuel business growth worldwide.

We believe people are at their best when they’re living free from the burden of energy costs. The sun is the energy source of all life on earth, yet humanity captures almost none of what if offers. To close that gap, Optivolt builds solar systems that think — designed with aerospace power electronics inside to make solar more powerful, reliable, and cost effective than ever. Optivolt's Breakthrough: We realized deep integration between solar panels and power electronics unlocks an entirely new design space for innovation. This led us to inventing the Power Balancer (19 patents issued, 27 pending), an advanced power electronics device which embeds inside solar panels. Balancers work by shuffling power from stronger to weaker zones in the panel to keep power flowing, maximizing energy output and reliability. Performance vs. $8B market leader: • Up to 6x higher power output in real-world conditions • 40% lower equipment cost, 50% faster to install • 4x less failure points, while eliminating hotspots (#1 solar failure mode) Optivolt's development is funded in part by the U.S. Department of Energy.