Top Tech Startups in California, US in 2026

World's first AI Accountant to keep books, file taxes and manage compliance

We do: -Peer learning -Mentor learning -Curriculum and resource curation -Technology -Retreats -Other experiences

Actively transforms revenue teams from human-led execution to Intelligence-Led Revenue — a new way of running revenue where AI agents do the work humans cannot sustain at scale. Its platform deploys one dedicated agent per account, working 24/7 in the background to research, identify opportunities, and advance next steps without being asked. Founded by former Stanford AI researchers, Actively is backed by top investors, including TCV, First Harmonic, and Bain Capital Ventures. To learn more, visit actively.ai.

We are a world-class experience marketing agency and event production company, guided by the principle that the right moment will transform someone forever. We create distinct and data-driven experiences rooted in cultural context to convert consumer attention into action, sales, and absolute bran

For the past decade, Namecoach has worked with universities, enterprises, and global platforms to help people pronounce names correctly across languages and cultures. And we built the largest verified pronunciation dataset of its kind, combining human recordings, phonetic transcription, and machine learning. We're now building Euphonia (euphonia.namecoach.ai), a pronunciation intelligence platform for voice AI. Voice agents are proliferating, but they all break on the same problem: names and out-of-vocabulary words. A patient relations agent mispronounces a drug name. An enrollment assistant butchers a student name. Voice agents lose trust the moment they get a word wrong, and the TTS providers building these models can't easily fix it. Our pronunciation data, verified by humans across languages for over a decade, is a critical proprietary asset which Euphonia turns into a drop-in pronunciation layer for any voice agent or TTS product. Universities, Fortune 500 enterprises, and major sports organizations rely on us today. We're now building the pronunciation layer voice AI needs tomorrow.

Give Lively is a tech company reimagining the future of nonprofit fundraising. Founded in 2015 on the belief that nonprofits, no matter their size, should not sacrifice their means to satisfy their missions, we build powerful and practical fundraising solutions that are free for nonprofits and intuitive for donors. Our dedicated and diverse team collaborates directly with nonprofits to develop tools that serve their needs and disburden them of for-profit fundraising software. Our free mobile-ready tech includes online appeals, event- and peer-based campaigns, donation by text, paying via digital wallets and much more. Nonprofits using Give Lively have raised more than $500 million for their critical work, saving $45+ million in tech fees and charges.

Kick Health helps smart, capable professionals overcome the fears that hold them back from being the very best versions of themselves. Our personalized telemedicine service offers easy access to sleep medicine and beta-blocker prescriptions, the insider's edge to blocking nervous symptoms like racing heartbeat, shaky hands, or trembly voice. Kick is partnered with leading experts from Stanford, Yale, and Harvard in psychiatry, medicine, and emotional fitness.

We’re the most active seed-stage venture firm in the country – and collectively our partners have helped fund and start over 200 companies, so there’s not much we haven’t seen before. We believe in collective teamwork: each portfolio company gets the support of the entire First Round Capital family, not just one board member.

Botco.ai is a conversational AI platform built for healthcare and life sciences. We help enterprise teams deploy intelligent chat experiences that drive patient engagement, generate leads, and surface insights — all within a HIPAA-compliant infrastructure. We're a lean, remote-first team moving fast on hard problems. Botco.ai empowers businesses from a range of industries to deliver exceptional, trustworthy customer experiences that generate high quality pipeline, increase sales conversions, and accelerate revenue. Recipient of the Arizona Innovation Challenge "Most Outstanding Startup" award, best SaaS platform from the Arizona Commerce Authority (ACA), the TiE50 Award, and others, Botco.ai is transforming the way businesses communicate with their prospects and customers. For more information, visit botco.ai.

We are a tech consultancy, working with big fitness brands to design and build next-level fitness technology. We're entrepreneurs, having started 3 product-tech companies and 1 prior consultancy. We're ex-Silicon Valley and ex-Google. We're hands-on designers and product people who are passionate about the details and love creating epic product experiences. We are tri-coastal and nomadic -- living in inspiring places, traveling freely, and working with influential clients all over the world. Oh, and of course, we love working out. Join us to help build the next gen of epic fitness tech.