Top Tech Startups in California, US in 2027

Surfn AI is a bootstrapped AI SaaS startup helping businesses, marketers, and creators turn audience interest into meaningful engagement, leads, sales, and insights. We built Surfn around a simple problem: people visit websites, landing pages, social posts, newsletters, and other digital touchpoints because they're interested. But when they have questions, need personalized guidance, or aren't ready to take the next step, they're often left to figure things out on their own. That gap between interest and action is where potential conversions are lost. Surfn makes marketing funnels conversational. Our no-code platform makes it easy to build beautiful, on-brand AI agents that bring the helpful guidance of a sales rep, advisor, or product expert directly into these moments. Unlike traditional chatbots that primarily answer questions, Surfn agents can personalize guidance, capture and qualify leads, recommend products and content, book meetings, gather insights, and guide people toward action. They can be shared as branded AI Agent Pages through links and QR codes or embedded across websites and other marketing experiences. We're a small, founder-led team with paying customers and early market validation. We're now focused on growing Surfn, reaching new audiences, and building a talented team that's excited about the future of AI. We value creativity, curiosity, independent thinking, and taking ownership. We're looking for people who want to contribute ideas, develop their skills, and grow alongside us as we build the future of conversational marketing.

NodixAI is an enterprise AI systems engineering firm focused on helping organizations move AI from experimentation into production. We design and build secure AI systems that connect with existing enterprise applications, data platforms, workflows, and infrastructure. Our work includes: • Enterprise knowledge systems and RAG • AI agents and workflow orchestration • Data and AI integration • AI-enabled applications and product engineering • Secure and governed AI deployments • Production AI engineering and operations We work with mid-market and enterprise organizations that need AI solutions to operate reliably inside real business environments—not isolated demos or standalone chatbots. Our approach combines AI expertise with enterprise architecture, cloud, data, security, integration, and production engineering. NodixAI is building a senior-led engineering organization designed to work closely with customer technology teams from discovery and architecture through implementation and production deployment.

Uplane (YC F25) replaces marketing agencies with AI. We generate hundreds of ads with matching landing pages and steer the ad spend across channels like Meta, Google, LinkedIn and others. By connecting to CRM and ERP data, Uplane learns what drives profits and continuously improves campaigns. Companies waste billions on bad ads, mismatched landing pages, and poor budget allocation. Uplane fixes this by replacing a patchwork of agencies, spreadsheets, and siloed tools with one self-improving system. The result: Higher ROAS for enterprises and effortless, expert-level marketing for SMBs.

Absentia Technologies builds enactive AI, intelligence grounded in perception and action in the physical world, beginning with vision. Our first product, MYSTIC, restores degraded video in real time through fog, smoke, low light and glare, and it runs on the cameras a site already owns. MYSTIC models the physics of how fog, smoke and low light degrade an image and reverses that degradation, so it recovers detail the camera captured and never invents any. It also recognizes the objects in a scene and how they behave, which lets operators track and search footage by typing what they are looking for in plain language. We serve defense and ISR teams, along with commercial surveillance operators, who need to see clearly in the conditions where cameras fail most. For first-responders, military and teams whose footage can end up with police, investigators, or insurers.

At HopeAI, we're on a mission to bring hope to patients by accelerating the clinical development of life-saving treatments. We believe AI can transform clinical development, helping bring life-saving medicines to patients faster and more efficiently. Our approach centers on creating an integrated workspace where specialized AI agents work alongside clinical development teams, enabling swift, data-optimized decisions throughout trial design and execution. This enhances the probability of success and expedites time to market. We envision a future where all promising drug candidates can be efficiently tested through AI-powered clinical trials and made readily accessible to patients in need.

Sponsor a Pet is a fundraising platform, dedicated to providing Animal Non-Profits a platform to share their stories and help raise the necessary resources to save the lives of animals. We do this by working together with passionate local organizations to amplify our impact in communities as we come together as one. The mission of Sponsor a Pet is to provide every animal a loving environment that they can call home. Every animal deserves the opportunity to have their basic needs met; food, medicine, a safe and loving family. Our overarching goals are to eliminate Kill Shelters, Animal Abuse, and the destruction of their habitats. We strive to share stories of positivity, laughter, uplifting stories, animals who need our help, and to give thanks to the volunteers who work tirelessly to help find these animals find their forever home. If this resonates with you, join our team and lets grow our community! Who We Are We are passionate individuals who came to together under a common vision to help all animals. We understand working together, moving in the same direction will have a greater impact. Sponsor a Pet provides an audience across the country that local non-profits do not have access to. As we come together we can create a lasting impact in all of our communities. How to get Involved Singing up as one of our members as a PetStar is a great Start. On top of that, there’s much more you can do to get involved. The easiest way is to share your story with us. We would love to hear from you and share your story. What drives your passion for animals and a little about your background. Another way would be to share local organizations that need our help, or local communities who would want to get involved. Our goal is to provide a platform for animals, non-profits, Individuals, and companies alike.