Top 20 New and High-Growth Tech Companies in California (2025–2026)
- Anthropic – AI research and system developer rivaling OpenAI, massively funded and expanding in SF.
- OpenAI – One of the biggest AI labs globally, with major investments and ongoing product leadership.
- Anysphere – Built the popular AI coding tool Cursor, with huge funding and industry traction.
- Mercor – AI hiring and training data platform scaling fast with multi-billion-dollar valuation.
- Together AI – Infrastructure and tools for training/deploying generative AI models.
- Thinking Machines Lab – AI startup founded by ex-OpenAI CTO Mira Murati with major funding.
- Surge AI – Leading data annotation and human-in-the-loop AI training company.
- Emergent – “Vibe coding” AI platform enabling non-programmers to build apps.
- Eudia – Legal AI platform assisting corporate legal departments with AI workflows.
- Moov Financial – Fintech and payments API startup on Built In’s California list.
- Hex – Data analytics and BI platform gaining traction in California tech recruitment lists.
- Opto Investments – Fintech platform for private market investing solutions.
- Sonatus – AI-driven automotive software enabling software-defined vehicles.
- Aceable – Edtech mobile platform growing in usage and team size.
- Eve Legal Tech – Legal AI workspace improving plaintiff-side law firm technology.
- Red 6 – Augmented reality company for synthetic air combat and defense tech.
- Deepgram – Voice AI and speech recognition technology.
- Mocha Health – Healthtech telehealth startup on California’s rising list.
- TruthMD – Scaling startup highlighted among high-growth California ventures.
- Vision Precision Holdings – Rapidly growing startup featured on California scaling lists.
Why Do These Matter?
These companies stand out based on recent funding rounds, rapid growth, high valuations, or industry disruption — particularly in AI, developer tools, fintech, health tech, data analytics, and legal tech. Many have raised significant capital in 2025–2026 or appeared on lists tracking the fastest-moving startups in California’s tech ecosystem.
Trends in California’s Tech Scene
- AI dominates: Many top startups are in AI infrastructure, models, or data training.
- Vertical niches rising: Legal AI, automotive AI software, fintech APIs, and AR/VR are gaining traction.
- Funding boom: A disproportionate share of U.S. venture capital still flows to California.
