Global accounting and consulting firm Deloitte released its 2025 Technology Fast 500 list, which ranks the fastest-growing technology companies across North America. The 31st annual list featured 86 companies from the San Francisco Bay Area. Last year’s list also featured 85 companies.
“The Bay Area’s vibrant technology scene continues to create outstanding opportunities and drive remarkable progress,” Alison Hagan, Deloitte’s San Francisco managing principal, said in a statement. This year’s Deloitte Technology Fast 500 honorees exemplify the spirit of perseverance and ingenuity that keeps our region at the forefront of the industry. We’re proud to recognize the growth of these companies that help advance our dynamic business ecosystem.”
Featured companies were selected based on their fiscal year revenue growth between 2021 and 2024 and ranked according to their percentage growth rate. Overall, this year’s list included Bay Area companies that achieved revenue growth ranging from 122 to 19,939 percent over those three years. Various technology, media, telecommunications, life sciences, fintech and energy tech companies are represented on the list.
“Year after year, the Bay Area demonstrates itself as a driving force for cutting-edge innovation,” Carina Ruiz Singh, Deloitte’s Silicon Valley managing partner, said in a statement. “The 46 companies from Silicon Valley — spanning the software, AI and semiconductor sectors ... are forging new paths in technology, and fueling significant growth, helping to strengthen our region’s reputation as a leading hub for breakthrough ideas and innovation.”
Below are more details on the top five Bay Area tech companies included in this year’s Deloitte ranking. Make sure to check out the full list as well.
Top San Francisco Tech Companies on Deloitte’s 2024 Technology Fast 500
- Horizon3.ai
- Parafin
- Elisity
- Rad AI
- Observe, Inc.
Ranked #3, 19,939% Growth
Horizon3.ai is a network security company based in San Francisco that helps organizations fortify their exploitable attack surface through autonomous pentesting. Its NodeZero platform automatically finds weaknesses in a company’s network, determines how to fix them and immediately verifies that those fixes work. The company leverages an attacker’s perspective to help enterprises prioritize their defensive efforts.
Ranked #10, 9,594% Growth
Parafin is a San Francisco fintech company offering white-labeled, AI-powered financing to help businesses invest in their own growth. Its embedded financial solutions provide organizations with flexible access to working capital, enable them to offer spend management solutions to their business customers and allow them to split payments into installments.
Ranked #13, 8,860% Growth
San Jose-based Elisity provides network security solutions focused on microsegmentation, helping businesses quickly gain visibility into all their managed and unmanaged network assets and secure their digital environments against malicious network traffic. It serves enterprise customers in the healthcare, manufacturing, biotech, pharma and commercial sectors.
Ranked #36, 3,224% Growth
Rad AI has ranked within the top five fast-growing Bay Area companies again this year. The company is headquartered in San Francisco and provides AI-powered software to help radiologists save time, reduce burnout and improve patient care. Rad AI’s solutions cover reporting, impressions and continuity to streamline radiology workflows and follow-up care.
Ranked #38, 2,973% Growth
Observe, Inc. is a San Mateo-based observability platform leveraging artificial intelligence to help enterprises detect anomalies, troubleshoot applications and resolve incidents. Its platform consolidates logs, application performance monitoring and infrastructure monitoring and allows companies to retain all their telemetry in a streaming data lake.
