# AI companies headquartered in Sunnyvale

Tamtam tracks 31 AI companies headquartered in Sunnyvale. This list ranks the 30 largest by number of employees on LinkedIn, led by Synopsys Inc, LinkedIn and Fortinet. Their median headcount is 613. Half of them were founded in 2011 or later.

This selection of large and mid-sized companies in Sunnyvale focuses on artificial intelligence, with a strong emphasis on software development and cybersecurity. Companies like Synopsys Inc provide silicon and systems design solutions, while LinkedIn connects professionals globally. Fortinet specializes in protecting digital environments, and Xoriant offers digital engineering services. Applied Intuition accelerates safe and intelligent machines, and Cerebras focuses on deep learning technology.

Several companies on this list were founded in the 2010s, indicating a recent growth in AI-focused enterprises in Sunnyvale. For example, Applied Intuition was founded in 2017, Cerebras in 2015, and Illumio in 2013. These younger firms often operate alongside more established entities such as Fortinet, founded in 2000, and Xoriant, founded in 1990.

🇺🇸 Sunnyvale · 30 companies · Updated Nov 12, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [Synopsys Inc](https://www.tamtam.ai/c/synopsys-inc) (synopsys.com)<br>It provides comprehensive silicon and systems design solutions, partnering with customers to enhance R&D capabilities and drive innovation across industries. | Software Development | 🇺🇸 Sunnyvale | 27,809 |  |
| 2 | [LinkedIn](https://www.tamtam.ai/c/linkedin) (careers.linkedin.com)<br>It connects professionals globally, offering services like Talent Solutions, Marketing Solutions, Sales Solutions, and Premium Subscriptions for productivity and success. | Software Development | 🇺🇸 Sunnyvale | 23,635 |  |
| 3 | [Fortinet](https://www.tamtam.ai/c/fortinet) (fortinet.com)<br>Fortinet enables trust in the digital world by protecting people, devices, and data for enterprises, service providers, and government organizations | Computer and Network Security | 🇺🇸 Sunnyvale | 16,304 | 2000 |
| 4 | [Xoriant](https://www.tamtam.ai/c/xoriant) (xoriant.com)<br>Xoriant is a global digital engineering firm that turns imaginative visions into realities, accelerating business outcomes with innovative technology solutions | IT Services and IT Consulting | 🇺🇸 Sunnyvale | 5,220 | 1990 |
| 5 | [Proofpoint](https://www.tamtam.ai/c/proofpoint) (proofpoint.com)<br>A company specializing in cybersecurity and compliance solutions, protecting people across email, web, cloud, and social media channels effectively | Computer and Network Security | 🇺🇸 Sunnyvale | 5,200 |  |
| 6 | [Applied Intuition](https://www.tamtam.ai/c/applied-intuition) (appliedintuition.com)<br>Vehicle software supplier accelerating safe and intelligent machines globally through simulation and validation platforms for automotive, trucking, and construction industries Headquarters in CA | Software Development | 🇺🇸 Sunnyvale | 1,593 | 2017 |
| 7 | [RUCKUS Networks](https://www.tamtam.ai/c/ruckus-networks) (ruckusnetworks.com)<br>The company builds purpose-driven networks for industries with high-performance wireless and wired solutions, IoT, assurance, security, and AI-driven software for exceptional connection experiences | Computer Networking Products | 🇺🇸 Sunnyvale | 1,388 | 2004 |
| 8 | [Cerebras](https://www.tamtam.ai/c/cerebras) (cerebras.ai)<br>Accelerating deep learning through cutting-edge technology, including the fastest AI computer with a revolutionary chip for faster neural network training Join our team! | Semiconductor Manufacturing | 🇺🇸 Sunnyvale | 930 | 2015 |
| 9 | [Illumio](https://www.tamtam.ai/c/illumio-sunnyvale) (illumio.com)<br>Leading ransomware, breach containment; redefining cyberattack containment, operational resilience; AI security graph identifies, contains threats across hybrid multi-cloud environments; stopping attack spread. | Computer and Network Security | 🇺🇸 Sunnyvale | 916 | 2013 |
| 10 | [eGain Corporation](https://www.tamtam.ai/c/egain-corporation) (egain.com)<br>AI-powered knowledge management platform enhancing customer experience and reducing service costs for Fortune 500 clients and government agencies. | Software Development | 🇺🇸 Sunnyvale | 782 | 1997 |
| 11 | [Cresta](https://www.tamtam.ai/c/cresta) (cresta.com)<br>It enhances contact center performance using generative AI for real-time insights, coaching, and tracking agent interactions to improve efficiency. | Software Development | 🇺🇸 Sunnyvale | 727 | 2017 |
| 12 | [Evergent Technologies Inc.](https://www.tamtam.ai/c/evergent-technologies-inc) (evergent.com)<br>A leading provider of subscription and partner management solutions, offering enterprise-grade software for subscription management, monetization, royalties, customer retention, and brand loyalty | Software Development | 🇺🇸 Sunnyvale | 663 | 2008 |
| 13 | [Ooma, Inc.](https://www.tamtam.ai/c/ooma-inc) (ooma.com)<br>The company creates innovative communications solutions for businesses and consumers, offering cloud-based telephony, home security, HD voice quality, mobile integration, and smart connected devices | Telecommunications | 🇺🇸 Sunnyvale | 652 | 2003 |
| 14 | [Clari](https://www.tamtam.ai/c/clari) (clari.com)<br>It provides revenue teams with insights to enhance efficiency, predictability, and growth, improving visibility and accuracy in revenue processes. | Software Development | 🇺🇸 Sunnyvale | 618 | 2012 |
| 15 | [Jumio Corporation](https://www.tamtam.ai/c/jumio-corporation) (jumio.com)<br>Provides AI-powered identity intelligence, anchored in biometric authentication and automation, to establish and maintain trust for organizations and fight fraud. | Software Development | 🇺🇸 Sunnyvale | 613 | 2010 |
| 16 | [Matterport](https://www.tamtam.ai/c/matterport) (matterport.com)<br>Revolutionizing the built world through spatial computing technology, turning buildings into data for improved planning, construction, operations, and marketing worldwide | Software Development | 🇺🇸 Sunnyvale | 531 | 2011 |
| 17 | [Indium Software - Independent Software Testing Company](https://www.tamtam.ai/c/indium-software-independent-software-testing-company) (indiumsoft.com)<br>Global Independent Software Testing Services Company with a focus on multiple domains, offering on-demand QA services, specialized testing, and innovative frameworks for accelerated testing | IT Services and IT Consulting | 🇺🇸 Sunnyvale | 523 | 1999 |
| 18 | [HackerEarth](https://www.tamtam.ai/c/hackerearth) (hackerearth.com)<br>Developer assessment software helping companies accurately measure developer skills, improve engineering hires, reduce recruiter screening time, and engage developers in hackathons and coding challenges | Software Development | 🇺🇸 Sunnyvale | 512 | 2012 |
| 19 | [TiDB, powered by PingCAP](https://www.tamtam.ai/c/tidb-powered-by-pingcap) (pingcap.com)<br>Leading open-source distributed SQL database, powers modern applications with elasticity, versatility, reliability for world-renowned organizations. | Software Development | 🇺🇸 Sunnyvale | 508 | 2015 |
| 20 | [Yugabyte](https://www.tamtam.ai/c/yugabyte) (yugabyte.com)<br>Innovative company behind YugabyteDB, a distributed database for cloud native applications, offering high performance, global data distribution, and seamless Kubernetes deployment | Software Development | 🇺🇸 Sunnyvale | 486 | 2016 |
| 21 | [Ceribell │ AI-Powered Point-of-Care EEG](https://www.tamtam.ai/c/ceribell-ai-powered-point-of-care-eeg) (ceribell.com)<br>A revolutionary AI-powered EEG system improving seizure management in acute care by providing rapid, accurate diagnostic information and continuous monitoring | Medical Equipment Manufacturing | 🇺🇸 Sunnyvale | 408 | 2014 |
| 22 | [Fission Labs](https://www.tamtam.ai/c/fission-labs) (fissionlabs.com)<br>Software development company offering end-to-end technology solutions including product development, cloud engineering, big data analytics, DevOps consulting, and AI/ML solutions | Software Development | 🇺🇸 Sunnyvale | 407 | 2008 |
| 23 | [HCL Unica](https://www.tamtam.ai/c/hcl-unica) (hcl-software.com)<br>Marketing software for digital transformation, empowering organizations with enterprise marketing solutions for valuable customer relationships and measurable business outcomes | Software Development | 🇺🇸 Sunnyvale | 360 | 1992 |
| 24 | [Emumba](https://www.tamtam.ai/c/emumba) (emumba.com)<br>Emumba is a software services company based in Islamabad, specializing in frontend, backend, QA, and DevOps for world-class clients worldwide | Software Development | 🇺🇸 Sunnyvale | 330 | 2011 |
| 25 | [Lyric](https://www.tamtam.ai/c/lyric-sunnyvale) (lyric.tech)<br>Empower supply chain teams with data, advanced science, configurable workflows, and apps to create smarter, sustainable supply chain solutions. | Software Development | 🇺🇸 Sunnyvale | 307 | 2021 |
| 26 | [KloudGin](https://www.tamtam.ai/c/kloudgin) (kloudgin.com)<br>A mobile-first, cloud-based solution for field service and asset management, automating work processes, boosting worker productivity, and enabling new revenue streams | Software Development | 🇺🇸 Sunnyvale | 239 | 2014 |
| 27 | [SutiSoft, Inc.](https://www.tamtam.ai/c/sutisoft-inc) (sutisoft.com)<br>A leading provider of integrated business management solutions, offering both on-premise and on-demand solutions with a focus on customization and ease of integration | Software Development | 🇺🇸 Sunnyvale | 195 | 2009 |
| 28 | [Caspio](https://www.tamtam.ai/c/caspio) (caspio.com)<br>An all-in-one low-code platform for creating data-driven apps, enabling users to streamline operations, automate workflows, and improve customer experience globally | Software Development | 🇺🇸 Sunnyvale | 193 | 2000 |
| 29 | [Rubedo Life Sciences](https://www.tamtam.ai/c/rubedo-life-sciences) (rubedolife.com)<br>A biopharmaceutical company in Sunnyvale, CA, developing therapies targeting senescent cells involved in chronic age-related diseases using a proprietary drug discovery platform | Biotechnology Research | 🇺🇸 Sunnyvale | 34 | 2018 |
| 30 | [Nexxa.ai](https://www.tamtam.ai/c/nexxa-ai) (nexxa.ai)<br>Develops AI agents that assist industrial engineers in heavy project industries by automating repetitive tasks and enhancing productivity. | Software Development | 🇺🇸 Sunnyvale | 30 | 2024 |

## How this list is built

Every company on this list has a Tamtam company profile. The industry is the one the company gives on LinkedIn; categories such as SaaS or fintech are classified by Tamtam's AI from the company's website and LinkedIn page; and the headquarters city must match the company's own address. Companies are ranked by the number of employees on LinkedIn, and the list is refreshed every night. Classifications can be wrong, so treat the list as a starting point rather than an official ranking. Last updated Nov 12, 2026.

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Source: https://www.tamtam.ai/l/ai-companies-sunnyvale