# The 50 largest Education companies in California

Tamtam tracks 56 Education companies headquartered in California. This list ranks the 50 largest by number of employees on LinkedIn, led by Kern High School District, RIVERSIDE UNIFIED SCHOOL DISTRICT and Fremont Unified School District. Their median headcount is 426. Half of them were founded in 2004 or later. The most common headquarters are San Francisco (8), Los Angeles (6) and Berkeley (2).

These California education companies are predominantly large public school districts, alongside a few private education providers. Examples include Kern High School District, a large high school district in Kern County; Riverside Unified School District, which provides services to its community; Fremont Unified School District, serving over 32,000 students; and Grade Potential Tutoring, offering in-home tutoring services.

The data shows a strong concentration of K-12 public education institutions across various Californian cities. While many are established entities like Union School District, founded in 1863, there are also newer players such as Product Marketing Alliance, established in 2019, which focuses on community and skill development for product marketers.

🇺🇸 California · 50 companies · Updated Nov 13, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [Kern High School District](https://www.tamtam.ai/c/kern-high-school-district) (kernhigh.org)<br>Large high school district in Kern County, California with 19 comprehensive high schools, adult education, career technical education facilities, and special education sites | Education | 🇺🇸 Bakersfield | 3,323 |  |
| 2 | [RIVERSIDE UNIFIED SCHOOL DISTRICT](https://www.tamtam.ai/c/riverside-unified-school-district) (riversideunified.org)<br>A medical practice company located in Riverside, California, providing services to the community within the Riverside Unified School District | Education | 🇺🇸 Riverside | 2,338 | 1898 |
| 3 | [Fremont Unified School District](https://www.tamtam.ai/c/fremont-unified-school-district) (fremontunified.org)<br>A high-performing school district in Fremont, CA, serving over 32,000 students with vibrant libraries, programs, and athletics to educate, challenge, and inspire | Education | 🇺🇸 Fremont | 1,905 | 1964 |
| 4 | [Grade Potential Tutoring](https://www.tamtam.ai/c/grade-potential-tutoring) (gradepotentialtutors.com)<br>Provider of top-notch in-home tutoring services for all subjects and ages, including college classes Established in 2002 in San Luis Obispo, CA, with offices across Western & Central US | Education | 🇺🇸 San Luis Obispo | 1,717 | 2002 |
| 5 | [Product Marketing Alliance](https://www.tamtam.ai/c/product-marketing-alliance) (productmarketingalliance.com)<br>Community connecting product marketers worldwide, offering networking, career growth, skill development, industry insights, and collaborative learning opportunities. | Education | 🇺🇸 San Francisco | 1,468 | 2019 |
| 6 | [TUSTIN UNIFIED SCHOOL DISTRICT](https://www.tamtam.ai/c/tustin-unified-school-district) (tustin.k12.ca.us)<br>An education management company based in Tustin, California, overseeing school district operations and educational programs for students | Education | 🇺🇸 Tustin | 1,275 | 1972 |
| 7 | [William S. Hart Union High School District](https://www.tamtam.ai/c/william-s-hart-union-high-school-district) (hartdistrict.org)<br>A school district in northern Los Angeles County, serving approximately 21,000 students in grades seven through twelve in the Santa Clarita Valley | Education | 🇺🇸 Santa Clarita | 1,249 | 1945 |
| 8 | [Anaheim Union High School Dst](https://www.tamtam.ai/c/anaheim-union-high-school-dst) (auhsd.us)<br>A large school district in California offering high-quality education to a diverse student population, focusing on academic achievement, 21st-century skills, and college/career readiness | Education | 🇺🇸 Anaheim | 1,125 | 1898 |
| 9 | [Art of Problem Solving](https://www.tamtam.ai/c/art-of-problem-solving) (artofproblemsolving.com)<br>Developing educational opportunities for top students worldwide in math and expanding into other subjects, with a focus on online learning | Education | 🇺🇸 San Diego | 967 | 2003 |
| 10 | [Monterey Peninsula Unified School District](https://www.tamtam.ai/c/monterey-peninsula-unified-school-district) (mpusd.net)<br>A public school district on the Monterey Peninsula dedicated to providing quality education, engaging students, and preparing them for college and careers | Education | 🇺🇸 Monterey | 896 |  |
| 11 | [CHAFFEY JOINT UNION HIGH SCHOOL DISTRICT](https://www.tamtam.ai/c/chaffey-joint-union-high-school-district) (cjuhsd.net)<br>A high school district serving multiple communities in California, with approximately 24,000 students, making it the second largest in the state | Education | 🇺🇸 Ontario | 855 | 1911 |
| 12 | [Trading Academy](https://www.tamtam.ai/c/trading-academy) (tradingacademy.com)<br>A global leader in financial education based in Irvine, California, offering professional training in trading and investing across various asset classes | Education | 🇺🇸 Irvine | 847 | 1997 |
| 13 | [PUSD Foundation](https://www.tamtam.ai/c/pusd-foundation) (pusdfoundation.com)<br>Providing funding, resources, and support for educational programs and activities to enhance the student experience in the District | Education | 🇺🇸 San Diego | 818 | 2003 |
| 14 | [Coachella Valley Unified School District](https://www.tamtam.ai/c/coachella-valley-unified-school-district) (cvusd.us)<br>A public school district in Riverside County, CA serving various cities and communities with education services and headquarters in Thermal | Education | 🇺🇸 Thermal | 795 |  |
| 15 | [Union School District](https://www.tamtam.ai/c/union-school-district) (unionsd.org)<br>Dedicated to enriching the community through learning, providing vital skills for children to pursue lifelong learning and become productive citizens | Education | 🇺🇸 San Jose | 694 | 1863 |
| 16 | [Hacienda La Puente Unified School District](https://www.tamtam.ai/c/hacienda-la-puente-unified-school-district) (hlpschools.org)<br>A diverse school district offering innovative programs from Transitional Kindergarten to Adult Education, including language immersion and career development opportunities | Education | 🇺🇸 Industry | 605 | 1970 |
| 17 | [HeyTutor](https://www.tamtam.ai/c/heytutor) (heytutor.com)<br>A top provider of personalized in-person and online tutoring services for school districts nationwide, specializing in customized support for student learning needs | Education | 🇺🇸 Los Angeles | 602 | 2014 |
| 18 | [Customer Success Collective](https://www.tamtam.ai/c/customer-success-collective) (customersuccesscollective.com)<br>A global community for customer success professionals to network, learn, and grow, striving to elevate industry standards and recognition | Education | 🇺🇸 San Francisco | 556 | 2021 |
| 19 | [South San Francisco Unified School District](https://www.tamtam.ai/c/south-san-francisco-unified-school-district) (ssfusd.org)<br>They are a leader in the green schools movement, providing diverse learning experiences for over 8,000 students with STEM and ethnic studies programs | Education | 🇺🇸 South San Francisco | 529 | 1913 |
| 20 | [Beaumont Unified School District](https://www.tamtam.ai/c/beaumont-unified-school-district) (beaumontusd.us)<br>Education provider in Beaumont, California offering TK-12 schooling and adult education programs Serving a diverse student population with comprehensive educational opportunities | Education | 🇺🇸 Beaumont | 521 | 2004 |
| 21 | [Abroad.io](https://www.tamtam.ai/c/abroad-io) (abroad.io)<br>Transformational leadership development programs fostering wise, purposeful leaders to navigate challenges and shape the future in an interconnected world | Education | 🇺🇸 San Francisco | 482 | 2018 |
| 22 | [Sales Enablement Collective](https://www.tamtam.ai/c/sales-enablement-collective) (salesenablementcollective.com)<br>Global community connecting sales enablement professionals for networking, skill development, industry insights, and collaborative learning to drive growth. | Education | 🇺🇸 San Francisco | 463 | 2019 |
| 23 | [HBUHSD](https://www.tamtam.ai/c/hbuhsd) (hbuhsd.edu)<br>An education management company located in Huntington Beach, CA, focused on providing educational services and resources to students | Education | 🇺🇸 Huntington Beach | 451 |  |
| 24 | [Engineering Infinity](https://www.tamtam.ai/c/engineering-infinity) (youtube.com)<br>The company aims to improve the world by facilitating global learning opportunities for individuals | Education | 🇺🇸 San Francisco | 443 | 2018 |
| 25 | [Tutor Me Education](https://www.tamtam.ai/c/tutor-me-education) (tutormeeducation.com)<br>A tech company revolutionizing education in the US with high dosage tutoring, equitable services, and curriculum development through specialized Academic/Test Preparation programs | Education | 🇺🇸 Los Angeles | 426 | 2011 |
| 26 | [JHT Real Estate School 부동산학교](https://www.tamtam.ai/c/jht-real-estate-school)<br>A rapidly-growing global residential real estate company located in Fullerton, offering services through the Real Estate Cloud Brokerage model | Education | 🇺🇸 Fullerton | 406 | 2020 |
| 27 | [Mentor Match](https://www.tamtam.ai/c/mentor-match) (mentormatch.com)<br>An online tuition platform offering 1-on-1 Math & Science classes for students in Classes 6-12, ensuring better understanding, improved marks, and expert guidance | Education | 🇺🇸 San Francisco | 395 | 2020 |
| 28 | [Mater Dei High School](https://www.tamtam.ai/c/mater-dei-high-school) (materdei.org)<br>A Catholic high school providing a holistic education, empowering students to become compassionate leaders committed to knowledge, faith, and service | Education | 🇺🇸 Santa Ana | 383 | 1950 |
| 29 | [Hollister School District](https://www.tamtam.ai/c/hollister-school-district) (hesd.org)<br>This company is a school district that provides educational services to students in their community | Education | 🇺🇸 Hollister | 360 | 1872 |
| 30 | [Laguna Beach Unified School District](https://www.tamtam.ai/c/laguna-beach-unified-school-district) (lbusd.org)<br>An outstanding school district in Orange County with a focus on student learning, strong leadership, community support, and high achievement Launching students into successful futures | Education | 🇺🇸 Laguna Beach | 335 | 1934 |
| 31 | [CMO Alliance](https://www.tamtam.ai/c/cmo-alliance) (cmoalliance.com)<br>Global community for Chief Marketing Officers in B2B space to network, learn, and grow, providing support and connections for success | Education | 🇺🇸 San Francisco | 328 | 2021 |
| 32 | [Newark Unified School District](https://www.tamtam.ai/c/newark-unified-school-district) (newarkunified.org)<br>Education management company providing services in Newark, CA | Education | 🇺🇸 Newark | 325 |  |
| 33 | [Lawrence Hall of Science, UC Berkeley](https://www.tamtam.ai/c/lawrence-hall-of-science-uc-berkeley) (lawrencehallofscience.org)<br>Innovating in science education for over 50 years to make STEM accessible through experiential learning and empowering educators for a brighter future | Education | 🇺🇸 Berkeley | 272 | 1968 |
| 34 | [Sketchy](https://www.tamtam.ai/c/sketchy) (sketchy.com)<br>Revolutionary visual learning platform using art, science, and technology to help students learn and recall information, leading to higher test scores | Education | 🇺🇸 Los Angeles | 199 | 2013 |
| 35 | [Larchmont Charter School](https://www.tamtam.ai/c/larchmont-charter-school) (larchmontcharter.org)<br>A parent-initiated school providing diverse students with an exceptional public education in a creative, inquiry-based, and community-driven environment | Education | 🇺🇸 Los Angeles | 187 | 2004 |
| 36 | [HelloTalk](https://www.tamtam.ai/c/hellotalk) (hellotalk.com)<br>Global language and cultural exchange platform with 40 million members in 200 countries for free language teaching and learning Promotes empathy and cultural understanding | Education | 🇺🇸 Los Angeles | 185 | 2012 |
| 37 | [Digital NEST](https://www.tamtam.ai/c/digital-nest-watsonville) (digitalnest.org)<br>The Digital NEST empowers youth through skill-building and technology training, preparing them to become successful professionals and technology leaders | Education | 🇺🇸 Watsonville | 180 | 2014 |
| 38 | [Marymount California University](https://www.tamtam.ai/c/marymount-california-university) (marymountcalifornia.education)<br>A former private university offering associate, bachelor's, and graduate degrees, originally founded by the Religious of the Sacred Heart of Mary | Education | 🇺🇸 Palos Verdes | 177 | 1932 |
| 39 | [Benetech](https://www.tamtam.ai/c/benetech) (benetech.org)<br>This company provides technology and services to make education more inclusive, providing accessible books to millions of learners worldwide | Education | 🇺🇸 Palo Alto | 177 | 2000 |
| 40 | [Dublin High School](https://www.tamtam.ai/c/dublin-high-school) (dublin.k12.ca.us)<br>A high school located in Dublin, California, providing education to students in grades 9-12 | Education | 🇺🇸 Dublin | 175 |  |
| 41 | [SkillSets Online](https://www.tamtam.ai/c/skillsets-online) (skillsetsonline.com)<br>Developing premium online IT courses/labs since 2005, specializing in VMware, Cisco, Microsoft, Oracle, and IT Security topics for global corporations and students | Education | 🇺🇸 San Ramon | 173 | 2005 |
| 42 | [Sage Hill School](https://www.tamtam.ai/c/sage-hill-school) (sagehillschool.org)<br>A private high school in Newport Coast, CA offering small classes, academic excellence, college counseling, and a mission to inspire lifelong learning | Education | 🇺🇸 Newport Coast | 172 | 2000 |
| 43 | [Blue Ridge Academy](https://www.tamtam.ai/c/blue-ridge-academy) (theblueridgeacademy.com)<br>Blue Ridge Academy is a public, independent study school in Kern County, California, providing K-12 education in a flexible environment | Education | 🇺🇸 Maricopa | 171 | 2016 |
| 44 | [SPAR Research](https://www.tamtam.ai/c/spar-research) (supervisedprogramforalignment.org)<br>SPAR offers students an opportunity to engage in AI safety research projects with global mentors, focusing on technical safety, engineering, and governance | Education | 🇺🇸 Berkeley | 169 | 2023 |
| 45 | [EdTheory](https://www.tamtam.ai/c/edtheory) (edtheory.com)<br>Provides top-notch therapy and behavioral mental health services to children with special needs and autism, serving over 300 school districts nationwide | Education | 🇺🇸 Pleasanton | 168 | 2018 |
| 46 | [Coding Mind Academy](https://www.tamtam.ai/c/coding-mind-academy) (codingmind.com)<br>An educational organization focusing on teaching K-12 students computer science and programming through hands-on project-based programs | Education | 🇺🇸 Irvine | 168 | 2016 |
| 47 | [Synthesis](https://www.tamtam.ai/c/synthesis) (synthesis.com)<br>Educational program designed to unlock and develop children's hidden abilities, created at the SpaceX lab school for ages 7 and above. | Education | 🇺🇸 Los Angeles | 165 | 2020 |
| 48 | [Center for the Collaborative Classroom](https://www.tamtam.ai/c/center-for-the-collaborative-classroom) (collaborativeclassroom.org)<br>A nonprofit organization dedicated to cultivating proficient readers, critical thinkers, and respectful citizens through evidence-based programs and professional learning for educators | Education | 🇺🇸 Alameda | 155 | 1975 |
| 49 | [CrunchLabs](https://www.tamtam.ai/c/crunchlabs) (crunchlabs.com)<br>YouTube channel by former NASA engineer Mark Rober offering STEM toy subscription box for kids, encouraging curiosity and exploration | Education | 🇺🇸 Sunnyvale | 153 | 2022 |
| 50 | [Breathe For Change](https://www.tamtam.ai/c/breathe-for-change) (breatheforchange.com)<br>A movement promoting wellness in educators, students, and communities through mind-body wellness, social-emotional learning, yoga teacher trainings, and professional development for schools | Education | 🇺🇸 San Francisco | 151 | 2015 |

## 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 13, 2026.

## More company lists in California

- [The largest companies in California](https://www.tamtam.ai/l/largest-companies-california) (15,259)
- [Multinational companies in California](https://www.tamtam.ai/l/multinational-companies-california) (2,587)
- [SaaS companies in California](https://www.tamtam.ai/l/saas-companies-california) (1,854)
- [Software Development companies in California](https://www.tamtam.ai/l/software-development-companies-california) (1,649)
- [AI companies in California](https://www.tamtam.ai/l/ai-companies-california) (1,296)
- [Companies with in-house R&D in California](https://www.tamtam.ai/l/r-and-d-companies-california) (1,272)
- [Manufacturers in California](https://www.tamtam.ai/l/manufacturers-california) (1,065)
- [Hardware manufacturers in California](https://www.tamtam.ai/l/hardware-companies-california) (984)
- [IT Services and IT Consulting companies in California](https://www.tamtam.ai/l/it-services-and-it-consulting-companies-california) (968)
- [Education providers in California](https://www.tamtam.ai/l/education-companies-california-united-states) (950)
- [Subscription businesses in California](https://www.tamtam.ai/l/subscription-businesses-california) (939)
- [Venture capital and private equity firms in California](https://www.tamtam.ai/l/vc-and-private-equity-firms-california) (917)
- [Professional services firms in California](https://www.tamtam.ai/l/professional-services-firms-california) (880)
- [Companies with a mobile app in California](https://www.tamtam.ai/l/companies-with-mobile-app-california) (827)
- [Retail chains in California](https://www.tamtam.ai/l/retail-chains-california) (802)
- [IT services companies in California](https://www.tamtam.ai/l/it-services-companies-california) (796)
- [Venture Capital and Private Equity Principals companies in California](https://www.tamtam.ai/l/venture-capital-and-private-equity-principals-companies-california) (731)
- [Financial services firms in California](https://www.tamtam.ai/l/financial-services-firms-california) (711)
- [Financial Services companies in California](https://www.tamtam.ai/l/financial-services-companies-california) (642)
- [Healthcare providers in California](https://www.tamtam.ai/l/healthcare-providers-california) (569)
- [AI-native companies in California](https://www.tamtam.ai/l/ai-native-companies-california) (561)
- [Hospitals and Health Care companies in California](https://www.tamtam.ai/l/hospitals-and-health-care-companies-california) (555)
- [Consulting firms in California](https://www.tamtam.ai/l/consulting-firms-california) (551)
- [Public sector organisations in California](https://www.tamtam.ai/l/public-sector-organisations-california) (536)

## The same list elsewhere in United States

- [Education companies in the United States](https://www.tamtam.ai/l/education-companies-united-states) (251)
- [Education companies in New York State](https://www.tamtam.ai/l/education-companies-new-york-state-united-states) (30)

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Source: https://www.tamtam.ai/l/education-companies-california