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Top 46 Research Services companies in California

Tamtam tracks 46 Research Services companies headquartered in California. This list ranks all of them by number of employees on LinkedIn, led by Lawrence Livermore National Laboratory, OpenAI and Berkeley Lab. Their median headcount is 344. Half of them were founded in 1993 or later. The most common headquarters are San Francisco (7), San Diego (5) and La Jolla (4).

馃嚭馃嚫 California46 companiesUpdated Oct 24, 2026
#CompanyIndustryHeadquarters EmployeesFounded
1
Lawrence Livermore National Laboratoryllnl.gov

Development and application of advanced science, technology, and engineering to enhance national security, counterterrorism, defense, energy, and environmental challenges.

Research Services 馃嚭馃嚫 Livermore 9,546 1952
2
OpenAIopenai.com

An AI research and deployment company focused on creating safe and beneficial general-purpose artificial intelligence for the benefit of humanity

Research Services 馃嚭馃嚫 San Francisco 9,268 2015
3
Berkeley Lablinktr.ee

A national laboratory managed by the University of California for the Department of Energy, focusing on sustainable energy, materials innovation, computing, and scientific exploration

Research Services 馃嚭馃嚫 Berkeley 5,253 1931
4
X, The Moonshot Factoryx.company

A moonshot factory inventing and launching breakthrough technologies to create a radically better world

Research Services 馃嚭馃嚫 Mountain View 3,149 n/a
5
SRIsri.com

An independent non-profit institute focused on research and development in Silicon Valley, creating innovative technologies for a better future globally

Research Services 馃嚭馃嚫 Menlo Park 2,968 1946
6
Scripps Researchscripps.edu

A leader in biomedical research, innovation, and education, working to improve human health and create hope for millions worldwide

Research Services 馃嚭馃嚫 La Jolla 2,348 1993
7
SLAC National Accelerator Laboratorywww6.slac.stanford.edu

A diverse workforce of 1,700 employees at the forefront of cutting-edge research in various disciplines, collaborating in a stimulating environment

Research Services 馃嚭馃嚫 Menlo Park 2,235 1962
8
Scripps Institution of Oceanographyscripps.ucsd.edu

A world-renowned institution focusing on ocean and earth science research, education, and public service across various disciplines

Research Services 馃嚭馃嚫 La Jolla 1,484 1903
9
IEEE Computer Societycomputer.org

Facilitating professional development and collaboration in computer science and engineering through conferences, publications, training, and resources for industry advancement

Research Services 馃嚭馃嚫 Los Alamitos 1,443 1946
10
Samsung Strategy and Innovation Center

A technology innovation center fostering disruptive technologies, investing in startups, and expanding business lines through partnerships and acquisitions

Research Services 馃嚭馃嚫 Menlo Park 1,283 2013
11
Salk Institute for Biological Studiessalk.edu

World-class scientists conducting advanced research in neuroscience, cancer, aging, immunobiology, plant biology, and computational biology fields.

Research Services 馃嚭馃嚫 La Jolla 1,249 1960
12
WestEdwested.org

A national nonprofit agency promoting equity and excellence in education through research, development, and services, offering professional growth and benefits

Research Services 馃嚭馃嚫 San Francisco 1,237 1966
13
AI at Metaai.meta.com

Advancing AI through open science and collaboration, focusing on infrastructure, NLP, generative AI, vision, and human-computer interaction.

Research Services 馃嚭馃嚫 Menlo Park 1,101 n/a
14
PARCsri.com

Innovative research institute in Silicon Valley with deep impact on technology, now leading open innovation and developing groundbreaking technologies and ideas

Research Services 馃嚭馃嚫 Palo Alto 962 n/a
15
HRL Laboratories, LLChrl.com

Leading research laboratory focused on groundbreaking technology solutions in circuitry, computing, materials, and data extraction for diverse applications in aerospace, automotive, and consumer products

Research Services 馃嚭馃嚫 Malibu 860 1997
16
Eurofins | EAG Laboratorieseag.com

A scientific services company specializing in advanced materials and integrated circuitry analysis, offering problem-solving expertise to accelerate innovation and ensure quality and compliance

Research Services 馃嚭馃嚫 San Diego 818 1978
17
Gladstone Institutesgladstone.org

The company drives discovery in disease-oriented science, mentors future leaders, and explores innovative approaches to overcome health challenges through convergence

Research Services 馃嚭馃嚫 San Francisco 596 1979
18
R&Drad.inc

A company dedicated to supporting and celebrating artists, created by artists themselves

Research Services 馃嚭馃嚫 Los Angeles 591 n/a
19
The Lundquist Institutelundquist.org

Conducts groundbreaking medical research, collaborating with Harbor-UCLA Medical Center to translate discoveries into treatments benefiting individuals across various health conditions

Research Services 馃嚭馃嚫 Torrance 586 1952
20
Toyota Research Institutetri.global

The company focuses on advancing AI, automated driving, robotics, and materials science to create safer vehicles and improve mobility for all

Research Services 馃嚭馃嚫 Los Altos 474 2016
21
La Jolla Institute for Immunologylji.org

A non-profit medical research institute dedicated to studying the immune system, discovering causes of disorders, and finding treatments for human diseases

Research Services 馃嚭馃嚫 La Jolla 423 1988
22
Berkeley Artificial Intelligence Researchbair.berkeley.edu

A research lab at UC Berkeley focused on artificial intelligence, machine learning, computer vision, robotics, and interdisciplinary collaborations

Research Services 馃嚭馃嚫 Berkeley 421 n/a
23
SETI Instituteseti.org

A Silicon Valley-based nonprofit research organization studying life and intelligence in the universe, promoting diversity, equity, and inclusion

Research Services 馃嚭馃嚫 Mountain View 344 1984
24
BLOCK Development

A research and development facility within a group of companies, established in 2004 and now operating as a subsidiary

Research Services 馃嚭馃嚫 Los Angeles 318 2014
25
USC Information Sciences Instituteisi.edu

A leading research institute specializing in advanced information processing, computer, and communication technologies, affiliated with the University of Southern California

Research Services 馃嚭馃嚫 Marina Del Rey 284 1972
26
TSIAbit.ly

Subscription-based research and advisory company providing AI-driven insights, trends, benchmarking, and expert support to industry leaders worldwide.

Research Services 馃嚭馃嚫 San Diego 236 2009
27
Honda Research Institute USA, Inc.usa.honda-ri.com

An innovative research institute focused on creating technologies and solutions to benefit society through real-world applications

Research Services 馃嚭馃嚫 San Jose 234 2003
28
Nounnoun.com

A company in Alpha stage, offering a product or service Join the waitlist to experience it before its public release

Research Services 馃嚭馃嚫 Irvine 222 2022
29
Brain Exercise Initiativebrainexerciseinitiative.com

Student-run nonprofit helping seniors with dementia remember and thrive through specialized programs and services

Research Services 馃嚭馃嚫 San Diego 193 2019
30
Google AIai.google

A research-focused company advancing AI in various domains, creating tools to ensure universal access, and emphasizing socially beneficial, fair AI technology

Research Services 馃嚭馃嚫 Mountain View 190 2010
31
Scientific Applications & Research Associates (SARA), Inc.sara.com

Innovative team specializing in wave energy technology, electromagnetism, acoustics, electronics, and processing for defense, renewable energy, robotics, and testing challenges

Research Services 馃嚭馃嚫 Cypress 187 1989
32
Midjourneymidjourney.com

An independent research lab pushing boundaries in thought and creativity to enhance human imagination and explore new mediums

Research Services 馃嚭馃嚫 San Francisco 184 n/a
33
ProSciento, Inc.prosciento.com

Specializing in metabolic diseases research, we offer customized services for multinational clinical trials to advance drug and device development Visit wwwproscientocom for more information

Research Services 馃嚭馃嚫 San Diego 180 2003
34
Children's Oncology Groupchildrensoncologygroup.org

World's largest childhood and adolescent cancer research organization, conducting clinical trials to improve treatments and increase survival rates for children with cancer

Research Services 馃嚭馃嚫 Arcadia 174 1955
35
Hawthorne Health, Inc.hawthornehealth.com

Revolutionizing clinical trials by bringing them directly to patients through a network of healthcare professionals, improving data quality and patient experience

Research Services 馃嚭馃嚫 Walnut Creek 173 2015
36
RISArisalabs.ai

The company specializes in creating AI agents to streamline complex workflows in the healthcare industry

Research Services 馃嚭馃嚫 Palo Alto 172 2024
37
NCIRE - The Northern California Institute for Research and Education, Inc.ncire.org

Leading nonprofit research institute dedicated to advancing Veterans health research, pioneering new treatments and setting a new standard of care

Research Services 馃嚭馃嚫 San Francisco 166 1988
38
Rancho BioSciencesranchobiosciences.com

International data curation and analysis services for Pharma, Government, and Biotech, with a team of experienced scientists aiming to find cures for diseases

Research Services 馃嚭馃嚫 San Diego 165 2012
39
Point Blue Conservation Sciencepointblue.org

A non-profit organization dedicated to conserving birds, wildlife, and ecosystems through scientific research, restoration, outreach, and partnerships Headquarters in Petaluma, California

Research Services 馃嚭馃嚫 Petaluma 165 1965
40
Redrobin.redrob.io

Reorganizing global people data to support sales, recruitment, and networking, backed by top VCs and certified as a great workplace.

Research Services 馃嚭馃嚫 San Francisco 164 2018
41
W.M Keck Science Departmentkecksci.claremont.edu

The WM Keck Science Department offers an integrated science curriculum across three colleges, emphasizing interdisciplinary study and research through collaboration

Research Services 馃嚭馃嚫 Claremont 148 1964
42
Joint Genome Institutejgi.doe.gov

A DOE user facility at Lawrence Berkeley Lab providing advanced genome science capabilities for research in energy and environmental challenges

Research Services 馃嚭馃嚫 Berkeley 146 1997
43
Sarafan ChEM-H | Stanford Universitychemh.stanford.edu

Innovative hub focused on improving human health through diverse disciplines and people in life, physical, and clinical sciences

Research Services 馃嚭馃嚫 Stanford 51 2014
44
YTC America Inc. (YTCA)ytca.com

This company is a North American research center focusing on advanced materials, energy technologies, and next-generation vehicle-related information communication technology for global operations

Research Services 馃嚭馃嚫 Camarillo 31 1992
45
Insight Softmax Consultinginsightsoftmax.com

A company specializing in Data Analytics, AI, and Machine Learning to solve business problems for clients such as Autodesk, BMW, and others

Research Services 馃嚭馃嚫 San Francisco 20 2016
46
DLYog Lab Research Services LLCdlyog.com

The company specializes in developing ethically responsible AI applications for enterprises through automation, cloud, and data center solutions

Research Services 馃嚭馃嚫 Sacramento 2 2024

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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 Oct 24, 2026.

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