Looking for a market research agency in California's Orange County to help you make informed decisions? DesignRush connects you with top firms trusted by brands like Honeywell and Estee Lauder. With over 1M monthly visitors and 40,000+ vetted agencies, you can trust our platform to guide you in finding the right partner. Compare providers by industry expertise, client type, budget, reviews, team size, and portfolio.
Best Orange County Market Research Firm Rankings
5 Companies - Rankings updated: March 31, 2026
Every agency featured on DesignRush is vetted for expertise and client satisfaction to support your decision-making. Some listings may be sponsored.
IT, Business, BPO, Audit, Tax and Advisory are just the beginning.
Grant Thornton LLP (US) is an IT, project management, audit, tax, AgTech, and BPO company headquartered in Chicago, Illinois with over 50 U.S. offices and access to a global network or member firms in over 135 countries. We offer a broad range of services in strategy and consulting, operations, technology and [... view Grant Thornton profile ]- Location
- Orange County, California
- Number of Employees
- 1000 & Up
- Average Hourly Rate
- $35/hr
- Minimal Budget
- $1,000 - $10,000
- Portfolios Count
- 2 Projects Listed
Data sourced from the agency's DesignRush profile, its website, and other relevant accountsGrant Thornton Services
Comprehensive analysis done by DesignRush Agency Experts.Clients and Projects
View Full Portfolio-thumb-webp.webp)
Financial Accounting Project Finance modernization for data-driven expansion -thumb-webp.webp)
Business Operations Consulting Project A new procurement paradigm at BDTX
Reviews verified by DesignRush and sourced from the agency's profileGrant Thornton Reviews & Testimonials
Theodore Mall's Review Sourced from Google
One of the world’s leading organizations of independent audit, tax and advisory firms. Grant Thornton has revenues in excess of $1.9 billion and operates more than 50 offices.
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Data sourced from the agency's DesignRush profileFinancial industry Real estate industry Media and Entertainment industry
Collaborating for Lasting Impact in Business Consulting
Join us at Deloitte, where we believe that our collective influence is the cornerstone of our value. With a rich legacy spanning over 175 years and a global network encompassing 150 countries, we empower remarkable achievements, solve complex problems, and drive meaningful progress for clients, professionals [... view Deloitte profile ]- Location
- Orange County, California
- Number of Employees
- 1000 & Up
- Portfolios Count
- 6 Projects Listed
Data sourced from the agency's DesignRush profile, its website, and other relevant accountsDeloitte Services
Comprehensive analysis done by DesignRush Agency Experts.Clients and Projects
View Full Portfolio-thumb-webp.webp)
Business Consulting Project How Deloitte helped a large fast food company become a leader in sustainability. -thumb-webp.webp)
Business Operations Consulting Project Not zero Modelled Reimagined Simplified Net zero -thumb-webp.webp)
Strategy Consulting Project Lagging Shifted Coached Moved Leading -thumb-webp.webp)
Business Consulting Project From Monitor to Protect
Reviews verified by DesignRush and sourced from the agency's profileDeloitte Reviews & Testimonials
InlineAdam's Review Sourced from Google
So sphiscated accounting systems I must say. For what? Never saw an irs payable in any return they asked me to prepare although I’m no licensed accountant. No names no whistle just a honest google review. Makes me wonder what an accountant does, cooking books or AICPA reporting them. No mark up in my basis. The roc building is beyond comprehension though, they even do SNL up or down stairs never got to see a show so I don’t know
Show moreModernfoldStyles, Inc.'s Review Sourced from Google
We are proud to have been able to offer a beautiful Modernfold panel recovery job to give the walls a facelift to complete newly renovated meeting rooms at Deloitte in Rockefeller Plaza. Deloitte has always been such a great and dear client of ours! We look forward to continuing to work together in the future!
Show moreAlex Stackhouse's Review Sourced from Google
Deloitte completely failed implementation of Army IgnitEd, which led to thousands of service members paying out of pocket for education expenses. The circus that we watched unfold leaves me with zero confidence in the services that this firm provides.
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Data sourced from the agency's DesignRush profileFinancial industry Government Sector IT industry Manufacturing industry Telecommunications industry
Building trust in society and solving important problems.
We’re a network of firms in 155 countries with over 284,000 people who are committed to delivering quality in BPO, project management, assurance, advisory, IT, and tax services. [... view PwC profile ]- Location
- Orange County, California
- Number of Employees
- 1000 & Up
Data sourced from the agency's DesignRush profile, its website, and other relevant accountsPwC Services
Reviews verified by DesignRush and sourced from the agency's profilePwC Reviews & Testimonials
Will Moss's Review Sourced from Google
How do you recognise an extrovert auditor? He looks at YOUR shoes whilst talking to you
Show moreStephen Carpenter's Review Sourced from Google
Very impressive entrance in Villiers Street. I walked in there and thought I it might have been a shopping centre, I was told it was not. I walked away .
Show morePaula Cumpik's Review Sourced from Google
Hard to figure out what's where and unfortunately I been to drop a Cv there . They say they don’t know where to send , and better to go in the web side and apply. This is very strange…..
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Data sourced from the agency's DesignRush profileFinancial industry Construction industry IT industry
Together, we achieve more.
Offering project management, business, and IT services. At KPMG LLP, their purpose is to turn knowledge into value for the benefit of their clients, people, and the capital markets. [... view KPMG profile ]- Location
- Orange County, California
- Number of Employees
- 1000 & Up
Data sourced from the agency's DesignRush profile, its website, and other relevant accountsKPMG Services
Reviews verified by DesignRush and sourced from the agency's profileKPMG Reviews & Testimonials
P. J.'s Review Sourced from Google
If you would like to see human beings organized as if they are an ant farm, this is the place.
Show moreKevin Meyer's Review Sourced from Google
Awesome old building on Park, also home to the NFL... Keep your eyes open in the lobby, and you'll undoubtedly run into a player.
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Data sourced from the agency's DesignRush profileFinancial Industry IT Industry Real estate Industry
Now, for tomorrow.
Offering AgTech, Business, and IT Services. Baker Tilly Canada Cooperative is a member of the global network of Baker Tilly International Limited, the members of which are separate and independent legal entities. Baker Tilly Canada refers to the association of member firms of Baker Tilly Canada Cooperative [... view Baker Tilly profile ]- Location
- Orange County, California
- Number of Employees
- 1000 & Up
Data sourced from the agency's DesignRush profile, its website, and other relevant accountsBaker Tilly Services
Reviews verified by DesignRush and sourced from the agency's profileBaker Tilly Reviews & Testimonials
Jay P's Review Sourced from Google
Excellent firm. Knowledgable and will help their clients in ways other firms can not even begin to. Great for professionals/business owners.
Show moreSewell Grain Farms's Review Sourced from Google
Catalyst played a key role in the smooth transition of our 4th generation family farm and continue to be a great support for our ongoing financial reporting needs.
Show moreJames Kernahan's Review Sourced from Google
Great firm, found me tax savings I didn't know existed and are very easy to work with. Highly recommend them.
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Data sourced from the agency's DesignRush profileAutomotive Industry Real Estate Industry Legal Industry
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About The Author and Expert Reviewer
Bojana Trajcheva is a seasoned content editor and innovation researcher with extensive experience in the tech and marketing industries. Formerly Editor-in-Chief at Studentsko Eho, she developed a strong foundation in content creation and editorial leadership. Bojana further honed her skills in senior innovation research roles and now brings this combined expertise to her work as an editor at DesignRush.
Lana Bečiragić is a seasoned marketing and operations leader with over a decade of experience spanning nonprofit and corporate sectors. Her diverse background includes impactful roles at the Red Cross, Philip Morris, and the Erasmus Student Network. As the Director of Operations at DesignRush, she excels in strengthening agency relationships, spearheading data-driven outreach, and optimizing operational workflows. In her tenure leading the Agency Directory, she achieved 200% of projected growth within six months, setting a new standard for team performance.
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