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Top Advertising Companies in California

52 of 134 advertising companies ranked on evidence in the Q4 2026 edition.

Between them, the 134 best-ranked of these 138 advertising companies cover advertising (37), creative (34), consumer products & services (28) and business services (25). They also list work in Los Angeles, San Diego, New York and York. 134 of them have written a profile you can read before you get in touch.

TrustList ranking

Q4 2026 edition

52 of 134 advertising companies ranked on evidence held on 12 October 2026: client reviews, vetting, awards and facts each business states on its own website, which we read and date. Nobody pays to be placed.

Positions are fixed for the quarter; the next edition is due in January 2027.

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Only businesses that have told TrustList match a filter. Filters never change the order or a score.

  1. Also listed, not yet ranked. We hold nothing checkable on these yet that ranks them here: no client review, vetting, award, expert review, or fact stated on their own website (and on a place ranking, where they are based). They follow in order of their TrustList Score. How TrustList ranks · Get vetted, free
  2. eMedia Marketing Solutions logo

    Advertising · Creative · Responsive

    eMedia Marketing Solutions is an advertising and marketing agency in Bakersfield, California.

    On record: Based in Bakersfield, California

  3. Engel Research Partners logo

    Creative · Partners

    Engel Research Partners is a marketing research consultancy based in San Bruno, California.

    On record: Based in San Bruno, California

  4. Epikta logo

    Consumer Products & Services · Arts, Entertainment & Music · Information Technology

    Epikta is an agency in Los Angeles that develops software, designs hardware products and creates brand identities.

    On record: Based in Los Angeles, California

  5. eSearch Marketing logo

    SEO · Also in San Diego, Ca and San Diego

    eSearch Marketing is a web design and online marketing agency in San Diego, California. It builds websites and then promotes them through search and advertising.

    On record: Based in San Diego, California, USA

  6. Esteemed Consulting Inc. logo

    Business Services · Information Technology · Retail

    From San Diego, Esteemed Consulting runs a confidential peer advisory group for chief executives and founders, with private executive coaching alongside it. The group is selective.

    On record: Based in San Diego, California

  7. eTrigue logo

    Business Services · Information Technology · Content Marketing

    eTrigue provides a partner marketing automation platform and a team that runs campaigns on behalf of technology vendors.

    On record: Based in San Jose, California, USA

  8. ED

    Education

    Evans Design is a digital marketing agency that describes itself as based in California and serving clients across the United States.

    On record: Based in California, United States

  9. EVB logo

    Consumer Products & Services · Arts, Entertainment & Music · Information Technology

    EVB, which stands for Evolution Bureau, is an advertising agency based in Oakland, California.

    On record: Based in Oakland, California, United States

  10. Executive Decision Marketing logo

    Consumer Products & Services · Business Services · SEO · Also in Austin and Seattle

    Executive Decision Marketing runs its SEO and online marketing from Los Angeles, and lists New York, Florida, Seattle and Canada as the homes of its affiliates.

    On record: Based in Los Angeles, California

  11. F23 logo

    Advertising · Creative · Also in Nice and Walnut Creek, California

    F23 is a marketing agency in Walnut Creek, California. It offers advertising, collateral design and website development, and adapts its services to each client.

    On record: Based in Walnut Creek, California, United States

  12. Factory Design Labs logo

    Content Marketing · Dashboard

    Marketing services provider offering websites, online sales, customer management and advertising tools for small businesses

  13. Feld Direct logo

    Feld Direct, operating as Feld Advertising, is an advertising agency and production company in San Francisco.

    On record: Based in San Francisco, California, USA

  14. Fidelitas logo

    Digital and traditional campaigns come out of San Diego, California, where Fidelitas operates as a full-service marketing agency.

    On record: Based in San Diego, California

  15. Fidelitas Development logo

    Fidelitas Development appears on the same website as Fidelitas, a full-service marketing agency in San Diego, California.

    On record: Based in San Diego, California

  16. Five Creative Group logo

    Consumer Products & Services · Real Estate · Medical

    Five Creative Group is a small branding and communications studio in Fresno and Clovis, California.

    On record: Based in Fresno and Clovis, California

  17. FOSSmg logo

    Advertising · Creative · Branding

    FOSSmg, the short name of Foss Marketing Group, has been an advertising and marketing agency since 2001.

  18. Fresno Webmasters logo

    Internet · Cloud

    Based in Fresno, California, Fresno Webmasters is a web design and marketing firm.

    On record: Based in Fresno, California, United States

  19. Gallegos United logo

    Advertising · Creative · Partnership

    Helping brands grow in what the agency calls today's America is the work of Gallegos United, an advertising agency built around cultural insight and creative work.

  20. Geared Advertising logo

    Consumer Products & Services · Hospitality & Leisure · Advertising & Marketing

    Geared Advertising is a small marketing agency in Orange County, California, built around brand development and digital work.

    On record: Based in Orange County, California, US

  21. Gerbo Designs logo

    Gerbo Designs is a creative and marketing agency in Modesto, California.

    On record: Based in Modesto, California, US

  22. Goozleology Inc logo

    Real Estate · Digital Marketing · Advertising

    Operating from San Diego, California, Goozleology Inc takes on digital marketing for local service firms.

    On record: Based in San Diego, California

  23. Group 181 logo

    Advertising · Creative · Branding · Also in Orange County

    Working out of Long Beach, California, Group 181 presents itself as a full-service creative advertising and marketing agency.

    On record: Based in Long Beach, California, USA

  24. Hype Media Group logo

    Creative · Automotive · Video · Also in Newport

    Hype Media Group is based in Long Beach, California, and builds its marketing work around car dealerships.

    On record: Based in Long Beach, California, USA

  25. in Focus Advertising logo

    in Focus Advertising is a full-service marketing and advertising agency in Agoura Hills, California.

    On record: Based in Agoura Hills, California · Small agency

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