Skip to content
TrustList
Companies · category

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.

Filter by fitbudget, engagement, size and more

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. Ink Refuge logo

    Advertising · Branding · Video · Also in Hamilton and Belize

    Ink Refuge is a small full-service digital agency based in Orange County, California.

    On record: Based in Orange County, California, USA

  3. InMotion DMA logo

    Advertising

    From Folsom, California, InMotion DMA runs paid search advertising for service businesses, with the aim of putting quote requests and phone calls in front of owners who are ready…

    On record: Based in Folsom, California

  4. Innocean USA logo

    Energy & Natural Resources · Financial Services · Retail

    Operating from Huntington Beach, California, Innocean USA is the US unit of the wider Innocean network and a full service ad agency.

    On record: Based in Huntington Beach, California

  5. Ionic Media logo

    Analytics · Driving

    Campaigns built on audience data are the basis of Ionic Media, a marketing and media agency with offices in Woodland Hills, California, and New York.

    On record: Based in Woodland Hills, California and New York, USA

  6. ITAL/C logo

    Arts, Entertainment & Music · Hospitality & Leisure · Non Profit · Also in York and New York

    ITAL/C is a multidisciplinary creative studio based in Los Angeles, California. Its designers build brands from the ground up and steer established brands in new directions.

    On record: Based in Los Angeles, California, USA

  7. Januaryfall logo

    Januaryfall is a graphic and web design practice in Davis, California, run by a single designer. It produces custom print and digital work for businesses.

    On record: Based in Davis, California, USA

  8. Jon Byk Advertising logo

    Jon Byk Advertising, which trades as Byk Advertising, is based in Los Angeles and places the recruitment advertisements that employers must run when they seek permanent labor…

    On record: Based in Los Angeles, California, USA

  9. Kaizen Sigma LLC logo

    Arts, Entertainment & Music · Advertising & Marketing · Business Services

    From Pasadena, California, Kaizen Sigma runs social media, search, websites and paid advertising for brands that want one team to handle their marketing.

    On record: Based in Pasadena, California

  10. Kilter LA logo

    Kilter LA is a design and communications agency in Los Angeles.

    On record: Based in Los Angeles, California

  11. Knighthood Studio logo

    Knighthood Studio is a small marketing agency in Orange County, California.

    On record: Based in Orange County, California

  12. Lamb Consulting logo

    Energy & Natural Resources · Hospitality & Leisure · Business Services · Also in San Francisco

    Lamb Consulting is a marketing, advertising and web and graphic design firm run by Debbie Lamb, who has more than 20 years of experience in marketing and project management for…

  13. Lead Marvels, Inc. logo

    Content Marketing · Lead Generation · Analytics · Also in York and New York

    Lead Marvels operates an online meeting point for professional associations, their members and B2B marketers.

  14. Leadstak logo

    Partners · Also in Newport

    Leadstak is a pay-per-lead marketing agency based in Newport Beach, California.

    On record: Based in Newport Beach, California, United States

  15. Legal Marketing Plus logo

    Advertising · SEO · Internet · Also in Detroit and Manhattan

    Legal Marketing Plus is a digital marketing agency that works only with law firms.

For vendors

Want to see your company here?

The order is earned on evidence: client reviews, vetting, awards and the facts a business states on its own website, which we read and date. Nobody can pay to move up. Add reviews or verified facts to your free profile to move up at the next edition; there are two ways to stand out now, and each one says what it is.

Not on TrustList yet? Add your company or claim its listing, free.

Get vetted

Free

  • We check your registration, your website and your clients
  • Approved listings show the Verified badge here and on their profile
  • It earns a rank number and counts towards the TrustList Score; renewed yearly

Sponsor this ranking

Paid · always labelled

  • A Sponsored card above the ranked list, up to three per ranking
  • Marked Sponsored, and it never changes the order
  • Booked by the month; cancel any time
Same subject

More advertising companies rankings

Every other way we rank advertising companies, by what they do and where they are.

All 356 rankings
Articles

Related reading

Articles on this subject first, then the newest.

All articles
Browse

More categories

Jump to another ranked category.

All categories