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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.

How this is ranked About this edition

All advertising companies 52 ranked SMEs 52 ranked

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Blackthorn Publishing
Blackthorn Publishing is a media and web design agency in Los Angeles, California, that has been building sites and marketing brands since 2013.
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Why #1: Based in Los Angeles, California · Founded 2013 · Shopify partner, as stated on its own website, read 28 Sept 2026
Not yet on record: client reviews, vetting.
Deviate Labs, LLC
Consumer Products & Services · Arts, Entertainment & Music · Hospitality & Leisure
Deviate Labs, LLC is a growth marketing agency based in Los Angeles.
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Why #2: Based in Los Angeles, California, US · Founded 2014 · Client numbers stated on its own website, as stated on its own website, read 29 Sept 2026
Not yet on record: client reviews, vetting.
JP Marketing
Business Services · Financial Services · Real Estate
JP Marketing was an advertising agency in California that has since renamed itself HYPHEN.
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Why #3: Based in Fresno, California, US, with an office in Sacramento · In business 30+ years · Team of 26+, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
Davis Elen
Consumer Products & Services · Financial Services · Automotive
Davis Elen is an independent advertising agency on the US West Coast with more than 75 years of history.
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Why #4: Based in Los Angeles, California, United States · In business 75+ years, as stated on its own website, read 29 Sept 2026
Not yet on record: client reviews, vetting.
Davies Associates, Inc.
Advertising · Creative · Retail
Davies Associates, Inc. is a graphic design studio in Los Angeles, California, founded in 1980 and led by principals Noel and Cathy Davies.
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Why #5: Based in Los Angeles, California, USA · Founded 1980, as stated on its own website, read 29 Sept 2026
Not yet on record: client reviews, vetting.
Gumas
Financial Services · Information Technology · Digital Marketing
Gumas is a San Francisco advertising agency that developed an approach it calls Challenger Brand Marketing.
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Why #6: Based in San Francisco, California, USA · Founded 1984, as stated on its own website, read 29 Sept 2026
Not yet on record: client reviews, vetting.
Ekc PR
Social Media Management · Digital Marketing · Reputation Management
EKC PR, also known as Eileen Koch and Company, is a public relations, branding and digital marketing firm headquartered in Los Angeles and Beverly Hills, California.
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Why #7: Based in Los Angeles and Beverly Hills, California · In business 38+ years, as stated on its own website, read 29 Sept 2026
Not yet on record: client reviews, vetting.
Brandtailers
Also in Newport
Brandtailers is a marketing and creative agency in Newport Beach, California, working since 1990.
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Why #8 (shared): Based in Newport Beach, California · Founded 1990, as stated on its own website, read 28 Sept 2026
Not yet on record: client reviews, vetting.
A Hundred Monkeys
Consumer Products & Services · Arts, Entertainment & Music · Gaming
A Hundred Monkeys is a naming and writing studio in Berkeley, California, working since 1990.
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Why #8 (shared): Based in Berkeley, California, US · Founded 1990, as stated on its own website, read 28 Sept 2026
Not yet on record: client reviews, vetting.
Decca Design
Branding · Environmental
Decca Design is a full-service design and marketing agency in San Jose, California, with 35 years of history in Silicon Valley.
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Why #10: Based in San Jose, California, USA · In business 35+ years, as stated on its own website, read 29 Sept 2026
Not yet on record: client reviews, vetting.
IDG Advertising
Advertising · Creative · Also in Orange County
IDG Advertising is a full-service marketing agency in Orange County, California, working since 1992.
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Why #11: Based in Anaheim, Orange County, California · Founded 1992, as stated on its own website, read 29 Sept 2026
Not yet on record: client reviews, vetting.
Epic Ad Group
Advertising · Goals · Also in Santa Barbara, Ca
Epic Ad Group is an advertising agency serving businesses on the Central Coast of California. It says it has provided marketing services there since 1993.
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Why #12: Based in Santa Barbara, California · Founded 1993, as stated on its own website, read 29 Sept 2026
Not yet on record: client reviews, vetting.
IBCnet
Supply Chain, Logistics, and Transport · Arts, Entertainment & Music · Hospitality & Leisure
IBCnet is a web development company based in Los Angeles, California. It says it was established in 1994 and has built hundreds of websites, including for e-commerce businesses.
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Why #13: Based in Los Angeles, California, USA · Founded 1994, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
559 Graphics
559 Graphics is a web design and marketing studio in Fresno, California.
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Why #14 (shared): Based in Fresno, California · In business 30+ years, as stated on its own website, read 28 Sept 2026
Not yet on record: client reviews, vetting.
Lagrant Communications
Los Angeles communications agency marketing to Hispanic, African American and LGBTQIA+ audiences for corporate and public clients
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Why #14 (shared): Based in Los Angeles, California, USA · In business 30+ years, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
Krasovetz Consulting
Digital Marketing · Web Design · SEO · Also in Virginia and Los Angeles
Krasovetz Consulting is listed as a digital marketing agency in San Diego, California, and its website trades under the name Digital Creatives.
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Why #14 (shared): Based in San Diego, California · In business 30+ years, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
Farinella LLC
Consumer Products & Services · Arts, Entertainment & Music · Hospitality & Leisure
Farinella LLC is a full-service branding and marketing agency near Oakland, California. Its work rests on the idea that a clear message persuades more than a clever one.
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Why #14 (shared): Based in Near Oakland, California, United States · In business 30+ years, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
DigitalFirst.us
Consumer Products & Services · Hospitality & Leisure · Business Services · Also in Reading
DigitalFirst.us is a Fresno advertising consultancy led by Russ Parsley, who began advising businesses on digital media in 1996.
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Why #14 (shared): Based in Fresno, California, USA · Founded 1996, as stated on its own website, read 29 Sept 2026
Not yet on record: client reviews, vetting.
Irep Inc
Consumer Products & Services · Arts, Entertainment & Music · Energy & Natural Resources · Also in Japan
Irep Inc is a digital marketing agency with headquarters in Tokyo and a base in the San Francisco Bay Area.
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Why #19 (shared): Address in California · Founded 1997, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
Boylan Point Agency
Sonoma County marketing agency covering websites, search marketing, branding and traditional advertising for local businesses
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Why #19 (shared): Based in Santa Rosa, California · Founded 1997, as stated on its own website, read 28 Sept 2026
Not yet on record: client reviews, vetting.
ES Advertising, Inc.
Arts, Entertainment & Music · Financial Services · Advertising
ES Advertising, Inc. is a full-service advertising agency based in Los Angeles.
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Why #21: Based in Los Angeles, California · Founded 1999, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
Bloom Ads
Bloom Ads plans and buys advertising for brands and agencies from its base in Woodland Hills, California.
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Why #22 (shared): Based in Woodland Hills, California · In business 25+ years, as stated on its own website, read 28 Sept 2026
Not yet on record: client reviews, vetting.
KC
Kaleidoscope Consulting Group
Supply Chain, Logistics, and Transport · Business Services · Financial Services · Also in Los Angeles
Kaleidoscope Consulting Group is a design and marketing firm that has been operating since 2001. It builds websites for small businesses in Los Angeles and across the country.
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Why #22 (shared): Based in Los Angeles, California, USA · Founded 2001, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
Elkins Advertising
Elkins Advertising is an advertising agency in San Jose, California.
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Why #22 (shared): Based in San Jose, California · In business 25+ years, as stated on its own website, read 29 Sept 2026
Not yet on record: client reviews, vetting.

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Top Advertising Companies in California

Blackthorn Publishing

Deviate Labs, LLC

JP Marketing

Davis Elen

Davies Associates, Inc.

Gumas

Ekc PR

Brandtailers

A Hundred Monkeys

Decca Design

IDG Advertising

Epic Ad Group

IBCnet

559 Graphics

Lagrant Communications

Krasovetz Consulting

Farinella LLC

DigitalFirst.us

Irep Inc

Boylan Point Agency

ES Advertising, Inc.

Bloom Ads

Kaleidoscope Consulting Group

Elkins Advertising

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