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Top Advertising Companies in California

30 of 139 advertising companies ranked on evidence in the Q4 2026 edition.

Between them, the 139 advertising companies on this page cover advertising (40), creative (34), consumer products & services (29) and business services (25). They also list work in Los Angeles, San Diego, New York and York. 139 of them have written a profile you can read before you get in touch.

TrustList ranking

Q4 2026 edition

30 of 139 advertising companies ranked on evidence held on 5 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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All advertising companies 30 ranked SMEs 30 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.
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 #2: 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 #3: 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.
Brandtailers
Also in Newport
Brandtailers is a marketing and creative agency in Newport Beach, California, working since 1990.
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Why #4 (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 #4 (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.
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 #6: 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 #7: 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 #8: 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.
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 #9: Based in Fresno, California, USA · Founded 1996 — as stated on its own website, read 29 Sept 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 #10 (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.
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 #10 (shared): Address in California · Founded 1997 — as stated on its own website, read 5 Oct 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 #12: Based in Los Angeles, California · Founded 1999 — as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
Immix Productions Inc.
Immix Productions Inc. is a creative studio headquartered in Houston that has worked since 2001.
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Why #13 (shared): Office in California · Founded 2001 — as stated on its own website, read 29 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 #13 (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.
Forty Forty Agency
Consumer Products & Services · Arts, Entertainment & Music · Hospitality & Leisure · Also in Oklahoma
Forty Forty Agency is a branding studio in Sausalito, California, that has been building brands and brand experiences since 2002.
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Why #15 (shared): Based in Sausalito, California · Founded 2002 — as stated on its own website, read 29 Sept 2026
Not yet on record: client reviews, vetting.
Deniro Marketing
Advertising · Internet · Collaboration
Deniro Marketing is a search marketing company founded in 2002 and based in the San Joaquin Valley of Central California.
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Why #15 (shared): Based in San Joaquin Valley, Central California · Founded 2002 — as stated on its own website, read 29 Sept 2026
Not yet on record: client reviews, vetting.
LACED Agency
Consumer Products & Services · Information Technology · Retail
LACED Agency is a marketing agency based in Redondo Beach, California and Scottsdale, Arizona.
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Why #15 (shared): Based in Redondo Beach, California and Scottsdale, Arizona, USA · Founded 2002 — as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
3fold Communications
Sacramento marketing and advertising agency focused on community connection for public bodies, nonprofits and businesses
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Why #18: Based in Sacramento, California, USA · Founded 2004 — as stated on its own website, read 28 Sept 2026
Not yet on record: client reviews, vetting.
Eight Horses
Advertising · Creative · Also in Orange County
Eight Horses is a full-service advertising agency in Orange County, California, formed in 2006. Clients often use it as a ready-made marketing department.
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Why #19: Based in Orange County, California, United States · Founded 2006 — as stated on its own website, read 29 Sept 2026
Not yet on record: client reviews, vetting.
Conure Media
Business Services · Real Estate · Creative
Conure Media, trading as Conure, is a web operations company for organisations that depend on WordPress.
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Why #20: Based in Los Gatos, California · Founded 2010 — as stated on its own website, read 28 Sept 2026
Not yet on record: client reviews, vetting.
Green Street Agency
Legal Cannabis
Green Street Agency is a creative agency and brand house dedicated to the cannabis industry. It was founded in 2013 and is co-owned by Gary Vaynerchuk.
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Why #21: Based in Los Angeles area, California · Founded 2013 — as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
DGL Media Services
Advertising & Marketing
DGL Media Services is a digital marketing agency in Santa Rosa, California, that has worked with businesses around the San Francisco Bay Area since 2015.
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Why #22 (shared): Based in Santa Rosa, California, USA · Founded 2015 — as stated on its own website, read 29 Sept 2026
Not yet on record: client reviews, vetting.
Brandlift Digital Marketing
Consumer Products & Services · Business Services · Information Technology
Brandlift Digital Marketing is a digital marketing agency in San Diego, California, working since 2015.
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Why #22 (shared): Based in San Diego, California, USA · Founded 2015 — as stated on its own website, read 28 Sept 2026
Not yet on record: client reviews, vetting.
DPGW
DPGW, styled dpgw, is an independent creative agency founded in 2017 and headquartered in Los Angeles, with creative teams in other countries.
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Why #24 (shared): Based in Los Angeles, California, USA · Founded 2017 — 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

Davies Associates, Inc.

Gumas

Brandtailers

A Hundred Monkeys

IDG Advertising

Epic Ad Group

IBCnet

DigitalFirst.us

Boylan Point Agency

Irep Inc

ES Advertising, Inc.

Immix Productions Inc.

Kaleidoscope Consulting Group

Forty Forty Agency

Deniro Marketing

LACED Agency

3fold Communications

Eight Horses

Conure Media

Green Street Agency

DGL Media Services

Brandlift Digital Marketing

DPGW

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