14 Nov 2026 · TrustList Editorial
California proposes independent audits for data brokers from 2028
CalPrivacy's notice also amends the data broker registration and DROP rules; written comments close at 5 p.m. Pacific on 6 January 2027,…
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.

Supply Chain, Logistics, and Transport · Consumer Products & Services · Hospitality & Leisure
Avidon Marketing Group is a search and content marketing agency based in Los Angeles that was established in 2018.
Why #49: Based in Los Angeles, California, USA · Founded 2018, as stated on its own website, read 28 Sept 2026
Not yet on record: client reviews, vetting.

Consumer Products & Services · Advertising & Marketing · Automotive
Cast Iron LA is a small Los Angeles marketing and creative agency set up in 2019 by art director Luis Ramirez and copywriter J Barbush.
Why #50 (shared): Based in Los Angeles, California, United States · Founded 2019, as stated on its own website, read 28 Sept 2026
Not yet on record: client reviews, vetting.

Consumer Products & Services · Arts, Entertainment & Music · Hospitality & Leisure
D/CAL is a creative agency in Vista, California, set up in 2019 by skateboarder Tony Hawk together with advertising veterans.
Why #50 (shared): Based in Vista, California, United States · Founded 2019, as stated on its own website, read 28 Sept 2026
Not yet on record: client reviews, vetting.

Arts, Entertainment & Music · Financial Services · Information Technology · Also in Parma
Brainblaze Fine Advertising & Design is an agency on the North Bay side of the San Francisco Bay Area, serving Marin County and the wider region.
Why #52: Based in San Francisco North Bay and Marin County, California · Client numbers stated on its own website, as stated on its own website, read 28 Sept 2026
Not yet on record: client reviews, vetting.

Consumer Products & Services · Creative · Medical · Also in Maharashtra and Seoul
Brand naming company creating and testing product names, especially prescription drug names, with trademark and regulatory support
On record: In business 30+ years, as stated on its own website, read 28 Sept 2026

Advertising · Creative · Retail
Consortium Media is a brand development agency that joins marketing and public relations under one roof.
On record: In business 30+ years, as stated on its own website, read 28 Sept 2026

Education · Production · Goals · Also in New Jersey and Arizona
Evolve Public Relations and Marketing is a PR and marketing firm founded by Jennifer Kaplan in 2010. She earlier co-founded another firm in 2005.
On record: Founded 2010, as stated on its own website, read 5 Oct 2026

Creative · Branding · Also in Oregon and Portland, Oregon
A creative agency that works only with the craft beverage trade, High-Proof Creative builds brands and packaging for distilleries, spirits makers, tea and tonic producers and other…
On record: Founded 2018, as stated on its own website, read 5 Oct 2026
Advertising & Marketing · Business Services · Also in City of London and Edinburgh
Committed to the triumph of businesses, both big and small, Code & Peddle boast an impressive track record of delivering tangible and lasting results for our diverse clientele.
On record: Address in California

Echo-Factory is an advertising and marketing agency in Pasadena, California, that specialises in work around mergers and acquisitions.
On record: Based in Pasadena, California · Team of 20+, as stated on its own website, read 29 Sept 2026

Consumer Products & Services · Business Services · Financial Services
500 Designs is a digital design agency based in Irvine, California.
On record: Based in Irvine, California

Also in Pasadena
711 Media Marketing is a full-service agency that combines traditional marketing, advertising and digital marketing.
On record: Based in Pasadena, California, USA

Creative · Branding · Video
Graphic design and branding, alongside marketing consulting, come from Andrew Rea Design, a studio in Orange County, California.
On record: Based in Orange County, California, USA · Boutique

Lead Generation · Advertising
Advertising across online, broadcast and print media is placed by this full-service agency, which can run a whole campaign through one team.
On record: Based in Riverside, California, USA

Hospitality & Leisure · Business Services · Real Estate
Arpi Design is a graphic and web design studio in Los Angeles that has been building websites since 2010.
On record: Based in Los Angeles, California, USA

Creative · Production
Based in Los Angeles and trading as Axiom Print, AxiomPrint takes commercial printing orders online and builds its offer around speed.
On record: Based in Los Angeles, California

Blue Guardrail Marketing Agency, which also trades as Blue Guardrail Marketing & Design, works with small businesses and non-profits from Seattle and Palm Springs.
On record: Office in California

Advertising · Creative · SEO
BrandBoost is a marketing agency that works on getting businesses noticed, winning new customers and lifting sales.
On record: Based in Beverly Hills, California, USA

Advertising · Retail · Branding
Branding By Context, which goes by BXC, is an independent studio in Laguna Beach, California, working on visual identity and brand marketing.
On record: Based in Laguna Beach, California, United States

Consumer Products & Services · Medical · Manufacturing
A multicultural agency covering brand, communications and public affairs Branding Los Angeles describes itself as a leading multicultural strategic branding agency.
On record: Based in Los Angeles, California, United States

Advertising · Creative · Branding · Also in Reading
The Bay Area of California is home to Brandish Studio, a creative and website design firm.
On record: Based in Bay Area, California, USA

Consumer Products & Services · Hospitality & Leisure
Bright is a branding house in Los Angeles that has spent most of its working life around the food and drink aisle.
On record: Based in Los Angeles, California

Advertising & Marketing · Business Services · Information Technology
From its base in Los Angeles, BYStudio works as a branding and packaging design company.
On record: Based in Los Angeles, California

C&I Studios is a creative studio that makes video, photography, branding and web work for brands.
On record: Based in Los Angeles, California, United States
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