Top 10 Advertising Agencies in the USA (2026)
The top 10 advertising agencies in the USA for 2026, ranked by Growth Partner Confidence Score with cited public evidence for every pick.
Updated July 27, 2026 · Compiled and reviewed by Growth Partner Index Editorial Desk
This shortlist ranks the 10 highest-scoring advertising agencies working in the USA, drawn from the 478 agencies currently in the Growth Partner Index. Ranking is by Growth Partner Confidence Score, which is built from public evidence only.
The agencies below are based in New York, NY & Los Angeles, CA, New York, NY, Kansas City, MO, Cleveland, OH. Each entry links to a full profile with the score breakdown, the sources behind it, disclosed budget band, and the services the agency actually staffs for.
Use it as a starting shortlist, not a verdict. A high score means the public evidence is strong; it does not mean the agency is the right fit for your budget, category, or measurement maturity.
The shortlist
Ranked by Growth Partner Confidence Score
- 1
inBeat is a performance creative agency that turns UGC and influencer partnerships into high-converting ads, with expertise in paid media and growth marketing.
Full profileVisit website$250k–$1M/mo
- 2
9AM is a performance marketing agency specializing in media buying, creative strategy, and influencer marketing to drive profitable growth for DTC brands.
Full profileVisit website$250k–$1M/mo
- 3
Fieldtrip is a modular, full-service agency uniting strategy, creative, and media, formed by the teams behind inBeat Agency and Bluethings.
Full profileVisit website$50k–$250k/mo
- 4
BarkleyOKRP is a advertising agency based in Kansas City, MO working with QSR and Retail brands. Publishes 3 case studies with named clients and measurable outcomes, including Frontier Airlines, Red Lobster, Burger King.
Full profileVisit websiteNot disclosed
- 5
Code3 is a growth marketing agency based in Cleveland, OH working with Food & Beverage and Retail & Fashion brands. Publishes 4 case studies with named clients and measurable outcomes, including Chipotle Mexican Grill, Massimo Zanetti Beverage USA (MZB), Kroll (formerly Duff & Phelps).
Full profileVisit websiteNot disclosed
- 6
Creative Milkshake is a performance creative agency specializing in data-driven UGC and paid social ads for platforms like Meta and TikTok.
Full profileVisit website$10k–$50k/mo
- 7
Darkroom is a growth marketing agency based in Los Angeles, CA working with Home Goods and Fashion & Apparel brands. Publishes 3 case studies with named clients and measurable outcomes, including OLIPOP, Crate & Barrel, Everlane.
Full profileVisit website$50k–$250k/mo
- 8
Marketing Architects is a advertising agency based in Minneapolis, MN working with Home & Furniture and Insurance brands. Publishes 2 case studies with named clients and measurable outcomes, including Joybird, Trust & Will.
Full profileVisit websiteNot disclosed
- 9
Acadia is a growth marketing agency based in Atlanta, GA working with Retail/E-commerce and DTC brands. Publishes 3 case studies with named clients and measurable outcomes, including Fresh Thyme, European Wax Center, Casey's.
Full profileVisit websiteNot disclosed
- 10
QRY is a advertising agency based in Jersey City, NJ working with Ecommerce and Retail brands. Publishes 4 case studies with named clients and measurable outcomes, including Peak Design, Fittes, Cangshan.
Full profileVisit websiteNot disclosed
How we picked
Agencies qualify for this list by working in advertising and, for location lists, being headquartered in USA. Ranking is by Growth Partner Confidence Score, which is built from public, citable evidence only.
Read the full Growth Partner Confidence Score methodology, or submit a correction if something here is wrong.
Frequently asked questions
- Who is the #1 advertising agency in the USA in 2026?
- inBeat ranks #1 among advertising agencies in the USA for 2026 with a Growth Partner Confidence Score of 88.5/100. inBeat is based in New York, NY & Los Angeles, CA and is best suited to cpg, ecommerce, technology, travel, and health brands. 9AM (82/100) ranks second.
- How were these agencies selected?
- Every agency on this list is scored against the same seven-pillar Growth Partner Confidence Score: proof of outcomes, category fit, creative-media integration, reputation, operating maturity, buyer fit, and freshness. Scores are built only from public, citable evidence such as case studies, press, and interviews. Placement cannot be purchased, and sponsored listings are labelled and never re-ranked.
- What should I look for when choosing a advertising agency?
- Look for agencies that can defend a brand position and still answer to a CAC target. Ask to see the same brand's work across a full year, not a single launch. Beyond that, confirm the budget band matches yours and that the senior operator named in the pitch is the person who will actually run the account.
- How much do advertising agencies charge?
- Integrated brand-and-performance engagements typically start around $20k/mo, with production budgets quoted separately. Project-based campaign work runs $50k–$500k. Every profile in this index lists the agency's disclosed budget band so you can filter before the first call.