Top 10 Influencer Marketing Agencies in the USA (2026)
The top 10 influencer marketing 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
The serious agencies in this category stopped calling it influencer marketing years ago. To them it's a paid channel that happens to use people instead of stock libraries. Sourcing, briefing, FTC-compliant disclosure, usage rights, paid amplification via whitelisting or Spark Ads, and an incremental sales number at the end of the month. PR theater doesn't survive contact with that workflow.
We surfaced the highest-scoring US shops from the Growth Partner Index's Influencer & Creator Marketing category. Every profile carries cited public evidence and a Confidence Score that weighs disclosure posture, platform fluency, and actual outcomes. Not follower counts in the case study.
If you're running creator commerce, the operators that move the needle are the ones with named platform specialists: TikTok Shop, Instagram, YouTube, Amazon Live. The reporting you want shows cost-per-acquired-customer, not vanity reach charted in a quarterly slide.
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
Influencer, founded in 2015 by Ben Jeffries and Caspar Lee, is a London-headquartered global creator marketing agency with 200+ staff across 9 hubs that has delivered 6,000+ campaigns and paid creators over $1B.
Full profileVisit website$50k–$250k/mo
- 3
Influential is a Las Vegas-headquartered influencer marketing company describing itself as the world's largest, with a 3.5M-creator network, IBM Watson-powered matching, $500M+ in campaign revenue, and work for Experian, Reese's, and Walmart.
Full profileVisit website$250k–$1M/mo
- 4
Shortform Studio briefs, sources, and edits UGC creators for paid testing on TikTok and Meta, with usage rights bundled.
Full profileVisit website$10k–$50k/mo
- 5
Collectively is an AI-powered creator marketing agency that has contracted over 7,500 creators across 1,700-plus campaigns for brands like Nike and Dove.
Full profileVisit website$250k–$1M/mo
- 6
The Shelf is a data-first influencer marketing agency that uses a proprietary SaaS platform to execute full-funnel campaigns for enterprise brands.
Full profileVisit website$250k–$1M/mo
- 7
Carusele is an award-winning influencer marketing agency that develops and manages data-driven influencer programs for leading consumer brands and retailers, using real-time data to optimize campaign performance and drive measurable business results.
Full profileVisit website$10k–$50k/mo
- 8
Viral Nation is a global digital marketing agency that specializes in influencer marketing, talent representation, and social media marketing, offering a complete suite of creator services powered by proprietary technology.
Full profileVisit website$10k–$50k/mo
- 9
Open Influence is a global influencer marketing agency that provides full-service creator marketing solutions, including strategy, campaign management, and paid media amplification.
Full profileVisit website$1M+/mo
- 10
Later Influence (formerly Mavrck) is an enterprise-level influencer marketing platform and agency that provides tech-enabled campaign management, creator discovery, and performance tracking.
Full profileVisit website$50k–$250k/mo
How we picked
Picks are agencies tagged to the influencer-creator category, sorted by Confidence Score. We weight disclosure posture and creative-media integration for this list.
Read the full Growth Partner Confidence Score methodology, or submit a correction if something here is wrong.
Frequently asked questions
- Who is the #1 influencer marketing agency in the USA in 2026?
- inBeat ranks #1 among influencer marketing agencies in the USA for 2026 with a Growth Partner Confidence Score of 88.5/100. inBeat is based in Montréal, Canada and is best suited to cpg, ecommerce, technology, travel, and health brands. Influencer (72/100) 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 influencer marketing agency?
- Look for FTC-compliant disclosure practice, negotiated usage rights, whitelisting or Spark Ads capability, and reporting on cost per acquired customer rather than reach. 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 influencer marketing agencies charge?
- Most reputable shops want $20k–$50k/mo in total program spend, covering talent fees, paid amplification, and the agency fee. Management fees typically run 15–25% of talent spend. Every profile in this index lists the agency's disclosed budget band so you can filter before the first call.
- Influencer agency vs. influencer platform. Which do I need?
- Platforms like CreatorIQ, GRIN, and Aspire give you software and a marketplace. Agencies give you operators. The people sourcing, briefing, negotiating, amplifying, and measuring. Programs that scale usually run both, and stop arguing about it.
- Should I pay influencers per post or per outcome?
- Flat fees plus usage rights are the market standard. Pure performance deals exist but rarely with top-tier creators, who have alternatives. The cleanest structure most of the time is a flat fee plus whitelisted paid amplification, with incremental sales contribution as the scoreboard.
- How big a budget do I need to work with an influencer agency?
- Most reputable shops want at least $20k–$50k/mo in program spend, including talent, paid amplification, and agency fee. Below that line, an in-house coordinator or a freelancer will usually get more work done per dollar.