Best influencer marketing agencies for Boston brands

Published by Growth Partner Index Editorial Desk · Editorial policy

Influencer marketing agencies find creators, manage briefs and contracts, and increasingly run paid amplification of creator content.

8 influencer marketing agencies are listed below by published Growth Partner Confidence Score, led by inBeat, The Shelf, Fieldtrip. Each card shows where the agency is based.

The shortlist

Ranked by Growth Partner Confidence Score · Boston-area offices and remote agencies are labelled on each card

  1. 1
    inBeat logo
    inBeat88.5/100Based in New York, NY & Los Angeles, CA · US campaigns documented

    Runs UGC production, creative strategy, ad testing and paid social on Meta and TikTok in one team. Source.

    Full profileVisit website$250k–$1M/mo

  2. 2
    The Shelf logo
    The Shelf82/100 IndependentBased in Atlanta, GA · remote option

    Influencer marketing agency with creator strategy and paid amplification. Source.

    Full profileVisit website$50k–$250k/mo

  3. 3
    Fieldtrip logo
    Fieldtrip80/100Based in New York, NY · remote option

    Reports on-location shoots casting athlete creators that produced 100+ UGC assets. Source.

    Full profileVisit website$50k–$250k/mo

  4. 4
    The Outloud Group logo
    The Outloud Group69/100 IndependentBased in Detroit, MI · remote option

    Influencer program case for SimpliSafe (agency-reported). Source.

    Full profileVisit website$50k–$250k/mo

  5. 5
    The Influencer Marketing Factory logo
    The Influencer Marketing Factory68/100 IndependentBased in Miami, FL · US campaigns documented

    Full-service influencer agency; Hisense case recruited US, Mexico and Canada creators (agency-reported). Source.

    Full profileVisit websiteNot disclosed

  6. 6
    lotus823 logo
    lotus82366/100 IndependentBased in Red Bank, NJ · US campaigns documented

    Combines influencer marketing with PR and social. Source.

    Full profileVisit websiteUnder $10k/mo

  7. 7
    Collectively logo
    Collectively60/100 IndependentBased in New York, NY · remote option

    Household CPG case: year-long creator program for Seventh Generation (agency-reported). Source.

    Full profileVisit websiteNot disclosed

  8. 8
    Linqia logo
    Linqia58/100 IndependentBased in San Francisco, California · remote option

    Food and beverage CPG case: creator program for International Delight (agency-reported). Source.

    Full profileVisit websiteNot disclosed

What to look for

  • Ask how creators are vetted for audience fit and brand safety.
  • Ask whether whitelisting or allowlisting is included and for how long.
  • Agree up front how results are measured beyond views.
  • If you sell to Boston's student or healthcare-adjacent audiences, ask for examples aimed at similar audiences rather than generic consumers.
  • Ask whether they can show creators with Boston audiences, or whether their roster is mainly national.

How we picked

Each agency has a published Growth Partner Confidence Score and an official source documenting influencer marketing work, linked on its card. For this page, each agency has a documented creator or influencer program offer or case. Agencies with a Boston-area office are labelled; the others are listed as remote options from their US location (or documented US campaigns) and client work, an editorial suitability judgement rather than a verified remote-service promise. Scores were not changed for this page, and results quoted from agency sources are self-reported.

Read the full Growth Partner Confidence Score methodology, or submit a correction if something here is wrong.

Frequently asked questions

What should an influencer agency handle?
Creator sourcing, outreach, contracts, content approvals and reporting. Stronger agencies also run paid amplification and negotiate usage rights.
Are these agencies based in Boston?
No local office is verified for this shortlist. These agencies are included as remote options based on documented work; each card shows the agency's actual base. Confirm availability and any in-person requirements.
Can a remote agency handle a Boston brief?
Usually, for strategy, media and most creative. If you sell to Boston's student or healthcare-adjacent audiences, ask for examples aimed at similar audiences rather than generic consumers.
How much do influencer marketing agencies charge?
Expect a management fee plus creator fees; usage rights and paid amplification are often priced separately. Each profile lists the agency's disclosed budget band where available.
Can agencies pay to be listed or ranked?
No. Order follows the published Growth Partner Confidence Score. Growth Partner Index is owned by Fieldtrip; Fieldtrip, inBeat, 9AM and Creative Milkshake are affiliated and labelled on their cards.

Keep exploring

Ownership disclosure

Growth Partner Index is owned by Fieldtrip. Fieldtrip, inBeat, 9AM and Creative Milkshake are affiliated. Numbered order cannot be bought.