Best Social Media Agencies in Boston (2026)

Introduction

Boston’s social media agencies are mostly PR, digital and integrated firms that run social, influencer and community work alongside media relations or paid media. The 10 firms below cover influencer marketing, organic and paid social, and social-led PR, and were chosen for current client rosters, recent work and evidence of an active Boston office in 2026.

The city has fewer standalone social-first shops than New York or Los Angeles, and a larger share of B2B technology, healthcare and higher education clients. That shapes the work: LinkedIn programmes, executive social and B2B creator campaigns sit next to consumer influencer work for food, retail and lifestyle brands. Ownership has shifted too. Amp, the Boston-headquartered agency owned by Advantage Solutions, merged with Advantage Unified Commerce in late 2025, and Later, the influencer marketing company that grew out of Mavrck, keeps its Boston office on State Street.

Every firm here has an active office in Greater Boston in 2026. The list is in no fixed order of merit. Full-funnel and performance firms are covered on our marketing agencies page, and idea-led campaign shops on the creative agencies page.

The best social media agencies in Boston

1. Amp | Advantage Marketing Partners

Advantage Solutions · Financial District · ampagency.com

Amp is a marketing agency headquartered at 75 State Street in Boston, with further offices in New York, Chicago, Dallas, Los Angeles, Minneapolis, San Francisco and Seattle. It is owned by Advantage Solutions, which unified Amp with Advantage Unified Commerce in October 2025, and it trades as Amp | Advantage Marketing Partners. Chief Marketer named it among its 2025 Top Agencies of the Year.

Digital and social sits alongside creative, retail and commerce, and media in its offer, and its “Face Plant” campaign won at the Shorty Awards. Clients include Starbucks, Ferrero, Reckitt, Bayer, SC Johnson and Kenvue, with recent work for Tyson Foods, UPPAbaby and Aquaphor. It suits consumer packaged goods brands that want social tied to retail and shopper marketing.

2. Later

Financial District · later.com

Later is an influencer marketing company with offices in Boston (53 State Street) and Vancouver. Its roots are in Mavrck, founded as Splashscore in 2014, which acquired the social scheduling platform Later in 2022; the two have operated under the Later name since 2024. In February 2026 it launched Later 360, a unified reporting suite, and it rebranded at SXSW 2026.

Alongside its software, the Later Influence team plans, produces and manages creator campaigns for brands. Clients named in its recruiting materials include Nike, Wayfair, Unilever and Southwest Airlines. It is a fit for brands running influencer programmes at volume that want the platform data and the campaign team from one company.

3. FINN Partners Boston

FINN Partners · Financial District · finnpartners.com

FINN Partners’ Boston office grew out of Small Army, the Boston digital agency co-founded by Jeff Freedman and Mike Connell, which FINN acquired in February 2019. The old smallarmy.net address now points to FINN’s Boston page. Senior partner Jodi Petrie leads the office, which lists its address as 200 State Street.

Influencer marketing is one of FINN’s core services, with an in-house influencer intelligence team and an emphasis on micro and nano creators. Boston-area case studies include Cuisinart, Code42, Wentworth Institute of Technology, Dedham Savings Bank and GBH, and Small Army’s client list brought in Boston Medical Center, MegaFood and the Massachusetts Office of Travel and Tourism.

4. Dig & Dig

The PHA Group · West End · diganddig.com

Dig & Dig is a digital and social media agency headquartered at 200 Portland Street, near North Station. It is part of The PHA Group, the UK communications group, which gives its Boston team access to social, digital and PR specialists in London. Executive vice president Matt Raven runs day-to-day operations.

Services cover social media strategy, creative and community management, influencer partnerships, paid media, search and generative engine optimisation. Clients include Butter Payments, Liferaft, Risk Ledger, Mezmo, Workstorm and Beekley Medical, a mix that leans towards B2B technology; Victoria Beckham also appears among its client logos.

5. Cercone Brown Company

New York and Boston · cerconebrown.com

Cercone Brown Company (CBC) is a strategic communications agency founded in 2001, with offices in Boston and New York. It works with consumer brands it describes as making lives better, and runs a dedicated influencer programme alongside media relations, events and AI visibility work.

Its client list is strong in food, family and New England consumer brands: Stonewall Kitchen, Cabot, MegaFood, Garnet Hill, Milo’s Sweet Tea, Medela and Cleary Insurance. It is a good shortlist candidate for consumer packaged goods and lifestyle brands that want influencer relations run by the same team as their press work.

6. The Castle Group

Women-owned · Charlestown Navy Yard · thecastlegrp.com

The Castle Group is a digital and social PR firm based at 38 Third Avenue in the Charlestown Navy Yard, co-founded by principal Sandy Lish. 2026 is its 30th anniversary year, and it appears on Inc.’s 2026 Power Partner Awards list for the third time. It is a member of the Public Relations Global Network.

The firm combines social media with PR, events and crisis communications, including social media crisis training. Clients and partners include MassBio, SHI International, the Greater Boston Food Bank, Boys & Girls Clubs of Boston, Stacy’s Pita Chips and the City of Boston, and it has worked on Amgen’s 25-year Kendall Square celebration. It suits Boston institutions and life sciences companies that need social handled with reputation in mind.

7. SHIFT Communications

Padilla (AVENIR GLOBAL) · Boston · shiftcomm.com

SHIFT is a PR and marketing agency headquartered in Boston and now a division of Padilla within the AVENIR GLOBAL network, with further offices in New York, Chicago and San Francisco. It sells what it calls performance communications across paid, earned, shared and owned channels, and has added AI search visibility to the mix.

Its social offer covers audits, paid amplification, influencer marketing and community management, including B2B influencer programmes. Case studies include McDonald’s, Citrix, Talkdesk, Butterfly Network and Wedderspoon, and the wider roster takes in Wayfair, TripAdvisor, Rapid7 and Red Hat.

8. Beantown Media Ventures (BMV)

Financial District · beantownmv.com

Beantown Media Ventures is a PR and content agency for B2B technology companies, many of them venture-backed, with headquarters at 75 State Street and a second office in Santa Monica. It has more than a decade in business and an AI PR practice covering model labs, infrastructure and applied AI.

Influencer marketing runs through BrandCirc, its own platform for finding and working with creators, and the agency also produces social content and manages paid social. Recent clients include Pindrop, VergeSense, Greyparrot, Jobright, Boson AI and EnergySage. It is well suited to startups that want PR, social and creator work on one retainer.

9. Matter Communications

North End · matternow.com

Matter is a PR, marketing and creative agency with its Boston office at 98 North Washington Street, working across B2B technology, healthcare and consumer brands. It publishes an annual PR playbook, updated for 2026.

Social media marketing and influencer marketing both sit in its offer, covering organic and paid social, audits, executive social and social crisis communications. Clients include Salesloft, Segway, Roche Bros., Food Lion, Michaels and CVS Health. It suits technology, healthcare and consumer brands that want social run alongside media relations.

10. Zozimus

Government Center · zozimus.com

Zozimus is a Boston digital marketing agency founded more than 20 years ago, based at 25 New Chardon Street. It covers digital marketing, brand strategy, creative, PR and social media, and has added answer and generative engine optimisation to its services.

Social is usually bought as part of an integrated programme with paid media and search, as in its work for Procept. Other clients include Hood Cottage Cheese, the Autism Society of America, Bryant University and On Deck Sports. It suits mid-sized brands and colleges that want social measured against the same targets as their paid and search budgets.

What to look for in a Boston social media agency

Start with the audience and the platform. A B2B software company needs an agency fluent in LinkedIn, executive social and analyst-adjacent creators, which is where firms such as BMV, SHIFT and Dig & Dig spend much of their time. Consumer brands selling food, retail or lifestyle products will get more from influencer-led shops and PR firms with consumer rosters, such as Cercone Brown, Later or Amp.

Ask how influencer work is sourced and paid. Some agencies use their own platforms, as BMV does with BrandCirc and Later does with its software, while others work through relationships and third-party tools. Check who holds creator contracts and usage rights, how disclosure is handled, and whether paid amplification of creator posts is included or billed separately.

In regulated sectors, look at the approval path. Healthcare, life sciences, financial services and higher education all bring legal or medical review into social posting. Ask for examples in your category, how long a typical approval takes, and how the agency handles responses to comments during a crisis.

Finally, look at how the agency runs the content calendar. A month of social produces dozens of posts, cut-downs, captions, creator drafts and reports, often spread across email, chat and several drives. Agencies with one place for the calendar, a clear review flow and the latest approved version easy to find are easier to work with over a long relationship.

How Fabric helps social media agency teams

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Any folder can become a kanban board whose cards are the files themselves, so a content pipeline moves from draft to review to scheduled without a separate tracker. Search works by meaning across documents, images, PDFs and transcribed audio and video, and colour search finds visual assets by shade, which helps when a team needs last spring’s product shots or a creator’s earlier cut. Video files stream from Fabric’s cloud drive on demand, so they take no local disk space.

For client review, any file or folder can be published as a web page and protected with a password. Clients leave threaded comments through a shared link without creating an account, and the review and approval workflow keeps feedback on captions, decks and PDFs in one place. Reviewers can also leave timestamped comments on video and audio and draw on images.

On Team plans, self-writing docs maintain a page for each client from meetings, Slack and the workspace, covering decisions, deliverables and open items, so a new community manager can pick up an account quickly.

Password protection is included on Pro and Team plans, and self-writing docs on Team plans, from $125 a month. See plans for teams.

Frequently asked questions

What is the best social media agency in Boston?

It depends on the brief. For influencer programmes at scale, Later runs creator campaigns from its Boston office with its own platform behind them. For consumer brands, Cercone Brown and Amp have strong food and packaged goods rosters. For B2B technology, BMV, SHIFT and Dig & Dig combine social with PR or search.

Which Boston agencies specialise in influencer marketing?

Later is the most influencer-focused firm on this list. FINN Partners’ Boston office has an in-house influencer intelligence team, Cercone Brown runs a dedicated influencer programme for consumer brands, and BMV sources creators for B2B tech clients through its BrandCirc platform.

Do Boston social media agencies work with B2B companies?

Yes, more than in most US cities. BMV, SHIFT, Dig & Dig and Matter all build much of their social work around technology companies, with LinkedIn, executive social and B2B creator programmes. If you need wider demand generation as well, see our list of marketing agencies in Boston.

What does a social media agency in Boston cost?

Most work on monthly retainers set by the number of channels, posts and reports, with paid media budgets and creator fees billed separately. Influencer campaigns are often priced per programme. Ask for a scoped proposal that separates agency fees, creator payments and ad spend.

Should I choose a social-first agency or a PR firm with a social practice?

A PR firm with a social practice suits brands where press coverage, reputation and social need to move together, which is common in healthcare, life sciences and technology. An influencer or social specialist suits brands where creator content and volume drive sales. Many Boston firms on this list sit between the two.

Related lists

Social media agencies in other cities: New York · Los Angeles · Chicago · London · Seattle

More in Boston: Creative agencies · Marketing agencies · Advertising agencies · Branding agencies · Photography studios · UX design agencies

Run your agency on Fabric: Fabric for agencies · Content planning in Fabric · Best client portal tools