Clay agencies in Boston are harder to find than the city's startup scene suggests. When I checked all 185 partners in Clay's Solutions Partner directory, only three turned out to be based in Greater Boston.
So my top 10 Clay agencies in Boston mixes local and remote teams. FullFunnel, demandDrive and OpsLiftOff are based here. The rest are three Forge Experts and four US Clay partners, three of them in New York.
I judged each one on its Clay credential, build depth, CRM fit and who owns the work afterwards. If you are still deciding whether Clay fits your stack, my Clay review covers the platform itself.
The format mirrors my guide to lead generation agencies in Sydney. Every location tag below shows where a team is actually based, so remote partners are labelled as remote.
Vanderbuild is a GTM engineering agency founded by Mateusz Sekta. It builds outbound campaigns and runs the CRM data layer underneath, so leads land scored and segmented.
Their Clay credential is the strongest I found for this list. They finished as Clay Cup Vice Champions, ranked second globally and first in Europe for GTM engineering.
The work splits into volume, micro and signal-based outbound campaigns on one side. CRM cleaning, enrichment and lead scoring sit on the other.
They launched 250+ outbound campaigns in 2025, and their 50+ revenue engines span markets from DACH to the US. The team is Europe-based, so ask how they cover Eastern time.
B2B Boosted describes itself as one of the first Clay-certified partners in the UK. It builds bespoke outbound systems with Clay at the heart of each one.
The model is built around independence. Everything is set up under accounts your company owns. Their stated goal is for you to fire them within three to six months.
There is no minimum commitment and no termination clause. The first Clay table is free, and a 30-day pilot costs £1,999. I like that the exit plan is built in from day one.
Every send gets human approval before it goes out. The scope runs from list building and Clay enrichment to copywriting and deliverability.
Growth Alliance builds revenue operations infrastructure, mainly for B2B companies between $5M and $50M ARR. Clay sits in a wider stack with Cargo, Swarm, HubSpot and Salesforce.
Engagements run as 90-day sprints with a 60-day rolling cancellation on retainers. They cap the roster at four to six clients at a time.
One testimonial on their profile credits them with 800+ leads in under two months and $200k+ in pipeline. Their site promises 16 hours of coverage across US and EU time zones every working day.
Programs start at $10K a month, with smaller demand and visibility work from $2.5K. I would pick them if you want both sides of the GTM engineering vs RevOps split.
FullFunnel is a GTM and RevOps services firm headquartered on North Washington Street in Boston. It has run since 2014 and holds Clay's Elite Studio tier.
Clay sits at the center of their signal work. They use it to enrich inbound leads instantly, trigger outreach on intent and feed outbound, inbound and ABM campaigns.
The homepage cites 1,000+ B2B organizations served. On Clay's directory, a portfolio marketing lead at IQVIA says the team is thriving in a tough environment.
Clay's directory lists pricing from $5k+ a month with a one-month minimum. I find that a light commitment for an Elite Studio partner.
demandDrive is a GTM agency headquartered in Waltham, just outside Boston. It holds Clay Studio status and pairs Clay builds with sales and marketing execution.
Their background is running sales campaigns across B2B SaaS, cybersecurity, healthcare and manufacturing. That sales history shapes how they set Clay up around a real team.
They publish solid Clay material, including a guide to account prioritization and buyer committee mapping. They have also advertised in-house GTM engineer roles this year.
Pricing starts at $5k+ a month with a one-month minimum. I would shortlist them if you want Clay and SDR support from one local vendor.
OpsLiftOff is a Boston RevOps consultancy with Clay's Advanced Artisan tier. It provides fractional RevOps support to scaling startups.
Their core strength is system architecture across Salesforce and HubSpot. Clay plugs into that work for inbound lead enrichment, ABM and CRM enrichment.
The homepage leans on Salesforce administration and sales operations rather than Clay. So I would ask for Clay examples on the first call.
Clay's directory lists them as open to any budget with a one-month minimum. That makes them one of the easier local teams to trial.
The Kiln is an Elite Studio Clay partner built by automation experts, data scientists and early Clay employees. That insider familiarity is their main selling point.
They design inbound, outbound and RevOps systems that often center on Clay. Named clients include Windsurf, Browserbase, Loxo and Sendoso.
Their homepage now announces that The Kiln has been acquired by 2X. I would ask how that changes team structure and pricing before signing.
Expect $10k+ a month and a three-month minimum. Clay lists them as a US partner without naming a city.
Skydog Ops is a New York RevOps firm with Clay Studio status. Its site shows 150+ G2 reviews, and it describes itself as G2's top Salesforce firm.
They connect Clay to your CRM, signals and outbound motion. The build covers signal ingestion, enrichment, ICP scoring and sequences wired into Salesforce or HubSpot.
The team embeds in your Slack and standups like an internal hire. Their client base leans toward private capital firms and B2B tech.
Expect $10k+ a month with a three-month minimum. I would look at them first if Salesforce is your system of record.
Workflows.io is a New York growth studio that sells GTM engineering as a service. It holds Clay's Advanced Artisan tier.
They say they have worked with 200+ companies and tested 250+ AI sales tools. Named clients include Cluely, Landbase, Cargo and Proton.
Their scope is wider than Clay alone. It spans AI RevOps, outbound, LinkedIn content engines and a six-month ABM sprint.
Pricing starts at $5k+ a month with a three-month minimum. I see them as a fit when you want outbound and LinkedIn content under one roof.
Terra Firma is a New York Clay Artisan partner focused on Seed to Series A startups. They build GTM systems for the stretch when you raise and start scaling sales.
Custom Claygent enrichments are central to their approach. They mine buying signals like hiring patterns, app reviews and 10-K filings.
Outbound runs as weekly experiments across Instantly, Lemlist, HeyReach and Outreach. I like that every workflow is documented, so nothing sits in a black box.
They have worked with startups backed by Felicis, Y Combinator, CRV and Greycroft. Expect $10k+ a month with a three-month minimum.
Some Boston teams do not need an agency at all. If you already run Clay in-house, Salesforge handles the sending side across email and LinkedIn.
The Salesforge Clay integration connects enriched tables to your sequences. Here is what the rest of the platform adds.
Watch how Salesforge and Clay work together when you run outbound yourself.
All the agencies on this list can run effective Clay builds on your behalf. But if your goal is to own the process, control the data and scale without growing headcount, Salesforge gives you the infrastructure to do it. Try the 14-day free trial - no credit card required.
| Agency | Location | Best For | Key Focus |
|---|---|---|---|
| Vanderbuild ✓ Forge Certified | Europe (Remote) | Clay-Built Revenue Engines | GTM engineering, CRM data |
| B2B Boosted ✓ Forge Certified | UK (Remote) | Owning Your Clay System | Clay builds, full handover |
| Growth Alliance ✓ Forge Certified | US & EU (Remote) | Clay-Led RevOps At Scale | CRM enrichment, data orchestration |
| FullFunnel | Boston, MA | Clay Inside Managed RevOps | Signal-driven GTM, RevOps |
| demandDrive | Waltham, MA | Clay Plus SDR Execution | Clay builds, sales services |
| OpsLiftOff | Boston, MA | Clay With Salesforce And HubSpot | Fractional RevOps, CRM enrichment |
| The Kiln | US (Remote) | Complex Custom Clay Builds | Custom Clay GTM systems |
| Skydog Ops | New York, NY | Clay-To-CRM Sync | Clay and CRM systems |
| Workflows.io | New York, NY | AI-First GTM Experiments | GTM engineering as a service |
| Terra Firma | New York, NY | Seed To Series A Startups | Startup GTM systems |
If you want a Clay partner you can meet in person, start with FullFunnel, demandDrive or OpsLiftOff. All three are based in Greater Boston and hold verified Clay partner tiers.
If Clay depth matters more than a Boston address, shortlist the Forge Experts first. Vanderbuild, B2B Boosted and Growth Alliance all build Clay systems for US teams.
And if you would rather own the whole motion, pair your own Clay tables with Salesforge and run outbound yourself.
Fourteen days is enough to test it.
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