Clay agencies in the US now range from full RevOps firms to small GTM engineering studios. I built this top 10 by checking Clay partner tiers, published pricing and who owns the build afterward.
Clay's own Solutions Partner directory lists more than 130 partners worldwide. I narrowed that down to firms with verified Clay credentials and real work for US clients.
Three picks are certified Forge Experts based in Europe who run Clay systems for US teams. They take the top three slots. The other seven are US-based Clay Solutions Partners.
For a different market, I used the same approach to compare lead generation agencies in Sydney. There is also a section below on running Clay outbound in-house.
Vanderbuild is a GTM engineering agency founded by Mateusz Sekta. They finished as Clay Cup Vice Champions, ranked second globally and first in Europe.
The work splits into two parts. Outbound covers volume, micro and signal-based campaigns. CRM data automation cleans, enriches, scores and segments the records underneath.
In 2025 they launched 250+ outbound campaigns and built 50+ revenue engines, with the UK and US among their markets. One client reported a 55% LinkedIn reply rate while validating demand. Rates are not published, but pricing runs as a retainer, a project fee or pay per warm lead.
What stood out to me is ownership. Every system runs inside your own accounts, so the Clay tables stay with you afterward. They can feed any sequencer, including through the Salesforge Clay integration.
B2B Boosted builds bespoke outbound systems with Clay at the center. Their stated goal is unusual: they want clients to fire them within three to six months.
Everything is set up under accounts the client owns. Tables, prompts and workflows are documented and handed over. There are no minimum commitments or termination clauses.
Their specialisms cover list building, enrichment and triggers. AI prompting, deliverability and copywriting sit in the same build. They are tool agnostic, so n8n gets used when Clay is the wrong fit.
Pricing is public: a 30-day pilot costs £1,999, and a three-month sprint runs £1,749 a month. If you are still weighing the platform itself, my Clay review covers where it earns its cost.
Growth Alliance builds revenue operations infrastructure for B2B companies between $5M and $50M ARR. Three principals run the work, covering sixteen hours a day across US and EU time zones.
Clay sits alongside Cargo, Swarm, HubSpot and Salesforce in their stack. Data orchestration, CRM enrichment and multichannel outbound are scoped as one system.
Delivery follows a 90-day sprint with weekly strategy sessions. They cap capacity at four to six clients, at 100 to 120 hours each per month.
Programs start at $10k a month, while smaller demand work starts at $2.5k. Monthly retainers carry a 60-day rolling cancellation, which is flexible for this price band. Your own Clay seats and credits sit on top, so check Clay pricing before budgeting.
The Kiln's team mixes automation experts, data scientists and early Clay employees. That insider knowledge of the platform shows in how they scope builds.
They design AI-powered systems for inbound, outbound and RevOps, with Clay at the center of most. Services run from TAM mapping and deep enrichment to self-enriching CRM data.
Clients have included Windsurf, Browserbase, Loxo and Sendoso. The Kiln has since been acquired by 2X, so ask how that affects the team you would get before signing.
Expect $10k+ a month and a three-month minimum, which places them in the Series B and later bracket.
Growth Engine X was founded by Eric Nowoslawski, a long-time Clay expert and former Clay employee. Clay's co-founder has publicly called him one of the most respected agency owners in outbound.
The focus is cold email for B2B companies with more than $1M in revenue. Their homepage now cites 8M+ emails sent each month, and the site lives at coldoutbound.com.
Qualifying companies can get a free test campaign before committing. I like that, because it lets you judge copy and targeting on real prospects.
Past clients include Instantly, Notion and Clay itself. Their Clay listing targets B2B companies whose customers carry an LTV above $5k, with a three-month minimum.
RevPartners describes itself as the only Elite Clay Studio that is also an Elite HubSpot Partner. It now operates as a Walker Sands company.
The pitch is RevOps and GTM engineering for businesses on HubSpot and Clay. Their RevOps practice makes the CRM the source of truth, while an Allbound motion runs Clay-powered outbound.
HubSpot migrations, go-to-market rework and advanced Clay outbound can sit in one engagement. Budgets are flexible on their Clay listing, though you commit to three months.
demandDrive is a Boston-based Clay Studio partner that pairs Clay builds with sales execution. They also run sales development outsourcing, so trained SDRs can work the lists they build.
Clay use cases include implementation, GTM architecture and account prioritization. They also map buyer committees and fill gaps in incomplete CRM records.
Clay's Head of GTM Partnerships credits them for focusing on what moves pipeline rather than flashy workflows. Monthly fees start around $5k, and you can test them with a one-month commitment.
Workflows.io calls itself an AI-first growth studio that delivers GTM engineering as a service. The team says it has worked with 200+ companies and tested 250+ AI sales tools.
Four service lines run side by side: AI RevOps, outbound, LinkedIn content and a six-month ABM sprint. The content arm is unusual among the Clay partners I reviewed and has driven 10M+ organic LinkedIn impressions.
Clients include Cluely, Landbase and Cargo. Retainers begin at $5k+ monthly over a three-month minimum.
Understory runs an allbound model where paid media, GTM engineering and LinkedIn content work as one system. Clay acts as the central hub for enrichment across every channel.
They build trigger-based outbound, website-visit automations and paid campaigns synced to the same ICP. The company ranked No. 140 on the Inc. 5000 list of fastest-growing US companies.
The trade-off is commitment, since their Clay listing shows a six-month minimum. That is the longest published minimum on this list.
Redline Growth sells account intelligence built on Clay rather than booked meetings. The deliverable is the right account, contact and content for your reps to act on.
Work runs as fixed-scope projects or an ongoing subscription. Projects use three modes: Detect for list building, Translate for cross-sell analysis, and Advisory for assessment sprints.
The team brings 30+ years across investment banking, Big 4 consulting and quota-carrying sales. Rates start at $5k+ a month, and the minimum term is a single month.
Clay is excellent at building lists and adding context. It still needs something on the other end to send, follow up and handle replies.
The Forge stack covers that side without a monthly agency retainer. Clay rows can flow straight into Salesforge sequences through the Clay integration.
The Clay workflows worth building before you push the results into Salesforge sequences.
All the agencies on this list can run effective Clay campaigns 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, serves US | Clay-Built Outbound And CRM Automation | GTM Engineering, CRM Automation |
| B2B Boosted ✓ Forge Certified | UK, serves US | Owning Your Clay Systems | Clay Builds, Signal Targeting |
| Growth Alliance ✓ Forge Certified | Prague, Czechia | Mid-Market Clay RevOps | Data Orchestration, CRM Enrichment |
| The Kiln | United States | AI-Powered GTM Engineering | GTM Systems, Deep Enrichment |
| Growth Engine X | United States | High-Volume Clay Cold Email | Cold Email, Lead Sourcing |
| RevPartners | United States | HubSpot And Clay Teams | RevOps, HubSpot, Allbound |
| demandDrive | Boston, MA | Clay Plus Outsourced SDRs | Clay Implementation, SDR Programs |
| Workflows.io | New York, NY | GTM Engineering As A Service | AI RevOps, Outbound, Content |
| Understory | United States | Allbound Clay And Paid Media | Allbound, Paid Media, Clay |
| Redline Growth | Chicago, IL | Clay-Built Account Intelligence | Account Intelligence, Enrichment |
US Clay agencies cover everything from RevOps consultancies to specialists who hand over the keys. Picking well starts with deciding whether you want a build or an ongoing operator.
Vanderbuild is my top pick for engineering depth, with B2B Boosted and Growth Alliance also certified. For volume cold email try Growth Engine X, for HubSpot shops RevPartners, and for allbound Understory.
Rather own the sending side? Connect your Clay tables to Salesforge and run outreach yourself. Two weeks of warmup and two weeks of sending will tell you most of what you need.
Two weeks is enough to see the difference.
Start your free trial.jpg)
.jpg)
.jpg)
