Clay has become the workbench for modern outbound. It pulls company and contact data from many providers, lets AI agents research accounts, and pushes the results into a CRM or a sequencer. Getting real pipeline out of it is harder than the demos suggest, which is why a new kind of firm has appeared: the Clay agency, or GTM engineering agency. These teams build enrichment waterfalls, signal-based account scoring, AI research prompts and outbound workflows, then either hand them over or run them for you.
This list is for founders, heads of growth, sales leaders and RevOps managers deciding whether to hire outside help with Clay in 2027. Some agencies on it are pure GTM engineering shops that build systems for your team to run. Others run the whole outbound program, from list building to booked meetings. A few combine Clay with CRM work in HubSpot or Salesforce. If you want a fully managed sending program without the systems work, our list of cold email agencies may be a better starting point.
How we chose: we started with Clay’s own Solutions Partner Directory, which ranks partners in tiers (Elite Studio at the top, then Studio and Advanced Artisan). When we checked, the directory listed six Elite Studio partners, and all six are on this list. We then confirmed on each agency’s website that it builds Clay workflows, and checked its services, location, named clients and published results. Every figure below comes from the agency’s site or its Clay directory profile. Where a firm does not publish a number, we left it out.
No agency paid to be included. Rankings weigh Clay partner tier, depth of GTM engineering work, evidence of results and how clearly each firm explains what it delivers.
Clay And GTM Engineering Agencies At A Glance
Company
Headquarters
Clay Partner Tier
Best For
Core Services
Growth Engine X
United States
Elite Studio
High-volume cold email
List building, Claygent enrichment, email infrastructure
Best Clay And GTM Engineering Agencies To Hire In 2027
1. Growth Engine X — Elite Studio Partner Founded By A Former Clay Employee
Growth Engine X is a B2B lead generation agency founded by Eric Nowoslawski, whom Clay’s directory describes as a long-time Clay expert and former Clay employee. It holds Clay’s Elite Studio tier, and a Clay engineer quoted on its site says Eric’s workspace is consistently Clay’s most used and that he is the company’s largest user.
The model is high-volume, well-targeted cold email. The agency handles email infrastructure (including backup domains kept warming in reserve), list building with enrichment and validation through Claygent and Prospeo, campaign strategy with 15 to 20 campaign ideas at the start, and CRM sync through OutboundSync. Its site reports 8M+ emails sent per month and 62,000+ positive responses in 2025.
Clients named on the site include Clay itself (with a reported 4:1 ROI), Notion, Instantly and Numeral, along with smaller service businesses. Growth Engine X targets companies with $1M+ in revenue and customer lifetime value above $5,000, and Clay’s directory lists a three-month minimum engagement. It offers a free test campaign to qualifying businesses, which lowers the risk of trying it.
Best for: B2B companies with a clear ICP and healthy deal sizes that want Clay-powered cold email run at scale by a team that knows Clay unusually well.
2. The Kiln — Elite Studio Partner Started By Early Clay Employees
The Kiln is a Brooklyn-based GTM engineering agency co-founded by Patrick Spychalski and Mathias Powell, and its team includes early and former Clay employees. Clay co-founder Varun Anand appears in a testimonial on its site. In January 2026, marketing services company 2X announced it had acquired The Kiln, and The Kiln continues to operate under its own name and holds Clay’s Elite Studio tier.
Its work spans sales (automated outbound, lead qualification, AI research automation, LinkedIn outreach), marketing (inbound lead enrichment, account scoring, paid ad audiences) and RevOps (CRM cleaning, enrichment, normalization and lead scoring), plus custom GTM engineering for unusual projects. The site says the firm takes on only a few clients at a time.
Named clients and testimonials include Kleiner Perkins, Browserbase, Antimetal, Sendoso, NewStore and Azuga. The Azuga case study headline cites 640+ hours of manual work per week, and one testimonial credits The Kiln with speeding up a Clay implementation by several months.
Best for: Venture-backed and enterprise teams that want bespoke Clay systems designed by people who helped shape how Clay is used.
3. Frontal AI — Elite Studio Partner Formerly Known As ColdIQ Agency
Frontal AI is the agency formerly known as ColdIQ Agency. Its FAQ says ColdIQ Agency became Frontal in 2026 with the same operators, led by founder and CEO Alex Vacca. It holds Clay’s Elite Studio tier and runs outbound, paid ads and content as one system built in Clay and synced to the client’s CRM.
Engagements usually start with a 90-day foundation covering ICP modeling, tiered TAM mapping, signal-based account scoring and decision-maker enrichment. From there it adds signal-driven outbound, ad audiences synced from Clay to LinkedIn and Google, and founder and employee content routed into outbound. Clay’s directory lists pricing from $5,000 per month with a three-month minimum, in English and French.
Frontal publishes specific results. AirOps generated $7.83M in qualified pipeline and $1.52M in closed-won revenue over ten months, Aircall enriched 3,655 accounts into a single TAM, and Design Pickle went from about ten demos a week to 58 in 14 days. Frontal says it has worked with 300+ companies.
Best for: B2B companies past product-market fit that want outbound, ABM ads and content run from one Clay-based data layer.
4. RevPartners — Elite Clay Studio And Elite HubSpot Partner
RevPartners, founded in 2020 and based in Atlanta, holds Elite tiers with both Clay and HubSpot and describes itself as the only firm with both. That makes it the obvious shortlist pick for HubSpot customers who want Clay enrichment and outbound wired directly into their CRM.
Its Clay work, per its directory profile, includes implementing Clay as a GTM engine, cleaning and enriching CRM data, AI-assisted prospecting and signal-based outbound. Those services sit inside a broader RevOps-as-a-service and GTM-engineering-as-a-service offer that also covers HubSpot implementations, migrations, integrations and AI agents.
RevPartners reports 1,000+ CRM and RevOps deployments and 540+ five-star HubSpot reviews, with client logos including Eventbrite, Zoom and Rackspace Technology. Clay’s directory lists a three-month minimum and English and Spanish support. We also rank it in our HubSpot partner agencies list.
Best for: HubSpot-based B2B teams that want one partner for CRM operations and Clay workflows on an ongoing subscription.
5. Go Nimbly — Elite Studio RevOps Consultancy With Enrichment Across 75+ Providers
Go Nimbly is a San Francisco-headquartered RevOps consultancy founded in 2013. Clay’s directory lists it as an Elite Studio partner with a team of about 80 operators and technologists, focused on mid-market, enterprise and post-IPO companies.
Its Clay services page is one of the most detailed we found. It covers CRM hygiene and continuous enrichment, waterfall enrichment across 75+ providers (which it says delivers 90%+ coverage), AI account and contact research, human-in-the-loop outbound, PLG-to-sales handoff, intent signal orchestration, and territory planning and account scoring. Packages run from a roughly three-month Foundations build to six-month-plus enterprise programs, each with a 30-day hypercare period after launch.
Go Nimbly also offers Gong services and broader RevOps work in lead-to-opportunity, account hierarchy and quote-to-cash. Logos on its site include Intercom, Rippling, Zendesk, Twilio and Plaid. Clay’s directory lists pricing from $10,000 per month, which puts it at the upper end of this list.
Best for: Mid-market and enterprise SaaS companies that need Clay built into a larger RevOps architecture, including product-led growth signals.
6. FullFunnel — Elite Studio Partner Running Managed Clay Data Engines
FullFunnel is a Boston-based B2B agency founded in 2013 that now positions itself as a managed support and applied AI partner. It holds Clay’s Elite Studio tier for 2026 and offers a Clay Data Engine program in Pro and Enterprise versions, plus Clay administration as part of its GTM operations service.
Its managed support covers GTM operations (strategy, engineering, audits, pilots and data operations), demand generation operations (outbound, ABM, paid advertising, SEO and GEO) and revenue operations, including HubSpot and Salesforce management. On the AI side it offers its own FullFunnel agents, n8n and HubSpot agent programs and an AI GTM readiness audit.
FullFunnel says it has served more than 1,000 B2B organizations, and testimonials on its site come from PartnerMD, Adhesion Wealth, Zumba and Willdan. Clay’s directory lists pricing from $5,000 per month with a one-month minimum, which makes it easier to test than firms that require a quarter up front.
Best for: B2B teams that want an outside group to operate and maintain their Clay tables month to month alongside CRM and marketing operations.
7. Workflows.io — Clay Studio Partner Rated 5.0 From 19 Directory Reviews
Workflows.io is a New York-based growth studio that sells GTM engineering as a service to fast-growing B2B tech companies. It is co-founded by Fivos Aresti and Dan Rosenthal, and it is a Clay Studio partner with a 5.0 rating from 19 reviews in Clay’s directory.
Services are sold as subscriptions or sprints: automated outbound built on Clay’s 120+ data providers, LinkedIn content, RevOps and ABM programs. Workflows says it has worked with 200+ companies and tested 250+ AI sales tools. Clay’s directory lists pricing from $5,000 per month with a three-month minimum.
Client logos include HeyReach, Cargo, Landbase, Cluely and Proton. Its Freckle case study reports 42% month-over-month growth over six months and 640+ Tier 1 sign-ups from outbound. The pairing of LinkedIn content with outbound is useful for founder-led companies where the founder’s profile is a channel in its own right.
Best for: Seed to growth-stage tech startups that want outbound and founder-led LinkedIn content built and run together.
8. demandDrive — Clay Studio Partner Combining GTM Engineering With Outsourced SDRs
demandDrive is a Boston-based sales development and growth firm with more than 15 years of programs. It is a Clay Studio partner, and a 2026 post on its site says Clay named it the inaugural “Rising Star” partner. Its Clay services cover implementation, automation and ongoing management.
What makes demandDrive different is that it also supplies people. Alongside Clay builds for GTM architecture, account prioritization, data enrichment and buying committee mapping, it runs outsourced SDR and BDR programs, appointment setting, demand generation and ABM. That lets one partner both build the data system and staff the reps who use it.
Published results include $16M in pipeline for Medrio, $136M in opportunities driven for Qorvo and a 70% reduction in cost per qualified lead for The Lee Company. Clay’s directory lists pricing from $5,000 per month. Compare it with other firms on our list of outsourced SDR companies if headcount is your main need.
Best for: Companies that want Clay-driven targeting and the outsourced SDRs to work it, under one contract.
LeanScale is a remote team of former B2B startup operators that acts as an embedded GTM operations team for venture-backed companies. It is a Clay Studio partner, and its FAQ confirms it works with enrichment tools such as Clay and ZoomInfo alongside HubSpot and Salesforce.
Rather than a one-off build, LeanScale assigns a dedicated pod on a 90-day rolling subscription, with project cycles of four to twelve weeks. Its service lines cover CRM administration and implementation, AI systems and workflows, tool integration, GTM reporting and dashboards, process design and documentation, and ad hoc GTM support with a same-day response target. It organizes the work into growth, marketing, revenue and financial operations practices.
Clients named on its site include Mistral AI, Chainguard, AssemblyAI, Clio and Anrok, and it reports a 4.9 out of 5 rating on G2. Clay is one part of LeanScale’s work rather than the center of it, so it ranks below more Clay-focused firms.
Best for: Seed to Series C startups that want a fractional GTM ops team covering Clay, CRM and reporting without hiring in-house.
10. Scalantec — Berlin GTM Engineering Agency For The DACH Region
Scalantec is a Berlin-based GTM engineering agency focused on Germany, Austria and Switzerland. It is listed as an Advanced Artisan in Clay’s directory, its site displays a Clay Partner of the Year 2026 badge, and it specializes in outbound sales, CRM enrichment and RevOps for DACH companies.
Its outbound service is done for you across email, LinkedIn and cold calling, including copywriting, deliverability work and meeting booking. On the RevOps side it handles CRM cleanup, enrichment, automation, inbound lead qualification and Clay integration with CRM and GTM stacks. It also offers Clay enablement and training with tailored setups, SOPs and ongoing support, which suits teams that want to own their Clay workspace.
Scalantec publishes less evidence than firms higher on this list. Its directory profile has no reviews yet, and its main testimonial comes from Impossible Cloud’s VP of Sales, who reports a significant six-figure ARR pipeline in the first month. The one-month minimum makes it easy to trial.
Best for: Companies selling into the DACH market that want a Clay partner based in the region.
How To Choose A Clay Agency
Do You Want A System Built Or A Program Run?
This is the first decision. Some Clay agencies build workflows, document them and train your team to run them. Others operate the program end to end and report on meetings booked. If you have RevOps staff who can maintain Clay tables, a build-and-hand-over engagement costs less over time. If you do not, a managed program avoids a system that quietly breaks after the agency leaves.
What Does The Clay Partner Tier Tell You?
Clay’s partner tiers reflect how much work a partner does on the platform and its standing with Clay. An Elite Studio partner has a track record and direct access to Clay’s team. A Studio or Artisan partner may be smaller but more specialized, by region or use case. Use the tier as a starting filter, then judge each firm on case studies that resemble your motion.
How Will They Connect Clay To Your CRM?
Enrichment is only useful if it lands in the right fields and triggers the right routing. Ask exactly which objects and fields the agency will write to, how it avoids overwriting good data, and how duplicates are handled. Firms with HubSpot or Salesforce depth, such as RevPartners or Go Nimbly, tend to be stronger here. Our guide to RevOps consulting firms covers the CRM side in more depth.
Who Pays For Clay Credits And Data Providers?
Clay runs on credits, and many workflows also call paid data providers. Clarify whether the agency works in your Clay workspace or its own, who pays for credits, and what monthly usage to expect. Ask for a credit budget per thousand enriched accounts so costs do not surprise you. For a view of the underlying data sources, see our list of B2B data and intent data providers.
How Do They Protect Deliverability?
Better targeting does not help if emails land in spam. Ask how the agency sets up sending domains and inboxes, how it warms them, what daily volume it sends per inbox and how it monitors bounce and spam rates. If the answers are vague, pair the agency with a specialist from our list of cold email deliverability agencies.
Frequently Asked Questions
What Is A Clay Agency?
A Clay agency is a firm that builds and often runs go-to-market workflows in Clay, the data enrichment and automation platform. Typical work includes building target account lists, enriching contacts through waterfalls of data providers, using AI to research accounts, scoring accounts on buying signals and pushing results into a CRM or outbound sequencer. Clay maintains a public directory of certified Solutions Partners.
What Is A GTM Engineering Agency?
A GTM engineering agency applies engineering methods to sales and marketing: it builds automated systems for finding, enriching, scoring and contacting prospects rather than relying on manual list work. Clay is the most common tool in these stacks, but GTM engineers also use CRMs, sequencers, n8n and AI models. The term overlaps with RevOps, with more emphasis on building pipeline-generating workflows. Our 2025 roundup of GTM and RevOps transformation firms covers the strategy side.
How Much Does A Clay Agency Cost?
Based on Clay’s directory, many partners on this list start at about $5,000 per month, and Go Nimbly lists $10,000 per month. Minimum engagements range from one to three months. Clay credits and data provider costs are usually separate, so budget for both.
Should I Hire A GTM Engineer Instead Of An Agency?
An in-house GTM engineer makes sense once outbound is a core, ongoing channel and you have enough work to keep one person busy. An agency is faster to start, brings patterns from many clients and is easier to stop. A common route is to hire an agency to build the first version and train the internal hire who will take it over.
Conclusion
The six Elite Studio partners, Growth Engine X, The Kiln, Frontal AI, RevPartners, Go Nimbly and FullFunnel, are the safest starting points for a Clay agency in 2027, each with a different emphasis from high-volume email to enterprise RevOps. Workflows.io, demandDrive, LeanScale and Scalantec fill specific needs: founder-led content, outsourced SDRs, embedded startup ops and the DACH market.
Decide first whether you want a system built or a program run, then shortlist two or three firms whose case studies look like your motion. Ask about CRM integration, credit costs and deliverability before signing, and make sure you will own the Clay workspace and documentation at the end.
