Clay agencies in Europe have multiplied as GTM engineering turned into a real job title. I went through Clay's own partner directory to find the European teams with real results behind their builds.
Europe adds its own layer of difficulty. You are selling across languages, time zones and privacy rules that vary from one border to the next.
I judged these ten on Clay depth, data ownership and how honestly they report pipeline. Three are certified Forge Experts and hold the top slots.
For wider context I also keep breakdowns of European cold email agencies and lead generation agencies in Sydney.
Vanderbuild calls itself a GTM engineering agency, and its Clay record backs that up. The team finished as Clay Cup Vice Champions, ranked second globally and first in Europe.
The work splits into two halves. Outbound covers volume campaigns, micro campaigns and signal-based plays. CRM automation then cleans and enriches the data underneath so leads arrive scored and segmented.
The team launched 250+ outbound campaigns in 2025 and has built 50+ revenue engines so far. That footprint covers DACH and CEE, plus Benelux, the Nordics and the UK.
What I liked most is that every system runs inside the client's own accounts. If you are still weighing an agency against hiring a GTM engineer, this is a useful benchmark. The listed working languages are English and Polish, so ask how native copy gets written for other markets.
B2B Boosted puts Clay at the heart of its outbound systems. What caught my eye is the goal: clients should be able to fire the agency within three to six months.
Everything is set up under accounts the client owns. The tables, prompts and workflows stay behind if you leave, and there is no minimum commitment or termination clause.
The first Clay table is built free, which is a low-risk way to judge quality before paying. After that, a 30-day pilot costs £1,999 or a three-month sprint runs at £1,749 a month.
Every email goes out only after human approval, which matters if your domain reputation is fragile. Pair that with good cold email deliverability habits and the risk stays low. Listed languages skip German and French, so DACH or French campaigns may need extra copy support.
Strongest Group runs Clay-powered outbound workflows built on buying signals rather than static lists. Its site claims 1,200+ meetings booked monthly and 250+ clients across 15 countries.
The pricing model is the standout for me. Clients pay per realised meeting, so the agency carries more of the risk than a flat retainer would. I would agree in writing what counts as a qualified meeting before signing.
Cold email, LinkedIn, cold calling and retargeting all run as one motion. The team also runs localised cold calling in languages including Finnish, Swedish, Spanish and Polish.
Beyond outbound, the team helps with GTM strategy, RevOps infrastructure and sales enablement. If per-meeting pricing appeals, weigh it against the AI SDR vs agency trade-off too.
GTM Studios bills itself as the UK's first GTM engineering agency and holds a Clay First 100 partner badge. The homepage promises infrastructure delivered in 30 days and fully owned by the client.
The core products are TAM mapping, trigger-based sales signals and CRM clean-up. Sequencing then gets wired into tools like lemlist, Instantly and HeyReach.
The client list spans SaaS, broadband and legal, including Hyperoptic and the law firm Harper James. One customer credits the Clay engine with 550+ qualified leads in a single year.
Engagements start at three months. I would pick it for a proper build rather than a quick test.
Saleslift Studio is an official Clay partner working in English, Dutch and German. The team pairs Clay builds with hands-on outbound, RevOps and account-based marketing.
The FedEx Europe programme is the case study I kept coming back to. It targeted e-commerce companies in six countries and produced 243 qualified meetings in six months.
Other clients include Eneco, Freshworks and TOPdesk. Saleslift also runs Clay sessions for in-house teams, which a Just Eat Takeaway.com RevOps director publicly recommended.
The minimum engagement is three months. Smaller startups may find the enterprise focus more than they need.
Scalantec is a Berlin-based GTM engineering agency focused on the DACH region. It covers done-for-you outbound across email, LinkedIn and cold calling.
The second service line is RevOps and CRM intelligence. That means clean-up, data enrichment and always-current inbound lead qualification, all synced back to your CRM.
Scalantec also trains teams on Clay with SOPs and templates, so the knowledge stays in house. One VP Sales credits the team with six-figure ARR pipeline in the first month.
I like that engagements start at one month, which makes a trial run easier to justify. Languages include German, French, Italian and Spanish.
Peakora presents itself as the first Clay Enterprise partner in Europe and holds HubSpot Gold status. The team is based in Baar, Switzerland. It works in English, German and French.
The approach starts with GTM design before any engineering begins. Targeting, messaging, CRM and automation get planned as one system rather than separate projects.
Peakora says it has supported 200+ companies so far. Its public playbooks cover SDR agents that trigger on job postings, new hires and fresh funding rounds.
I would shortlist Peakora for a bigger rebuild, given the three-month minimum and design-first process. Teams wanting a quick campaign may find it heavier than needed.
One Thousand Pieces is a French Clay studio partner that describes its work as building growth puzzles for B2B scaleups. The client list includes Orb, nTop, FlutterFlow and Caresyntax.
I found the case studies unusually detailed. For Orb, the team built a Clay scoring system that compresses five fit and intent signals into one 1-10 score.
Another client saw its TAM grow from about 2,000 to 20,000+ accounts in six months. That came from an AI qualifier plus Clay enrichment on 10,000+ records a month.
The team also holds certifications for Smartlead, HeyReach, Dust and n8n. The one-month minimum makes it easy to start small.
Enablement works as a fractional GTM engineering team for B2B tech companies above $1M ARR. Its pitch is simple: more pipeline with fewer BDRs.
The model blends inbound and outbound into what the team calls an AI-Allbound motion. So far that has meant 52 Clay implementations and 85+ HubSpot instances.
One fintech CRO says 71% of their deals came from outreach built with Enablement. The case studies also include Trawa, an ecotech startup that raised a €24m Series A.
Pricing starts around $5k a month with a three-month minimum. In my view that puts it out of reach for very early-stage teams.
LeadFabric has been around since 2008, long before Clay existed. It runs brand, demand generation and ABM as one programme for midsized and enterprise B2B.
Clay is one tool inside a wider consulting, technology and execution offer. The team works across offices in Brussels, London and Bucharest.
The typical client is a European-headquartered firm or the EMEA arm of a North American enterprise. Technology, financial services and manufacturing are the core sectors.
Budgets start around $10k a month with a three-month minimum. I find that steep for a pure Clay build but fair for a full ABM programme.
Every agency above can build Clay workflows for you. The alternative is running the outbound side yourself and keeping the data, the domains and the learning in house.
That is what Salesforge is built for. Its direct Clay integration pushes enriched leads straight into sequences, so your tables and your sending stay in one loop.
A Salesforge video on how GTM engineers automate outbound, the same work these Clay agencies sell.
All the agencies on this list can run effective Clay-powered outbound 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.
Or if you're still evaluating agency options, take a look at the certified Forge Experts for vetted agency partners.
| Agency | Location | Best For | Key Focus |
|---|---|---|---|
| Vanderbuild✓ Forge Certified | Serves CEE and DACH | GTM engineering across CEE and DACH | Outbound plus CRM orchestration |
| B2B Boosted✓ Forge Certified | Serves UK and EU | Owned Clay systems without lock-in | Client-owned builds, human approval |
| Strongest Group✓ Forge Certified | Serves EU and DACH | Pay-per-meeting multi-market outbound | Multilingual calling, signals |
| GTM Studios | London | UK TAM mapping and signals | TAM scoring, CRM clean-up |
| Saleslift Studio | Netherlands | Pan-European account-based programmes | ABM, Clay training |
| Scalantec | Berlin | DACH outbound plus RevOps | CRM enrichment, Clay SOPs |
| Peakora | Baar, Switzerland | Clay and HubSpot builds in DACH | GTM design, HubSpot Gold |
| One Thousand Pieces | France | Account research and scoring | Custom scraping, TAM expansion |
| Enablement | Serves Europe | Combined inbound and outbound | Allbound, HubSpot |
| LeadFabric | Brussels, London, Bucharest | Enterprise ABM across EMEA | Brand, demand gen, ABM |
Clay agencies in Europe range from small studios to an ABM firm founded in 2008. Fit matters more than ranking. The three Forge Experts at the top each solve a different problem.
Vanderbuild suits teams that want Clay and CRM data engineered together. B2B Boosted suits founders who want to own everything. Strongest Group suits teams that prefer paying per meeting.
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