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Clay Cup 2025🇬🇧 #1|🌍 Top 4 ClayCertified Specialists HubSpotSolutions Provider
Comparison · 2026

The best Clay agencies in the UK.

An honest guide for UK companies choosing a Clay partner: who's strongest at what, where they're based, and the one question that actually decides it. Do you want the work run for you, or an engine you own?

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UK Clay Agency Shortlist2026
01
Engineered GTMOwned revenue engine, proven on your data#1 UK Clay Cup
UK
02
Spring DrivePositioning-led outbound architecture
UK
03
GTM StudiosSignal-based outbound, fast setup
UK / Dubai
04
RevPartnersHubSpot + Clay at scale (Elite both)
US
05
ColdIQOutbound systems + free-tools library
EU
8 agencies reviewedScroll for the full breakdown
01 / The shortlist

Strong Clay partners, and who each is for.

Engineered GTMAn owned revenue engine on your own data, proven before you payUKUK/EU and PE-backed teams that want to own the engine
Jake Gill and Jess Rose, London. Owned revenue engines — pipeline and forecasting systems engineered on your first-party data, owned by you forever. Three phases: Architect / Engineer / Operate from £25k. Clients include Casap (full TAM enriched), Orchestra (7 revenue-grade workflows), and Wise.
#1 UK Clay CupClay CertifiedHubSpot PartnerOwned engine model
Spring DrivePositioning-led outbound architecture and messagingUKTeams who want sharp outbound campaigns run for them
London-based agency founded by Mohan Muthoo in 2023, and the 4th official Clay Expert in the UK. Their differentiator is starting with messaging strategy ("resonance-led") before layering automation — they argue most agencies do it backwards. Strong case study portfolio including Blinkist (309+ leads, $7.9M pipeline in 5 months). Also holds Smartlead and Instantly Expert badges. Starts with a 90-day pilot, then monthly retainer. Solo founder operation, likely with contractors.
Clay ExpertSmartlead ExpertInstantly ExpertFounded 2023
GTM StudiosSignal-based outbound infrastructure, fast setupUK / DubaiSmaller teams wanting a quick, lower-cost pipeline build
Founded by ex-SaaS sales leaders who adopted Clay early. They monitor 20+ buying signals (funding, hiring, tech installs, champion moves) and claim a 30-day average time to first pipeline. Full client ownership — you keep all domains, workflows, data, and dashboards. Clay Advanced Artisan partner. Pricing starts at $4,500/mo (Starter) to $6,500/mo (Growth), 3-month minimum. Claim to support over $2.4B in SaaS and technology businesses.
Clay Advanced ArtisanFrom $4,500/mo30-day launch
RevPartnersHubSpot + Clay implementation at scale (Elite both)USLarger teams already deep in HubSpot wanting a big implementer
Atlanta-based, ~70 employees across 12 countries. The only firm globally holding both HubSpot Elite and Clay Elite partner status simultaneously — and the fastest HubSpot partner in history to reach Elite tier. Acquired by Walker Sands (integrated B2B growth agency, 250+ people) in June 2026. RevOps-as-a-service retainers from $9,850/mo (Bronze) to $27,000/mo (Diamond). Clay implementations from $25,000 one-time. Strong on operational execution; third-party reviews note limitations on senior strategic architecture.
HubSpot EliteClay Elite~70 peopleAcquired by Walker Sands
FullFunnelFull-service RevOps and GTM staffingUSCompanies wanting a broad outsourced RevOps team
Boston-based, ~28 employees across 5 countries, founded 2014. They span demand generation, pipeline management, sales ops, marketing ops, and CS operations. HubSpot Diamond Partner (one tier below Elite). Also a Clay Solutions Partner ($5k+/mo). Their model is embedded teams — fractional or outsourced RevOps capacity at scale. Named clients include Airbnb. Noted strength is breadth across the full funnel; noted limitation is headcount contraction (~19% YoY) which may signal transition.
HubSpot DiamondClay Partner~28 peopleFounded 2014
ColdIQOutbound systems plus a large free-tools libraryEUOutbound-led teams comfortable with a campaign engine
Founded by Michel Lieben (Belgium/Barcelona), 30+ employees, scaled to $6.5M+ ARR bootstrapped. One of only 4 Clay Elite Studio Partners globally and #1 on Clay's creator leaderboard. They combine cold email, LinkedIn ads, LinkedIn content, and sales system builds into a "GTM Flywheel." 10,000+ meetings booked across 300+ B2B companies including 3 unicorns. Named clients include Aircall and Teikametrics. Retainers from $5k+/mo, 3-month minimum.
Clay Elite (1 of 4)$6.5M+ ARR30+ peopleBootstrapped
SculptedCRM enrichment and data hygiene in ClayUSTeams whose single biggest pain is dirty CRM data
Founded by Jacob Tuwiner (NYC), originally an outbound Clay agency that deliberately pivoted to CRM enrichment only in mid-2024. They do not do outbound — their entire offering is cleaning, enriching, and maintaining CRM data via Clay. Among Clay's first 100 experts. Small team (~3 people). Fixed-price 4-week sprints. Named clients include Sendoso ($1M+ pipeline), ConnectWise ($11M pipeline attributed), and Nooks. 95%+ enrichment accuracy claimed. Also teaches a Maven course on Clay for CRM enrichment (614 students).
Clay Solutions PartnerCRM-only (no outbound)Fixed-price sprints
Growth Engine XHigh-volume cold email at scaleUSTeams that want maximum send volume, fast
NYC-based, founded by Eric Nowoslawski (ex-Clay employee, was Clay's first marketing contractor). ~14 employees. Clay Elite Studio Partner and Clay's largest user by enrichment volume. Sends 8M+ emails/month across clients with 7,700+ managed inboxes, claiming 62K+ positive responses in 2025. They maintain backup domains at 150% capacity for instant swap on deliverability issues. Named clients include Forbes, Y Combinator, Notion, ChurnZero. Free test campaign offer for qualified prospects. Minimum: $1M+ revenue, $5K+ customer LTV.
Clay Elite8M+ emails/moEx-Clay employeeFree test campaign

Honest note: the US studios above carry real scale, brand and Clay/HubSpot Elite certifications. We're a two-person UK firm. Where we win is the model, not the headcount: you own the engine, and we prove it on your data before you pay.

Most Clay agencies are excellent at one of two things: running campaigns and outbound for you, or configuring Clay and handing back lists. Both leave the capability with the agency. The harder, rarer thing is engineering Clay into an owned revenue machine on your own data that keeps running when the engagement ends. That distinction matters more than any certification once you're spending real money, so it's the lens this guide uses.

If you want to own it

The one question that decides it.

Open notebook comparing most agencies (everything walks out with them) vs Engineered GTM (yours outright)

When the engagement ends, who has the capability? With most agencies the answer is them: the tables, the logic and the know-how leave when they do. With us, you own the engine outright, the Clay workflows, the enrichment logic, the scoring model and the runbook, built on your own first-party data so a competitor can't copy it.

And you see it before you commit. We hand you a blueprint of where your pipeline leaks before any contract, and you never pay for a build phase until its spec is met and verified. That's the model US scale can't easily match from another time zone.

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#1UK · Clay Cup 2025
~3×pipeline velocity · Casap
~94%forecast accuracy · Orchestra
100%owned by you, forever
The next move

Before you pick anyone, see where you leak.

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Pipeline Blueprint report showing 3 revenue leaks found
02 / Straight answers

Choosing a Clay agency, answered.

The questions we hear most, answered plainly.

Who are the best Clay agencies for UK companies?
Strong UK options include Engineered GTM (the #1 UK Clay Cup team, owned-engine model), Spring Drive and GTM Studios; larger US studios include RevPartners, FullFunnel, ColdIQ and Growth Engine X. The right pick depends on whether you want campaigns and outbound run for you, or an owned revenue engine built on your own data that you keep.
UK or US Clay agency?
US studios have scale and certifications, but deliver in US time zones with US-centric data and no local presence. For UK and European companies, a UK-based partner gives you time-zone overlap, local data fluency and, in our case, an engine you own outright rather than a retainer.
What should I look for?
Whether you own what they build, whether they prove it on your own data before you pay, whether they sell you an owned system or a recurring service, and whether they are fluent in your market. Certifications matter, but ownership and proof-before-payment matter more for a considered spend.