Disclosure and methodology
Kiin is on this list and publishes it. Every fact about another agency was read from that agency's own site on 18 September 2026; where something is not stated, the entry says so. Nothing here is paid placement.
Scored on: Clay partner tier as listed on clay.com/experts on 20 September 2026 (Elite Studio, Studio, Advanced Artisan) · published pricing floor and minimum engagement from the same directory · stage served · named clients · what the agency does beyond the Clay table (RevOps, ads, content) · the signals it can bring that others cannot. Not scored on: size, awards, design.
How Clay ranks its own partners, and how to read it
Clay runs a Solutions Partner programme with four tiers: Artisan, Advanced Artisan, Studio and Elite Studio, vetted for technical depth and client delivery. The tier is the most useful independent signal in this category, because it is the platform grading the agency rather than the agency grading itself, and every partner listing states a pricing floor, a minimum engagement and the stage it serves. The list below is ordered by tier, then by what surrounds the Clay work, with Kiin last because it is not a partner and says so. Two things the tier does not tell you: whether the agency runs the outbound or hands it over, and where its signals come from. Most partners buy the same job-change, funding and intent data; the agencies that also run your ads or own your website identification have triggers nobody can buy. Prices are the directory floors as of 20 September 2026 and move. What the stack around Clay looks like is in the best signal-based outbound tools; the wider agency view, including non-Clay builders, is best GTM engineering agencies.
The agencies
1. Frontal AI — best for outbound, ads and content run as one Clay system for post-PMF B2B (formerly ColdIQ Agency)
The agency half of ColdIQ under its new name, and the one whose model is closest to Kiin's: outbound, ads and content designed as one signal-based system rather than three vendors. Elite Studio status and a published floor make it easy to qualify. The fit is a B2B company past product-market fit that wants the whole motion engineered in Clay by a team that has done it hundreds of times.
Tradeoff: recent rebrand; the case studies still live under the ColdIQ name, so ask which team members carry over to your account.
2. RevPartners — best for RevOps and GTM engineering for companies on HubSpot and Clay
The HubSpot-native option: if the CRM is HubSpot and the problem is that outbound, inbound and sales data do not connect, RevPartners rebuilds the operating model first and adds Clay-driven outbound on top. Reviews on the site are about onboarding and process rather than reply rates, which tells you the shape of the work.
Tradeoff: RevOps-first; a team that only wants outbound built will find it heavier than needed.
3. Go Nimbly — best for enterprise RevOps with Clay inside an 80-person consultancy
The enterprise option: when the problem is a 40-person revenue org with three CRMs and no single view, Go Nimbly rebuilds the operating model and Clay is one of the tools. Not where a Series A company goes for an outbound system; where a public company goes for RevOps with Clay done properly.
Tradeoff: $10k+ a month and enterprise process; overkill below mid-market.
4. The Kiln — best for AI-powered inbound, outbound and RevOps systems for Series B+ and PE-backed teams
A named client list that reads like a Series B index (Windsurf, Browserbase, Sendoso) and a scope that runs from architecture to routing. The fit is a growth-stage company with a RevOps lead who wants the systems designed by people who have built them for peers, and a budget over $10,000 a month for it.
Tradeoff: $10k floor and a growth-stage focus; the seed company gets referred elsewhere.
5. Growth Engine X — best for high-volume cold email with signal-enriched lists
The volume end of the category: enterprise cold-email infrastructure, 15 to 20 campaign ideas from day one, and "niche campaigns" built on highly selective lists where only 100 to 500 people qualify at a time. The Clay and Smartlead endorsements are unusual and specific — top three in generated replies across Smartlead's platform, per its founder.
Tradeoff: built for large addressable markets; the site says itself that markets under 40k contacts are usually not a fit.
6. FullFunnel — best for GTM and RevOps diagnosis and build with a one-month minimum
The only Elite Studio with a one-month minimum, which makes it the lowest-risk way to get a Clay-native RevOps diagnosis before committing to a build. Broad by design: GTM strategy, RevOps systems and execution rather than outbound alone.
Tradeoff: breadth over specialism; ask specifically who builds the Clay tables and what they have shipped.
7. Peakora — best for signal-based SDR agents for DACH and European B2B, any budget
The European entry with the most specific published playbooks: which signal, which agent, what conversion. DACH-native with French and German, and the only Studio partner listing "any budget", which makes it the realistic first Clay partner for a European seed or Series A company.
Tradeoff: SDR-agent positioning; ask what a human does between the signal and the meeting.
8. CS2 — best for subscription GTM operations for fast-growing B2B tech, with the deepest client list
If the question is "who has done this for companies like Notion and Gong", CS2 is the answer on this page. Subscription-based, six-month minimum, and scoped as an operations function rather than a campaign.
Tradeoff: $10k+ and six months up front; the smallest engagement is bigger than most companies' first Clay budget.
9. Growth Today — best for signal-based GTM systems for B2B SaaS that already has traction
A pure GTM engineering shop with the playbooks on the page, aimed at companies that already have a motion to compound rather than one to invent. The fit is a Series B SaaS team on HubSpot that wants the signal-to-outbound system built and kept.
Tradeoff: traction required by design; pre-revenue companies are not the ICP.
10. LeadFabric — best for EMEA enterprise ABM and demand gen with Clay inside the programme
The EMEA enterprise agency on the list: Clay is the integration layer inside a full ABM and demand programme rather than the product. Three offices, five languages, and an RFP process, which tells you the size of company it serves.
Tradeoff: enterprise programme shape; not the place for a founder who wants an outbound system built in a month.
11. Enablement — best for "AI-allbound" for European B2B tech with 52 Clay accounts implemented
More implementations on the record than anyone else on this page (52 Clay, 85 HubSpot), with outcomes stated as numbers. The fit is a German or European B2B tech company on HubSpot that wants inbound scoring and outbound built together by a team that has done the HubSpot side dozens of times.
Tradeoff: outcomes are self-reported and unnamed; ask for the account behind the 80% SDR reduction.
12. OneThousandPieces — best for Clay workflows for funded scale-ups, any budget, one-month minimum
The most flexible terms of any Studio partner (any budget, one month) with a named list of funded scale-ups across the US and Europe. The fit is a Series A to C company that wants specific Clay workflows built, piece by piece, without a six-month retainer.
Tradeoff: workflow-shaped rather than motion-shaped; you own the design.
13. demandDrive — best for demand generation with outbound SDR capacity attached
demandDrive's pitch is fixing the gaps between marketing activity and sales follow-up before adding more activity — "add activity without fixing those gaps and you get noise" — which is why it sells demand generation and SDR capacity together. It is the option on this list for a company whose problem is what happens to the lead after the campaign.
Tradeoff: an SDR-led model; if you want demand created through content and media rather than worked by reps, look elsewhere on the list.
14. Understory — best for paid media, GTM engineering and LinkedIn content run by one team
The "allbound" model: a paid strategist, a go-to-market engineer and a content writer share one dataset and one target list, so the LinkedIn ads warm the accounts the outbound then works. Understory has said publicly that answer-engine visibility became its largest lead source, and its client list is the strongest on this page for a small team. The HeyReach testimonial is the pointed one: "$50k with no ROI on LinkedIn ads" before Understory, three meetings booked with a fraction of that after.
Tradeoff: a six-month minimum and no published fee; the model needs the client to want outbound and content as well as media.
15. frontBrick — best for outbound, ads and RevOps engineered into one signal-based engine in Clay for $1M+ revenue B2B
Same thesis as Kiin and Frontal (outbound, ads and RevOps as one engine) at Artisan tier and any budget, with an ABM lean. The fit is a company above $1M revenue that wants the combined system and a smaller shop.
Tradeoff: Artisan tier means a small team; capacity is the question.
16. RevenueHoop — best for fully-serviced RevOps powered by Clay across HubSpot, Salesforce and LeanData
The RevOps-first Artisan: Clay for clean data and automation across the CRM stack, with campaigns as the output. The fit is a growth-stage team whose problem is data and routing before it is outbound.
Tradeoff: RevOps shape; ask what outbound they have run end to end.
17. Kiin — best for Clay builds where the trigger is your own LinkedIn ad engagement, not purchased intent
Kiin is on this page for one reason: the signal. Every Clay agency can build a table that fires on a job change or a funding round, because every one of them buys the same data. Only an agency that also runs your LinkedIn ads can put "engaged with our thought leader ad yesterday" into Clay as a trigger, and that signal replies at multiples of purchased intent. The Clay build is standard (waterfalls, suppression, AI columns, CRM sync) and lives in your workspace; what is different is what feeds it.
Tradeoff: we wrote this list; and we are not a Clay partner. If you want a certified Clay Studio with no ad spend attached, pick one of the sixteen above.
Side by side: Clay partner tier, floor, minimum, stage
| Agency | Clay tier | HQ | Floor and minimum | Stage served | Named clients |
|---|---|---|---|---|---|
| Frontal AI | Elite Studio | US | $5k+/mo, 3-month min | Seed to enterprise | ColdIQ book (275+ companies) |
| RevPartners | Elite Studio | US | Not published | HubSpot companies | Empower Brands, Snappt |
| Go Nimbly | Elite Studio | US / global | $10k+/mo, 3-month min | Mid-market, enterprise, post-IPO | Not named on directory |
| The Kiln | Elite Studio | US | $10k+/mo, 3-month min | Series B to post-IPO | Windsurf, Browserbase, Sendoso, Loxo |
| Growth Engine X | Elite Studio | US | Not published, 3-month min | Series B to post-IPO, $5k+ LTV | Forbes, Y Combinator, Refine Labs, Instantly |
| FullFunnel | Elite Studio | US | $5k+/mo, 1-month min | Seed to post-IPO | Not named on directory |
| Peakora | Studio | Switzerland (DACH) | Any budget, 3-month min | Seed to enterprise | 200+ companies, not named on directory |
| CS2 | Studio | San Jose, CA | $10k+/mo, 6-month min | Series B to enterprise | Notion, Gong, Coursera, Salesloft, Scale AI |
| Growth Today | Studio | US | $5k+/mo, 3-month min | Series B to enterprise | Not named on directory |
| LeadFabric | Studio | Brussels, London, Bucharest | $10k+/mo, 3-month min | Mid-market, enterprise (EMEA) | Not named on directory |
| Enablement | Studio | Europe (DACH) | $5k+/mo, 3-month min | Seed to enterprise | 52 Clay / 85 HubSpot implementations, not named |
| OneThousandPieces | Studio | France | Any budget, 1-month min | Series B/C, mid-market | nTop, FlutterFlow, Caresyntax, OfferUp |
| demandDrive | Studio | US | Not published | B2B with SDR need | Not named on directory |
| Understory | Advanced Artisan | US | Any budget, 6-month min | Seed to post-IPO | Clay, Zapier, Expensify |
| frontBrick | Advanced Artisan | US | Any budget, 3-month min | $1M+ revenue B2B | Not named on directory |
| RevenueHoop | Advanced Artisan | US | $5k+/mo, 3-month min | Seed to post-IPO | Not named on directory |
| Kiin | Not a partner; builds in your workspace | London | $9,500/mo (with paid media), published | Seed to Series C, sales-led B2B SaaS | Fibbler, Lead Forensics, Sova Assessment |
How to choose
- Check the tier on clay.com/experts yourself. It changes, and "Clay partner" on an agency site can mean Artisan or Elite Studio.
- "Who owns the workspace?" Build in your Clay account, on your credits, with your login. Anything else is a rental.
- "Which signals do you bring that we cannot buy?" Website visitors, product usage, your own ad engagement. The rest is on the marketplace for everyone.
- "What is the floor, the minimum, and what happens at month four?" Directory floors run from any budget to $10k+; minimums from one to six months.
- "Show me the table and the message it produced." The Claybook, not the deck.