Top 10 Best Clay Agencies

Vanderbuild is a GTM engineering agency founded by Mateusz Sekta. They finished as Clay Cup Vice-Champions, ranked second in the world and first in Europe.

Their work runs on two tracks. The outbound track covers volume, micro and signal-based campaigns. The CRM track cleans, enriches and scores the records underneath.

They launched 250+ outbound campaigns in 2025 and have built 50+ revenue engines across Europe and the US. Pricing comes as a retainer, a project fee or pay per warm lead.

What I liked most is how open they are about running costs. Their site puts an in-house Clay plan at roughly $180 a month, plus separate sequencing and LinkedIn tools. That helps if you plan to bring the GTM engineering work in-house later.

B2B Boosted is led by founder Tim Yakubson and calls itself one of the first Clay-certified partners in the UK. Clay sits at the center of every system they build.

The pricing model is unusual for this space. Instead of a monthly retainer, they install a custom sales automation system for a one-off fee starting at £4,000.

You can test them first with a free custom automation. A 14-day satisfaction guarantee with a full refund sits on top of the paid build. The trade-off is that someone on your team has to run the system after handover.

Everything lives in accounts you own and gets handed over with documentation. Tim also teaches a paid Clay course, so the method is public before you buy. If you are still judging the platform itself, my Clay review covers where it earns its cost.

Growth Alliance is a growth and AI operations partner for B2B companies between $5M and $50M in ARR. Clay sits next to Cargo, Swarm, HubSpot and Salesforce in their builds.

The team is deliberately small, with three principals and no bench. They cover 16 hours a day across US and EU time zones and take only four to six clients at once.

Engagements run as 90-day sprints. Programs start at $10K a month, and monthly retainers carry a 60-day rolling cancellation.

I appreciated how plainly they list who they turn away. Price shoppers, short trials and committee-led buying decisions are all named as poor fits. If you are torn between GTM engineering and RevOps, this team covers both sides.

Zevenue is a Toronto GTM engineering firm that has worked on AI in go-to-market since 2021. They focus on Series A to C SaaS startups whose buyers rarely appear in generic databases.

That niche shapes every build. Their Clay TAM work combines web scraping, job-post mining and integration directories to find accounts that Apollo and ZoomInfo miss.

Their opening question stuck with me. They ask how you would approach one lead with a full day to research them, then scale that depth across the market.

Clients can keep Zevenue running the system or take it in-house with SOPs and training. A separate four to eight week program teaches reps to build their own Clay and Claude workflows. They also say plainly that they are not for teams wanting guaranteed meetings next week.

Nebor is an Amsterdam GTM agency started by two neighbors with 18 years of shared sales and marketing experience. They build outbound, inbound and RevOps systems with Clay at the center.

Their Clay work covers signal-based outbound, fast inbound lead routing and website visitor identification. Clay connects to n8n, HubSpot and your outreach tools so the motion runs as one system.

Strategy comes before tooling here. They build one use case first and prove it before expanding. They also warn upfront that they will ask a lot of your team.

Client Dymaxa credits them with adding over €3M to its pipeline. They work in English and Dutch across Europe and the US, with a three-month minimum.

Groflo is a growth engineering firm for Series A to C B2B tech companies. They build the outbound engine inside your own Clay workspace, then run it with forward-deployed SDRs.

The Clay layer covers ICP scoring, signal-based sourcing and enrichment waterfalls for verified emails and mobiles. Sequences go out through Instantly or Smartlead with two-way CRM sync.

The SDR side is what sets them apart. A dedicated rep makes 40+ dials a day into those campaigns and hands meetings to your AEs with context.

Engagements start at $6,000 a month on quarterly terms, with the engine live in about three weeks. They look for $5k+ ACVs and a TAM above 20,000 accounts.

Paris-based novlini is a GTM and RevOps studio. They are a certified Clay partner and were the first Attio Expert Partner worldwide.

Their pitch starts from a failure mode they see often. Teams buy Clay, build three tables and stop while credits burn and pipeline stays flat.

The team runs Clay inside Attio implementations every week. They say they know where that integration breaks and how to structure tables that hold up at 50,000 rows. Teams on a classic HubSpot or Salesforce setup may get less value from that specialism.

Work starts with a fixed-price Foundation Month that ships the first production workflow. After that, a day-rate retainer covers new plays, with no markup on tooling.

LeadHaste describes itself as a Clay-first outbound studio and has worked with 50+ B2B companies since 2023. Domains, inboxes and Clay boards all live in your own accounts.

The managed system starts at $2,500 a month with the software included. Infrastructure of 50 domains and 100 inboxes is billed at cost, roughly $350 a month.

The first three months are fixed, then it moves to month-to-month. Buying signals from tools like Trigify and RB2B decide when each prospect enters a campaign.

Their HelpMatch case study shows the compounding effect well. Meetings grew from 14 to 120 a month by month six on the same budget.

DealDeploy builds automated deal sourcing systems for search funds, independent sponsors and private equity firms. It is one of the few Clay partners built entirely around investors.

Their Clay work maps a market against your investment mandate. Language models then score qualitative markers that firmographic filters tend to miss.

They also clean and enrich the targets already in your CRM, then route new companies into email sequences. One PE partner says a sourcing sprint dropped from 8-10 hours to about 30 minutes.

Everything they build lives in a GitHub repo your firm owns. Pricing starts at $10k+ a month with a one-month minimum.

Outcome is a Seoul GTM engineering team that helps East Asian beauty and health brands sell abroad. Their Clay systems find international distributors, retailers and brand partners.

Signal-based prospecting is the core of the work. Their workflows watch for product launches, new market entry and regional hiring, then surface the sourcing contacts at each account.

One case study follows a beauty brand mapping distributors across North America, Europe and the Middle East. Within a few weeks it was talking directly with international buyers.

They work in English, Korean and Mandarin, starting around $5k a month on three-month terms. They also run Clay workshops and Clay Cup meetups in Korea. Their homepage is in Korean, which tells you where their core clients sit.