Atlas/The first 100 buyers/Directory
105 small agencies, GTM-engineering shops and operators who run cold email for clients. 55 score 4 or 5 on fit. Every entry rests on public business sources linked from its card. No personal email addresses or phone numbers are collected. Read the ideal customer for what the fit score means and the outreach plan before contacting anyone.
105 of 105 shown. Contact rules are derived from the country and the EU country matrix. They are a first filter, not legal advice.
Rish, Founder · Goa, IN · Lead-gen agency · team Grew from 3 to 10+ in two years
A documented Instantly-to-Smartlead switcher with 50+ clients, so it has already shown it will migrate for agency support. Offshore agencies serving US clients are price-sensitive on per-client fees.
Pain signal: On leaving Instantly after 6–12 months: 'We needed more agency-focused support' — https://www.smartlead.ai/case-study/case-study-rish-cleverviral
Max Münstermann, Co-founder · Amsterdam, NL · GTM engineering / cold email agency · team Two founders plus team (own team page)
Amsterdam Clay + Instantly shop that runs one client across four countries with different consent rules: the country rule engine's best demo customer.
Pain signal: Endresz case: 'multi-market outbound rollout across NL, France, Poland and London' (https://www.closedin.io/) — Poland is a consent country
Wesley Hoang, Co-founder · Los Angeles, US · GTM engineering agency · team 2–10
Counter-signal: 'I do not want to switch to another software.' Included to show that satisfied Smartlead users exist and will not move for marginal gains.
Frederik Jakobsen, Co-founder & CEO · Aarhus, DK · Done-for-you B2B outbound agency
The hub's reference operator: 110 clients on Smartlead with 'AI-assisted reply handling' sold as part of the service. Possibly above 20 staff, which the public record does not settle.
Pain signal: Out-of-office surges and making sure positive replies were acted on quickly across many clients 'became operationally demanding' (https://www.smartlead.ai/case-study/danish-lead-co-martin-rasmussen)
Piotr Mikrut, Founder · Warsaw, PL · Prospecting agency (email + LinkedIn)
Small Warsaw agency on Smartlead whose stated problem was getting clients to see and answer their own replies: the client-portal half of the desk.
Pain signal: Before Smartlead, 'clients struggled to view and respond to campaign replies efficiently without direct access to platforms' (https://www.smartlead.ai/case-study/case-study-piotr-mikrut)
Wouter Harink, CEO & Founder · NL · B2B outbound / cold email agency · team 2–10 (Salesforge directory)
Glues Smartlead to Airtable and Make by API for multiple clients, the homemade version of a reply desk. Site says 'the four people who run delivery are the same people you meet'.
Pain signal: 'I was good at getting meetings and signing clients, but I knew I wasn't fantastic at service delivery' (https://www.smartlead.ai/blog/case-study-genflows-agency)
Eric Nowoslawski, Founder · New Jersey / New York metro, US · Clay agency · team 11–20
The archetype: ex-Clay employee, Clay Elite Studio, running dozens of client programmes across two sequencers at once. Already paid a third party to build cross-sequencer reporting and inbox auto-ordering, which is the desk's job.
Pain signal: Eric 'had tried building his own campaign analytics in Make.com and spent entire weekends fighting broken automations', before OpsKings built reporting across Smartlead, Instantly and OutboundSync (https://www.opskings.com/case-studies/growth-engine-x)
Nick Abraham, Founder · Dallas, TX (2022 press release), US · Lead-gen agency · team ~10 people (Smartlead case study)
The largest visible US operator found: 200+ clients across Smartlead and Instantly, so per-client cost and reply triage bite hardest here. He also builds tools (Scrubby, Emy with automated response handling), so he is a partner and a possible competitor.
Pain signal: Smartlead says his in-house sender 'wasn't as robust or stable as needed' — https://www.smartlead.ai/case-study/case-study-leadbird-by-nick-abraham
Xavier Coiffard, Founder & CEO · Paris, FR · Outbound agency (French and EU markets) · team 1–10 (RevenueBase listing, Sep 2026)
A 1–10 person Paris shop running 100+ clients on Smartlead's API in four EU languages and selling GDPR compliance: the multi-client, multi-country reply problem the desk is built for.
Pain signal: Smartlead case study: at their volume, 'manually triaging replies across every active campaign is not realistic', so they depend on AI tagging plus Slack alerts (https://www.smartlead.ai/case-study/lead-lead-bang-bang)
Noah Gill, Founder · SE · GTM engineering agency · team 2–10
European operator whose documented pain is reply management across many client inboxes; now markets an 'AI-managed inbox' it had to assemble itself.
Pain signal: Before Smartlead: 'had to manually check each inbox, leading to... delayed responses and missed opportunities' (https://www.smartlead.ai/case-study/case-study-leadmoves)
Charles Moriceau, Co-founder & CTO (with Maximilien Moriceau, CEO & Co-founder) · Barcelona, ES · Cold email agency (multilingual, EU-wide) · team ~8 ('from 2 to 8 strikers', own about page)
A ~€1M (founder-claimed) cold-email-only agency that onboards many small clients and writes in four languages: per-client fees and a per-recipient country rule both bite here.
Pain signal: Case study: since 'domain blacklisting grew stricter, spam filters more thorough', they say you now need 'advanced domain health', and they use Smartlead to spin up and warm per-language subdomains (https://www.smartlead.ai/case-study/case-study-letstrike)
Andrew van Rossenberg, Co-founder (with Yannick Kok) · Amsterdam, NL · GTM and RevOps agency · team Small: 'founded by two neighbours'
Two-founder Amsterdam shop that sells reply handling as part of the build ('We answer every reply and book the meeting... the right rep gets it the same hour'). That is a reply-desk SLA they deliver by hand.
Pain signal: Promises same-hour reply routing across email and ad DMs (https://nebor.ai)
Alexis Lacabane, CEO & Co-founder · FR · GTM engineering agency · team 2–10
Clay Studio + Smartlead + HeyReach expert, performance-based (appointments) model, so every reply and meeting must be proven to the client. France allows role-relevant B2B email.
Christian Plascencia, Co-founder & CMO (with co-founder Adam Rehman) · Unknown · Lead-gen agency · team Two named co-founders; size not stated
Runs 40+ clients through one master inbox and credits that inbox with doubling revenue, so reply handling is already their core workflow. A clean test of whether a better desk beats Smartlead's own.
Pain signal: Before Smartlead, routing Google inboxes to a central inbox: 'The process would break constantly, and it was inefficient' — https://www.smartlead.ai/blog/case-study-revgrowth-by-christian-plascencia
NL · Clay agency · team 2–10
Publishes GDPR guidance for clients ('assess and document their legitimate interest in advance', exclude existing customers). A ready buyer for a rule engine and provenance log.
Pain signal: Compliance burden pushed to clients: 'We advise clients to assess and document their legitimate interest in advance' (https://salesliftstudio.com/en/)
Felix Frank, Founder · London, GB · Signal-based outbound agency
UK GTM-engineering shop on Clay + Smartlead with 50+ clients: exactly the per-client-fee and reply-volume profile the desk targets, and emailable under PECR.
João Simões, Founder · Lisbon, PT · Clay agency · team 2–10
Left free tools after a hot reply sat in spam. That is the reply-desk pitch in one anecdote. Already wants API access for custom dashboards.
Pain signal: Paraphrase (case study): a Fortune-500 prospect's reply sat in spam for three days; the deal was lost — https://www.smartlead.ai/blog/case-study-virtus-medium
Orestas Nariunas, VP of Accounts · Stockholm, SE · Outbound + outsourced SDR agency · team Unknown; runs an in-house calling team at its Stockholm HQ (likely above 10)
Public complaint about one-client-per-workspace tooling; multi-market Nordic agency with a phone team that would use a shared reply queue.
Pain signal: Other platforms 'forced them into a one-client-per-workspace mess or charged extra for basic features'; tracking replies 'felt like spreadsheet gymnastics' (https://www.smartlead.ai/case-study/case-study-orestas-nariunas)
Matt Lucero, Founder · Unknown · Creator-operator · team Not stated
Runs a client agency and teaches other agency owners, so a win here reaches 350+ agencies through coaching. The Cold Email Lab Skool is small and expensive, which suits operators better than students.
Tim Yakubson, Founder · GB · Clay agency · team 2–10
Near-solo UK operator on Clay + Smartlead with a 'perform or you don't pay' guarantee; automates 'replying to leads' for clients, so the desk is in scope.
David Sinclair-Black, Founder · London, GB · Pay-per-meeting outbound agency
Prices $500 per meeting booked with a 10-booking and $5,000 monthly minimum, and credits back no-shows and 'criteria not met' (own site, Oct 2026): it needs an auditable meeting ledger.
Justin Chi, Founder · Unknown · Lead-gen agency · team 15 people incl. 4–5 consultants
A 15-person shop running every client on Smartlead, with an ex-ZoomInfo SDR founder who posts as a cold-email brand. Large enough to feel the $29 per-client fee, small enough to decide quickly.
Pain signal: Before Smartlead: 'I used a bunch of little sending tools and I just realized like we're going to spam' — https://www.smartlead.ai/blog/case-study-justin-chi-cold-email-hackers
Alexander Tsvetkov, Founder · Kyustendil, BG · Cold email agency
Instantly + Clay + HeyReach shop selling a 'scientific approach'; reply evidence (screenshots of positive replies) is its marketing, which a desk's ledger formalises.
Ryan Redmond, Founder · Unknown · Appointment-setting agency · team Not stated
An appointment setter whose stated pains are disorganised inboxes and hard client onboarding, which are the desk and client portal problems.
Pain signal: Paraphrase (case study pain list): disorganized inbox management across multiple campaigns — https://www.smartlead.ai/blog/case-study-ryan-redmond
Preeti Malik, Co-founder · Toronto, CA · Clay agency · team 2–10
Credits white-labelling for letting a small team 'punch above our weight', so the white-label client portal is what keeps this buyer.
Louis Deslus, Founder · Saubusse, FR · Multichannel B2B prospecting agency · team 'Up to 5 dedicated experts' per client (own site)
Small French agency that resells Smartlead's white-label portal to clients; lawfully emailable with a French notice.
Omar Abdalla, Founder · Espoo, FI · Message-based outbound for agencies
Sells outbound to other agencies under white-label (promises '2-3+ B2B clients every month', site title), so the client portal is part of what it resells.
Stan Stojanovic, Founder · US · GTM engineering agency · team 11–20
Clay Advanced Artisan certified on three sequencers at once; 85+ clients across them is a unified-desk problem.
Daniel Greaves, Founder & CEO · PT · Clay agency · team 2–10
Full-stack cold email agency for 5+ years that added Clay; experienced enough to judge deliverability claims.
Prince, Founder · IN · Lead-gen agency · team Solo founder
A solo operator with 500+ accounts and 15+ clients, who left his previous tool over a Microsoft outage and poor communication. Mailbox health plus a desk would save him the most hours per dollar.
Pain signal: Previous tool: 'no email activities for 25 days due to issues with Microsoft accounts' — https://www.smartlead.ai/blog/case-study-fypion-marketing-by-prince
Brigitta Ruha, Co-founder · US · GTM engineering agency · team 2–10
Clay Studio-tier GTM engineering agency that caps its client count; capacity, not demand, is its constraint, and reply triage is where operator hours go.
Pain signal: 'We limit the amount of clients we can take on so that the quality is never spread too thin' (https://www.growthtoday.co)
Jack Hayward, Co-founder · GB · GTM / outbound agency · team Small: two co-founders named on site
Two-founder UK studio (Jack and Ben) that owns sending infrastructure for clients; small enough to switch a sender for one client as a trial.
Maximilian Jendrall, CEO · Berlin, DE · Outbound / revenue-operations agency
Clearest public complaint from an EU agency about per-inbox, per-workspace pricing at scale. Partner bio says it pivoted in 2024; halfwarm.com redirected elsewhere on 5 Oct 2026.
Pain signal: Pay-per-inbox pricing was 'impractical' for 'thousands of inboxes across various workspaces' and 'disproportionately high' (https://www.smartlead.ai/case-study/case-study-halfwarm)
Berlin, DE · GTM engineering agency · team 2–10
Berlin shop running both Smartlead and Instantly plus HeyReach for a deliberately small client book; two sequencers means two reply inboxes to merge.
Sander Aavik, Co-founder · Tallinn, EE · Lead-gen agency (spun out of a web design agency) · team 9 in the lead-generation team (own about page)
Baltic Instantly shop with sales divisions in three more countries; claims €1.2M annual revenue (company claim) and is multi-country by construction.
Noah Snelgrove, Founder · US · Lead-gen agency · team Not stated
An API-heavy operator ('Smartlead's APIs ... a huge, huge game changer') with 8,000+ accounts. A desk that plugs into the same webhooks fits how he already works.
Pain signal: Paraphrase (case study): managing multiple clients became difficult as the business grew — https://www.smartlead.ai/case-study/case-study-noah-snelgrove
Dimitar D. Petkov, Co-founder (with Christian Sørensen) · Unknown · Lead-gen agency · team Not stated
Charges clients $997/month for an AI reply agent on top of a $2,500 retainer, which puts a public price on reply handling. Has also published a reasoned verdict against EmailBison.
Pain signal: On EmailBison: 'we wouldn't pick Email Bison over Smartlead or Instantly' — https://leadhaste.com/tools/emailbison
Paris, FR · B2B cold email agency · team 1–10 (RevenueBase listing)
Works inside client-owned lemlist and Instantly accounts, so replies sit in accounts the agency does not own: a desk that connects many client accounts fits.
James Barrell, Co-founder · GB · B2B outbound agency
A small UK agency already running both Instantly and EmailBison: an overlay that puts replies from two sequencers in one queue removes a real seam.
Lisbon, PT · Outbound agency (retainer + per-lead) · team Small: four team photos on site
Hybrid pricing, a retainer from €3,500/month plus a fee per qualified lead (own site, Oct 2026), needs per-client lead and meeting accounting.
Jack Blaut, Founder & CEO · Kraków, PL · AI-driven outbound agency
Runs three cold email sequencers at once and writes about GDPR for EU campaigns: tool sprawl plus compliance interest.
Pain signal: Published 'GDPR and Cold Email: What Is Allowed, and What to Avoid in B2B EU Campaigns' (18 Sep 2026) (https://outboundrepublic.com/)
Jed Mahrle, Founder & CEO · US · Clay agency · team 2–10
Small US done-for-you shop measured in positive replies per client; ex-Mailshake sales lead with a newsletter audience of outbound operators.
Gabriel Martínez, Founder · ES · Cold email agency (Spain and LatAm)
Spanish-language Smartlead and Clay shop; Spain's consent rule makes a per-recipient country engine directly useful to its clients.
Nandini Jain, Head of Growth · IN · Appointment-setting agency · team Not stated
An Indian appointment setter whose listed pain is manual inbox management. A large reply volume per campaign makes triage the bottleneck.
Pain signal: Paraphrase (case study pain list): manual inbox management consuming excessive time and resources — https://www.smartlead.ai/case-study/case-study-nandini-jain
Nicolas Schell, Co-founder & CEO · Berlin, DE · GTM engineering agency (DACH)
One of the Clay Solution Partners in Germany, 23 clients, and a Clay Community Lead hosting Berlin and Munich events: a reseller and a room full of peers in one contact.
Pain signal: Hiring a GTM engineer to keep up with 23 clients (https://community.clay.com/x/share-jobs/msg_bTB1w4leR2F9/hiring-gtm-engineer-at-clay-agency-apply-now)
Joel Moss, Founder · Unknown · Lead-gen agency · team 5 people
A five-person team monitoring many clients' inboxes, and a serial switcher (Woodpecker, Instantly, lemlist, then Smartlead). The small-team, high-reply-volume profile the desk is built for.
Pain signal: Left lemlist and Instantly: 'Lemlist had limitations on integrating multiple senders into a single campaign' — https://www.smartlead.ai/blog/case-study-social-boost-by-joel-moss
Mohan Muthoo, Founder · London, GB · GTM engineering + outbound agency
UK 'GTM Engineering lab' certified on both Smartlead and Instantly, so already multi-sequencer; Attio-featured, so CRM sync matters.
Eckental, Bavaria, DE · Clay agency · team 2–10
German Clay + Smartlead + n8n shop; German clients emailing German recipients face §7 UWG, so per-recipient gating is a live need.
Emil Jørgensen, Co-founder (with Sebastian Vinther) · DK · Outbound + RevOps agency (Clay-heavy) · team Small: two co-founders plus GTM engineers and partners listed on about page
Danish two-founder shop that has already outgrown one sequencer and named client-specific reply routing as a technical problem.
Pain signal: Co-founder's earlier agency ColdX outgrew Instantly; 'managing a master inbox that could efficiently filter and categorize emails based on custom tags and client-specific triggers was a technical challenge' (https://www.smartlead.ai/case-study/case-study-coldx-io-by-emil-jorgensen)
IE · Solo GTM engineer · team 1
Irish solo Clay engineer explicitly targeting EU startups; Ireland is opt-out, and EU clients need the country rules.
Sascha Lang, Founder (Geschäftsführer) · Mannheim, DE · Productised done-for-you cold email
German-registered but sells into the US and UK, priced as a flat retainer 'sized by daily send volume', and leans on AI reply handling.
Pain signal: 'The reply agent and the AI side of that is really helpful, especially when I have a lot of replies coming in' (https://www.smartlead.ai/case-study/tirvio)
Marc Lynam, Founder · IE · Cold email agency · team Small; founded 2024 (partner bio)
Many small clients with fast-moving leads; the case study lists coordinating responses across clients as a pain. A vertical shop where speed-to-reply drives retention.
Pain signal: Paraphrase (case study pain list): coordinating responses across different clients — https://www.smartlead.ai/blog/case-study-marc-lynam
Igor Shapiro, Founder & CEO · DE · B2B sales and investor outreach agency
German Instantly partner claiming 210+ clients across Europe and stressing DSGVO: high client count and a compliance story.
Huzaifa Majeed, Agency owner (Instantly Certified Expert) · Unknown · Lead-gen agency · team Not stated
Already sells 'reply management via proprietary AI agents and automations', which shows reply handling is valuable enough to build in-house. Could license a desk instead of maintaining its own, or turn out to be a competitor.
Pain signal: Built its own reply layer: 'Reply management via proprietary AI agents and automations' — https://www.instantly.ai/experts/huzaifa-majeed
David Lehnert, Co-founder & CEO · DE · Clay agency · team 2–10
German outbound agency on Clay + Smartlead positioned on human-sounding outreach; a decade in the industry per its founder.
CA · Clay agency · team 2–10
Done-for-you outbound booking '3–8 qualified meetings per campaign' for SaaS; per-campaign meeting proof is its product.
Kariem Abdel-Maksoud, Co-founder (with Ahmed Nubi) · Unknown · Lead-gen agency · team Not stated
Tried other tools and came back to Smartlead, so they are loyal but have looked around. Infrastructure failures and thin staffing are their listed pains.
Pain signal: 'We experimented with other options, but we never felt comfortable with them' — https://www.smartlead.ai/case-study/case-study-ahmed-nubi-kariem
Tom Grainger, CEO & Co-founder · London, GB · AI RevOps / outbound systems agency · team Founder-led (founded 2023)
Installs systems on the client's own stack and hands over by day 120, so it keeps fewer long-lived client workspaces. Projects run $30,000–50,000 (own site).
Sergio Ocampo, Founder · Unknown · Lead-gen agency · team Not stated
A non-technical team that wants the tool to handle infrastructure. That suits a managed desk and mailbox health, and it sells to other agencies, which helps distribution.
Pain signal: Paraphrase (case study): a non-technical team struggled with server configuration and authentication — https://www.smartlead.ai/blog/case-study-axoleads
Ryan Bryden, Founder · CA · Clay agency · team 2–10
Runs an outbound agency and a capital-raising firm on the same Clay + Smartlead stack; two businesses, two sets of workspaces.
Ethan Chamish, Co-founder · Unknown · Lead-gen agency · team Not stated
Says 'Ninety percent of our clients are on Smartlead', so it is Smartlead-concentrated and an overlay would not force a migration.
Michael Saruggia, Founder, fractional GTM engineer · US · Solo GTM engineer · team 1
Solo operator who trains hundreds of would-be Clay consultants: a channel to the next cohort of solo GTM engineers rather than a large buyer himself.
Milan, IT · Pay-per-appointment B2B agency · team Italian business developers; operations in Tirana, Albania (own team page)
Pay-only-for-shows model in a consent country, with a published 'GDPR & Outreach' page: needs both a meeting ledger and a recorded legal basis.
Pain signal: Publishes a dedicated 'GDPR & Outreach' policy page (https://clientium.it/team/)
John Tanner Worthington, Agency lead · Unknown · Lead-gen agency · team Not stated
Certified by Instantly, Clay and HubSpot, and tells clients to own their Instantly accounts and domains. Fits a desk that the client can see, though he may sit closer to the GTM-engineering crowd.
Juan Machado, Agency lead (Instantly Certified Expert) · Unknown · Lead-gen agency · team Not stated
A bilingual operator sending into several jurisdictions at once. A natural tester for country rules beyond the EU.
Aamir Bajwa, Founder · Dubai, AE · Lead-gen agency · team Not stated
An offshore operator whose switch was about CRM integration and keeping client workflows apart. That is the desk's CRM handoff and client isolation.
Pain signal: 'The tool I was using just couldn't keep up with the complexity of our operations' — https://www.smartlead.ai/case-study/case-study-aamir-bajwa
BE · Clay agency · team 2–10
Belgian Clay shop doing multichannel lead acquisition; sender not disclosed, so an open seat.
Michael Gardiner, Founder · Unknown · Lead-gen agency · team Not stated
Left earlier tools over downtime and features that 'didn't work as advertised'. An uptime-sensitive buyer.
Pain signal: Paraphrase (case study): frequent software downtime and features that didn't work as advertised — https://www.smartlead.ai/blog/case-study-done-for-you-by-michael-gardiner
Adam Rosen, Founder · New York, NY, US · Lead-gen agency · team Not stated; a second team member (Pranam Lipinski) is listed as an Instantly expert
A New York agency that publishes a Beehiiv newsletter on its methods. Two people are listed in Instantly's expert directory.
Tristan Wilhelmsen, Agency lead (Instantly Certified Expert) · CA · Appointment-setting agency · team 'All-Canadian team' (size not stated)
A Canadian managed-campaign and appointment-setting shop on Instantly. Canadian clients bring CASL into play, so the per-recipient rule engine has a reason to exist outside Europe.
Paris, FR · Cold email + phone agency on subscription
Flat monthly pricing from €1,390, no setup fee, cancel any month (own site, Oct 2026): a price-sensitive agency that would feel per-client tool fees.
CA · Clay agency · team 2–10
Phased validate/build/support model for early-stage SaaS; small book, sender undisclosed.
Nate Calhoun, Co-founder · Unknown · Lead-gen agency · team Not stated
One of the larger Instantly-side operators, with 100+ clients. But it gives away infrastructure and sells data, so it is part buyer, part channel and part competitor on infrastructure.
Matteo Fois, Founder · US · GTM engineering agency · team 2–10
Builds a client 'portal' and hands the engine over at day 180, so it needs per-client isolation that can be transferred; larger-ticket clients.
Jay Feldman, Founder · Unknown · Creator-operator · team Not stated
Distribution, not a first buyer: an Instantly expert who calls himself 'YouTube's top lead generation & cold email expert' and runs DFY campaigns. His audience is the high-churn student cohort (see the info-economy page).
Daniel Monteverde, Founder · Unknown · Lead-gen agency · team Not stated
A software/IT-focused agency that wanted visibility and analytics. Client-facing reporting is part of the desk.
Pain signal: 'Previous tech stack simply did not meet the demands of modern-day cold emailing' — https://www.smartlead.ai/blog/case-study-leadfield
Cesar Espino, Founder · Unknown · Lead-gen agency · team Not stated
Runs email, LinkedIn, WhatsApp and SMS, so replies arrive in several channels at once. A test of whether the desk should be multichannel from day one.
Brussels, BE · Outbound marketing and B2B acquisition agency
A lemlist-ecosystem agency in Brussels: tests whether lemlist shops (not just Smartlead/Instantly) want the desk.
Kasper Korhonen, CEO · Helsinki, FI · Nordic growth / outbound agency · team 10–49 (Salesforge directory)
Smartlead-native Nordic agency; may already be above the 20-person ceiling.
Pablo Quintana, Agency owner · Unknown · Lead-gen agency · team Team handles domains, inboxes, databases, copy
A full-infrastructure DFY operator that also runs an academy and an AI phone-agent side business (Sophias.io). An agency that also sells software and training.
London, GB · GTM engineering agency · team 2–10
Brand-led, CRM-centric GTM engineering at $10k+/month; outbound is one module, so the sender is a smaller decision.
New York, US · GTM engineering agency · team 2–10
Bills itself 'AI-Forward GTM Engineering Agency' (getaob.com) and 'Modern GTME consulting... from someone who's done it in-house before'; publishes on signal and automation design.
Pain signal: Substack post 'Too many signals and all our intent' (https://garrettawolfe.substack.com/p/too-many-signals-and-all-our-intent)
London, GB · Clay agency · team 2–10
London Clay + Instantly shop with a niche (ecom-facing SaaS), so client count can grow fast on one sender.
Seattle, US · GTM engineering agency · team 2–10
Enterprise-focused GTM engineering studio; multi-tool, CRM-wired. Less volume, more governance needs.
Lucas Maliczak, Outbound Lead & Partner · Baar, CH · GTM design and engineering agency
Swiss Clay Studio partner that also hosts a Clay Club; larger and more consultancy-shaped, but a channel into Swiss/DACH Clay users.
David Sinclair-Black, Founder & MD · Unknown · Lead-gen agency · team 1 to 8 people within a year of starting (Jan 2023)
Builds custom deliverability reports and lead alerts on Smartlead's webhooks, so he already pays in engineering time for what a desk would provide. Listed as an expert by both incumbents.
Pain signal: Paraphrase (case study): earlier platforms were lacking in webhook capabilities and scalability — https://smartlead.ai/blog/case-study-david-sinclair-black
Cole Harris, Agency lead (Instantly Certified Expert) · Unknown · Lead-gen agency · team Not stated
A high-volume Instantly operator who also sells infrastructure through MailStructures. Large reply volume, but part of the infra layer an entrant would compete with.
Qamar Mohyuddin, Cold email and Clay lead · Unknown · Lead-gen agency · team Not stated
A mid-volume multi-client operator who left earlier tools partly over unresolved support tickets. Support is a lever an entrant can pull.
Pain signal: Paraphrase (case study): previous tools had poor customer support with unresolved tickets — https://smartlead.ai/blog/case-study-qamar-mohyuddin
AJ Cassata, Founder · Da Nang, VN · Creator-operator · team Not stated
A US-born operator in Vietnam who co-hosts the 'How To Scale An Agency' podcast and co-founded a B2B sales Facebook group, so his audience is agency owners. Useful as a channel.
Johannes Fessler, Founder & CEO · ES · Cold email agency
German founder based in southern Spain running Smartlead in three languages. The website served an empty page on 5 Oct 2026.
Corentin Stephan, CEO & Founder · Paris, FR · Pay-per-opportunity lead-gen agency · team Small: a handful of people named on about page
Charges per qualified sales opportunity, from $250 (own site): needs an auditable link from reply to meeting.
Anirudh Gupta, Founder · IN · Lead-gen agency · team Not stated (founded 2023)
Lost clients when Outlook sending failed on a previous tool, which links mailbox health directly to churn. A small Indian shop that buys on reliability.
Pain signal: Paraphrase (case study): when Outlook failed, client churn accelerated — https://www.smartlead.ai/blog/case-study-anirudh-gupta
Brandon Charleson, Founder · US · GTM engineering agency · team 2–10
The most API- and MCP-literate operator in the set, but tied to Instantly (co-hosts its YouTube). Worth courting as a builder of integrations, not as an early switcher.
DE · Performance-based client acquisition for staffing firms
Performance-priced agency selling to German staffing firms; if it really runs EmailBison, it is a high-volume DACH operator.
Ryan Bryden, Founder · Unknown · Lead-gen agency · team Not stated
Praises Smartlead's HubSpot integration and real-time Slack updates, so replies already flow out to Slack and CRM. Needs a call to qualify.
Sander Poolman, Founder · NL · Lead-gen agency for B2B marketing companies
Smartlead user serving Dutch agencies, but the website did not resolve on 5 Oct 2026, so it may be inactive.
Fritz Jairus Pelaez, Independent cold email specialist · Unknown · Lead-gen agency · team Solo
A solo freelancer who brands himself on not burning domains. Small wallet, but the 'ethical' positioning fits a trust-led product.
Pain signal: 'I just needed something that simplified things' — https://www.smartlead.ai/case-study/fritz-jairus-pelaez
Atishay Jain, Founder · Unknown · Lead-gen agency · team Not stated
A named Smartlead agency testimonial. Too little public detail to rank higher without a call.
Yael, Founder, fractional GTM engineer · US · Solo GTM engineer · team 1
Former founder turned fractional GTM engineer; typical solo buyer: low volume, high API expectations, price-sensitive.
Amsterdam, NL · Cold email + LinkedIn agency
Small multichannel shop; stack unknown, so fit is a guess.
Unknown · Lead-gen agency · team Not stated
A managed-outbound agency that published a 2026 comparison favouring Smartlead's client management for agencies with 10+ client campaigns.
Pain signal: On Instantly: 'a UI that can become complex to manage when handling dozens of campaigns' — https://omnionlinestrategies.com/blog/instantly-vs-smartlead-2026
Jeremy Hood, Founder · Unknown · Founder doing own outbound · team Not stated
A niche consultant doing his own outbound and routing replies to Slack. Shows that some single-brand senders want reply alerts too, but this is not the agency core.
Pain signal: Earlier tool: 'after about two weeks, the replies went to almost zero' — https://www.smartlead.ai/case-study/case-study-jeremy-hood
Antwerp, BE · Lead generation and sales consulting
Dutch-language lead-management agency; cold email is one service among several.
Vladislav Molchanov, CEO · Toronto, CA · Lead-gen agency · team Not stated
A full-service digital agency where cold email is one line among many. Low volume today, but typical of agencies that want a done-for-them inbox.
Pain signal: Paraphrase (case study): previous platforms lacked critical features and reliable support — https://smartlead.ai/blog/case-study-vladislav-molchanov
Edinburgh, GB · Outbound agency
UK lemlist partner; little public detail beyond the listing.
To add buyers, append entries to a data/buyers-*.json file with the same schema, or create a new file. Duplicates are merged by domain at build time.