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Key Findings
Built entirely around Clay, Smartlead, and HeyReach, Claygencies run signal-triggered multichannel campaigns that outperform traditional outbound on reply rates, speed to launch, and outcome ownership.
Reachly's Primal campaign hit 8% positive reply rate on signal-triggered sequences versus 1 to 2% typical of bought-list outreach. Same team, same market, different methodology.
Specialists like Reachly run pure multichannel outbound through booked meetings. Full-scope agencies like ColdIQ, SalesCaptain, and EarLeads bundle content, ads, and LinkedIn alongside outbound. Match the agency to your actual need, not the most impressive positioning.
US and UK agencies running APAC campaigns miss cultural context and often send at the wrong local times. APAC-based Claygencies like Reachly outperform equivalent US-based competitors on APAC-targeted outbound at the same budget.
If the agency refuses to transfer ownership of domains, mailboxes, Clay workspace, and workflows when the engagement ends, you are renting a pipeline rather than building one. The better agencies give you ownership from day one.
Most lead generation agencies in 2026 are still running a 2019 playbook. Bought lists from Apollo. Templated cold emails with a first-name variable. VAs manually scraping LinkedIn. One channel at a time. Hope something sticks.
Meanwhile a new category has quietly taken over the top of the market. They're called Claygencies. They run entire outbound operations through Clay, Smartlead, and HeyReach. They target on real-time signals, not static lists. They coordinate email, LinkedIn, and phone into a single system. And they're booking meetings that traditional agencies can't touch.
This article breaks down 11 Claygencies worth knowing in 2026, how they differ from traditional lead generation agencies, and how to pick the right one for your stage. Reachly sits at the top because we wrote this, yes, and because the results back it up. You can decide for yourself after you read the full list.
What Is a B2B Lead Generation Agency?
A B2B lead generation agency is a service provider that helps other businesses find, qualify, and engage potential buyers, usually through outbound channels like cold email, LinkedIn outreach, and cold calling. Instead of the client hiring and training an internal SDR team, the agency runs top-of-funnel prospecting on their behalf and delivers qualified meetings or sales-ready leads to the client's sales team.
Most B2B lead generation agencies fall into one of three buckets. Appointment setting agencies focus on getting meetings on calendars, often using teams of offshore SDRs running volume outreach. Cold email specialists build email infrastructure and run sequences at scale, sometimes adding LinkedIn as a secondary channel. Multichannel or full-service agencies coordinate email, LinkedIn, phone, and sometimes paid ads into a single campaign, handle reply management, and take the engagement through to the booked meeting.
Pricing varies widely. Budget agencies charge $1,000 to $3,000/month and typically run volume-driven email campaigns on bought lists. Mid-market agencies run $3,500 to $10,000/month for signal-based multichannel work. Enterprise-level agencies with fractional CMO services or full GTM scope charge $15,000 to $50,000+/month. Most require a 3 to 6 month minimum commitment because outbound needs time to compound. First meetings typically land in month 1, break-even around month 3, and healthy campaigns show 3 to 5x ROI by month 6.
The category has split in 2026. Traditional lead generation agencies still dominate in volume and brand recognition, but a newer category called Claygencies has taken over the top of the market by rebuilding the entire playbook around Clay, Smartlead, and HeyReach. That's what the rest of this article is about.
What Is a B2B Lead Generation Agency?
What Is a Claygency?
A Claygency is a lead generation agency built entirely around Clay as the central data and orchestration layer, with signal-based targeting and multichannel execution baked into every campaign.
The term started circulating in the Clay community in 2024 and has since become the accepted label for a specific type of outbound operator. The difference between a Claygency and a traditional lead generation agency is the difference between a software company and a team of people with spreadsheets. Both might produce leads. Only one compounds.
A real Claygency runs on three pillars. First, data. Clay sits at the center, pulling from 75+ providers with waterfall enrichment so no prospect slips through. Second, signals. Hiring moves, funding rounds, tech stack changes, website visits, content engagement. Campaigns trigger based on what companies are actually doing, not static ICP fit. Third, channels. Email through Smartlead, LinkedIn through HeyReach, and phone calls sequenced together so prospects see the same name across three touchpoints before anyone picks up.
The shorthand: traditional lead gen agencies run campaigns. Claygencies build systems.
A real Claygency does not just use Clay to find leads and push them to a sequencer. A real Claygency uses Clay to layer multiple signals across the client's total addressable market, then tiers and scores companies based on which signals matter most. We run trigger campaigns at the same time as evergreen ones, so we catch companies that just hired, just lost a champion, or just raised a round. Evergreen plus triggers, not one or the other.
Claygency vs Traditional Lead Generation Agency
The distinction matters because the two models produce completely different outcomes. Most buyers do not know which one they hired until 90 days in, when the pipeline either shows up or it does not.
The gap is not cosmetic. A Claygency reply rate of 8% on a signal-triggered campaign beats a traditional agency's 1% reply rate on a bought list by eight times, and the quality of conversations is completely different. Someone who just posted about struggling with churn and gets an email 48 hours later is a very different prospect than someone pulled off an industry filter.
How Do B2B Lead Generation Companies Work?
A B2B lead generation company is a service provider that helps other businesses find, qualify, and engage potential buyers, usually through outbound channels like cold email, LinkedIn outreach, and cold calling. Instead of the client hiring and training an internal SDR team, the agency runs top-of-funnel prospecting on their behalf and delivers qualified meetings or sales-ready leads to the client's sales team.
Most B2B lead generation companies fall into one of three buckets. Appointment setting agencies focus on getting meetings on calendars, often using teams of offshore SDRs running volume outreach. Cold email specialists build email infrastructure and run sequences at scale, sometimes adding LinkedIn as a secondary channel. Multichannel or full-service agencies coordinate email, LinkedIn, phone, and sometimes paid ads into a single campaign, handle reply management, and take the engagement through to the booked meeting.
Pricing varies widely. Budget agencies charge $1,000 to $3,000/month and typically run volume-driven email campaigns on bought lists. Mid-market agencies run $3,500 to $10,000/month for signal-based multichannel work. Enterprise-level agencies with fractional CMO services or full GTM scope charge $15,000 to $50,000+/month. Most require a 3 to 6 month minimum commitment because outbound needs time to compound. First meetings typically land in month 1, break-even around month 3, and healthy campaigns show 3 to 5x ROI by month 6.
Underneath all of those buckets, the actual work breaks down into five core services every serious B2B lead generation company provides:
How Do B2B Lead Generation Companies Work?
How We Ranked the Top Claygencies
Most agency ranking articles do not tell you how they ranked the list. We are going to, because without methodology the list is just opinion.
Here is what we weighted.
The 11 Top Claygencies in 2026 (At a Glance)
Before the detailed write-ups, here is the full list.
- Reachly
- ColdIQ
- SalesCaptain
- EarLeads
- OneAway
- LeadBird
- FullFunnel
- StackOptimise
- Navreo
- Sales Automation Systems
- Lead Assassin
The 11 Top Claygencies in 2026
1. Reachly
Reachly is APAC's first triple-certified Claygency, officially certified across Clay, Smartlead, and HeyReach. Headquartered in Bangkok at G-Tower, Reachly runs done-for-you multichannel outbound campaigns for B2B companies across APAC, USA, Canada, UK, and ANZ.
The approach is signal-first. Campaigns trigger on hiring moves, funding rounds, tech stack changes, content engagement, and individual-level website visits via RB2B. Clay sits at the center of the data layer, waterfalling through Icypeas, LeadMagic, and BetterContact for email finding, with MillionVerifier and ZeroBounce handling validation. Smartlead runs the email layer. HeyReach handles LinkedIn. Cold calling layers on top, strategically placed after email and LinkedIn touches so prospects have seen the name twice before the phone rings.
Reachly has booked 2,500+ calls and generated $3M+ in pipeline across 50+ B2B clients and 400+ campaigns. Primal, a Thai digital marketing agency, hit 85 SQLs, 8% positive reply rate, 6 new deals signed, and 4.57x ROI in six months with a 35% CAC reduction. The Great Room, a premium coworking operator across Singapore and Australia, went from 2 face-to-face meetings per quarter to 2 per month and signed a $250K contract with zero added headcount.
Best for: B2B founders, heads of sales, and CMOs doing $1M to $50M in revenue who need pipeline without building an SDR team. Minimum client threshold is $30K+/month in revenue. Pricing starts at $3,500/month.
Where Reachly wins: Signal-based outbound executed through booked meetings, done for you, with APAC language and cultural fluency most US/UK agencies cannot match.
2. ColdIQ
Founded by Michel Lieben, ColdIQ is a France-based outbound agency that has scaled to $7M ARR and 70+ active clients. They are one of the most visible Claygencies globally, running what they call the "GTM Flywheel" — content, ads, and outbound operating as one integrated system rather than three siloed programs.
The stack is serious. Clay for data, Instantly and Lemlist for email, HeyReach for LinkedIn, RB2B and Common Room for intent signals, Apollo and Prospeo for prospecting, plus AI-native workflows for personalization at scale. Case studies include AirOps ($3M pipeline in three months), Aircall (3,655 new accounts in six months), Teikametrics ($300K+ pipeline in nine months), and Hemlane (830 leads, 5.5% reply rate, 0.5% bounce).
Best for: Series A+ B2B SaaS with budget (pricing starts around $5K+/month, minimum 3-month commitment) that wants an AI-native outbound engine combined with content and LinkedIn ads.
Where ColdIQ wins: Depth of tech stack and the GTM Flywheel approach. They are not just running outbound. They are wiring the full top-of-funnel demand machine.
3. SalesCaptain
SalesCaptain is a UK-headquartered B2B outbound agency founded by Bill Stathopoulos and Panagiotis Sisamos. They have served 60+ clients across B2B SaaS, services, and agencies with an 80-person team split across the USA, Canada, UK, Europe, and Asia. Clay certified, Smartlead partnered.
Services run wider than most Claygencies: multichannel outbound (email, LinkedIn, text), multichannel paid ads, LinkedIn content marketing, and RevOps. They also run a go-to-market content program with guides, podcasts, and comparison pages that drive strong organic traffic — which is itself a moat.
Best for: B2B tech and service businesses that want outbound execution plus content and paid ads under one roof, not outbound-only.
Where SalesCaptain wins: Scale. 80 people across five regions means they can run volume that smaller Claygencies cannot. The content-driven inbound layer also means outbound touches hit prospects who have already seen the brand.
4. EarLeads
EarLeads positions itself as "GTM Engineering as a Service" rather than a traditional outbound agency, founded by Othmane and trusted by YC-backed startups. The approach is allbound — content systems, paid ads systems, and outreach systems built directly into the client's infrastructure rather than run inside the agency's tools.
Client results are strong. AskUI booked 50+ inbound enterprise demos and generated 3,000+ self-serve account signups. Other clients report $10M pipeline, $7M closed-won, 1.5M organic impressions, and 125 meetings booked through signal-amplified content systems. The promise is that when the engagement ends, the client keeps everything that was built.
Best for: Series A to Series C B2B SaaS that wants a full GTM operating system rather than pure outbound, and values owning the infrastructure long-term.
Where EarLeads wins: Infrastructure ownership. Most agencies build inside their own tools. EarLeads builds inside yours, so the system survives after the contract.
5. OneAway
OneAway is a US-based outbound agency focused on productized Clay-powered campaigns. They run a tighter playbook than the full-service Claygencies, focused specifically on outbound execution with Clay workflows as the data backbone.
Best for: Mid-market B2B companies that want focused outbound execution without paying for content, ads, or RevOps services bundled on top.
Where OneAway wins: Focus. Clay-powered outbound, nothing else in the way.
6. LeadBird
LeadBird is a US-based cold email specialist and official Clay Solutions Partner. The agency focuses on high-volume cold email infrastructure — dedicated domains, mailbox rotation, and deliverability discipline — for teams that need email as the primary channel.
Best for: Companies that want cold email as the main driver and need serious infrastructure to support volume without burning sender reputation.
Where LeadBird wins: Email infrastructure depth. They treat deliverability as the job, not an afterthought.
7. FullFunnel
FullFunnel runs outbound combined with fractional SDR support. The model is hybrid: Clay-powered outbound systems plus actual SDRs who work replies and qualify inbound interest.
Best for: B2B companies that want outbound generation plus human SDRs to qualify and hand off to AEs, without building either function in-house.
Where FullFunnel wins: The SDR layer. Outbound that generates replies is only half the job. FullFunnel runs the qualification step too.
8. StackOptimise
StackOptimise is a UK-based Claygency focused on technical Clay implementations and RevOps. They build complex Clay workflows, CRM integrations, and data architectures for ops teams that need more than a plug-and-play outbound setup.
Best for: Ops-heavy B2B teams that need Clay wired into HubSpot, Salesforce, or custom CRM schemas with governance and data hygiene baked in.
Where StackOptimise wins: Technical depth. This is the agency to call when your Clay build needs to survive an enterprise security review.
9. Navreo
Navreo runs AI-driven signal-based outbound, using Clay and AI agents to monitor buying signals and trigger outreach at the moment of highest intent.
Best for: Companies that want the most automated, agent-driven version of Claygency execution, with less manual campaign management.
Where Navreo wins: AI-native signal monitoring. They treat signals as a 24/7 feed rather than a weekly list pull.
10. Sales Automation Systems
Sales Automation Systems focuses on building custom Clay workflows and outbound automation infrastructure. They sit at the more technical end of the Claygency spectrum, often handing over ownership of the systems they build.
Best for: Teams that want a custom Clay automation build and can run the day-to-day outbound themselves once the system is live.
Where Sales Automation Systems wins: Custom workflow builds for teams that will operate the system in-house.
11. Lead Assassin
Lead Assassin layers cold calling on top of cold email and LinkedIn outreach. They are one of the few Claygencies that treats the phone as a core channel, not an afterthought.
Best for: B2B companies with high-ACV deals where a human voice on the phone adds conversion power that email and LinkedIn alone cannot.
Where Lead Assassin wins: The calling layer. Outbound plus phone as a standard part of the sequence.
How to Choose the Right Claygency for Your Stage
Not every Claygency fits every company. The matching logic usually breaks down along three axes.
Stage. Early-stage companies without product-market fit should not hire a Claygency. Outbound amplifies whatever you already have. If your offer is weak or your ICP is unclear, a Claygency will generate meetings that never close, and you will blame the agency when the problem is upstream. Wait until you have repeatable closed-won deals from at least two acquisition channels before hiring outbound execution.
Geography. APAC-based companies selling into APAC should hire APAC-based agencies. Language, cultural context, and time zones matter more than most buyers realize. US/UK agencies running APAC campaigns often miss the tone, reference the wrong cultural shorthand, and show up in the inbox at 3am local time. The same applies in reverse. Hire agencies based where your buyers live.
Scope. If you want content, ads, LinkedIn thought leadership, and outbound under one roof, hire a full-scope Claygency like ColdIQ, SalesCaptain, or EarLeads. If you want the sharpest pure-outbound execution without paying for bundled services you will not use, hire a specialist like Reachly, OneAway, or LeadBird.
A Reachly-style signal-triggered sequence looks like this:
Red Flags When Hiring a Claygency
Not every agency calling itself a Claygency in 2026 earns the name. A few warning signs.
🚩They cannot name their tool stack. A real Claygency will tell you in 30 seconds: Clay for data, Smartlead or Instantly for email, HeyReach for LinkedIn, plus whatever intent signal layer they use. Vague answers mean they are a traditional agency with a Clay account.
🚩They charge for a 50-page strategy deck before execution. Healthy Claygencies can tell you within two calls what the engagement looks like, what it will cost, and roughly how your first 30 days go. Diagnostic phases that bill $20K+ before anyone touches a sequence are a scope-creep signal.
🚩They report on opens and clicks. Opens are broken by Apple Mail Privacy Protection. Clicks are broken by link-tracking disabled clients. Any Claygency still leading with these metrics in 2026 is reporting activity, not outcomes.
🚩They cannot produce named case studies. "We have helped hundreds of clients" with no named logos and no specific numbers means the results probably do not exist. Real Claygencies publish specifics.
🚩They do not own the infrastructure. If the agency runs everything inside their own Clay workspace, Smartlead account, and HeyReach seats — and refuses to transfer ownership when you leave — you are renting a pipeline, not building one. The better model gives you ownership of domains, mailboxes, and workflows from day one.
Where the Claygency Category Is Heading
The Claygency category is still in its early innings. Clay hit $1.5B valuation in 2024 and has been doubling users annually. Every agency worth hiring in 2026 is a Claygency by default, even if they do not use the term. The split between Claygencies and traditional lead gen agencies will finish closing by 2027.
What comes next is agentic outbound. AI agents that monitor signals 24/7, qualify prospects without human input, draft personalized outreach, and hand off only the meeting-ready conversations. The agencies already wiring Claude Code, AI Ark, and custom research agents into their Clay workflows will separate from the ones running 2024 playbooks. Individual-level website visitor identification through tools like RB2B is also becoming standard for the top tier — not every Claygency has it yet, but every serious one will within 18 months.
The agencies listed here are the ones Reachly watches most closely. They are building the category.
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