Partner spotlight: Lead Assassin

Hire most outbound agencies and the system that books your meetings lives in their tooling. End the engagement and the engine leaves with them. Lead Assassin builds it the other way around — inside your own stack, so the pipeline machine stays yours.

Lead Assassin is a Philippines-based outbound and GTM engineering agency in the OutboundSync directory: a team that designs and runs revenue systems for B2B startups across email, social, and phone. They run the program on the platforms OutboundSync supports, and use OutboundSync to land that activity in the CRM.

Who’s behind it: Ericson Dalusong

Lead Assassin was founded by Ericson Dalusong, a cold email operator who runs the team from Manila and hosts the local Clay Club community. The agency is built on one idea — the outbound system should belong to the company running it, not the agency that built it — and Dalusong’s operator background is what lets it deliver on that: by his own account, six-plus years of cold email, millions of messages sent, and 5,000+ B2B opportunities generated on Lead Assassin’s site.

Why Lead Assassin builds systems you own

Most outbound comes down to a list and a sending tool, run inside the agency’s own account. Lead Assassin works a layer up: it builds GTM infrastructure — outbound, inbound, and RevOps — and the systems it stands up stay inside the client’s own infrastructure, with no vendor lock-in. When the engagement ends, the engine doesn’t leave.

The work is built on the Clay platform and an AI-driven personalization layer. Lead Assassin designs, deploys, and optimizes the Clay workflows that automate the GTM motion — sourcing, enrichment, and routing — so the pipeline runs cleaner without a larger team behind it.

What Lead Assassin actually builds

Lead Assassin runs the full outbound cycle and the system underneath it. Its services span outbound campaign planning and management, full GTM engine design across outbound and inbound, GTM intelligence (TAM mapping, buying-signal identification, and sales-play development), and RevOps implementation — CRM architecture, lead scoring, pipeline automation, and dashboards.

The stack goes deep on Clay for the data layer and runs the rest on tools like Smartlead, Instantly, Lemlist, HeyReach, Attio, HubSpot, Salesforce, Pipedrive, n8n, and OutboundSync. Outreach runs across three channels — email, social, and phone — rather than a single motion.

The client roster is specific: Fraudio, Occuspace, Stable Sea, Targhee Security, IOMETE, PeoplesHR, Wolf IQ, and Textgrid among them. The results they publish are concrete, too — Targhee Security reports pipeline up 4x, Fraudio runs 2–3 meetings a week and saves roughly 20 hours a week on RevOps, and Occuspace reached 100% automated sourcing.

Who Lead Assassin is for

Lead Assassin fits B2B startups and revenue teams that want a structured outbound and GTM system instead of a one-off batch of leads. It is a strong match for software, web development, and tech-enabled service companies that want the pipeline engine built for them — and kept in their own stack when the work is done. The flexible model means a team can take the fully managed build or work alongside Lead Assassin on it.

The fit with OutboundSync

Lead Assassin already runs on the platforms OutboundSync supports — and lists OutboundSync in its own tech stack. They build and run the engine — sourcing, data, sequences, and follow-up across email and social — and OutboundSync makes the resulting activity visible on the right records in HubSpot or Salesforce so the rest of the revenue team can act on it.

If you want an outbound and GTM system built to live inside your own stack, Lead Assassin is a team to know.