closed:in

closed:in is a GTM engineering agency based in Amsterdam, building outbound sales systems for B2B companies that want predictable pipeline instead of one-off campaigns.

We work with scale-ups, agencies, and B2B service providers across Europe. Our retained engagements turn a vague "we should do more outbound" into a running system: defined ICP, validated data, sequenced campaigns across email and LinkedIn, and measurable pipeline impact every week.

What we deliver:- Email infrastructure (domains, inboxes, deliverability, warmup)- ICP definition, account scoring, and TAM sizing- Lead sourcing and waterfall enrichment in Clay- Multichannel sequencing across cold email and LinkedIn- Sales-grade copywriting and AI personalization at scale- Workflow automation in n8n, connecting enrichment, CRM, and outreach- Weekly performance reporting with clear next actions

Our stack: Clay, Instantly, n8n, Apollo, Sales Navigator, HubSpot, Close CRM, plus custom AI tooling built on Claude.

Why teams pick us: we are not a copy-paste agency. Every program starts with the math (TAM, conversion targets, deal size) so we know what good looks like before sending a single email. We build systems that compound over time, not sequences that burn out in month two.

Typical results: 20 to 60 qualified sales meetings per month, depending on ICP size and offer maturity. We currently run six retained outbound programs in parallel across SaaS, recruitment, sustainability tech, and IT services.

We are a fit for B2B companies with a clearly defined ICP and a target market large enough to support meaningful outbound. We are not a fit for low-ticket SaaS, DTC e-commerce, or teams looking for a freelance-style executor.