# closed:in

> GTM engineering for B2B teams that scale

- Canonical listing: https://agencysource.com/agencies/closedin
- Location: Amsterdam, Netherlands
- Categories: [GTM Engineering](https://agencysource.com/categories/gtm-engineering), [Account-Based Marketing](https://agencysource.com/categories/account-based-marketing), [Advertising & Media Buying](https://agencysource.com/categories/advertising), [Cold Email](https://agencysource.com/categories/cold-email), [LinkedIn Outreach](https://agencysource.com/categories/linkedin-outreach), [HubSpot Agencies](https://agencysource.com/categories/hubspot-agencies)
- Services: Direct Marketing, Account-Based Marketing, Demand Generation Marketing
- Team size: 2 - 9
- Hourly rate: Undisclosed
- Minimum project: $5,000+
- Founded: 2025
- Website: https://www.closedin.io
- Listing: Not yet claimed
- Agency Source rating: no Agency Source reviews yet

## About

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.

---

Source: Agency Source, https://agencysource.com/agencies/closedin. Ratings and reviews come only from reviews submitted and moderated on Agency Source; agencies cannot pay for rank.