closed:in - Scale Your Outreach Without Scaling Your Team
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Scale Your Outreach
Without Scaling
Your Team

Clay-powered outbound campaigns for B2B service companies that want more sales calls within 2-3 weeks. Official Clay Solutions Partner running production workflows daily.

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Trusted by 50+ B2B companies
Verzendbazen
WeTaxus
Rewize
Zano
Jamezz
Endresz
Thomas Scott & Co
Clay
Clay Solutions Partner Certified
Instantly
Instantly Expert Certified
closed:in The closed:in stack

Every tool we use to
build outbound that closes

The full GTM engineering stack we run for clients, with real monthly cost and our honest take per tool. Hover a tool to learn what we do with it.

Clay
Instantly
Apollo
Close
HubSpot
Claude
n8n
Notion
Findymail
Hunter
LinkedIn
HeyReach
Lemlist
Crossbeam
Apify
Fireflies
ChatGPT
Perplexity
Salesforce
Beehiiv
closed:in
Clay
Orchestration
See the full stack Or the free resource vault
0
Qualified sales meetings per month
0
Of campaigns generate meetings in 2-3 weeks
0
Average reply rate on campaigns

Our clients booked meetings with

B2B companies that trust closed:in

Thomas Scott & Co Thomas Scott & Co Zano Zano Jamezz Jamezz Endresz Endresz Wetaxus Wetaxus Rewize Rewize
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Real results from
real campaigns
Verzendbazen
78 qualified opportunities and 77,951 euro in pipeline. 13.9% reply rate - 2x industry average. Had to hire to handle demand.
0
Opportunities
8 wk
Timeline
13.9%
Reply rate
Endresz
247 boutique conversations across NL, France, Poland and London. USD 128K+ pipeline from a multi-market creative agency rollout.
0
Conversations
4
Markets
$128K
Pipeline
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How we build your
outbound engine

Scroll through our 5-step framework that turns cold outreach into qualified pipeline.

Step 1 of 5
1
ICP
120+ data providers
98% deliverability
10% reply rate
20+ meetings/mo
0
qualified meetings booked
This is what happens when ICP research, data enrichment, technical infrastructure, and personalized outreach come together.
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Who closed:in is for

Four signals you're a fit

B2B SaaS founders

You need predictable demos, not more SDR hires

ACV between EUR 5K and EUR 50K, selling to mid-market. You tried outbound in-house and it took 4 months to get to 5 demos/month. closed:in gets you there in 4 weeks without hiring.

Vertical SaaS Sales tech Fintech
See SaaS approach
Recruitment & PE firms

Your prospects don't reply to generic outreach

PE-focused executive search, buy-side advisory, niche recruitment. Your buyers expect specificity and credibility upfront. closed:in builds outbound that respects their inbox.

PE buy-side Executive search Niche specialists
See GTM engineering
Agencies, e-commerce, services

Your ICP is niche or invisible in standard databases

Hospitality, boutique retail, B2C-to-B2B retail, sustainability, agency-services. ICPs that don't show up cleanly in Apollo. closed:in builds custom sourcing pipelines via Clay.

Custom data sourcing Niche ICP Clay-native
See Clay agency
Financial services, M&A, advisory

Your buyers are senior, skeptical and signal-driven

M&A advisory, corporate finance, asset management, audit, legal-tech, fintech. Your prospects ignore mass outreach but engage with credible, signal-based outbound that respects their seniority.

M&A advisory Corporate finance Audit & legal
See GTM engineering

Other industries we run outbound for: SaaS, manufacturing, IT/MSP, professional services, healthcare, sustainability, hospitality, agencies, e-commerce.

Don't see your space? Talk to us.

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Everything you need for
predictable growth

Predictable Meetings

We turn outbound into a steady flow of qualified calls on your calendar. Measurable, repeatable, and directly tied to revenue. No more hoping for leads.

20+meetings/month
80%book in 2-3 weeks

Deliverability & Infrastructure

Domains, inboxes, warmup, and real-time monitoring set up the right way. We keep your emails in the inbox and out of spam, consistently.

98%deliverability
SPF/DKIMfully configured

Clay Enrichment & Outbound Ops

Clay-based lead enrichment, waterfall sourcing, Claygent personalisation and CRM orchestration. Plus strategy, copy and sequencing handled end-to-end. Your team focuses on closing while we fill the pipeline.

120+data providers via Clay
Clay Partnersolutions certified

Insights & Optimization

Clear reporting and ongoing A/B tests to lift reply rates and meeting quality month over month. Data-driven iteration, not guesswork.

10%avg reply rate
Weeklyoptimization
Testimonials
Don't take our word for it
★★★★★

Working with closed:in was a seamless experience. Their ability to merge outreach with functionality resulted in opportunities that not only filled our pipeline but also converted.

★★★★★

Closed:in delivered exactly what they promised. Within weeks we had a full pipeline of qualified leads and our sales team finally had consistent deal flow to work with. Their approach to outbound is next level.

★★★★★

We tried outbound ourselves for months with minimal results. Closed:in came in, rebuilt everything from scratch, and within 4 weeks we had qualified meetings on the calendar. Absolute game changer for our agency.

FAQ

Questions, answered.

What does closed:in do?
closed:in is a GTM engineering agency in Amsterdam. We build and run outbound sales systems for B2B companies, combining cold email (Instantly), LinkedIn outreach, lead enrichment (Clay), website visitor tracking and CRM orchestration into one managed engine. Most clients see qualified meetings booked within 2-3 weeks.
How is closed:in different from a traditional cold email agency?
Traditional cold email agencies send volume. closed:in is a GTM engineering agency, meaning we build a full outbound system on top of your CRM. That includes enriched, signal-based lead lists via Clay, multi-channel sequences across email and LinkedIn, deliverability infrastructure, and reply handling wired straight into your sales pipeline.
What kind of companies do you work with?
B2B service companies, SaaS founders, recruitment and PE firms, agencies and product companies selling into mid-market and enterprise. Our clients usually have an average contract value of EUR 5K or more and need a predictable, repeatable way to book qualified meetings without hiring an in-house SDR team.
How fast do you deliver results?
Setup of infrastructure takes 2 to 3 weeks (domains, inboxes, warmup, lists, copy, sequences). Most clients get their first qualified meeting within 2-3 weeks of launch. Documented case studies show 78 to 247 opportunities per engagement, with pipeline values between EUR 78K and USD 300K+.
Which tools and platforms does closed:in use?
Core stack: Instantly for cold email, Clay for enrichment and orchestration, Close CRM for pipeline management, Apollo and Sales Navigator for sourcing, and LinkedIn for direct outreach. We are a Clay Solutions Partner, an Instantly Certified Expert and an Apollo Partner.
Where is closed:in based and which regions do you serve?
closed:in is based in Amsterdam, Netherlands. We run campaigns into the Netherlands, Belgium, the United Kingdom and the broader European market, in English, Dutch or other local languages depending on the target country.
How do I get started?
Book a 30 minute discovery call. We'll review your current outbound setup, your ICP and your goals, and confirm whether closed:in is a fit before sending a tailored proposal.

Ready to scale your
outbound?

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The closed:in playbook Free PDF
Cold email infrastructure checklist + weekly tactics from 1,000+ live campaigns.