Outbound Email
Personalised cold email from our own warmed domains. Replies land qualified in your CRM.
AI-native outbound agency
ColdComplex runs your cold outbound end to end. We find the right buyers at your target accounts using live signals and AI, get into their inbox with email and LinkedIn, and drop qualified leads straight into your CRM. You just close them.
We book meetings with qualified personas at your target accounts, from SMB to Fortune 500: Heineken, Booking.com, KLM, ING. Always verified emails, always in the inbox. We don't play volume games. A sharp niche list or a big one, we hold a high reply rate either way.
Trusted by ambitious B2B teams across SaaS, agencies and professional services
01How it works
Not a one-off blast. A process we have refined over years, run the same way every time and improved every week. From plan to qualified pipeline you own.
02How we work
Every engagement starts as a four-month pilot: we build, launch, scale, then decide together what comes next. It runs from €3,000 per month, set to your scope: volume, channels and complexity.
Domains, warmup, ICP and target list, messaging. Your sending system is set up properly.
The first campaign goes live and the first qualified replies start landing in your CRM.
Volume grows and we optimize every week. Meetings book and pipeline builds.
We review the pipeline added together and make the call. The path forward forks from here.
The numbers are there. We move into a six-month partnership and scale what works, across more segments and channels.
We migrate every account and document a full playbook, then train your team. You run it in-house. Handover fee on request.
We stay on as a light monthly advisor. You run it day to day, we keep the strategy and setup sharp.
Not a fit? We part ways with a clean cutover. You keep a copy of the lead list.
03Services
Outbound email, LinkedIn and GTM engineering add qualified pipeline and revenue. A tool audit cuts what you overspend on your stack. Measured, documented, and yours to keep.
Personalised cold email from our own warmed domains. Replies land qualified in your CRM.
Profile, content and outreach in one weekly rhythm, so the right accounts see you and your network fills with real buyers.
The system underneath everything you sell with. CRM, pipelines, dashboards and automation, handed to your team.
04Signals
AI-driven execution, human curation. We watch the signals that mean a company is ready, and reach them in the window that matters.
Right account, right person, right moment.
05Why ColdComplex
ColdComplex is run by people who have sold and built GTM systems for 15+ years. That judgment goes into your outbound: the right angle, the right buyer, the right message. Not a junior pulling a template.
We move fast and stay transparent. Domains warmed, playbook ready, first campaign out in weeks and meetings landing early. No three-month ramp.
If your email lands in spam, none of it works. We send from our own warmed look-alike domains, refined over years, and watch placement daily. You reach the inbox; your main domain stays clean.
Qualified replies land in your CRM and pipeline builds in a dashboard you own. We report one number that matters: pipeline added.
06Who it is for
We can reach 100 buyers or a million. From a tight named-account list to a whole market, the use case changes, the approach does not. It works best when you have a sales team ready to pick the leads up.
You need pipeline now, but hiring a full SDR team is too early and too slow. We are your outbound team, built and run for you, live in weeks.
You have the people to close: a VP, AEs, SDRs. We keep their calendar full with qualified meetings, without the cost of more headcount, tools and babysitting deliverability.
If you can name your buyers (founders, HR, revenue, IT) at companies you can list, we can reach them.
From your first pipeline to the C-suite at the largest organisations. The size of the logo is not the barrier. Relevance is.
07Case studies
18 engagements from startup to enterprise, €8M+ in pipeline behind them. Every number real and referable. A selection below.
Reaching decision-makers, the C-suite and senior stakeholders at companies such asHeineken · ASML · Booking.com · KLM · ING · ABN AMRO · Nikon · Philips · Adyen · Rabobank
Netherlands A stalled C-suite event, filled: 140+ senior leaders attending.
UK · Netherlands €1M+ pipeline influenced across a three-year partnership.
Netherlands ~40% of every secondary school in the Netherlands replied.
Netherlands 25% reply rate and ~€600K pipeline for a niche, design-led product.
€2.4M qualified pipeline in the first 3 months.
€2.6M pipeline from a handful of the right conversations.
Every number here is real and referable. We'll put you in touch with the client on request.
Testimonials
Real teams, real pipeline. Measured and documented, every step.
Sixty demos and over half a million in pipeline in our first 90 days, off one clean data set instead of paying for it twice.
We outsource outreach for a living, and they still cleared our own bar: €2.4M in qualified pipeline.
Seven retainers in 90 days, and I own the system instead of renting leads.
Nobody could get us past the filters in our category until these guys did, $1.1M in pipeline.
They actually understood enterprise: €2.6M in pipeline from a handful of the right conversations.
I'd written off cold outbound, and now my sales team is busy with pre-qualified appointments.
110 demos and around $520K in ARR pipeline, and they reached actual decision-makers, not front desks.
08Software
We set it up properly, document it, and hand it over. You keep every account and every workflow.
09Free tool
Enter your work email. We check your domain's MX, SPF, DKIM and DMARC live and score how ready it is for cold outbound. Instant, no call, no signup.
10Resources
No call, no commitment. Two real, useful things we'll do for you for free, so you can judge the work before you pay.
Give us one prospect, a name and their company, and we return them fully enriched: verified work email, direct phone and LinkedIn.
Enrich a prospect → Free sampleTell us who you sell to and we send twenty real, enriched prospects from your market. Judge the list yourself, before you commit to anything.
Get my sample prospects →FAQ
The first four weeks are build weeks: domains, warmup, targeting and copy. First replies usually land in week three to five, and volume grows from there.
Yes, for targeted, relevant B2B outreach with a clear opt-out. We use verified business data and clean unsubscribe flows.
No. We use separate look-alike sending domains, warmed up carefully. Your main domain and reputation are never at risk.
Half a day for the kick-off session and input on your audience. CRM access is optional, depending on the scope and what you want. We build and manage the rest.
Scope sets the price: your sending volume, how many channels you run, and how much CRM and multi-threading it takes. It runs from €3,000 per month and scales from there, usually as a four-month pilot. That is a fraction of the pipeline it builds, and you get a fixed number after a short scoping call. No hourly billing.
Nothing automatic, and no lock-in. At month four we review the pipeline added together and decide the path: scale it up, keep it steady, hand it to your team with the full playbook, or stop. You own every domain, list and system from the pilot either way. Most teams continue, because by then the pipeline speaks for itself.
Go-to-market, or GTM, is simply how a company sells: who you target, the channels you reach them through, the message, and the systems that tie it together. When we say we run your GTM, we mean we build and operate everything that sells for you, not just send a few emails.
Revenue operations, or RevOps, is the plumbing behind sales and marketing: the CRM, the data, the routing and the reporting. It makes sure every lead is tracked, every reply lands in the right place, and you can see what is working. We set this up so your pipeline is measurable, not a black box.
Your ideal customer profile, or ICP, is a clear description of the companies and people most likely to buy: their industry, size, role and the signals that show they are ready. We build the target list from your ICP, so outreach goes to the right accounts, not to everyone.
Inbound is when buyers come to you, through your website, content or ads. Outbound is when you reach out first, to the specific accounts you want. We run outbound, cold email and LinkedIn, so you are not waiting for the right buyer to find you.
Deliverability is whether your emails actually reach the inbox instead of the spam folder. It depends on warmed domains, clean lists and sensible sending habits. We manage all of it, on separate look-alike domains, so your main domain and reputation stay safe.
Yes. We work just as well with a tight list of named accounts as with a broad market. If you have fifty dream companies, we map the right people inside each one and run a precise, high-touch campaign. Small and specific is often where outbound performs best.
Yes. A small or niche market is an advantage, not a limit. We map and track every account and every persona in your space, so we can run a hyper-personalised approach to each one, with research and messaging built for that exact buyer. The narrower the focus, the sharper the outreach.
Start with a half-day working session. You leave with a target list, a plan to measure it, and early wins, whatever you decide next.
Contact
Tell us about your pipeline and what you want to fix. The team reads every request and gets back to you within eight hours.