For B2B companies doing $100K+/mo
You don't need more “interested” contacts. You need qualified calls with buyers ready to buy. That's all we do.
We've connected our clients with
Case StudyMeeting booked with Microsoft's enterprise IT org
Multi-channel outbound into a Fortune-50 buying committee - a qualified intro inside 6 weeks.
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Case StudyQualified meeting with a DaVita operations director
Compliance-safe healthcare outreach - booked with zero deliverability issues.
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Case StudyMeeting booked with a Visa partnerships lead
Targeted outbound into financial services - a qualified intro with a senior decision-maker.
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Case StudyMeeting booked with Microsoft's enterprise IT org
Multi-channel outbound into a Fortune-50 buying committee - a qualified intro inside 6 weeks.
View case study →Case StudyQualified meeting with a DaVita operations director
Compliance-safe healthcare outreach - booked with zero deliverability issues.
View case study →Case StudyMeeting booked with a Visa partnerships lead
Targeted outbound into financial services - a qualified intro with a senior decision-maker.
View case study →
Case StudyDiscovery call set with an AECOM division head
ABM into infrastructure & engineering - booked a meeting on a major program.
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Case StudyMeeting set with a JPMorgan Chase VP
Signal-based targeting into capital markets - a booked call with a senior decision-maker.
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Case StudyDiscovery call booked with J.B. Hunt
A logistics-focused sequence reached an operations exec in 4 weeks.
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Case StudyDiscovery call set with an AECOM division head
ABM into infrastructure & engineering - booked a meeting on a major program.
View case study →Case StudyMeeting set with a JPMorgan Chase VP
Signal-based targeting into capital markets - a booked call with a senior decision-maker.
View case study →Case StudyDiscovery call booked with J.B. Hunt
A logistics-focused sequence reached an operations exec in 4 weeks.
View case study →Most agencies run one play. We run three in sync - so the meetings land while your competitors are still “following up.”
We run personalized email campaigns that land you in front of decision-makers at scale - and book the ones ready to talk.
We work your buyers on LinkedIn where they already spend their day - warming them up before the call is ever booked.
The channel everyone's too afraid to run. We pick up the phone and close the loop - straight to a booked call.
The Stone Haven B2B Engine
From first intent signal to a booked call: the full outbound & inbound stack we run for enterprise clients.
Email, LinkedIn, and cold calling working together - not one channel and hope. That's why our meetings actually land.
You get a dedicated client dashboard where you can track every campaign, every reply, and every booked call - in real time, whenever you want.
We run a constantly-updated stack of the best outbound tools, so you always reach buyers with the sharpest tech available.
Most agencies take weeks to launch. We're sending within three days of kickoff.
Tight ICP definition, accurate sourcing, and clean enrichment - so you only reach real, in-market buyers.
Live weekly dashboards: deliverability, engagement, pipeline, infrastructure health. You see everything.
Our customer stories
Sector by sector, the same outbound acquisition system - installed for capital markets, defense, AgTech, enterprise technology and more.
$1M+Case studyA mid-market B2B SaaS company was booking 3-4 meetings a month and burning its corporate domain reputation. Stone Haven moved all cold sending onto isolated infrastructure and scaled to 120,000 emails a month, 72 meetings, and $1M+ in new ARR over six months. Here is the exact build.
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$40M+Case studyA boutique capital advisory firm was capped by warm intros, booking 3 to 4 institutional conversations a month. In 15 months Stone Haven built an outbound engine that secured $40M+ in mandate pipeline, 95+ qualified opportunities, and 2.3x larger average mandates. Here is the system.
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$38M+Case studyA US defense supplier went from incumbency-capped renewals to 85+ qualified program opportunities and $38M+ in tracked pipeline in six months. See the exact deliverability-first outbound system Stone Haven built.
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$31M+Case studyA tier-one aerospace and defense supplier was invisible to new OEM program offices until shortlists were already set. Stone Haven built isolated outreach infrastructure that generated $31M+ in active program pipeline, 42+ qualified opportunities, and 3.1× pipeline growth in six months.
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$36M+Case studyA trusted AgTech platform was stuck running on pilots, grants, and distributor intros. In 90 days Stone Haven built a repeatable enterprise outbound engine that secured $36M+ in pipeline, 165+ qualified cooperative and distributor accounts, and tripled average contract value. Here is the exact system.
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$54M+New business depended on legacy supplier relationships and slow RFP cycles, limiting access to next-generation vehicle platforms and emerging EV programs.
Read MoreProven results across 158 industries.
Hour 24: you’re onboarded. Hour 48: your copy is written and your ICP is locked. Hour 72: your first campaign is live. No six-week ramp - you’re sending in three days.
The meetings land. Discovery calls, demos and intros with real decision-makers show up on your calendar - booked, confirmed, and ready while you focus on closing.
Once we know what’s converting, we scale it - more volume, more channels, more of the segments that book. 10+ campaigns run in parallel and your pipeline grows on what’s already proven.
At Day 90, we sit down for a full performance review - pipeline created, cost per booked call, and how each channel contributed. If results are strong, we move into a partnership. If not, you keep the playbook, assets, and a working system.
Kickoff call, goals set, systems connected.
Angles written, sequences built, list finalized.
Inboxes warm, sending starts, replies begin.
Real names. Real wins. — what founders say after working with us.
REACHED 1297 LEADS and 149 REPLIED and 31 SHOWED REAL INTEREST. We were skeptical about cold email after getting burned by a previous vendor who destroyed dozens of our domains, but Maildeck's 20.8% positive reply rate proved us wrong. Their warmup system actually works.
we used to obsess over opens. with maildeck we mostly watch replies, bounces and how many calls land on the calendar. around 180–200k sends a month, 3-5% replies HUMAN!, nothing crazy. but it’s stable, and their infra guys ping us before things break, not after.
We blew up hundreds of domains last year sending pretty HTML newsletters as ‘cold outreach’. Maildeck made us strip everything back to 1–2 line, plain‑text notes and 3-5 cold emails per inbox per day. Felt underpowered at first, until we realized we were actually booking more discovery calls from half the volume.
Cyber clients are allergic to spammy tools, so we were cautious. Maildeck started us with slow warmup, rigid verification, and zero tracking or links. We hover around 6% reply rate on 10–12k sends/month, but the important part is we haven’t had a single tenant locked or reputation fire drill since switching.
We tested three sequences - 81k, 42k, and 62k emails. The middle campaign crushed it: 11% reply rate, +45% positive responses. Maildeck's team helped us dial in the messaging for each segment. No more spray and pray.
Data enrichment agency here. Honestly thought tools didn’t matter, only lists. Turns out infra + rules matter a lot when Outlook is watching everything. We send around 500k cold emails over multiple tenants got around 5% reply rates +40% positive replies, $300k/mo in the pipeline in first two months bounce under 1.5%.
REACHED 1297 LEADS and 149 REPLIED and 31 SHOWED REAL INTEREST. We were skeptical about cold email after getting burned by a previous vendor who destroyed dozens of our domains, but Maildeck's 20.8% positive reply rate proved us wrong. Their warmup system actually works.
we used to obsess over opens. with maildeck we mostly watch replies, bounces and how many calls land on the calendar. around 180–200k sends a month, 3-5% replies HUMAN!, nothing crazy. but it’s stable, and their infra guys ping us before things break, not after.
We blew up hundreds of domains last year sending pretty HTML newsletters as ‘cold outreach’. Maildeck made us strip everything back to 1–2 line, plain‑text notes and 3-5 cold emails per inbox per day. Felt underpowered at first, until we realized we were actually booking more discovery calls from half the volume.
Cyber clients are allergic to spammy tools, so we were cautious. Maildeck started us with slow warmup, rigid verification, and zero tracking or links. We hover around 6% reply rate on 10–12k sends/month, but the important part is we haven’t had a single tenant locked or reputation fire drill since switching.
We tested three sequences - 81k, 42k, and 62k emails. The middle campaign crushed it: 11% reply rate, +45% positive responses. Maildeck's team helped us dial in the messaging for each segment. No more spray and pray.
Data enrichment agency here. Honestly thought tools didn’t matter, only lists. Turns out infra + rules matter a lot when Outlook is watching everything. We send around 500k cold emails over multiple tenants got around 5% reply rates +40% positive replies, $300k/mo in the pipeline in first two months bounce under 1.5%.
We manage outbound for a mix of agencies, consultants and SaaS founders. Maildeck’s whole ‘TAM + angle first, then scale’ thing forced us to stop guessing. Now we stagger tests, track repl to positive to call for each angle, and only ramp what proves itself. We sit a bit above 850k sends/month, but it never feels reckless because each inbox is throttled and watched.
Started small to test the waters (50k emails). Got 147 positive replies Gave us confidence to scale up to our big 200k campaign next, can’t wait to go even higher. Sabo's team really understands gradual scaling.
163,085 emails. 10,981 replies. 4,742 interested prospects. those are the numbers from our last 10 days. the reply rate sits at 6.73% which might not sound huge but when you're doing volume like this it's a FLOOD of conversations. bounce rate stayed at 1.31% the whole time. maildeck's infrastructure is legit.
Two months, 246,263 emails sent, 2,479 replies (5.38% rate), 1,280 marked as interested (51.64% of replies were positive). Only 2569 bounces across the entire 60-day period. This is sustainable outbound - not the burn-and-churn approach we dealt with before.
12k leads reached. 1,697 unique replies. 831 positive responses. that's a +5% reply rate and +45% of replies were interested. we've been running this for a quarter now and our domains are still healthy. Sabo and his team really set our infrastructure up like its their own.
Small team, needed big results. Under 10k emails out, +500 replies, more than 200 interested of MailDeck helped us punch way above our weight class without needing a huge SDR team.
We manage outbound for a mix of agencies, consultants and SaaS founders. Maildeck’s whole ‘TAM + angle first, then scale’ thing forced us to stop guessing. Now we stagger tests, track repl to positive to call for each angle, and only ramp what proves itself. We sit a bit above 850k sends/month, but it never feels reckless because each inbox is throttled and watched.
Started small to test the waters (50k emails). Got 147 positive replies Gave us confidence to scale up to our big 200k campaign next, can’t wait to go even higher. Sabo's team really understands gradual scaling.
163,085 emails. 10,981 replies. 4,742 interested prospects. those are the numbers from our last 10 days. the reply rate sits at 6.73% which might not sound huge but when you're doing volume like this it's a FLOOD of conversations. bounce rate stayed at 1.31% the whole time. maildeck's infrastructure is legit.
Two months, 246,263 emails sent, 2,479 replies (5.38% rate), 1,280 marked as interested (51.64% of replies were positive). Only 2569 bounces across the entire 60-day period. This is sustainable outbound - not the burn-and-churn approach we dealt with before.
12k leads reached. 1,697 unique replies. 831 positive responses. that's a +5% reply rate and +45% of replies were interested. we've been running this for a quarter now and our domains are still healthy. Sabo and his team really set our infrastructure up like its their own.
Small team, needed big results. Under 10k emails out, +500 replies, more than 200 interested of MailDeck helped us punch way above our weight class without needing a huge SDR team.
Everything you need to know
The people behind your pipeline
We don't hand your account to a junior - every campaign is run by the strategists, operators and builders you can meet in person.
Schedule a complimentary consultation with a member of our team to see if you're a good fit for our service.
We only work with serious, committed partners. Limited engagements available.
