Trusted by operators at
The Retention Engine
$3,000/month or $15,000 for 6-month prepay (one month free). I turn your owned audience into a retention layer: weekly long-form Substack, weekly Kit check-in email, Substack Notes, segmentation logic, and lifecycle routing for buyers who are not ready today.
Built for Series A B2B AI SaaS teams with a list, a technical market, and too many subscribers silently aging out of pipeline memory.
Currently retaining 5 founders on the Retention Engine.
Trusted by operators at
02 : The Dormant Revenue Layer
Most SaaS teams think of Substack as content. Buyers experience it as memory. When that memory is weak, expansion, reactivation, and referral conversations happen too late.
They joined for a reason. Then the publication went quiet, generic, or too founder-update heavy, so the buyer stopped rehearsing the problem.
Product launches and company news do not create retention by themselves. A technical buyer needs frameworks, playbooks, and reasons to keep returning.
Clicks, replies, notes, and repeated reads are pipeline signals. Without segmentation and routing, those signals never reach the lifecycle or sales motion.
The Retention Engine turns Substack into an owned-media layer that keeps the market educated between buying windows, surfaces intent before it goes cold, and makes existing attention worth more.
03 : The Mechanism
The mechanism is simple: teach the market every week, segment the attention, and route the intent while the buyer still remembers why the problem matters.
Step 01
Audience Audit
I map subscriber source, engagement depth, dormant cohorts, current lifecycle logic, and the topics already pulling attention.
Step 02
Retention Thesis
The publication gets a clear editorial spine: the recurring problems, playbooks, and category beliefs that keep buyers close between purchase windows.
Step 03
Weekly Flagship
Each week, one long-form Substack piece teaches the market with enough depth to be saved, forwarded, and referenced in sales conversations.
Step 04
Lifecycle Check-In
A Kit email routes the best idea back into the list with segmentation hooks, reply prompts, and buyer-intent signals.
Step 05
Community Surface
Substack Notes keep the publication alive between essays and turn lightweight engagement into repeat exposure.
04 : THE DELIVERABLES
These are the deliverables inside the $3,000/month Retention Engine.
01
Weekly long-form essays that turn your category knowledge into useful frameworks buyers can save and forward internally.
02
Subscriber segments built around clicks, replies, repeated reads, topic interest, and buying-window signals.
03
The Substack editorial system plus Kit check-in layer, designed to keep attention alive and measurable.
04
Focused broadcasts that move engaged subscribers toward demo, sales, migration, expansion, or customer education moments.
05
Substack Notes and reply prompts that surface the subscribers worth routing into a human conversation.
06
Retention-oriented lifecycle drips for dormant, active, customer, and expansion-ready audience segments.
This is not a newsletter contractor, ConvertKit consulting, or content strategy decks. It's the owned-media retention layer running every week.
05 : Proof
A subscriber keeps reading when the work teaches like an expert and sounds like someone worth trusting. The public proof shows voice capture, technical translation, and sales psychology. The private proof stays locked.
Revenue
"Sebastian is a sage at his craft, just as I am at mine. He is always contributing with insight in the Sales Rocket Mastermind."
Doru Pelivan
Founder
eduKIWI (8-figure EdTech)
Growth
"Sebastian captured exactly the thinking style and writing voice I was looking for. My Udemy courses increased ratings from 4.6 to 4.8."
Jonas Schmedtmann
Instructor
Udemy
Engineering
"Sebastian is obviously a highly skilled and knowledgeable web developer. He delivered one of our biggest projects in just the right amount of time."
Martin Aranovitch
Manager
WPMU Dev
Tech
"I trust in Sebastian's great work ethic and capacity. Communicating with him is always straightforward."
Andrew Radulescu
CEO
Tribus Technologies
Strategy
"Sebastian has achieved some of the best show-up rates on my sales team. A very professional voice."
Roxana Borz
7-figure Coach
Manifestation Academy
When the memory layer compounds, dormant attention becomes retrievable revenue.
06 : Retention Math
The Retention Engine makes dormant attention visible again. The goal is not more content. The goal is more retained memory, more qualified replies, and fewer lost buying windows.
Illustrative dashboard. Live results vary by list quality, customer base, product category, and historical trust.
07 : Investment
A monthly retainer for founders who already paid to earn attention and want that attention to keep doing revenue work.
The Retention Engine
BOOK A 30-MIN REVIEW OF YOUR OWNED-AUDIENCE LEAK →BUNDLE OPTION
Stack the Retention Engine with the Authority Engine and the work becomes a single $5,000/month retainer — or $25,000 for a 6-month prepay. That's $11,000 less than taking both retainers month-to-month.
→ Learn about the Authority Engine08 : Frequently Asked Questions
The Retention Engine gives you a monthly owned-media operating layer: weekly long-form Substack, weekly Kit check-in email, Substack Notes, segmentation logic, and lifecycle routing.
The work is built around buyer memory. Each month should make the list warmer, clearer, and easier to route when subscribers show intent.
It integrates with the tools already in the system. Substack becomes the long-form publication and community surface. Kit becomes the check-in, segmentation, and lifecycle layer.
If your current newsletter already lives somewhere else, I can adapt the architecture. The important part is not the software label. The important part is that owned attention gets taught, segmented, and routed.
A larger list gives more room for reactivation, but list quality matters more than raw size. A few thousand ICP-fit subscribers can outperform a much larger audience that never had buying relevance.
If the list is tiny or mostly unqualified, I will say so. In that case, the Authority Engine or Distribution Architecture may be the better first move.
You do. The essays, check-ins, segmentation logic, and lifecycle assets are built for your publication and your systems.
I keep process knowledge and anonymized lessons. I do not reuse your proprietary frameworks, customer stories, internal claims, or founder voice for another client.
I look at dormant subscriber reactivation, repeated reads, qualified replies, subscriber-to-call movement, topic pull, customer education usage, and expansion-adjacent conversations.
Substack is not a direct-response ad unit. It is a trust and memory layer. ROI shows up when buying windows stay warm instead of resetting from zero.
Yes. Stacking the Retention Engine and the Authority Engine into Full-Stack Ghostwriting brings the combined retainer to $5,000/month, or $25,000 with a 6-month prepay. That saves $11,000 vs. taking both individually on a monthly basis. You also get one operator on both surfaces — same voice across LinkedIn, X, Substack, and Kit — which is the real reason most founders bundle.
09 : Book The Consultation
Bring your Substack, list size, Kit setup, recent newsletters, and the customer segments that matter most. I will show you where attention is going dormant and what the first month should teach.
BOOK A 30-MIN REVIEW OF YOUR OWNED-AUDIENCE LEAK →30 minutes. No pitch. Just the retention diagnosis.