KryStack — You own the stack. I run the servers.

01 Why you haven't done it yet

The real blocker

You're not missing tools. You're missing an operator.

Open-source software is free and anyone can download it. But downloading it is where the work starts, not where it ends.

Bare software, not running

A downloaded n8n or CRM is just files. Someone has to spin up the VPS, configure it, secure it and connect it before your team can use a thing.

Setup isn't the end of it

Servers need patching, updates, backups and uptime monitoring every single day. Neglect it for a few weeks and you lose data or the system dies mid-workday.

Hiring DevOps is overkill

An in-house engineer runs $600 to $1,200 a month. A 5 to 15 person agency doesn't need that, and can't justify it, for something that runs in the background.

I'm that operator, on a monthly retainer.

Far cheaper than a full-time hire, and you still own the entire system.

03 The hard part · I handle it

Self-hosted, run for you

The tools I deploy and run for you

18 open-source apps that replace expensive SaaS, each one needing a server to run. You don't need them all. I pick the right ones for your size and the way you work.

Core, the ones I deploy first Extended, added as you grow

n8n Core

Automate repetitive work, wire forms, CRM, email and ads together. AI nodes built in.

replaces Zapier · Make

Mautic

Nurture leads automatically: behaviour-based email flows, lead scoring, multi-channel campaigns.

replaces HubSpot · ActiveCampaign

Listmonk Core

Send newsletters and campaigns in bulk, far cheaper than paying per contact.

replaces Mailchimp · Brevo

Postiz

Schedule and publish to FB, IG, TikTok and LinkedIn, with AI content suggestions.

replaces Buffer · Hootsuite

Mixpost

Social scheduling for multiple brands or clients on a single dashboard.

replaces Later · Buffer

Twenty Core

A modern CRM for contacts, deals and pipelines. Hook it to Telegram for instant lead alerts.

replaces Salesforce · HubSpot

EspoCRM

A mature CRM with many built-in modules for teams that need a tighter sales process.

replaces Zoho · Pipedrive

Umami Core

Lightweight, privacy-friendly traffic stats with no annoying cookie banner.

replaces Google Analytics

Matomo

Full-featured analytics: heatmaps, funnels, 100% of the data kept on your server.

replaces GA360 · Adobe

Plausible

A single, ultra-light dashboard that non-technical clients can actually read.

replaces Google Analytics

PostHog

Track in-app behaviour: funnels, retention and session replays.

replaces Mixpanel · Amplitude

Metabase Core

Drag-and-drop dashboards for revenue, ad spend and leads by source. Reports send themselves.

replaces Looker · Tableau

Superset

Heavy-duty BI for large datasets and many chart types. When Metabase isn't enough.

replaces Tableau · Power BI

Chatwoot Core

Website live chat plus a single inbox for Facebook, email and WhatsApp. Chatbot included.

replaces Intercom · Zendesk

Formbricks

Build forms and surveys, capture leads, push them straight into your CRM or n8n.

replaces Typeform

Dub

Branded short links that count clicks and track the conversion source of each campaign.

replaces Bitly

Cal.com

A booking page for clients to grab demo slots, synced to Google Calendar with reminders.

replaces Calendly

Penpot

Collaborative UI and banner design for your team. The free tier covers most internal work.

replaces Figma

💡

More tools doesn't mean deploy them all. Over-provisioning wastes RAM and ops time, and it just confuses your team. I start with the three that free up the most hours, then expand when you actually need it.

How I work with you

Four steps, and you don't touch the technical side at any of them.

15-min call

I map the right stack for your size and budget. No selling you things you don't need.

You own the VPS

You buy the VPS, I advise on which plan. The server is in your name, never locked to me.

I build it all

Install, harden, configure, connect, back up. A few days later you log in and it just works.

I keep it running

Monthly monitoring 24/7, backups, patches, uptime. A 2am crash is mine to fix, not yours.

06 Bespoke, not boilerplate

Built around your operation

I don't sell templates. I build the workflow your team is missing.

Generic Zapier recipes won't move the needle. I look at how your agency actually runs, your tools, your projects, where the hours leak, then build and maintain the automation that removes that specific bottleneck.

Audit

We walk through your current projects and stack. I map exactly where your team loses hours every week.

Build

I design and build the automation on your own server. Tested, documented, and fully yours to keep.

Maintain

I keep it alive as APIs and tools change, so it never breaks silently in the background.

Builds that usually pay for themselves first

Automated ad reporting

from ₫3M · AI commentary from ₫5M

"End of every month, the whole team stops to assemble client reports."

Pulls Meta and Google Ads daily, pre-computes CPL, ROAS and CTR into a live dashboard, and emails or Telegrams each client their report on schedule.

Lead to rep in 60s

from ₫3M

"A lead fills the form at 11pm, we call at 9am, and they're already gone."

Facebook and web-form leads flow straight into your CRM, ping a rep on Telegram or Zalo instantly, and auto-assign an owner. No lead slips through.

One piece, a week of posts

from ₫3M

"We write one long piece, then chop it into a dozen posts by hand."

Drop in one long-form piece, AI splits it into posts for Facebook, LinkedIn and TikTok in your brand voice, then schedules them. Write once, publish all week.

Unified inbox + AI triage

from ₫4M

"Messages are scattered across five pages and email, so things slip."

Pull messages from many pages, email and the website into one inbox. AI tags each by request type and drafts a reply so the team closes faster.

These are examples. Your build starts from whatever the audit turns up. Run two or more and I fold them into the ops retainer so they cost less than one-offs.

Book a free workflow audit

A 15-minute call where I look at how your team works today and point out the one or two automations worth building first. No charge, no obligation.

Book the audit →

08 Pricing

Advisory, not fixed menu

A starting point, not a rigid quote

Every agency needs a different stack. These are three reference tiers; I lock the right one in after a 15-minute call. All three already include full VPS setup and management, the exact part you're stuck on.

Starter

The three tools that free up the most agency time: automation, reporting, client management.

Setup from ₫5MOps from ₫3M / month

Full VPS setup & management
n8n, Metabase, Twenty
Backups + monitoring + patching
Support over Telegram

Start here

Best fit for agencies

Growth

Enough to run marketing and care for clients: adds email, analytics and a multi-channel inbox.

Setup from ₫7MOps from ₫3.5M / month

Prepay & save3 mo −5% · 6 mo −10% · 12 mo −20%

Full VPS setup & management
Everything in Starter
Adds Listmonk, Umami, Chatwoot
One small change per month

Choose Growth

Full

A custom stack built to your needs with priority support. For agencies running many clients.

Setup from ₫12MOps from ₫5M / month

Prepay & save3 mo −5% · 6 mo −10% · 12 mo −20%

Full VPS setup & management
Custom stack from the 18-tool catalog
Everything in Growth
Priority incident handling

Talk through needs

The monthly retainer covers: VPS setup and management, 24/7 monitoring, daily off-site backups, updates and patching, email deliverability, and incident handling. You pay the VPS provider directly and own that server; I just advise on the right plan. The prices above are a starting point, locked in once I understand your needs. Prepay discounts on the monthly ops fee apply to Growth and Full: 3 months −5%, 6 months −10%, 12 months −20%. VAT invoice available. (₫ = VND, M = million.)

09 FAQ

Common questions

The things agencies ask first

Anything not covered here, the 15-minute call clears up.

I'm not technical. Do I ever have to touch the server?

No. You just log in and use the interface like any other app. The VPS, command line, configuration and backups are all on me. You never open a terminal.

Why a monthly ops fee?

Because a server isn't set-and-forget. It needs updates, patches, backups and constant monitoring so it doesn't die mid-workday or lose data. The retainer is far cheaper than an in-house engineer, and you still have someone on call.

Is using open-source legal?

Completely. This is free software, licensed for business use and customization. I charge for the technical setup and operations, not for a software license.

Is open-source worse than the paid tools?

For most small-agency needs, no. These tools are mature and run at large companies. A few advanced features differ, and I'll tell you straight before you decide.

Whose server is it, mine or yours?

Yours. The VPS is in your name and you pay the provider directly. I'm only the operator. Stop anytime and I hand over the full server and data.

What if the system breaks?

There's 24/7 monitoring and daily backups. When something goes wrong I handle it per the commitment in the contract. That's exactly what the ops fee buys.