The AI Era · SaaS killer · Martin Jenšík
Monthly SaaS
fees? Unnecessary.
Bloomreach, Klaviyo, Tableau, Zendesk, Mailchimp... almost everything a company pays a monthly fee for in marketing and BI can be built as your own solution — open source, or custom AI-built (vibecoding). A one-time investment instead of an endless subscription. Your data stays yours, not locked in someone else's platform.
What can be replaced
SaaS monthly → solution onceBloomreach / Exponea / Klaviyomarketing automation, $$$/month
→
Custom AI mailingClaude + Amazon SES, one-time build
Tableau / Power BIper-seat licence, $/month/user
→
Keboola + Looker Studio + AI layerfree-tier tools, ask your data questions in plain language
Zendesk AI / Intercomsupport with AI add-on, $$/month
→
AI chatbot over your own dataanswers from real orders, not generic replies
Mailchimp / ActiveCampaigne-mail platform, $/month
→
Your own e-mail pipelinebuilt and owned by you, no subscription
How it works
vibecoding, not a six-month project1 · AuditWhat you're paying monthly today, why — and whether you actually need the full scope of it.
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2 · DesignWhich combination of open source + AI layer covers the same ground, tailored to your data and processes.
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3 · Building with AIClaude as the main development force — what used to be a week of developer work is now hours to days.
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4 · HandoverThe solution runs on your own server/account, with documentation — you're not locked in to me or to a SaaS platform.
What I'm building right now
work in progress, not a case study
in progress
Multi-tenant AI mailing
A Bloomreach/Exponea replacement for multiple e-commerce brands from one place — Claude for personalisation, Amazon SES for delivery.
in progress
AI audit of marketing scenarios
Reviewing and fixing existing Bloomreach automations — finding bugs and logic nobody ever finished.
Paying for SaaS you don't have to?
Send me the list of tools you pay for monthly for marketing or BI — I'll tell you honestly what's worth replacing and what isn't.