01WebsiteReadyDemo project

LeadFlow

A website for a service business with cost estimation and automated lead handling.

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LeadFlow homepage hero with the headline and service cards — 01Landing page combining services, the cost calculator, and the lead form on one page.↗

LeadFlow cost calculator with a selected service and the resulting price range — 02Picking a service and add-ons instantly recalculates the estimated project cost.↗

03The form carries over the calculator's estimate and submits the lead through server-side validation.↗

04A clear confirmation instead of silence after the form is submitted.↗

05The administrator sees a leads summary without exports or manual counting.↗

LeadFlow admin lead detail with contact info, project, and status — 06Full lead information — contact, chosen service, estimated cost, and status — in one screen.↗

LeadFlow is a demo website with a cost calculator and lead form: server-side processing, stored data, and an instant Telegram notification.

Next.jsTypeScriptSupabaseTelegram APIVercel

01 / THE PROBLEM

What needed to change

Service businesses often lose leads: the client doesn't know the rough cost upfront, and the contact form isn't connected to a database or a notification — new leads get noticed late, by manually checking email.

02 / THE SOLUTION

How the solution works

LeadFlow calculates a rough estimate right on the site, submits the lead through a validated server handler, stores it in Supabase, and instantly notifies the person responsible on Telegram — no manual inbox monitoring.

03 / KEY FEATURES

Key capabilities

Only the capabilities that support the core user journey.

01Service cost calculator
02Lead form with server-side handling and validation
03Leads stored in Supabase
04Telegram notifications for new leads
05Admin interface for reviewing leads

05 / ARCHITECTURE

What happens beneath the interface

The user calculates a rough estimate client-side and submits the lead through a validated server handler. The data is stored in Supabase, then a Telegram notification is sent.

06 / LIMITATIONS

Demo boundaries

—A demo implementation: no real client leads or data are processed.
—The admin interface covers basic lead review, without advanced analytics.

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