Native Windows app · Local & offline

Your correspondence,
finally understood.
Local. Offline. With sources.

DCM Lumina reads your emails and PDFs, sorts automatically and answers questions about your archive — always with source citations.

Native Rust app. Local SQLite. No cloud lock-in, no account.

DCM Lumina open on a desktop PC in a modern home office
The Problem

Sound familiar?

“I can't find anything.”

30 emails a day, 5 subfolders, Outlook search gives up. Last month's invoice from ACME turns into a scavenger hunt.

“I miss deadlines.”

A second-stage dunning notice was buried in an email you never opened. Early-payment discount gone — deadline missed.

“I retype data.”

Invoice number, IBAN, net/gross — copied by hand into DATEV or Excel. Typos guaranteed.

The Solution

How DCM Lumina works

01
ConnectStep 01Connect your IMAP mailbox, choose an AI provider (Fireworks AI, Gemini, OpenAI). Setup in 2 minutes — no account.
02
AI understandsStep 02Extractor pulls invoice numbers, IBANs, amounts and due dates — structured. Validator LLM cross-checks the logic.
03
You ask, Lumina answersStep 03"How much did ACME invoice last year?" — Lumina chat searches your archive and always cites the source.
See for yourself

DCM Lumina in action.

From inbox to searchable archive — in seconds.

Features

Everything included. Nothing superfluous.

01Local-first Architecture

SQLite database and Markdown wiki stay on your PC. No cloud, no telemetry, no account.

02OCR Built In

Scanned letters get the same treatment as digital PDFs. Tesseract integrated, German script first-class.

03Dual AI Verification

Extractor pulls data, validator LLM cross-checks the logic (e.g. gross = net + VAT). A green tick instead of hope.

04Lumina Chat with Sources

Ask anything — answer in seconds, always referencing the original document. Tool-use searches archive plus wiki.

05Workflows & Webhooks

Invoice > €5,000 → accounting + cloud folder. Dunning detected → Slack webhook. Rules trigger actions automatically.

06Deadline Radar

Due dates, early-payment days and dunning levels are extracted and logged. Never miss an early-payment discount again.

07Auto Wiki

A supplier wiki builds itself: every new piece of correspondence adds structured knowledge in open Markdown files.

08Multi-Account IMAP

Multiple inboxes in parallel — business, personal, accountant. Fully automated, cleanly separated.

09Security by Design

Passwords and API keys encrypted via Windows DPAPI. AI provider of your choice — including EU servers.

Made in Germany — for SMEs & private use
100% local — SQLite + Markdown on your PC
DPAPI-encrypted secrets
GDPR-friendly — no cloud lock-in
Pricing

One-time. Clear. Fair.

Per-machine licence. No subscription, no account, no hidden costs.

Start free

DCM Lumina

0 EUR14 days
Then 89 EUR one-time per machine — or simply stop.
  • Full feature set, no restrictions
  • Download link sent immediately by email
  • No credit card, no account
  • Incl. 30 min. personal setup call
  • All updates included
Customisation Workshop

Customisation Workshop

On request
  • 4 hours, 1:1 with Leanofy
  • Define custom document types & workflows
  • Configure accounting export (DATEV, Excel)
  • Webhook integrations (Slack, Teams, Zapier)
  • Ideal for special requirements
Native Windows app · Local & offline

No more Outlook hunts
or copy-pasting data.

14 days free. No account. No risk.

Enter your email → download link arrives instantly.