The Construction Operating System.
From the daywork report on site to the validated e-invoice at your client — field and office work in one app instead of paper slips, Excel and three separate tools.
One day, one company, one system
Scroll through your business — from the morning on site to the market radar. Seven chapters, and in the background the shell building grows along with you.
The day begins on site
The foreman checks off the crew — hours, site and safety briefing in one go.
Lines, hours, photo, the client's signature — recorded in minutes, even with gloves on.
Weather, crew, output, hindrances — the VOB/B documentation writes itself along the way.
By noon the office knows everything
What was recorded on site in the morning shows up as a KPI in the office by noon — without anyone retyping.
Projects, compliance, finance, market: the entire office in one dashboard, configurable per role.
Expiring documents, overdue invoices, thinly staffed sites — OBELISK speaks up before things get expensive.
From report to paid invoice
XRechnung and ZUGFeRD — validated against the official tools (KoSIT, veraPDF), sent in one click, filed in the GoBD-compliant archive.
Five stages under VOB/B with deadlines — no invoice slips through.
The bank statement (CAMT.053) matches payments against open invoices automatically.
Payment forecast, P&L waterfall, liquidity early warning — before things get tight, not after.
Payroll, vacation, posted workers — under control
Attendance becomes timesheets and payroll exports: DATEV LuG/LODAS, Quick-Lohn, Lexware — in the real import formats.
A1, EHIC, crane licence, first aid — the matrix warns 60 days before a document expires.
A new man on site? OBELISK detects it from the attendance and puts the notification on the office's desk — with the responsible customs office (Hauptzollamt).
Scan the ID card — the AI reads the data — and the bilingual employment contract (RO/DE) comes out of the template.
From BoQ to quote — with memory
X83/P83/X81 — every item is imported exactly as it is and returned priced, byte-exact.
Walls, slabs, rebar per diameter — priced the way a shell-construction estimator does.
The AI breaks down and remembers your past quotes — on the next BoQ the shelf suggests your prices.
Cost planning in five stages, benchmarks in €/m² of gross floor area — the language of client and architect.
The chain of evidence builds itself
A documented hindrance, and from it the change order under § 2 VOB/B — an unbroken line from disruption to money.
Hindrance, concerns, defects, acceptance — fill in, tick, send.
The rulebook as an AI knowledge library: ask in plain language, get an answer with its source.
A tagged plan library, pins and markings right on the drawing — attached to tasks, change orders and minutes.
See what the market is doing
Construction time series for 23 countries, a world map, early warning — official sources instead of gut feeling.
Concrete, steel, metals, diesel — Destatis, world markets and fuel-station data, updated automatically.
Ask your system — by text or voice. The agent knows your real company numbers.
The Terminal
What corporations buy from analysts sits here in the same system as your daywork reports: the macro forces that hit your estimating — interest rates, materials, the economy — live from official sources, in terminal style.
- ▸World map with construction KPIs per country — every figure dated, with its source
- ▸War Room, Risk Engine and AI Forecasts — market cockpits all the way to a 3D view
- ▸The AI agent answers questions about your business and the market — grounded in data, by text or voice
Free, no login — the state of the German construction industry as a single number.
This is what OBELISK looks like
Real screenshots from the app — fictional names, real numbers. Click your way through.
The office cockpit
Every site, every number, critical alerts — one screen. The cockpit bundles 48 pages from projects through finance to market & AI, and every role sees exactly the modules it needs.
- ✓KPIs come straight from the field data — no retyping, always current
- ✓Customs, deadline and compliance warnings before they get expensive
- ✓Move and show/hide dashboard widgets — per user
Built on the construction site — not in a software lab
Six answers to the question why OBELISK exists and what it does differently.
OBELISK began as the daywork-report app of a shell-construction company: a foreman was supposed to record the daily hours so the office could invoice them. It grew into a complete operating system — because every recorded hour raises questions the system can answer right away: Who worked? Where? With what? What did it really cost? Every feature in OBELISK exists because it was missing on a real construction site — not because a product manager dreamed it up.
Four roles, one system
Everyone in the company sees exactly what they need — from the site container to the boss's desk.
You see the business — not just number graveyards
Cash-flow forecast, P&L waterfall, productivity per site, open items with a due-date traffic light: the cockpit shows you where the business stands in two minutes each morning. Early warnings arrive before things get expensive — expiring documents, unpaid invoices, thinly staffed sites. And when you have a question, ask the AI agent that knows your real numbers.
An operating system, not a toolbox
What's entered on site is never typed again: the same record becomes the invoice, the payroll, the proof and the KPI.
Daywork hours, change orders, deadlines, warranty — OBELISK documents and reminds you before an oversight becomes missing money.
From the first daywork report to estimating entire projects: modules join when you need them — roles and permissions in one click.
The complete toolbox
No brochure excerpt — this is every module. Pick a group, expand a module and read what it really does.
each with code, party, construction phase and legal basis (57 for minutes, 38 in the dispute manager)
VOB A/B/C complete (6,770), the entire BGB §§ 1–2385 (4,759), commentaries and 46 VOB/C DIN standards; every answer with its exact source
every series with its source, true start year (oldest: 1926) and control value
externally validated (KoSIT 'Validation successful', veraPDF PASS) with a blocking CI validation gate on every deploy
to the original import specification, importable at the payroll office without rework
E-invoices are validated with the official tools (KoSIT validator, veraPDF) · Payroll and DATEV exports follow the real import specifications · Site diary and template letters follow VOB/B · GDPR compliant, hosted in the EU.
From the site. For the site.
OBELISK is not the product of a software company that knows construction sites only from photos. It was built by an estimator and site manager from shell-construction practice — for his own working day, against his own paper slips, Excel lists and evening phone calls. Every feature exists because it was missing on a real site: from the daywork report that has to become money, to the estimating that remembers old prices. That is why OBELISK speaks the language of construction — not the language of consultants.
Paper today. OBELISK tomorrow.
Try it for free — creating your company takes two minutes.
Start for free →Get to know OBELISK
Write to us — we reply personally, usually the same day. No sales hotline, no call center: you talk to the people who build OBELISK.
- Free consultation: together we check whether OBELISK fits your company
- Live demo on screen — with your workflows, not slides
- Help getting started: create your company, invite the team, first site
- Answers from practitioners who estimate and invoice themselves
- During the pilot phase: everything free, no commitment
Or directly: kontakt@obelisk-os.de