PROTTOBau
EN / DE
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The AI construction assistant

Stay on top of site conversations
before they get costly.

A project assistant that records trade conversations on site and prepares compliant protocols — followed by an Intelligence check against your project documents that flags deviations early.

App Store Google Play The app · iOS & Android

Built to cut
site costs

Every miscommunication has a price tag

"Rework, delays, missing documentation, unclear instructions — they don't just slow your site down, they cost you money. PROTTOBau captures every conversation, structures every report, and makes sure nothing gets lost between the site and the office. Less mistakes, less rework, less cost."

A site brings together many trades and many languages. Instructions get translated on the fly and remembered differently by everyone. PROTTOBau hears each person in their own language and writes one protocol everyone signs.

Hands-free on site

Tap record. Keep working. It listens.

A hands-free tool so you can focus on the job. Your phone stays in your pocket or on the table while PROTTOBau picks up every voice in the room, in every language, and asks nothing of you until the protocol is ready.

1Tap record
2Focus on the job
3Protocol is ready
Wohnpark BWohnpark B
Site meeting · week 3300:00
Tap Record below. Then just talk — PROTTOBau hears everyone in the room.
Who uses it

Everyone on site. One assistant.

Built first for site and project leads running multi-trade projects. Architects, construction managers and the contractors themselves use the same assistant — nothing to set up on site. Tap record, and it listens. And it comes from practice: we developed PROTTOBau as project managers, for our own sites.

Project managers
Site meetings and decisions, documented before the meeting ends.
Architects
Handovers and defects recorded room by room, photos attached.
Construction managers
Daily reports and instructions spoken while walking the site.
Contractors
Speak in your own language. Sign the same protocol as everyone else.
One site. Many voices. Where issues happen.

Many trades, many languages. Something gets lost every day.

HR → ENNobody told me about the change.
PM
ROOF · SCAFFOLDING
TR → ENDoes the cable tray stay in corridor B?
Contractor
2.OG · FIT-OUT, ROOM 3.02
ENDid anyone write that down?
Architect
RO → ENIs the deadline Friday or Monday?
Contractor
1.OG · SITE OFFICE
DE → ENWe'll do the waterproofing in basement C today.
PM
PL → ENUnderstood. My crew starts at 7.
Contractor
UG C · BASEMENT, WATERPROOFING
One assistant on site Captures, documents, analyzes, reports. Every voice on every floor understood and written into one protocol. Not a recorder — an assistant that hears the whole site and reports back.
UG CWaterproofing instructed on site today.
CORR. BCable tray stays in corridor B, confirmed by 15 Aug.
3.02Screed accepted, 84 m².
ALLDeadline Friday. Change noted for every trade.
VOB/BSigned on site
PM Contractor Architect

What the gaps cost:

5-10%
of project value lost to rework
30%
of rework caused by miscommunication
70%
of site issues from poor documentation
3x
more costly to fix than to document
Figures from published industry studies on rework and site communication — not PROTTOBau customer data.
How It Works

From site conversations to a signed, analyzed protocol.

Wohnpark B
Site meeting · week 33DE TR PL → EN
M. KELLER · DE → EN
Waterproofing in basement C is being instructed today.
A. YILMAZ · TR → EN
We confirm the cable routing by 15 August.
P. NOWAK · PL → EN
Screed in 3.02 accepted, 84 m².
04:12
Stop
Detected while you spoke
Site meeting protocol
Site meeting protocol
Defect report
Daily report
Handover & acceptance
Work instruction
Sign-in / sign-out
BOQ walk-through
To-do list
Report ready
Baubesprechung KW 33
Wohnpark B · VOB/B
What was agreed
Waterproofing in Basement C instructed on site.
Screed in room 3.02 accepted, 84 m².
PHOTO 1
PHOTO 2
Signed byA. Yilmaz
PDF · Share→
Intelligence
3 findings against project data
Drawings — A-301 Level 3MATCH
BOQ — Pos. 3.2.10 Drywall+15 m² DEVIATION
Schedule — Milestone M4AT RISK
Change order CO-07MATCH
Specification — Fire doors EI30MATCH
Commercial impact
Screed +15 m² vs. BOQ pos. 3.2.10 — Nachtrag draft prepared.
What makes it different

Flags issues before they are built.

ProttoBau Intelligence

Recording and documenting is where others stop. After every protocol, ProttoBau Intelligence checks what was said against your drawings, BOQs, specifications, schedules and change orders, and flags inconsistencies, risks and cost impacts while there is still time to act.

Explore ProttoBau Intelligence
Where the issue is caughtWohnpark B
Site meeting
Protocol signed
Intelligence check
Works executed
Final invoice
With PROTTOBau Screed +15 m² vs. BOQ flagged the same afternoon. Nachtrag drafted before the trade leaves. Day 1
Without Discrepancy surfaces at final invoice. Dispute, rework, delay. Month 6
5 document types checked per protocol
<1 min from signed protocol to findings
0 findings you have to look for yourself
Use cases

Eight protocol types your assistant writes for you

01 / 08

Site Meeting Protocols

Walk into your site meeting, press record, and let PROTTOBau handle the rest. Up to 10 participants, each speaking in their own language. PROTTOBau captures attendees, decisions, action items, and responsibilities — structured into a professional protocol ready to distribute before the meeting ends.

Attendees Decisions Action items

These are the core workflows we've trained PROTTOBau on — built according to industry standards and real site requirements. Any additional workflow, report format, or company-specific requirement can be added to your assistant. Your AI, trained for your way of working.

Request a custom workflow

Less paperwork.
Nothing unchecked.

Hours of paperwork go back into building. Decisions are documented and signed on the spot, so there is nothing to argue about later — and nothing to redo.

100+
languages understood on site
10
speakers in one conversation
8
report types, aligned with the country standard
On site
signed and shared the same day
5
document types checked per protocol
0
audio or photos kept once the protocol is written
Why it is different

A recorder writes text. An assistant writes the protocol and checks it.

Today
Notes by hand
—Written after the fact, from memory
—One language, one writer
—No link to the BOQ or programme
—Found again weeks later, if at all
Dictation apps
Transcription tools
~A wall of text, not a protocol
~No report structure, no standard
—No project context
—Nothing is checked
PROTTOBau
Your site assistant
✓Signed protocol before you leave
✓Every speaker, every language
✓Country standard applied automatically
✓Checked against BOQ, plans and programme
Data & confidentiality

Nothing of yours stays with us.

Audio and photos are deleted as soon as the protocol is written. The protocol stays on your team's devices, and every server we use sits in the EU.

No audio kept
Recordings are deleted the moment the protocol is written.
No images kept
Photos go into the protocol, then leave our servers.
EU processing only
All servers sit in the EU and are used for processing, never storage.
Confidential mode
For sensitive projects: no photos at all, protocol from speech only.
Consent built in
Before recording starts, the app prompts you to inform everyone present — and to confirm it with a tap. The protocol notes it.

Tell us about your project.

Send us the project type, size and country. We come back with a package, a setup plan and what we need to train your assistant.

info@virjual.com VirJual: Interiors & Technology
Request a quote
We reply within two working days.