BIM Harness turns a written brief into a real BIM model - from a family house to a hospital of 23,000 elements, with structure, rooms, façade and fourteen clash-free MEP systems. Not a picture. IFC you keep working with.
01Text → IFC with 14 MEP systems02Clash-free MEP straight from generation03A photorealistic model in the browser04IFC4X3 import, export and round-trip
On Wednesday 14 October at 9:00 we open the waitlist. The first 50 people get access straight away and 200 free credits, enough for about 4–12 building designs. The next 50 get 70 credits. Get a heads-up so you don’t miss the start.
The whole editor, AI included, runs in the browser - for architects, engineers and developers, nothing to install.
BIM Harness - new design
Brief
Architect
Structure
HVAC and cooling
Plumbing and gases
Power and low-voltage
Clash check
Done - an IFC model of 23,321 elements, 4,004 of them MEP components
13 min
from one sentence to a hospital, MEP included
23,321
BIM elements in a hospital from a single brief
14
MEP systems, from water to medical gases
0
MEP clashes in the delivered model
What it builds from one sentence today
Hospitals and clinicsHotelsOfficesSchoolsApartment buildingsFamily houses and villasShopping centresRetail parksCultural centresProduction and logistics hallsPrecast and frame structuresBuildings on slopesCastles and monuments from cadastral data
Once a generation
Design has changed like this only twice. This is the third time.
From ink and ruler to the cursor took thirty years. From the cursor to a single sentence took one leap.
1960
Drawing board
Every line by hand, in ink, against a ruler. A changed brief meant redrawing the sheet from scratch — and every trade with it.
weeksper drawing
1990
CAD
Drawing moved onto the computer. Faster lines, copy, layers — but still lines, element by element, trade by trade.
daysfor a coordinated model
2026
BIM Harness
Describe a building in one sentence and AI builds it: structure, rooms, façade and 14 clash-free MEP systems. Open IFC you keep editing.
minutesfrom sentence to building
Those who moved from the board to CAD first gained years of lead.
That moment is here again.
From one sentence to a finished model
Watch the AI build a building - and how you refine it by dragging, or with the next sentence.
One written brief → a finished apartment building with MEP, drawings and manual edits · 0:53
How it works
Five clicks. Six person-years of engineering under them.
The wizard is all you see. Underneath runs our own geometry kernel, a team of AI specialists, building services in installation zones and a quality check from every view. Switch on the X-ray to look below the surface.
On the surfaceType what you want to build, or pick a new or an existing building. You always start in the wizard.
Under the surfaceThe server reads the brief and routes it: native building, kit, or the open lane. The turn then gets only the API vocabulary this building needs.
On the surfaceHouses, hospitals, bridges and substations from the Harness library, your own building system, or your own brief.
Under the surfaceA capability registry of dozens of building types and parts. Kits carry a manifest checked by a server gate and only appear after a trial build.
On the surfaceFloor area, storeys, beds or span. The holographic preview changes with every choice.
Under the surfaceThe building programme, functional relations, room sizes from the standards, shafts and installation space are planned before the first wall.
On the surfaceFive building-services trades; domain networks for infrastructure.
Under the surfaceLike an engineer does it: every trade is a data record, zones are derived from the architecture (wiring in the wall installation zones of DIN 18015-3, water and heating in the floor and service walls, ventilation in the ceiling void) and every trade gets its own lane. Underneath, over 47,000 lines of the services core.
On the surfaceAn estimate in credits at every step, and the balance after the run.
Under the surfaceEstimated from measured live runs of similar buildings, with a safety margin. The real use is charged, capped at the upper bound; a failed run refunds its credits.
On the surfaceA holographic card shows what the AI team is doing.
Under the surfaceA team of AI specialists run by more than 23,000 lines of server orchestration, 49 tools of our own kernel, and a dedicated briefing for every turn.
On the surfaceA quality scan finds what does not fit and fixes it before you get the model.
Under the surfaceA gate of 11 aspects from every view, clash detection and rules of construction logic: nothing floating, stairs with headroom, rooms with air.
On the surfaceA full BIM editor in the browser, IFC 4, schedules, a shareable link.
Under the surfaceOur own geometry and BIM kernel of more than 225,000 lines, not a layer over someone else’s CAD. It builds a hospital ward block right in the browser in 16–25 seconds.
On the surfaceAn address, photos, drawings and a survey become a model of the existing state and a building passport.
Under the surfacePhotos are read question by question, compared with the cadastre and the terrain model, and the camera is registered to the photos.
cde.buildify.cz/harness · Start with a sentence or a choice
Under the surface · 01
The server reads the brief and routes it: native building, kit, or the open lane. The turn then gets only the API vocabulary this building needs.
Open a model right here
These are not images or finished files. The editor assembles each one in your own browser, element by element, and then you turn it round.
Live model - BIM Harness
The model is assembled on your own machine, not on our server. It takes a few seconds depending on the building.
Example models
Open a finished model
Forty buildings in six categories - from a family house to an opera house of 86,006 elements. Pick a category and open a real project file straight in your browser - no install, no sign-up.
Pick a category to see the models we have in it.
The models were built on the BIM Harness kernel with the help of AI and project scripts, and they open on your own machine from .bproj project files, not as a picture or a video. You turn real geometry, cut it open and download it as IFC.
New builds
Harness builds more than houses now
Your own kits from one sentence, architectural style as data, spaces before walls, building services the way a designer draws them, and the passport of an existing building. The numbers come from live runs, not slides.
51models in the gallery, 9 of them new
4kits Harness wrote, each from one sentence
2.2credits for a factory built from an organization kit
32built-in styles, plus your own
01Kits
Your own kit from one sentence
Write "Create a kit for breweries: brewhouse, fermentation, bottling…". Harness researches the parts, writes them as parametric functions, builds a demo and saves the kit for your organization. The next project simply uses it.
Industrial kits stand on a verified base: halls with structure, roof lights and PV, cranes, robots, racks, vehicles and the site
Every "Improve the kit…" turn files its next version
A factory from the kit for 2.2 credits in 97 seconds
A curator can promote the kit to verified for everyone
Verified live on 4 Oct: a car plant, a brewery, a gondola lift and a playground. Each kit came from one sentence for 3 to 16 credits.
32 built-in styles from classical to parametric, or your own style card from photos, words or a model. Every later model keeps to it and reports after the build how many of its rules it met.
Massing, proportions, bay rhythm, openings, roof and materials by zone
Make the card by hand or with AI, most often from photos
Verified by a trial build of a sample house, at no credit cost
A style is data, not code: you create it yourself, without a programmer and without approval.
The building programme, operational links and standard room sizes are planned first. With them comes the room for services: shafts, ceiling voids, pre-walls and the installation zones of walls.
Rooms by typology and operational links
Shafts and service spaces reserved up front, not squeezed in later
The holographic preview changes with every choice
When a trade does not fit, its space grows by rule: a lower ceiling, a wider pre-wall. Nothing is left out.
04Building servicesIn verification
Services the way a designer draws them: zones, not blind routing
Electrical only in the installation zones of walls per ČSN 33 2130, water and heating in the floor build-up and pre-walls, drainage in shafts and under the slab, ventilation in the ceiling void, and every trade in its own lane. No two trades get the same place, so they cannot clash.
A trade is a data record: zones, lane, terminals, topology and sizing
Generator and checker use the same standard rule
Five building-services trades, domain networks for infrastructure
The zone engine is being verified on a corpus of houses and villas, then on a care home, a hotel and a hall.
Zones are derived from the architecture, so a changed layout means a new computation of zones and routes, not manual redrawing. No clash hunting and patching: every trade has its place from the start.
A zone grows monotonically and deterministically; nothing is ever left out
A new trade is added as data only; the engine does not change
Large buildings are coordinated by a typical section, as in hospitals and airports
The same principle will carry halls and stadiums: a band in the trusses, a service gallery, risers in the cores.
06Passport
Existing buildings: a model and a passport from photos and drawings
An address, facade photos, old drawings and a survey become a model of the existing state and a building passport. The AI only reads, deterministic code measures, and a person confirms the facts.
Drawings are read tile by tile, rectified, and the scale is calibrated by the areas in the legend
Facade photos settle openings, plinth, roof and colours
Checked against the cadastre and the DMR 5G terrain model
Every fact in the model cites its source
Interiors only for documented storeys, windows as whole frames without drift, nothing invented.
07Sport and infrastructure
Stadiums, roads and ports from kits
Verified kits for works that are not buildings: a football stadium and an ice-hockey arena, a cloverleaf interchange and a road through hills, a container terminal with cranes and a ship.
Roads the way a road designer draws them: transition curves, vertical curves, pavement layers on a 1:1 edge, shoulders, slopes with topsoil
Guardrails, delineators, kilometre posts, markings and lighting
Stadiums with a bowl of stands, a roof, floodlights and entrances
Open every model in the gallery, live in your browser.
On Wednesday 14 October at 9:00 we open the waitlist. The first 50 people get access straight away and 200 free credits, enough for about 4–12 building designs. The next 50 get 70 credits. Get a heads-up so you don’t miss the start.
Places left
Places 1–50 · 200 free credits50 places
Places 51–100 · 70 free credits50 places
Places 101–200 · 20 € · 50 credits100 places
Public launchon Wednesday 18 November at 9:00· subscriptions at list price, the waitlist closes
Free places go out in the order e-mails are confirmed, not the order of sign-up.
A paid place is a one-time payment, not a subscription.
The full editor, IFC export, AI designs and MEP with clash checking.
Once you have a place, you can buy more credits at any time for 0,40 € each.
Your account and any unused credits stay with you after the public launch.
Waitlist opens in
--
days
--
hrs
--
min
--
sec
Notify me at launch
We will e-mail you on Wednesday 14 October at 9:00, the moment the waitlist opens.
An AI that doesn’t draw pictures. It builds models.
There are hundreds of image generators. BIM Harness is the only tool we know of that returns a complete, still-editable BIM model from a description.
VS
Image AI
Returns pixels - a pretty visual with no geometry
No storeys, walls or rooms you can work with
Every change means regenerating and hoping
Moving the output into a project starts from zero, by hand
BIM Harness
Returns an IFC model - storeys, structure, openings, rooms, façade, roof and fourteen MEP systems
Every element is a real entity with parameters, a type and a material
Refine it by dragging in the editor, or with the next sentence to the AI
Export to open IFC4X3 - Autodesk, Archicad and your CDE pick it up
The output isn’t inspiration. It’s a project in progress.
Under the hood
Our own kernel, not a layer on someone else’s CAD
Most AI tools for architecture are plugins for established, expensive software - and they inherit both their ceiling and their licence. BIM Harness stands on a parametric kernel we wrote from scratch. That is precisely why it can do what a wrapper cannot reach.
The kernel is a parametric model in the browser - not IFC in memory. Move a wall and only what hangs on it regenerates; that is why an edit is instant, and a whole hospital of roughly 20,000 elements, MEP included, builds on the kernel in under a minute. Rendering runs on streamed 3D tiles, so even a model of 86,000 elements turns smoothly in the browser. IFC is the entrance and the exit.
1
sentence of brief
the building described in your own words
30
AI specialists
an architect holds the whole, roles write their modules
< 60 s
parametric kernel
to build a 20,000-element hospital, MEP included
IFC
model, drawings, schedules
open IFC4X3 export with no locks
A parametric object model
A wall knows it is a wall: it has a build-up, mitred corners, openings as a relation and a dependency graph. Change the type and the model regenerates - no rewriting lines in a file and hoping.
Grids, families, types and formulas
Structural grids, columns on intersections, datum elements, families with parameters and unit-checked formulas. Exactly the layer desktop BIM tools stand on - in the browser, without a five-figure licence.
Views, drawings and schedules
Plans and sections are generated from the geometry, annotations belong to the view, and schedules work both ways: overwrite a number in the table and the model changes.
IFC is the boundary, not the internals
The model does not live as STEP lines in memory. IFC is imported at the entrance and generated deterministically at the exit - which is why the export never collapses into triangle soup.
22,600+
automated tests guard every release
100%
of common projecting software features covered in the browser
0
dependencies on third-party licences
A wrapper over someone else’s API takes a month to build. This is six person-years of work on geometry, constraints and regeneration - and it is the reason a sentence turns into a building rather than a cloud of triangles.
Head start
What anyone catching up would have to build
Layers from the bottom up, like storeys. The figures come from the repository, not from a slide.
6person-years of engineering
A wrapper over someone else’s API takes a month. This does not.
06Verification22,600+automated tests, over 6,000 changes in the history
05Quality check11aspects of the all-views gate plus rules of construction logic
04Building-services core47,000+lines; trades as data records, installation zones from the standards
03AI team orchestration23,000+lines of server orchestration, per-brief briefing and vocabulary
02Building scripting API for AI49kernel tools the AI calls; 15,000 lines in the plan API alone
01Geometry and BIM kernel225,000+lines of our own kernel code, native IFC 4
Completeness
Not a shell. A building with fourteen MEP systems.
Massing generators stop at the envelope and the layout. Harness carries on where a designer’s real work starts - services, penetrations and coordination.
Architecture and layout
Storeys, rooms by typology, circulation cores, multi-storey atria with escalators, set-back storeys, cantilevers and organic forms.
Structure and reinforcement
Columns on grids, beams, slabs, precast elements and steel halls. Foundations that follow the terrain and reinforcement generated to EN 1992 (Eurocode 2) rules - with schedules and drawings.
Ventilation, water and heating
HVAC with heat recovery, chilled water, heating from boiler cascades to radiators, domestic water with circulation and drainage laid to falls - mains in the ceiling void, shafts, risers and penetrations cut into the structure.
Electrics down to the circuits
Service connection, switchroom, boards per floor, feeders sized for the load, circuits, cable trays, emergency lighting, lightning protection with earthing and EV charging.
Low-voltage, fire and gases
Data cabling kept apart from power, fire alarm, sprinklers, gas and medical gases routed all the way to the beds.
Clash-free MEP
Clashes are not hunted down after handover. The check runs inside generation and measures analytically - route axes, radii, containment in a solid - and automatic repair reroutes the services until the model has no hard clashes.
A large hospital model now carries more than 4,000 MEP components across fourteen systems - and leaves without hard clashes. Every release is guarded by a regression suite of 4,500+ tests and a benchmark of 21 reference buildings, from a bungalow to a hospital wing with medical gases; live runs on real briefs keep stress-testing the whole chain.
Style cards
Your architectural signature as a style card
A practice, a developer or a home builder defines its style once and every later model keeps it: cladding, roof, windows, plinth and ornament. In the wizard you pick the style card, or leave the default “No style”.
01
From photos
Upload 3–8 photos of buildings you like. AI reads them question by question, like a building passport: facade, roof, windows. For every trait it says how sure it is and which photo it read it from.
from Studio · ≈ 1–4 credits per reading
02
In words
“Nordic house, vertical larch cladding, zinc roof at 38°, tall narrow windows, no cornices.” Read instantly; fine-tune the uncertain traits in the style studio.
from Start · free
03
From a built-in style
32 cards from antiquity to parametricism, each with its source in architectural history. Start from one and make it yours.
from Start · free
Style cardDraft · v3
Novák Studio · Nordic house
Vertical larch cladding
Gable 38°, zinc
Tall windows
Concrete plinth 40 cm
No ornament
What is checked after the build
Timber ≥ 60 % of the solid facademeasured · must
No ornamentmeasured · must
Gable roof 38°applied
Tall windowsapplied
Trial32 built-in styles
Start1 style of your own
Studio10 styles, also from photos
MaxUnlimited styles, also from photos
A style is not a prompt, it is data. The engine applies it wherever the brief said nothing, never overrides what you said explicitly, and measures what can be measured after the build.
Openness
Your project in. Your format out.
Harness is not a walled garden. It opens IFC from Autodesk and Civil 3D, exports IFC4X3, writes properties to the Czech building data standard and hands you drawings as PDF and DWG.
IFC import with no silent loss
Every entity type in the schema has a declared fate and every element shows up in the import report. Across real-world exports from Autodesk 2021–2024 to Civil 3D - IFC2X3, IFC4 and IFC4X3, alignments included - measured import coverage is 1.0. What doesn’t import, you know about; nothing vanishes without a trace.
Building data standard
Properties are written as typed IFC values, the model validates against IDS, and the vocabulary of the Czech data standard (ČAS) loads straight from the public API. CCI classification lives in the project as maintained data, not as a note.
Drawings, PDF and exchanges
Plans and sections are generated from the model geometry and exported to PDF - dimensions, annotations and full diacritics included. The schedule exchanges with MS Project, the take-off with Excel.
1.0
import coverage on real-world exports
746
IFC4 types with a declared fate
373 ms
to open a 35 MB IFC file
Test corpus: 57 real files from 0.1 MB to 2.5 GB - Autodesk 2020–2026, Civil 3D, Bentley.
Architecture and photorealism
From a neoclassical villa to organic architecture
Generative design has a reputation for grey blocks. BIM Harness builds real geometry - classical ornament as well as modern forms - and shows it photorealistically right in the editor.
Modern architecture
Rounded and organic forms, cantilevers, set-back storeys, glazed ground floors as lightweight curtain walls, timber cladding and multi-storey atria with escalators. From one sentence: a villa, a shopping centre, a hotel or a cultural centre.
Ornament as geometry
Cornices, window surrounds, corner rustication, pilasters, balustrades, arches, gables and dentils. Shaped profiles swept along the perimeter that break at openings and regenerate when you edit.
Photorealism without a render farm
Photographed PBR materials, shader-drawn timber, transparent glass, a sky with a sun and filmic tone mapping. Path tracing right in the browser produces photorealistic stills and fly-throughs - with no export to another program.
Built on the real terrain
Terrain from the Czech elevation model (DMR 5G), footprints from the Czech cadastre (RÚIAN) and photographs as the benchmark for fidelity. That is why the castles in the gallery sit on their rock - and your house sits on its plot.
AI design is just the start. Underneath sits a full BIM editor.
AI design of a whole building
A written description becomes a complete model: layout, structure, openings, façade, roof and fourteen MEP systems - from a family house to a hospital of 23,000 elements.
A team of 30 AI specialists
It is not one prompt working on the model. A registry of 30 roles - from structure and HVAC to fire - each writing into its own module while an architect holds the whole.
Iterate with the next sentence
“Add a storey.” “Enlarge the south-facing windows.” The AI updates the model, versions sit side by side - and a built-in prompt advisor helps you write a better brief.
An editor like professional CAD
A ribbon, families with custom solids, DWG and PDF underlays, details, keynotes and sun studies. 78% of the features of established, expensive BIM software - in the browser, nothing to install.
Classical and modern architecture
Cornices, pilasters and balustrades as well as organic forms, cantilevers, curtain walls and timber cladding - from the palette or with a single sentence.
IFC import and round-trip
Open your own project from Autodesk or Civil 3D - IFC2X3 to IFC4X3. Every entity has a declared fate, and the model survives export and re-import without loss.
Data standard and classification
Typed IFC properties, IDS validation, the vocabulary of the Czech data standard (ČAS) and CCI classification right in the model.
Drawings, PDF and DWG
Plans, sections and a permit set generated from the model, with dimensions, annotations and hidden lines. Export to PDF, DWG and DXF.
Construction scheduling (4D)
Activities bound to model elements, dependencies, critical path, calendars, resources and baselines. A Gantt inside the editor and a two-way MS Project exchange.
Quantity take-off and cost estimate
Volumes, areas and counts measured from the geometry, company price lists and AI pricing with an audit trail. Live recalculation as you edit, export to XLSX and CSV.
Scripting API
Batch edits by script - the same API the AI agent builds the model with. Whatever it can do, so can you.
Open IFC and CDE
Export any time, with no locks. Share, version and review the model in the Conexium CDE, and bim-pulse delivers it to your partners’ CDEs.
Manual editor
A full BIM editor. In the browser, nothing to install.
Refine by hand what the AI designs - or draw the whole building yourself. Walls, floors, stairs, suspended ceilings, roofs and openings in one model on a parametric core.
Parametric core: every element keeps its dimensions and relations, and a change flows into the model and the drawings
Does everything you expect from established, expensive BIM software: architecture, MEP, foundations, structure and reinforcement
Runs in the browser - no installation, no per-seat licence, no workstation hardware
IFC export and PDF drawing sets from the same model
A modern alternative to the established desktop BIM tools, at a fraction of their price
From 500 CZK a month.
Drawing by hand, up close · A villa with a pool drawn by hand in the editor - a glazed ground floor, a cantilevered upper storey, stairs, a terrace with glass railings, the pool, a flat roof and the building services: water, drainage, heating and ventilation. It ends with a fly-around in the visualization. Sped up 6× · 1:21
A look inside the editor
From the generated design to detailed edits - all in one browser window.
Generated from a single prompt - structure plus HVAC, plumbing and electrical runs
Materials, shadows and lighting right in the browser
Drawing, snapping and dimensions with no CAD to install
A chat that designs and edits the model for you
Activities, dependencies and dates generated from the model
Volumes, areas and prices by material, storey and class
Who BIM Harness is for
For everyone who needs a real model out of an idea, fast.
Architects and engineers
Developers and investors
Design & build firms
Schools and research
What it costs
One model works out at 7–20 €
200 €
per month on the Start plan
≈ 10–30 buildings
complete models, services included
7–20 €
per generated model
What an hour in the studio costs, you know better than we do. This is a fraction of one - and what comes back is not a picture for a presentation but a project in progress, services and all.
Pricing
Monthly packages with credits. When they run out, buy more at your plan’s per-credit price.
Subscriptions launch in November.
Prices are valid until 1 March 2027. For new customers they will then rise by at least 100 % - start earlier and your price stays fixed.
The same estimate the wizard shows in the app. It includes a safety margin; the real use is charged, capped at the upper bound.
Building type
Without services
With services
Time
Family house
27–42 kr≈ 11–17 €
36–56 kr≈ 14–22 €
6–11 min
Villa
30–48 kr≈ 12–19 €
42–65 kr≈ 17–26 €
8–14 min
Apartment block
45–68 kr≈ 18–27 €
62–98 kr≈ 25–39 €
11–18 min
Hospital ward block
50–83 kr≈ 20–33 €
77–131 kr≈ 31–52 €
15–27 min
Care home
56–86 kr≈ 22–34 €
83–131 kr≈ 33–52 €
14–23 min
Hall, logistics
18–33 kr≈ 7–13 €
25–48 kr≈ 10–19 €
6–12 min
Bridge, substation, cable car
4–10 kr≈ 2–4 €
no networks
3–8 min
Existing building (passport)
38–68 kr≈ 15–27 €
50–89 kr≈ 20–36 €
12–21 min
Credits at a typical size. 1 credit = 0,40 € (Start), 0,31 € (Max).
No subscription: credits one at a time for 0,40 € each. 50 credits make about 1–3 building designs, depending on how demanding the output is.
Credits track actual AI usage - you pay for what you use.
Not sure which package fits? Write to us - we’ll walk through your workload and recommend one.
We are not registered for VAT - the prices shown are final.
The Buildify ecosystem
One link in the chain. The whole data flow.
BIM Harness designs the building, Conexium manages it, bim-pulse delivers it to your partners. Each product works on its own - together they form one data flow from the first sentence to the site.
01DesignYou are here
BIM Harness
An AI that builds a whole building from a sentence.
