Softwr

Construction · head to head

Kahua vs RIB CostX

Kahua logo

Kahua

Construction

Cloud platform for construction and capital projects

From
$400/month
Rated
-
Full reviewWebsite
RIB CostX logo

RIB CostX

Construction

2D and BIM quantity takeoff with live-linked estimating workbooks for quantity surveyors and estimators

From
On request
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Kahua no standard pricing tiers published; all pricing is custom and quote-based; RIB CostX pricing is not published anywhere and is quoted per package and per seat through regional resellers, so two firms of similar size routinely pay materially different rates for the same configuration.
  • They diverge on capability: Kahua covers Project management, RIB CostX covers 2D drawing takeoff.
  • Prices and features above were last checked on 1 September 2026.

Where they differ

Only the attributes on which Kahua and RIB CostX actually diverge.

Attributes where Kahua and RIB CostX differ
AttributeKahuaRIB CostX
Starting price$400/monthOn request
Pricing modelsubscriptionquote
PlatformsWeb, Ios, AndroidWindows
Founded2007Unknown

Identical on both: free tier (No), user rating (Not yet rated), category (Construction).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in Kahua

  • Project management
  • Document control
  • Collaboration
  • Issue tracking
  • Reporting
  • Microsoft 365
  • Slack
  • Box

Only in RIB CostX

  • 2D drawing takeoff
  • BIM and 3D takeoff
  • Live-linked workbooks
  • Drawing revision comparison
  • Bill of quantities production
  • Rate libraries
  • Subcontractor comparison
  • CostX Viewer

What people use each for

The jobs each tool is most often brought in to do.

Kahua

  • Acting as the system of record for a capital construction program across the asset lifecyclenot RIB CostX
  • Public agencies and program managers tracking portfolios of projectsnot RIB CostX
  • General contractors standardising project delivery and cost control across active projectsnot RIB CostX
  • Specialty contractors managing crews, work orders and project financialsnot RIB CostX

RIB CostX

  • A quantity surveying practice that must issue a formatted bill of quantities under NRM or SMM7 and cannot do so from a generic takeoff toolnot Kahua
  • A contractor tendering a job where the client reissues drawings mid-tender, needing revision comparison so only changed areas are remeasurednot Kahua
  • An estimating department moving from paper and Excel to model-based measurement while keeping the same rate library and bill structurenot Kahua
  • A cost consultant producing early-stage elemental cost plans from partial models, then refining the same workbook as design detail arrivesnot Kahua

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

Kahua

  • No standard pricing tiers published; all pricing is custom and quote-based
  • Pricing varies by organization type, program or construction scale, selected package, and deployment environment
  • Implementation costs for data migration, integrations, training, and configuration scoped separately and included in quote

RIB CostX

  • Pricing is not published anywhere and is quoted per package and per seat through regional resellers, so two firms of similar size routinely pay materially different rates for the same configuration.
  • It is Windows desktop software with heavy graphics demands; there is no meaningful macOS or browser option, which rules it out for practices standardised on Apple hardware.
  • The learning curve is steep enough that firms typically budget formal training, and an estimator productive in a rival tool takes weeks rather than days to reach the same output here.
  • RIB is owned by Schneider Electric, whose strategic interest is the wider RIB construction cloud, so a buyer choosing CostX today is betting on continued investment in a desktop estimating product inside a group focused elsewhere.
  • BIM takeoff is only as good as the model, and on projects where the model is modelled for coordination rather than measurement the automatic quantities need enough manual checking that the time saving largely disappears.

Pricing, plan by plan

Kahua

$400/month
  • Professional$400/month
    • Project management
    • Document control
    • Collaboration
  • EnterpriseFree
    • Advanced analytics
    • Custom workflows
    • API access

RIB CostX

On request
  • CostX Quantify$undefined/year
    • 2D and BIM takeoff
    • Measurement export
    • No integrated estimating workbook
  • CostX Core$undefined/year
    • Takeoff plus live-linked workbooks
    • Rate libraries
    • Standard reporting
  • CostX Complete$undefined/year
    • Full BIM takeoff
    • Advanced workbooks and bills of quantities
    • Subcontractor comparison

Which should you pick?

Choose Kahua if

  • You need project management.
  • You work on Web, Ios, Android.
  • You also want document control.
Kahua review

Choose RIB CostX if

  • You need 2d drawing takeoff.
  • You work on Windows.
  • You also want bim and 3d takeoff.
RIB CostX review

Questions people ask

Is Kahua or RIB CostX better?
Neither clearly leads. Kahua starts at $400/month and RIB CostX at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Kahua or RIB CostX?
Kahua starts at $400/month and RIB CostX at On request.
Does Kahua or RIB CostX run on more platforms?
Kahua runs on Web, Ios, Android. RIB CostX runs on Windows.
What is Kahua best used for?
Kahua is most often used for acting as the system of record for a capital construction program across the asset lifecycle, public agencies and program managers tracking portfolios of projects, general contractors standardising project delivery and cost control across active projects, specialty contractors managing crews, work orders and project financials. Of those, acting as the system of record for a capital construction program across the asset lifecycle and public agencies and program managers tracking portfolios of projects are not what RIB CostX is typically brought in for.
What can Kahua do that RIB CostX cannot?
Kahua covers Project management, Document control, Collaboration, Issue tracking. RIB CostX covers 2D drawing takeoff, BIM and 3D takeoff, Live-linked workbooks, Drawing revision comparison.

Answered from the vendors’ own pages

Kahua: How much does Kahua cost?

Kahua does not publish standard pricing. Costs vary by organization type (Owners/Program Managers, General Contractors, Specialty Contractors), program scale, selected package, deployment environment, and implementation requirements. Customers must request pricing quotes.

Source
RIB CostX: How much does RIB CostX cost?

RIB does not publish prices. It is quoted per package (Quantify, Core or Complete) and per seat, usually through a regional reseller.

Kahua: What package options does Kahua offer?

Kahua offers three main package categories: Owners and Program Managers, General Contractors, and Specialty Contractors. Additional specialty apps and suites including capital planning, analytics, asset management, and safety can extend the base solution.

Source
RIB CostX: Is a perpetual licence available?

RIB has historically offered both perpetual and subscription licensing, with subscription now the default push. Ask explicitly, because the perpetual option is not advertised.

Kahua: Are implementation and integration costs included in Kahua pricing?

Implementation details including data migration, integrations, training, and configuration are scoped based on requirements and clearly identified in the custom quote provided.

Source
RIB CostX: Does it do BIM takeoff or just 2D?

Both. Complete handles IFC and Revit models; Quantify and Core differ in workbook capability rather than measurement.

RIB CostX: Who is it for?

Quantity surveyors and estimators in markets that use bills of quantities: UK, Ireland, Australia, New Zealand, the Middle East and South Africa above all.

RIB CostX: Can we open estimates without a licence?

A free CostX Viewer lets others open and inspect measured drawings and workbooks without a full seat.

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