# Kahua vs STACK Estimating

**Leader by vioscaleAI score:** STACK Estimating

| Attribute | Kahua | STACK Estimating |
|---|---|---|
| **vioscaleAI score** | 48.5 (46% (low)) | 60.1 (68% (medium)) |
| content.faq | `[{"answer":"A construction management platform for general contractors that provides core project delivery, field execution, and collaboration tools, with optional financial control, analytics, and forecasting capabilities for larger organizations. It is indexed under Construction Management Software.","source":"http://kahua.com/pricing/general-contractors/","question":"What is Kahua?","confidence":0.6},{"answer":"Kahua does not publish its prices. Pricing is quoted on request, across 2 plans (Essentials and Premium), so the figure depends on your seat count and requirements. We record this as a pricing-transparency signal rather than guessing a number. Pricing changes often, so verify at source before relying on it.","source":"http://kahua.com/pricing/general-contractors/","question":"How much does Kahua cost?","confidence":0.6},{"answer":"We have confirmed browser-based access to Kahua. That is the extent of what we could verify from public sources, so it may well offer desktop or mobile clients we have not indexed.","source":"http://kahua.com/pricing/general-contractors/","question":"What platforms does Kahua support?","confidence":0.6},{"answer":"We have only confirmed a cloud / SaaS deployment for Kahua, so it appears to be vendor-hosted. If a self-hosted option exists we have not found it documented publicly.","source":"http://kahua.com/pricing/","question":"Can Kahua be self-hosted?","confidence":0.6},{"answer":"We have independently confirmed SOC 2, ISO 27001 and GDPR for Kahua. Certifications we do not list are ones we have not been able to verify from public sources, which is not the same as Kahua not holding them. Always confirm compliance directly before you rely on it.","source":"https://www.kahua.com/security","question":"What security certifications does Kahua have?","confidence":0.7}]` | `[{"answer":"Cloud-based platform for construction takeoff, estimating, and field operations. Provides automated measurement of drawings, bid pricing, and mobile field management for contractors, suppliers, and owners. It is indexed under Construction Management Software.","source":"https://www.stackct.com","question":"What is STACK Estimating?","confidence":0.6},{"answer":"STACK Estimating offers a free tier, so you can start without paying. Pricing changes often, so verify at source before relying on it.","source":"https://www.stackct.com","question":"Is STACK Estimating free?","confidence":0.6},{"answer":"STACK Estimating supports the web, Windows, iOS and Android. Platforms we have not confirmed are simply not listed here rather than ruled out.","source":"https://www.stackct.com","question":"What platforms does STACK Estimating support?","confidence":0.6},{"answer":"We have only confirmed a cloud / SaaS deployment for STACK Estimating, so it appears to be vendor-hosted. If a self-hosted option exists we have not found it documented publicly.","source":"https://www.stackct.com","question":"Can STACK Estimating be self-hosted?","confidence":0.6},{"answer":"We have independently confirmed SOC 2 for STACK Estimating. Certifications we do not list are ones we have not been able to verify from public sources, which is not the same as STACK Estimating not holding them. Always confirm compliance directly before you rely on it.","source":"https://trust.stackct.com","question":"What security certifications does STACK Estimating have?","confidence":0.7}]` |
| deployment.options | `{"cloud":true}` | `{"cloud":true}` |
| description.long | Enterprise software for owners, program managers, and contractors to plan, fund, control, and track capital projects across portfolios with integrated cost management, compliance workflows, and reporting. | A cloud-based software platform designed to help construction teams accelerate quantity takeoffs, develop cost estimates, and manage project documents using AI-powered measurement and analysis tools. |
| features.capabilities | `{"soc2":true,"bim_ifc":"none","iso_19650":true,"scheduling":true,"pricing_model":"tiered","rfi_submittal":true,"accounting_erp":true,"mobile_support":"mobile","primary_module":"project_mgmt","safety_quality":true,"target_segment":"gc","document_control":true}` | `{"accounting_erp":true,"mobile_support":"mobile","primary_module":"estimating","deployment_model":"cloud_saas_platform","document_control":true,"estimating_takeoff":true,"excel_direct_export_integration":true,"ai_auto_count_symbol_recognition":true,"collaborative_cloud_multi_user_viewing":true,"linear_area_and_volume_measurement_tools":true,"customizable_assemblies_and_material_grouping":true,"multi_page_plan_overlay_and_revision_comparison":true}` |
| integrations.count | 4 | 1 |
| integrations.list | `[{"name":"ERP systems"},{"name":"Microsoft Project","native":false,"category":"scheduling","direction":"bidirectional"},{"name":"Primavera P6","native":false,"category":"scheduling","direction":"bidirectional"},{"name":"DocuSign","native":true,"category":"e-signature","direction":"outbound"},{"name":"Dexter Chaney","native":false,"category":"accounting"}]` | `[{"name":"QuickBooks Online"}]` |
| market.availability | `{"primaryMarkets":["US","GB"],"availabilityScope":"global","availableCountries":["US","GB"],"notAvailableCountries":[]}` | - |
| platform.support | `{"ios":true,"web":true,"android":true}` | `{"web":true}` |
| pricing | `{"type":"quote","plans":[{"free":false,"name":"Owners and Program Managers","description":"Configurable enterprise package for capital program owners, asset leaders, public agencies, and PM/CM teams","contactSales":true},{"free":false,"name":"Essentials","description":"Entry-level package for general contractors and specialty contractors","contactSales":true},{"free":false,"name":"Premium","description":"Advanced package for general contractors and specialty contractors with enhanced financial and operational capabilities","contactSales":true}],"summary":"Custom quote based on organization type, program scale, and deployment environment","freeTier":false,"sourceUrl":"http://kahua.com/pricing/","retrievedAt":"2026-10-07T13:53:24.038Z"}` | `{"freeTier":true,"sourceUrl":"https://www.stackct.com","retrievedAt":"2026-08-03T11:57:18.047Z"}` |
| pricing.free_tier | no | yes |
| pricing.model | quote | freemium |
| pricing.price_level | unknown | low |
| pricing.transparent | no | no |
| reliability.sla_pct | 99.998 | 99.9 |
| reliability.status_page | yes | yes |
| security.certifications | `[{"name":"SOC 2 Type II","level":"Type II","status":"active"},{"name":"ISO 27001","status":"active"},{"name":"FedRAMP Class C","level":"Class C","status":"active"},{"name":"GovRAMP Moderate","level":"Moderate","status":"active"},{"name":"ISO 19650","level":"Parts 1, 2, 5, 6","status":"active","auditor":"BSI"}]` | - |
| security.disclosure_policy | - | yes |
| security.fedramp | yes | - |
| security.gdpr | yes | - |
| security.iso27001 | yes | - |
| security.pci | - | yes |
| security.soc2 | yes | yes |
| security.trust_center | http://kahua.com/security/ | - |

## Capabilities (Construction Management Software)

| Capability | Kahua | STACK Estimating |
|---|:--:|:--:|
| **Core** |  |  |
| Primary module | Project management | Estimating/takeoff |
| **Preconstruction** |  |  |
| BIM / IFC support | None / unknown | - |
| Estimating and quantity takeoff | - | ✓ |
| **Documents** |  |  |
| Document control and drawing management | ✓ | ✓ |
| RFI and submittal management | ✓ | - |
| **Scheduling** |  |  |
| Scheduling (Gantt / CPM) | ✓ | - |
| **Field** |  |  |
| Safety and quality management | ✓ | - |
| Mobile field app | Mobile field app | Mobile field app |
| **Integrations** |  |  |
| Accounting / ERP integration | ✓ | ✓ |
| **Compliance** |  |  |
| ISO 19650 (BIM information management) support | ✓ | - |
| SOC 2 attested | ✓ | - |
| **Pricing** |  |  |
| Pricing model | Published tiers | - |
| **Market** |  |  |
| Target segment | General contractor | - |

*Source: vioscaleAI. Generated 2026-10-16T03:54:38.251Z. "-" = undocumented, not absent.*