# Kahua vs STACK Estimating

**Leader by Vioscale score:** STACK Estimating

| Attribute | Kahua | STACK Estimating |
|---|---|---|
| **Vioscale score** | 37.5 (45% (low)) | 56 (71% (medium)) |
| deployment.options | `{"cloud":true}` | `{"cloud":true}` |
| description.long | Project Management Information System (PMIS) that integrates with ERP platforms, enabling construction and capital project teams to manage projects while maintaining financial data in the ERP system of record. | 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. |
| features.capabilities | `{"bim_ifc":"none","accounting_erp":true,"primary_module":"project_mgmt"}` | `{"accounting_erp":true,"mobile_support":"mobile","primary_module":"estimating","document_control":true,"estimating_takeoff":true}` |
| integrations.count | 1 | 1 |
| integrations.list | `[{"name":"ERP systems"}]` | `[{"name":"QuickBooks Online"}]` |
| platform.support | `{"web":true}` | `{"ios":true,"web":true,"android":true,"windows":true}` |
| pricing | `{"type":"quote","freeTier":false,"sourceUrl":"https://www.kahua.com","retrievedAt":"2026-08-03T11:56:22.639Z"}` | `{"freeTier":true,"sourceUrl":"https://www.stackct.com","retrievedAt":"2026-08-03T11:57:18.047Z"}` |
| pricing.free_tier | no | yes |
| pricing.model | commercial | freemium |
| pricing.price_level | unknown | low |
| pricing.transparent | no | no |
| reliability.sla_pct | 99.998 | 99.9 |
| reliability.status_page | yes | yes |
| security.disclosure_policy | - | yes |
| security.fedramp | yes | - |
| security.gdpr | yes | - |
| security.iso27001 | yes | - |
| security.pci | - | yes |
| security.soc2 | yes | yes |

## 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 |
| **Integrations** |  |  |
| Accounting / ERP integration | ✓ | ✓ |
| **Compliance** |  |  |
| ISO 19650 (BIM information management) support | - | - |
| SOC 2 attested | - | - |
| **Pricing** |  |  |
| Pricing model | - | - |
| **Market** |  |  |
| Target segment | - | - |

*Source: Vioscale. Generated 2026-09-01T16:38:52.166Z. "-" = undocumented, not absent.*