# iSqFt vs STACK Estimating

**Leader by Vioscale score:** STACK Estimating

| Attribute | iSqFt | STACK Estimating |
|---|---|---|
| **Vioscale score** | 43.4 (37% (low)) | 56 (71% (medium)) |
| deployment.options | `{"cloud":true}` | `{"cloud":true}` |
| description.long | A marketplace connecting general contractors and subcontractors with active construction projects in the United States, offering project details, bidding documents, planholders information, and integrated estimating and takeoff tools. | 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 | `{"pricing_model":"freemium_for_subcontractors","deployment_model":"two_sided_network_marketplace","digital_plan_room_document_distribution":true,"public_open_project_lead_bulletin_boards":true,"mass_itb_invitation_to_bid_email_blasting":true}` | `{"accounting_erp":true,"mobile_support":"mobile","primary_module":"estimating","document_control":true,"estimating_takeoff":true}` |
| integrations.count | 3 | 1 |
| integrations.list | `[{"name":"On-Screen Takeoff"},{"name":"PlanSwift"},{"name":"QuoteSoft"}]` | `[{"name":"QuickBooks Online"}]` |
| market.availability | `{"hqCountry":"US","primaryMarkets":["US"],"availabilityScope":"regional","availableCountries":["US"],"notAvailableCountries":[]}` | - |
| platform.support | `{"web":true}` | `{"ios":true,"web":true,"android":true,"windows":true}` |
| pricing | `{"type":"subscription","plans":[{"free":true,"name":"Free","features":["Filters and keyword searches","Limited project details","Bid dates and locations"],"description":"Limited access to project details, bid dates, and locations with filtering and search capabilities"},{"free":false,"name":"Standard","features":["Saved searches with daily email delivery","Project details and key contacts","Digital bid board for pipeline organization"],"description":"Expanded access with saved searches and daily project lead delivery"},{"free":false,"name":"Premium","features":["Complete bidding documents","Bidder and planholder information","Full project details and contacts","Access to 500,000+ projects with 5,000 updated daily"],"description":"Full access to all bidding and planning project information"}],"summary":"Free tier available; pricing details not publicly displayed","currency":"USD","freeTier":true,"sourceUrl":"https://www.isqft.com","retrievedAt":"2026-08-22T22:28:14.067Z"}` | `{"freeTier":true,"sourceUrl":"https://www.stackct.com","retrievedAt":"2026-08-03T11:57:18.047Z"}` |
| pricing.free_tier | yes | yes |
| pricing.model | freemium | freemium |
| pricing.price_level | low | low |
| pricing.transparent | no | no |
| reliability.sla_pct | - | 99.9 |
| reliability.status_page | - | yes |
| security.disclosure_policy | - | yes |
| security.pci | - | yes |
| security.soc2 | - | yes |

## Capabilities (Construction Bid Management)

| Capability | iSqFt | STACK Estimating |
|---|:--:|:--:|
| **Capabilities** |  |  |
| Deployment model | Two sided network marketplace | - |
| Digital plan room document distribution | ✓ | - |
| Mass itb invitation to bid email blasting | ✓ | - |
| Side by side bid leveling comparison | - | - |
| Subcontractor prequalification and compliance | - | - |
| Historical subcontractor performance scoring | - | - |
| Automated addenda and revision notifications | - | - |
| Public open project lead bulletin boards | ✓ | - |
| Direct integration to construction ERP project management | - | - |
| Diversity and inclusion mwbe tracking | - | - |
| SOC2 type ii | - | - |
| ISO 27001 | - | - |
| Pricing model | Freemium for subcontractors | - |

*Source: Vioscale. Generated 2026-09-01T16:22:24.306Z. "-" = undocumented, not absent.*