Buildxact vs Cornerstone PM: Selections Software vs Design Center

Buildxact is an estimating-first platform built for residential builders and remodelers. Cornerstone PM™ is a production home builder platform with a plan-level design center, bundled AI agents, and multi-community vendor workflows. The core difference: Buildxact manages selections per job; Cornerstone PM™ manages them per floorplan — and that architectural choice changes everything for a production builder.

If you're a production home builder evaluating whether an estimating tool can double as your design center, this post gives you the honest answer. For the full platform category overview, start at home builder project management software.

What is Buildxact built for?

Buildxact markets to residential builders, remodelers, and custom home builders who need to move from a floor plan to a priced quote quickly. The core value proposition is speed: upload a floor plan, count quantities, pull supplier pricing from connected catalogs (including direct dealer feeds in Australia and the US), and generate a professional proposal in hours rather than days.

Their three-tier pricing reflects this:

• Foundation ($199/mo)— estimating, quoting, and basic job management
• Pro ($399/mo)— adds client portal, selections tracking, and supplier integrations
• Master ($599/mo)— full feature set with advanced reporting and team permissions

On top of the base plan, Buildxact sells three AI modules under the “Blu” brand at $99–$149/month each:

• Blu Estimate Generator — AI-assisted line-item creation from scope
• Blu Takeoff Assistant — AI quantities from floor plans
• Blu Estimate Reviewer — flags incomplete or inconsistent estimates

For a custom builder or remodeler where every job is unique and fast quoting is the bottleneck, this stack is genuinely well-designed. The issue arises when production builders — who repeat the same plans across dozens or hundreds of homes — ask Buildxact to serve as their design center and vendor bidding platform. That's not what it was built to do.

What's the difference between selections software and a design center?

This is the question at the heart of the Buildxact vs Cornerstone PM™ comparison, and the distinction matters more than most builders realize before they hit it.

Selections software manages buyer choices at the job level. Each home is an independent project. The buyer of Lot 12 picks their flooring, and the buyer of Lot 13 picks theirs. Every selection is entered per-job, tracked per-job, and invoiced per-job. This is the right model for a custom builder where no two homes are alike.

A production design centeroperates at the floorplan level. The Magnolia plan has a kitchen options package. That package is priced once, attached to the Magnolia plan, and reused for every Magnolia you sell — in every community, across every buyer. When vendor pricing changes, you update it once and it propagates everywhere. When a buyer picks the Coastal Designer Package in your design appointment, every option in the kitchen category auto-locks to that package's selections. No per-job re-entry.

Buildxact has a selections module. It does not have a production design center. Selections in Buildxact are managed per-job as allowance-style budget line items — the same model that CoConstruct and early Buildertrend used, and the model that production builders hit a wall with once they're repeating plans at scale.

How Cornerstone PM™'s design center works

The Cornerstone PM™ design center is built around the production workflow specifically. Here's what that means in practice:

• 64 curated Designer Packagesacross 7 categories. When a buyer selects a package, every option in that category auto-locks to the package. If they want to go à la carte, they unlock individual options from there.
• Per-floorplan options pricing.The Magnolia plan's options are priced at the plan level. Sell 100 Magnolias across 5 communities and those options follow automatically — no re-entry per lot.
• Structural vs Designer scope separation. Bid templates sent to vendors filter scope by trade — your framing crew sees Structural scope only; your interior designer sees Designer scope only. Buildxact sends one undifferentiated estimate.
• Area Cost Pricing. Community-level extras (lot premiums, community upgrade fees) layer on top of base floorplan pricing without touching the base plan.
• Zero filler pricing.Every dollar shown to a buyer traces to actual vendor pricing — no synthetic splits or estimator fudging.

For the full platform overview, see Cornerstone PM™ for production home builders.

Feature comparison: Buildxact vs Cornerstone PM™

“Partial” for Buildxact AI takeoff reflects the Blu Takeoff Assistant add-on ($99/mo extra). Cornerstone PM™'s Blueprint AI is bundled.

AI: bundled vs add-on

The AI pricing model difference deserves its own section because it compounds quickly at the platform level.

Buildxact's Master plan is $599/month. Add Blu Takeoff Assistant ($99/mo) and Blu Estimate Generator ($149/mo) and you're at $847/month — for AI features that are estimating-only and don't touch your design center, vendor bidding, or purchasing workflow.

Cornerstone PM™'s Pro+ plan is also $599/month and bundles five AI agents with zero add-on fees:

• Blueprint AI— parses a floor plan PDF and extracts 130+ material scopes in under 60 seconds. See Blueprint AI →
• Foreman AI— an in-app agent with 396+ skills covering purchasing workflows, vendor management, schedule optimization, budget reports, and profitability analysis. Foreman reads AND writes data — it takes real actions, not just chat. Meet Foreman →
• Bid Import AI— auto-maps vendor bid spreadsheets to your scope items, eliminating manual column matching.
• AI MLS Listing Generator— generates listing copy directly from your floorplan and options data.
• AI Support Agent— answers platform questions in context without leaving your workflow.

Buildxact's AI is estimating-focused by design. Cornerstone PM™'s AI was built around the full production-builder operation — from takeoff through vendor bid management to buyer-facing design.

Vendor bidding: where Buildxact stops and Cornerstone PM™ continues

Buildxact handles quotes and cost estimation well. Once a quote is accepted and work starts, vendor management is handled through basic contact records and purchase orders. There is no structured bid-request workflow, no vendor bid portal, and no side-by-side bid comparison.

Production home builders manage vendor bidding at a different level of complexity:

• Send structured bid requests to multiple vendors per scope, with auto-generated Excel bid templates scoped to each vendor's trade
• Vendors submit through a token-protected portal — no Cornerstone account required
• Side-by-side bid comparison when 2+ vendors respond
• Bids lock on acceptance — protecting awarded pricing from post-award edits
• Community-assigned vendor wins: the framing crew for Community A can differ from Community B for the same scope

For the full purchasing workflow, see Cornerstone PM purchasing overview.

Who should use each platform?

Buildxact does estimating well. The problem isn't that it's weak — it's that production home building requires a different product category. If you're a production builder evaluating platforms, compare options on the full comparison page or read the home builder software category guide to understand what each platform was built to solve.