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Head-to-head · HVAC Estimating Software

Trimble AutoBid Mechanical vs STACK

  • Updated Oct 2026
  • Both researched from official sources
  • 1 check side by side
Higher score Trimble AutoBid Mechanical #1 in HVAC Estimating Software 9.1/10 Pricing on request ✓ 0 of 6 features Visit Trimble
STACK #3 in HVAC Estimating Software 7.8/10 Free plan · 7-day trial Free planFree trial✓ 0 of 6 features Visit STACK

Trimble AutoBid Mechanical leads on 0 checks, STACK on 0, and 1 is even. Who comes out ahead on the 1 yes/no, price and count check where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scoreTrimble AutoBid Mechanical · 9.1/10
  • Free planonly STACK
  • Free trialonly STACK

Trimble AutoBid Mechanical scores higher on our rubric for hvac estimating software: 9.1 against 7.8 out of 10; our editors rank them #1 and #3.

Trimble AutoBid Mechanical is the better fit for mechanical contractors pricing specification-driven bids. STACK is the better fit for teams needing broad takeoff and estimating workflows.

  • Trimble AutoBid Mechanical fits best

    Mechanical contractors pricing specification-driven bids

  • STACK fits best

    Teams needing broad takeoff and estimating workflows

Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.

Side by side

Feature Trimble AutoBid Mechanical 9.1/10 Visit ↗ STACK 7.8/10 Visit ↗
At a glance
Editor score 9.1 7.8
Ranking #1 in HVAC Estimating Software #3 in HVAC Estimating Software
Best for Mechanical contractors pricing specification-driven bids Teams needing broad takeoff and estimating workflows
Pricing model Paid Free plan + paid
Starting price Pricing on request —
Free plan Not checked yet ✓ (best)
Free trial — 7 days
Support Email, Community Email, Live chat, Phone, Community, Docs
Built for Small business, Mid-market, Enterprise Solo, Small business, Mid-market, Enterprise
Features Trimble AutoBid Mechanical 0/6 · STACK 0/6
HVAC cost database Not checked yet Not checked yet
Labor-rate database Not checked yet Not checked yet
HVAC takeoff tools Not checked yet Not checked yet
Proposal builder Not checked yet Not checked yet
Job costing Not checked yet Not checked yet
QuickBooks sync Not checked yet Not checked yet
Specs
Mobile apps Not checked yet Not checked yet
Our review
Pros
  • Specification-driven digital takeoffs for commercial and industrial work
  • Automatic fitting generation with pre-built construction assemblies
  • Built-in MCAA and PHCC labor units plus material pricing services
  • Digital measurements, markups, overlays, and drawing comparisons
  • Labor, material, item, and assembly estimating worksheets
  • Web, desktop, mobile access with accounting and ERP integrations
Cons
  • Pricing requires contacting Trimble sales
  • Focused on mechanical, piping and plumbing estimating workflows
  • Support is provided through email and community channels
  • Workflows are construction-wide rather than HVAC-specific
  • ERP connectors are available only as a Pro add-on
  • Free plan focuses on viewing, markup, and core takeoff tools
Our verdict

Trimble AutoBid Mechanical is estimating software for commercial and industrial mechanical, piping and plumbing contractors. It is designed for specialty contractors and estimators preparing specification-driven bids, with digital…

Read the review →

STACK is a cloud-based construction preconstruction platform for specialty contractors, general contractors, suppliers, manufacturers, owners, and developers. Its Takeoff & Estimate product lets HVAC teams upload digital plans, mark up…

Read the review →
  1. Trimble AutoBid MechanicalHVAC Estimating Software 9.1Pricing on request
  2. STACKHVAC Estimating Software 7.8Free plan · 7-day trial

Strengths and trade-offs

  • Trimble AutoBid Mechanical — where it wins

    • Specification-driven digital takeoffs for commercial and industrial work
    • Automatic fitting generation with pre-built construction assemblies
    • Built-in MCAA and PHCC labor units plus material pricing services

    Where it doesn't

    • Pricing requires contacting Trimble sales
    • Focused on mechanical, piping and plumbing estimating workflows
    • Support is provided through email and community channels

  • STACK — where it wins

    • Digital measurements, markups, overlays, and drawing comparisons
    • Labor, material, item, and assembly estimating worksheets
    • Web, desktop, mobile access with accounting and ERP integrations

    Where it doesn't

    • Workflows are construction-wide rather than HVAC-specific
    • ERP connectors are available only as a Pro add-on
    • Free plan focuses on viewing, markup, and core takeoff tools
  • Trimble AutoBid Mechanical9.1/10 · Pricing on request

    Specification-focused takeoffs, assemblies, fittings and labor units for mechanical bid teams.

    Visit TrimbleFull verdict →
  • STACK7.8/10 · Free plan · 7-day trial

    Broad digital takeoff and estimating for HVAC teams that need construction-wide workflows.

    Visit STACKFull verdict →

More comparisons

All HVAC estimating software comparisons → · Full ranking →

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Last updated · How we research and update