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Head-to-head · HVAC Estimating Software

McCormick Systems vs OneEstimate

  • Updated Oct 2026
  • Both researched from official sources
  • 5 checks side by side
Higher score McCormick Systems #2 in HVAC Estimating Software 8.3/10 Pricing on request ✓ 0 of 6 features Visit McCormick
OneEstimate #5 in HVAC Estimating Software 7.7/10 Free plan Free plan✓ 4 of 6 features Visit OneEstimate

McCormick Systems leads on 0 checks, OneEstimate on 0, and 5 are even. Who comes out ahead on the 5 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scoreMcCormick Systems · 8.3/10
  • Free planonly OneEstimate
  • Most featuresOneEstimate · 4 of 6

McCormick Systems scores higher on our rubric for hvac estimating software: 8.3 against 7.7 out of 10; our editors rank them #2 and #5.

McCormick Systems is the better fit for contractors needing detailed multi-trade takeoff. OneEstimate is the better fit for small HVAC teams wanting low-cost takeoff and proposals.

  • McCormick Systems fits best

    Contractors needing detailed multi-trade takeoff

  • OneEstimate fits best

    Small HVAC teams wanting low-cost takeoff and proposals

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 McCormick Systems 8.3/10 Visit ↗ OneEstimate 7.7/10 Visit ↗
At a glance
Editor score 8.3 7.7
Ranking #2 in HVAC Estimating Software #5 in HVAC Estimating Software
Best for Contractors needing detailed multi-trade takeoff Small HVAC teams wanting low-cost takeoff and proposals
Pricing model Paid Free plan + paid
Starting price Pricing on request $19/mo
Free plan Not checked yet ✓ (best)
Free trial — —
Deployment Cloud Cloud
Platforms Web Web
Integrations 1 integrations 1 integrations
Built for Small business, Mid-market, Enterprise Solo, Small business, Mid-market
Features McCormick Systems 0/6 · OneEstimate 4/6
HVAC cost database Not checked yet ✓ (best)
Labor-rate database Not checked yet ✓ (best)
HVAC takeoff tools Not checked yet ✓ (best)
Proposal builder Not checked yet ✓ (best)
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
  • PDF takeoff with automated material counting and measurement
  • Electrical, plumbing, and mechanical databases with prebuilt assemblies
  • Tracks supplier pricing, bid costs, and change orders
  • HVAC assemblies cover equipment, ductwork, insulation, and refrigerant
  • On-screen takeoff measures duct runs and counts fixtures or equipment
  • Branded PDF proposals and Excel exports support client-ready estimates
Cons
  • Pricing requires contacting sales
  • Its focus on MEP estimating may not suit other trades
  • FOUNDATION is the only listed integration
  • Free and START plans limit takeoff to one per project
  • The product is available through the web only
  • Business-level BIM support is limited to IFC import
Our verdict

McCormick Systems brings digital takeoff and estimating together for electrical, plumbing, and mechanical contractors. Its workflow starts with PDF plans and extends through material and labor estimates, bid proposals, reporting, and…

Read the review →

OneEstimate is browser-based estimating software tailored to HVAC contractors and small construction teams. Its assemblies cover equipment, ductwork, insulation, refrigerant, diffusers, and grilles, while plan takeoff converts measured…

Read the review →
  1. McCormick SystemsHVAC Estimating Software 8.3Pricing on request
  2. OneEstimateHVAC Estimating Software 7.7Free plan

Strengths and trade-offs

  • McCormick Systems — where it wins

    • PDF takeoff with automated material counting and measurement
    • Electrical, plumbing, and mechanical databases with prebuilt assemblies
    • Tracks supplier pricing, bid costs, and change orders

    Where it doesn't

    • Pricing requires contacting sales
    • Its focus on MEP estimating may not suit other trades
    • FOUNDATION is the only listed integration

  • OneEstimate — where it wins

    • HVAC assemblies cover equipment, ductwork, insulation, and refrigerant
    • On-screen takeoff measures duct runs and counts fixtures or equipment
    • Branded PDF proposals and Excel exports support client-ready estimates

    Where it doesn't

    • Free and START plans limit takeoff to one per project
    • The product is available through the web only
    • Business-level BIM support is limited to IFC import

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