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Head-to-head · HVAC Estimating Software

McCormick Systems vs OneEstimate

  • Updated Sep 2026
  • Both researched from official sources
  • 5 checks side by side
McCormick Systems #2 in HVAC Estimating Software —/10 Pricing on request ✓ 0 of 6 features Visit McCormick
Higher score OneEstimate #5 in HVAC Estimating Software 7.5/10 Free plan · paid from $19/mo Free plan✓ 4 of 6 features Visit OneEstimate

McCormick Systems leads on 0 checks, OneEstimate on 5, and 0 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 scoreOneEstimate · 7.5/10
  • Free planonly OneEstimate
  • Most featuresOneEstimate · 4 of 6

Our editors rank McCormick Systems at #2 and OneEstimate at #5 for hvac estimating software; McCormick Systems has no rubric score yet (facts researched, not yet scored), so the checks below decide.

OneEstimate offers free plan; McCormick Systems doesn't publish it. OneEstimate offers hvac cost database; McCormick Systems doesn't publish it. OneEstimate offers labor-rate database; McCormick Systems doesn't publish it. OneEstimate offers hvac takeoff tools; McCormick Systems doesn't publish it. OneEstimate offers proposal builder; McCormick Systems doesn't publish it.

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. We may earn a commission when you click some links. It never changes our verdict. How we rank.

Side by side

Feature McCormick Systems —/10 Visit ↗ OneEstimate 7.5/10 Visit ↗
At a glance
Editor score — 7.5
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 Not published Not published
Free plan Not published ✓ (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 published ✓ (best)
Labor-rate database Not published ✓ (best)
HVAC takeoff tools Not published ✓ (best)
Proposal builder Not published ✓ (best)
Job costing Not published Not published
QuickBooks sync Not published Not published
Specs
Mobile apps Not published Not published
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 —Pricing on request
  2. OneEstimateHVAC Estimating Software 7.5Free plan · paid from $19/mo

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

Reviewed by iTechGuides Editors · Editorial team · Updated Sep 2026