Head-to-head · HVAC Estimating Software
McCormick Systems vs 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
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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 | ||
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| Cons |
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| 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 → |
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
- McCormick Systems—/10 · Pricing on request
A trade-focused estimating suite for MEP contractors working from PDF plans.
Visit McCormickFull verdict → - OneEstimate7.5/10 · Free plan · paid from $19/mo
HVAC-focused takeoff and proposals with a permanent free tier and web delivery.
Visit OneEstimateFull verdict →
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All HVAC estimating software comparisons → · Full ranking →
Reviewed by iTechGuides Editors · Editorial team · Updated Sep 2026


