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Head-to-head · HVAC Estimating Software

CavSoft Evolution vs OneEstimate

  • Updated Oct 2026
  • Both researched from official sources
  • 5 checks side by side
Higher score CavSoft Evolution #4 in HVAC Estimating Software 7.8/10 Pricing on request ✓ 3 of 6 features Visit CavSoft
OneEstimate #5 in HVAC Estimating Software 7.7/10 Free plan Free plan✓ 4 of 6 features Visit OneEstimate

CavSoft Evolution 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 scoreCavSoft Evolution · 7.8/10
  • Free planonly OneEstimate
  • Most featuresOneEstimate · 4 of 6

CavSoft Evolution scores higher on our rubric for hvac estimating software: 7.8 against 7.7 out of 10; our editors rank them #4 and #5.

CavSoft Evolution is the better fit for HVAC estimators preparing plan-based project proposals. OneEstimate is the better fit for small HVAC teams wanting low-cost takeoff and proposals.

  • CavSoft Evolution fits best

    HVAC estimators preparing plan-based project proposals

  • 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 CavSoft Evolution 7.8/10 Visit ↗ OneEstimate 7.7/10 Visit ↗
At a glance
Editor score 7.8 7.7
Ranking #4 in HVAC Estimating Software #5 in HVAC Estimating Software
Best for HVAC estimators preparing plan-based project proposals 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
Built for Small business, Mid-market Solo, Small business, Mid-market
Features CavSoft Evolution 3/6 · OneEstimate 4/6
HVAC cost database Not checked yet ✓ (best)
Labor-rate database ✓ ✓
HVAC takeoff tools ✓ ✓
Proposal builder ✓ ✓
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
  • Combines labor installation times and material costs in estimates
  • Drawing overlays help compare plan revisions and project changes
  • Customizable assemblies and customer-facing proposals support bid preparation
  • 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 is handled through sales rather than published plans
  • Browser access depends on an internet connection
  • No dedicated iOS or Android apps are documented
  • 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

CavSoft Evolution is cloud-based estimating and takeoff software for HVAC contractors. It is aimed at estimators who prepare project proposals from plans and need labor installation times and material costs represented in their estimates.…

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. CavSoft EvolutionHVAC Estimating Software 7.8Pricing on request
  2. OneEstimateHVAC Estimating Software 7.7Free plan

Strengths and trade-offs

  • CavSoft Evolution — where it wins

    • Combines labor installation times and material costs in estimates
    • Drawing overlays help compare plan revisions and project changes
    • Customizable assemblies and customer-facing proposals support bid preparation

    Where it doesn't

    • Pricing is handled through sales rather than published plans
    • Browser access depends on an internet connection
    • No dedicated iOS or Android apps are documented

  • 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