OpenSolar vs TopBuilder Comparison: Reviews, Features, Pricing & Alternatives in 2026

Detailed side-by-side comparison to help you choose the right solution for your team

Updated Apr 2026 8 min read

OpenSolar

0.0 (0 reviews)

OpenSolar is a comprehensive solar design and sales software providing installers with high-definition 3D modeling, accurate shading analysis, and integrated financing tools to streamline the entire project lifecycle.

Starting at Free
Free Trial NO FREE TRIAL
VS

TopBuilder

0.0 (0 reviews)

TopBuilder is a construction-specific CRM and lead management software designed to help home builders, specialty contractors, and real estate professionals streamline sales and follow-up processes.

Starting at --
Free Trial NO FREE TRIAL

Quick Comparison

Feature OpenSolar TopBuilder
Website opensolar.com topbuildersolutions.com
Pricing Model Free Custom
Starting Price Free Custom Pricing
FREE Trial ✘ No free trial ✘ No free trial
Free Plan ✓ Has free plan ✘ No free plan
Product Demo ✓ Request demo here ✓ Request demo here
Deployment cloud mobile saas mobile
Integrations Zapier Nearmap IronRidge Enphase SolarEdge Sunlight Financial GoodLeap Mosaic Salesforce HubSpot Sage Viewpoint QuickBooks Microsoft Outlook Google Calendar Constant Contact Zillow Lasso CRM BIM 360
Target Users freelancer small-business mid-market enterprise small-business mid-market enterprise
Target Industries Renewable Energy Construction construction real-estate
Customer Count 0 0
Founded Year 2017 2008
Headquarters Sydney, Australia Houston, USA

Overview

O

OpenSolar

OpenSolar provides you with a complete end-to-end toolkit to design, sell, and manage solar projects from a single interface. You can create high-definition 3D site models using advanced imagery and conduct precise shading analysis to ensure system accuracy. The platform allows you to generate professional, interactive proposals that include multiple system options and integrated financing, helping you close deals faster while providing a modern experience for your customers.

Beyond sales, you can manage your entire workflow from lead capture to installation using the built-in CRM and project management features. Because the software is supported by hardware and finance partners, you get access to a sophisticated suite of tools without paying monthly subscription fees. It is an ideal solution for solar installation businesses of all sizes looking to scale their operations and reduce overhead costs.

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TopBuilder

TopBuilder is a specialized CRM built specifically for the construction and real estate industries. You can manage your entire sales funnel from initial lead capture to the final contract within a single interface. It solves the common problem of fragmented data by connecting your sales team, marketing efforts, and project management tools. You can automate follow-ups with prospective buyers and subcontractors to ensure no lead falls through the cracks.

The platform integrates directly with industry-standard accounting and ERP systems like Sage and Viewpoint, allowing you to sync project data effortlessly. Whether you are a custom home builder or a large commercial contractor, you can use the built-in email marketing and bid management tools to win more work. It focuses on reducing manual data entry so you can spend more time closing deals and managing active job sites.

Overview

O

OpenSolar Features

  • 3D Design & Modeling Create accurate 3D solar designs with high-resolution imagery and automated shading calculations to ensure peak system performance.
  • Interactive Proposals Send digital, mobile-ready proposals that allow your customers to select options and sign contracts online in real-time.
  • Integrated Financing Access various financing products directly within your proposals so your customers can get instant credit approvals.
  • Built-in CRM Track your leads and manage customer relationships throughout the entire sales funnel without needing external database tools.
  • OpenApi & Webhooks Connect your existing business tools and automate data flow between OpenSolar and your other critical software systems.
  • Mobile App Manage your projects and update site details from the field using native apps for your smartphone or tablet.
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TopBuilder Features

  • Lead Management. Capture and organize leads from your website and listing services automatically so you never miss a sales opportunity.
  • Bid Tracking. Monitor every bid and proposal in real-time to stay on top of deadlines and improve your win rate.
  • Email Marketing. Send branded newsletters and automated follow-up campaigns to keep your prospects engaged throughout the long construction sales cycle.
  • ERP Integrations. Connect your CRM with Sage, Viewpoint, or QuickBooks to sync customer data and project costs without manual entry.
  • Document Management. Store and share contracts, floor plans, and site photos directly within the lead record for easy team access.
  • Workflow Automation. Set up automatic alerts and tasks for your sales team based on lead behavior or project milestones.

Pricing Comparison

O

OpenSolar Pricing

Free
$0
  • Unlimited users and seats
  • Unlimited projects and designs
  • High-definition 3D modeling
  • Interactive digital proposals
  • Integrated CRM and lead tracking
  • Mobile app access
T

TopBuilder Pricing

Pros & Cons

M

OpenSolar

Pros

  • Completely free to use with unlimited user seats
  • Highly accurate 3D modeling and shading analysis
  • Professional interactive proposals impress potential customers
  • Frequent software updates and new feature releases
  • Excellent mobile functionality for field sales teams

Cons

  • Initial setup and configuration takes significant time
  • Steep learning curve for advanced design features
  • Occasional slow loading times with high-res imagery
A

TopBuilder

Pros

  • Deep integration with construction accounting software like Sage
  • Industry-specific templates for home builders and contractors
  • Excellent customer support that understands construction workflows
  • Centralizes lead communication in one easy-to-access location

Cons

  • Initial setup and integration can take significant time
  • User interface feels dated compared to modern generic CRMs
  • Mobile app functionality is limited compared to desktop version
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