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

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

Updated May 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

Trello

0.0 (0 reviews)

Trello is a visual project management tool that uses boards, lists, and cards to help you organize tasks, collaborate with teammates, and track project progress from start to finish.

Starting at Free
Free Trial 14 days

Quick Comparison

Feature OpenSolar Trello
Website opensolar.com trello.com
Pricing Model Free Freemium
Starting Price Free Free
FREE Trial ✘ No free trial ✓ 14 days free trial
Free Plan ✓ Has free plan ✓ Has free plan
Product Demo ✓ Request demo here ✓ Request demo here
Deployment cloud mobile cloud mobile desktop
Integrations Zapier Nearmap IronRidge Enphase SolarEdge Sunlight Financial GoodLeap Mosaic Salesforce HubSpot Slack Google Drive Dropbox Microsoft Teams GitHub Jira Salesforce Confluence Evernote Mailchimp
Target Users freelancer small-business mid-market enterprise freelancer solopreneur small-business mid-market
Target Industries Renewable Energy Construction
Customer Count 0 0
Founded Year 2017 2011
Headquarters Sydney, Australia New York, 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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Trello

Trello is a visual collaboration tool that helps you manage projects and organize tasks using a simple board-and-card system. Instead of digging through messy spreadsheets or long email chains, you can see your entire workflow at a glance. You can move cards across different stages of completion, assign tasks to team members, and set due dates to keep everyone on schedule.

The platform is designed to be flexible enough for any type of work, from software development and marketing campaigns to personal to-do lists. You can enhance your boards with 'Power-Ups' that connect your favorite tools directly into your workflow. Whether you are a freelancer managing one project or a large team coordinating hundreds, Trello scales with you by offering a robust free version and tiered paid plans starting at $5 per user per month.

Overview

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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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Trello Features

  • Kanban Boards. Organize your projects into visual stages using drag-and-drop boards that show you exactly who is doing what.
  • Butler Automation. Create custom rules and commands to automate repetitive tasks like moving cards or sending deadline alerts without writing code.
  • Advanced Checklists. Break down complex tasks into smaller steps and assign individual sub-tasks to specific team members for better accountability.
  • Power-Ups. Connect your boards to tools like Slack, Google Drive, and GitHub to see live data without leaving Trello.
  • Timeline View. Plan your project schedule on a visual timeline to track dependencies and ensure your team meets every deadline.
  • Mobile Sync. Update your tasks and respond to comments on the go with native apps that keep your data synced across all devices.

Pricing Comparison

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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

Trello Pricing

Free
$0
  • Unlimited cards
  • Up to 10 boards per Workspace
  • Unlimited Power-Ups per board
  • 250 Workspace command runs/month
  • Unlimited activity log
  • Mobile apps for iOS and Android

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

Trello

Pros

  • Extremely intuitive interface requires almost no training
  • Generous free plan includes unlimited integrations
  • Highly flexible for both professional and personal use
  • Visual nature makes project status immediately clear

Cons

  • Limited reporting features compared to specialized tools
  • Can feel cluttered when managing very large projects
  • Advanced views like Timeline require paid upgrades
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