COMPARISONS

OpusFlow vs Gaussol Features Comparison

OpusFlow's features and community driven approach make it the best Gaussol alternative you can wish for.

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Find out how OpusFlow stacks up against Gaussol
Join over 3.000 installers using OpusFlow

Why Switch?

If you’re comparing Gaussol with OpusFlow, you’re likely looking for a platform that can support the full lifecycle of your installation business, not just individual steps. OpusFlow brings your sales, planning, design, operations, CRM and more into one cohesive system, giving you clarity and control from start to finish. It’s designed to help installers work more efficiently, and build a smoother, more scalable business.

OpusFlow vs Gaussol
at a glance

The features that matter most to your business, compared side by side.

Gaussol

€50-€540/month
Per licence

OpusFlow

€99
Per License
Fully Cloud-Based
Yes, native included
Yes, native included
User Management
No data available
Yes, native included
Heat Pump Calculator
Not included
Yes, native included
Solar Design Software
Yes, native included
Yes, native included
CRM
No data available
Yes, native included
Customer Portal
Not included
Yes, native included
Invoicing (Accounts)
No data available
Yes, native included
Purchasing & Stock
No data available
Yes, native included
Planning
No data available
Yes, native included
Internal dashboarding
No data available
Yes, native included
Internal Tickets & Chats
Not included
Yes, native included
Internal Forms & Site Survey Forms
Yes, native included
Yes, native included
Document Management
No data available
Yes, native included
Custom built & DIY automations for workflow
No data available
Yes, native included
Warehouse Management
Not included
Yes, native included
Project Management
Yes, native included
Yes, native included
Battery Calculator
Not included
Yes, native included
AI Data Assistant
Not included
Yes, native included
Time Registrations
Not included
Yes, native included
Open API
Not included
Yes, native included
Quotations
Yes, native included
Yes, native included
Contract Management
Not included
Yes, native included

Gaussol

€50-€540/month
Per licence

OpusFlow

€99
All-in-one Price
Fully Cloud-Based
Gaussol
OpusFlow
Yes, native included
Yes, native included
User Management
Gaussol
OpusFlow
No data available
Yes, native included
Heat Pump Calculator
Gaussol
OpusFlow
Not included
Yes, native included
Solar Design Software
Gaussol
OpusFlow
Yes, native included
Yes, native included
CRM
Gaussol
OpusFlow
No data available
Yes, native included
Customer Portal
Gaussol
OpusFlow
Not included
Yes, native included
Invoicing (Accounts)
Gaussol
OpusFlow
No data available
Yes, native included
Purchasing & Stock
Gaussol
OpusFlow
No data available
Yes, native included
Planning
Gaussol
OpusFlow
No data available
Yes, native included
Internal dashboarding
Gaussol
OpusFlow
No data available
Yes, native included
Internal Tickets & Chats
Gaussol
OpusFlow
Not included
Yes, native included
Internal Forms & Site Survey Forms
Gaussol
OpusFlow
Yes, native included
Yes, native included
Document Management
Gaussol
OpusFlow
No data available
Yes, native included
Custom built & DIY automations for workflow
Gaussol
OpusFlow
No data available
Yes, native included
Warehouse Management
Gaussol
OpusFlow
Not included
Yes, native included
Project Management
Gaussol
OpusFlow
Yes, native included
Yes, native included
Battery Calculator
Gaussol
OpusFlow
Not included
Yes, native included
AI Data Assistant
Gaussol
OpusFlow
Not included
Yes, native included
Time Registrations
Gaussol
OpusFlow
Not included
Yes, native included
Open API
Gaussol
OpusFlow
Not included
Yes, native included
Quotations
Gaussol
OpusFlow
Yes, native included
Yes, native included
Contract Management
Gaussol
OpusFlow
Not included
Yes, native included
Not listed in public documentation as of June 4, 2026
Join over 3.000 installers using OpusFlow
"By using OpusFlow, we were able to centralise our processes and massively increase efficiency. Our cost-per-quote ratio has certainly decreased by 50% as a result."

Reasons to choose OpusFlow

Most platforms track your projects. OpusFlow tracks your margins. Built from the ground up for solar and sustainable energy installers, it connects every job, every euro, and every team member in one system.

Below, we break down some of OpusFlow’s key capabilities that make it a powerful all-in-one alternative in the Gaussol vs OpusFlow comparison.

Bring your entire operational workflow into OpusFlow all-in-one system

OpusFlow is designed as a single platform that covers the full lifecycle of an installation project. Sales activities, project planning, documentation, communication, and financial processes all live in one connected environment, eliminating the need to switch between multiple tools.

With one system as the backbone of your business, information stays consistent and accessible across teams. This reduces errors, improves collaboration, and gives you clear oversight of everything that’s happening, from first lead to final delivery.

OpusFlow creates a clear and professional customer journey

OpusFlow helps you manage customer relationships with clarity and structure throughout the entire journey. All interactions, documents, and project updates are stored centrally, giving your team a complete view of each customer at every stage.

Customers benefit from clear communication through Customer Portal, timely updates, and easy access to information, while your team avoids miscommunication and duplicated work. This structured approach builds trust, improves satisfaction, and supports long-term customer relationships.

OpusFlow supports business growth across multiple renewable technologies

OpusFlow is built for installation businesses that want to expand beyond solar. The platform supports a wide range of renewable technologies, including heat pumps, battery storage, EV chargers, wind turbines, and future energy solutions.

As your offering grows, OpusFlow adapts without adding complexity. You can manage different project types, technologies, and teams within the same system, giving you the flexibility to grow your business while maintaining operational control.

Battery calculator | OpusFlow
Automations | OpusFlow

Automate your processes with OpusFlow to keep projects moving efficiently

OpusFlow automation tools help streamline everyday operations by removing manual steps from your workflow. Tasks, reminders, updates, and follow-ups are triggered automatically as projects progress through different phases.

This automation improves reliability and consistency across projects. Your team spends less time coordinating work and more time delivering results, allowing the business to operate faster without increasing workload.

Connect with thousands of tools through extensive API integrations

OpusFlow integrates with over 6,000 external tools, allowing you to connect the platform seamlessly with the systems you already use. From accounting and CRM tools to marketing, analytics, and custom software, data can flow automatically between platforms.

These integrations give you flexibility and future-proof your setup. OpusFlow becomes the central operational hub of your business while remaining open and adaptable to your evolving technology stack.

API integrations | OpusFlow
Primary benefits of ERP systems - Opusflow

OpusFlow has all the solutions for your business

Empower your business with OpusFlow: a comprehensive solution for all your needs.

Customer Testimonials

Making the switch is a big decision. These companies made it, and here’s what changed.

“With OpusFlow, we can quote as much as we need without worrying about hidden costs. That’s a big deal when you’re growing.”
Stijn de Rooij - Co-owner
Zenovo
“The transition to OpusFlow has been a game-changer for Smart-NRG and I would highly recommend it to other solar installation companies for its all-in-one solution and cost-effective benefits.”
Smart-NRG
Bart Wansink - Director
Smart-NRG
“The ability to adapt our own formats and processes without depending on consultants gives us the freedom to grow and develop as a company.”
David van Duijnhoven - Co-owner
100% ZONNIG.nl

FAQ

Everything you want to know before booking a demo.

Is OpusAI included?

Yes, OpusAI is included in every contract. A usage rate limit applies, but if you need more you can increase your limit at minimal cost.

How can tickets be created in OpusFlow?

Tickets can be created through several routes: logged manually by your team after a phone call, parsed directly from an incoming email, or submitted by the customer themselves through the Customer Portal. However a request comes in, it ends up in the same structured queue — so nothing gets handled informally through a personal inbox and nothing falls through the cracks.

How accurate are the solar yield and ROI projections?

Solar yield calculations are based on real localised irradiance data, factoring in the exact orientation, tilt, and shading conditions entered during the design. The ROI model incorporates current energy tariffs, applicable subsidies, and hardware degradation curves to build a 25-year projection. For the Dutch market, additional levers are available including feed-in cost modeling and salderingsregeling phase-out scenarios. The methodology is consistent across every consultant, so the numbers your team presents reflect the same underlying model every time.

Which 3D scanning tools does OpusFlow work with?

OpusFlow accepts scans from iPhone Pro (via LiDAR), Matterport, Polycam, and other scanners that export in OBJ, STL, GLTF, or GLB formats. The scan is processed directly in the browser — no file upload to a server is required, which keeps the process fast and keeps your customer data on-device during the calculation.

How does the automated invoicing work?

When a project reaches the invoicing stage, OpusFlow pulls the line items directly from the project’s Bill of Materials and generates the invoice automatically, with correct quantities, pricing, and totals already populated. For service contracts, you set a billing frequency at the start and the system generates and sends invoices on schedule without anyone triggering it manually. A built-in dry-run mode lets you simulate a billing cycle before it goes live.

Can my sales team build quotes and ROI proposals on-site?

Yes. OpusFlow includes a built-in PV designer, energy simulation engine, heatpump and ROI calculator. Your sales consultants can design the system, model a 25-year financial projection, and hand the client a professional proposal all in a single appointment, without waiting for back-office sign-off.

How granular is the role and permission system?

Very. OpusFlow’s Role-Based Access Control lets you define permissions at the individual module, record type, and field level. You can restrict a user to read-only access on financial data while giving them full edit rights on projects, for example. Permissions are assigned via profiles that you can apply to multiple users at once, so updating a role type updates everyone assigned to it in a single action.

See how OpusFlow stacks up against others

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