Commercial Licensing

Use FluxParser in proprietary software without GPL restrictions

GPL-3.0

$ 0 forever

For open-source projects

  • ✅ Full source code
  • ✅ All features
  • ✅ Unlimited users
  • ✅ Educational use
  • ✅ Research use
  • ⚠️ Must release your code as GPL-3.0
  • Community support only
Get on GitHub

Startup

$ 299 /year

For small teams

  • ✅ Use in proprietary software
  • ✅ No GPL restrictions
  • ✅ Up to 5 developers
  • ✅ 1 commercial product
  • ✅ Email support (48h)
  • ✅ All updates
  • 30-day money-back guarantee
Purchase

Enterprise

Custom

For large organizations

  • ✅ Everything in Business
  • ✅ Custom features
  • ✅ Dedicated support (4h)
  • ✅ Training & onboarding
  • ✅ Source code escrow
  • ✅ Custom SLA
  • Volume discounts available
Contact Sales

License Comparison

Feature GPL-3.0 Startup Business Enterprise
All Parser Features
Source Code Access
Use in Proprietary Software
Number of Developers Unlimited Up to 5 Unlimited Unlimited
Number of Products Unlimited 1 Unlimited Unlimited
Support Response Time Community 48 hours 24 hours 4 hours
Support Channel GitHub Issues Email Email + Slack Dedicated
Custom Features
Training & Onboarding
Source Code Escrow

Frequently Asked Questions

What's the difference between GPL and Commercial?

GPL-3.0 requires you to release your entire application's source code under GPL. Commercial license allows you to keep your code proprietary.

Can I evaluate before purchasing?

Yes! Use the free GPL version for evaluation. When ready for production deployment, purchase a commercial license.

What happens after the license expires?

You can continue using the version you have, but won't receive updates or support. Renew annually to continue receiving updates.

Do you offer perpetual licenses?

Yes! Contact us for perpetual licensing. Typically 5x the annual price with optional paid maintenance.

Can I upgrade my license tier?

Absolutely! Contact us to upgrade from Startup to Business or Enterprise. We'll pro-rate the difference.

Do you offer discounts?

Yes! Multi-year discounts (10% for 2 years, 20% for 3 years), non-profit discounts (50%), and volume discounts for Enterprise.

What payment methods do you accept?

Credit card, PayPal, bank transfer, and purchase orders for Enterprise customers.

Is there a refund policy?

30-day money-back guarantee, no questions asked. If you're not satisfied, we'll refund 100%.

Why Companies Choose Us

"The only C parser with symbolic calculus. Saved us months of development time."

— CTO, SciTech Startup

"Excellent performance and double precision was exactly what we needed for financial modeling."

— Lead Engineer, FinTech Company

"Support is fantastic. They helped us integrate in 2 days."

— Developer, EdTech Platform

Ready to Get Started?

Choose the license that fits your needs

Questions? Email us at eduardostern@icloud.com