App comparison
Add up to 4 apps below to see how they compare. You can also use the "Compare" buttons while browsing.
GetApp offers objective, independent research and verified user reviews. We may earn a referral fee when you visit a vendor through our links.
Our commitment
Independent research methodology
Our researchers use a mix of verified reviews, independent research, and objective methodologies to bring you selection and ranking information you can trust. While we may earn a referral fee when you visit a provider through our links or speak to an advisor, this has no influence on our research or methodology.
Verified user reviews
GetApp maintains a proprietary database of millions of in-depth, verified user reviews across thousands of products in hundreds of software categories. Our data scientists apply advanced modeling techniques to identify key insights about products based on those reviews. We may also share aggregated ratings and select excerpts from those reviews throughout our site.
Our human moderators verify that reviewers are real people and that reviews are authentic. They use leading tech to analyze text quality and to detect plagiarism and generative AI.
How GetApp ensures transparency
GetApp lists all providers across its website—not just those that pay us—so that users can make informed purchase decisions. GetApp is free for users. Software providers pay us for sponsored profiles to receive web traffic and sales opportunities. Sponsored profiles include a link-out icon that takes users to the provider’s website.
Open Source Recurring Billing Software (2026)
Last updated: February 2026
14 software options
Sponsored
Based on GetApp‘s extensive, proprietary database of in-depth, verified user reviews
All-in-one open-source business software
Odoo offers flexible pricing plans to accommodate various business needs. The One App Free plan allows one app and unlimited users for free. The Standard plan starts at $31.10 per user per month (billed annually) and offers all apps. The Custom plan starts at $61.00 per user per month (billed annually) and includes Odoo Studio, Multi-Company, and an External API.
Read more about Odoo
Based on GetApp‘s extensive, proprietary database of in-depth, verified user reviews
More than Invoicing. Powerful Apps to Run Your Business!
Forever Free Ninja Pro: $10/month Enterprise: $14/month - $44/month
Read more about Invoice Ninja
Based on GetApp‘s extensive, proprietary database of in-depth, verified user reviews
Solutions for On-line businesses
Free if installed "On premise". From 9 euros / month with a Saas provider
Read more about Dolibarr
Based on GetApp‘s extensive, proprietary database of in-depth, verified user reviews
In-app subscriptions made easy
Free: Free, up to $10k in monthly tracked revenue Starter: 0.08% of monthly tracked revenue Pro: 1.2% of monthly tracked revenue Enterprise: Contact Us *MTR = Monthly Tracked Revenue
Read more about RevenueCat
Based on GetApp‘s extensive, proprietary database of in-depth, verified user reviews
Open Source Subscription Billing and Payment Platform
Kill Bill is free, open-source software (Apache V2 license).
Read more about Kill Bill
Based on GetApp‘s extensive, proprietary database of in-depth, verified user reviews
Subscription management, recurring billing and payments
Frisbii Subscription Management starts from €49/month. Frisbii Payment Gateway standalone from €19/month + 0,08 cent processing fee + payment method fee Contact us to know more.
Read more about Frisbii
Based on GetApp‘s extensive, proprietary database of in-depth, verified user reviews
Traction for your transactions
Speak to sales@sticky.io for more information on pricing.
Read more about Sticky.io
Based on GetApp‘s extensive, proprietary database of in-depth, verified user reviews
Simplifying Invoices, Amplifying Success
Free trial. Paid version starts from ₹99/month
Read more about NextBill
Based on GetApp‘s extensive, proprietary database of in-depth, verified user reviews
Stop selling product. Start selling recurring services.
Community edition can be downloaded/installed for free.
Read more about Opencell
Based on GetApp‘s extensive, proprietary database of in-depth, verified user reviews
Order to Billing
Please contact us for pricing.
Read more about O2B
Based on GetApp‘s extensive, proprietary database of in-depth, verified user reviews
Subscription+Usage Billing Automation system - SaaS/OnPrem
SaaS - starts @ USD499.00 per month billed annually for upto 10000 customers. Next 2 slabs at upto 25000 customer and higher than 25000. On Premise - Please contact us.
Read more about Simple Billing
Please contact VoPay directly for pricing information.
Read more about VoPay
ERP: 39€/mth(mes) CRM: 29€/mth(mes) ACCOUNTING (Contabilidad): 29€/mth(mes) E-COMMERCE (Tienda On Line): 29€/mth(mes)
Read more about myGESTIÓN
