18.3
Kill Bill is an open-source, programmable billing platform with APIs for pricing models, subscriptions, invoices, and payment gateway integrations.
Free planOpen sourceWebAPILinux
Best Subscription Billing Software in 2026
Kill Bill leads this chart of 49 (8.3/10, free plan). Flexprice is next (8.0/10, free plan), and UniBee is the next highest-placed with a free plan (7.9/10). Subscription billing software manages recurring charges, and the right fit depends on billing controls and the platforms you can use. Compare proration, dunning and tax automation, multi-currency billing, usage-based billing, and a customer portal. On a Xiaomi, Redmi or POCO device, check whether an Android app supports the tasks you need. Web access or an API may suit a different workflow; confirm platform support…
28.0
Free planOpen sourceWebAPILinux
37.9
UniBee is an open-source subscription billing platform available as self-hosted software or managed cloud service.
Free planOpen sourceWebAPISelf-hosted
- 4
Recurly
Recurly is web-based subscription billing software from Recurly, a company founded in 2009 and headquartered in San Francisco.
AndroidiOSWebAPI7.8From $249 a month - 57.8From $39 a month
- 6
7.7From £50 a year - 7
Paymenter
Paymenter is an open-source billing platform tailored to hosting companies.
Free planOpen sourceWebAPILinuxSelf-hosted7.7From €5 a month - 87.6Free plan
- 9
InstaPayments
AndroidiOSWebAPI7.6From $25 a month - 10
PaySimple
PaySimple is a paid platform for business payments, billing, and customer management.
AndroidiOSWebAPI7.6From $49.95 a month - 11
Billsby
Billsby manages subscriptions, recurring billing, invoicing, and customer lifecycle tasks.
Free planWebAPI7.5From $45 a month - 12
Churn Buster
Free planWebAPI7.5From $269 a month - 13
Lago
Lago is an open-source billing platform that links product usage and commercial terms to customer invoices.
Free planOpen sourceWebAPISelf-hosted7.5Free plan - 14
PayWhirl
Web billing for subscriptions, memberships, installments, and recurring invoices, with automated charges and retries.
Free planWebAPI7.4From $9 a month - 15
Rerun
Web app for membership and subscription invoices, with recurring card and ACH payments.
Free planWeb7.4$1.49 one-time - 16
Younium
Android and iOS tools for B2B software firms to link quotes, subscriptions and billing.
AndroidiOSWebAPI7.4From 500 SEK a month - 17
Fakturia
WebAPI7.3From €1.90 a month - 18
Pabbly Subscriptions
Free planWebAPI7.3From $14 a month - 19
FOSSBilling
Free, open-source billing with recurring invoices, reminders, multiple currencies, and hosting account provisioning.
Free planOpen sourceWebAPILinuxSelf-hosted7.2Free plan - 20
GetPaidHQ
Self-hosted, open-source subscription billing with flexible pricing, payment routing, and processor adapters.
Free planOpen sourceWebAPISelf-hosted7.1Free plan - 21
Meteroid
SaaS revenue tools for metering activity, setting flexible rates and managing quotes and invoices.
Open sourceWebAPISelf-hosted7.1From €219 a month - 22
ChargeOver
WebAPI6.7From $229 a month - 23
Tridens Monetization
Software for managing charges and income across subscription, usage-based and mixed plans.
WebAPI6.7From $500 a month - 24
Maxio
Web and API software for subscription billing and customer payments, from $599 per month.
WebAPI6.5From $599 a month - 25
BillingPlatform Accounts Receivable
Tools for receivables, collecting payments, issuing credits and refunds, and tracking overdue accounts.
WebAPI6.4
Choosing well
Does it support the way I bill customers?
Compare usage-based billing and proration controls if charges change with customer activity or mid-cycle changes. The listed comparison also covers dunning and tax automation, multi-currency billing, and customer billing portals.
Kill Bill, Lago, PayWhirl, Churn Buster, FOSSBilling, Pabbly Subscriptions, Paymenter and UniBee are listed with free plans.
Can I use it on Android or the web?
Check platform availability against how you plan to manage billing. Android is listed for eight tools, while web access is listed for 48; API, self-hosted, iOS and Linux options are also covered.
For Xiaomi, Redmi and POCO phones, verify that an Android app covers the tasks you need. The platform facts do not establish Xiaomi- or HyperOS-specific support.
Can I start with a free plan or trial?
Check the pricing details for the tool itself: a free plan, trial, and starting paid price are different things. Listed free-plan examples include Lago and FOSSBilling; PayWhirl lists a 14-day trial and paid plans from $9 per month.
Pricing notes list Kill Bill from $40 per month, Pabbly Subscriptions from $19, Paymenter from $5 and UniBee from $99.
Do I need self-hosting or open-source software?
If you need to manage deployment or inspect code, check for self-hosted availability and an open-source licence. The comparison covers self-hosted platforms, but the listed item facts do not specify individual licensing terms.
Confirm the deployment requirements and available documentation before choosing.
Questions people ask
Which subscription billing software has an Android app?
Android availability is included in the comparison. Check the individual tool's platform details to confirm whether its app supports the billing tasks you need.
What features should I compare in subscription billing software?
Compare free plans, usage-based billing, proration controls, dunning and tax automation, multi-currency billing, and customer billing portals.
Which subscription billing tools offer a free plan?
Listed examples include Kill Bill, Lago, PayWhirl, Churn Buster, FOSSBilling, Pabbly Subscriptions, Paymenter and UniBee. Verify current terms with the provider.
What is the difference between a free plan and a free trial?
A free plan is listed as a pricing option; a trial is time-limited. Check the provider's terms and paid starting price before signing up.