01
OpenMeter
Metering and Billing for AI, API and DevOps. Collect and aggregate millions of usage events in real-time and enable usage-based billing.
Health95
Shipping94
Score95
Confidence90
Stars2.4k
ModeSource-visible project
Subscription Billing
Alternatives to Flexprice
Compare healthier or more active tools in the same use case using ToolVitals public evidence.
Why compare
Signals behind this alternatives page
- Commit continuity, contributor activity, and delivery signals are strong.
- Health score: 97/100.
- Shipping score: 97/100.
Switching guide
Best alternatives by need
Verified open/source-visibleOpenMeter, Panelica, Lago, Kill Bill
Useful when portability and inspectability matter.
Ranked alternatives
Best-fit subscription billing options
Active
02
Panelica
🧾 Open-source WHMCS alternative — self-hosted hosting billing & client portal. Laravel 13 + MySQL. Invoicing, domains, SSL, tickets, reseller, multi-language (30 locales), 15 themes. Free & MIT-licensed.
Health94
Shipping96
Score95
Confidence90
Stars111
ModeSource-visible project
03
Lago
Open Source Metering and Usage Based Billing API ⭐️ Consumption tracking, Subscription management, Pricing iterations, Payment orchestration & Revenue analytics
Health92
Shipping87
Score90
Confidence90
Stars10.7k
ModeSource-visible project
04
Kill Bill
Open-Source Subscription Billing & Payments Platform
Health91
Shipping88
Score90
Confidence90
Stars5.8k
ModeSource-visible project
05
Autumn
Autumn is an open-source pricing & billing platform
Health93
Shipping89
Score91
Confidence90
Stars2.8k
ModeSource-visible project
06
FOSSBilling
Empower your hosting business with FOSSBilling, the free and open-source solution for efficient billing and client management.
Health95
Shipping93
Score94
Confidence90
Stars1.7k
ModeSource-visible project
07
KeyGate
Open source license management platform with subscriptions and usage metering.
Health89
Shipping85
Score87
Confidence90
Stars173
ModeSource-visible project
08
REMP
Open-source tools for publisher engagement and monetization.
Health90
Shipping87
Score89
Confidence90
Stars137
ModeSource-visible project
09
BillRun
Open source billing and fraud detection system.
Health91
Shipping84
Score88
Confidence90
Stars132
ModeSource-visible project
10
Ubilling
Open-source billing system for ISP and network service management.
Health83
Shipping84
Score83
Confidence90
Stars186
ModeSource-visible project
11
Billmora
Open-source billing management with recurring automation and provisioning.
Health81
Shipping80
Score81
Confidence90
Stars19
ModeSource-visible project
12
PayKit
The billing framework for TypeScript. Code-first products, handles Stripe, webhooks, and usage state, runs in your app.
Health77
Shipping83
Score79
Confidence90
Stars1.1k
ModeSource-visible project