Comparison

Invoice Ninja vs Kill Bill

On the evidence we track, Invoice Ninja leads this comparison with a composite score of 64/100. Scores are only directly comparable because these tools share a category; the full breakdown and every source is below.

Invoice Ninja full profile →Kill Bill full profile →

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★Invoice Ninja64

Kill Bill45

Attribute comparison across 2 tools
Attribute	Invoice NinjaLeader	Kill Bill
Vioscale score	64 / 100high · 75%	45 / 100high · 77%
Pricing
Free tierpricing.free_tier	✓	✓
Modelpricing.model	freemium	commercial
Price levelpricing.price_level	low	mid
Transparentpricing.transparent	✓	✓
Integrations
Countintegrations.count	1,000	9
Security
Gdprsecurity.gdpr	✓	✓
Pcisecurity.pci	✓	✓
Scorecardsecurity.scorecard	3.5	4.5
Soc2security.soc2	✓	-
Vulnerabilitiessecurity.vulnerabilities	Count: 0 · Source: https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=go&package_name=github.com%2Finvoiceninja%2Finvoiceninja&per_page=100 · Last 12m: 0	Count: 0 · Source: https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=maven&package_name=org.kill-bill.billing%3Akillbill-util&per_page=100 · Last 12m: 0
Reliability
Sla pctreliability.sla_pct	-	48
Status pagereliability.status_page	✓	-
Adoption
Dependent reposadoption.dependent_repos	0	15
Github starsadoption.github_stars	10,027	5,703
Activity
Commits last 30dactivity.commits_last_30d	100	35
Release
Cadence daysrelease.cadence_days	2	36
Historyrelease.history	20 items	20 items
License
Spdxlicense.spdx	-	Apache-2.0
Language
Primarylanguage.primary	PHP	Java
Market
Availabilitymarket.availability	Available worldwide	Available worldwide · Popular in US

Score

Vioscale score

Invoice Ninja64 / 100high · 75%

Kill Bill45 / 100high · 77%

Pricing

Free tier

Invoice Ninja✓

Kill Bill✓

Model

Invoice Ninjafreemium

Kill Billcommercial

Price level

Invoice Ninjalow

Kill Billmid

Transparent

Invoice Ninja✓

Kill Bill✓

Integrations

Count

Invoice Ninja1,000

Kill Bill9

Security

Gdpr

Invoice Ninja✓

Kill Bill✓

Pci

Invoice Ninja✓

Kill Bill✓

Scorecard

Invoice Ninja3.5

Kill Bill4.5

Soc2

Invoice Ninja✓

Kill Bill–

Vulnerabilities

Invoice NinjaCount: 0 · Source: https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=go&package_name=github.com%2Finvoiceninja%2Finvoiceninja&per_page=100 · Last 12m: 0

Kill BillCount: 0 · Source: https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=maven&package_name=org.kill-bill.billing%3Akillbill-util&per_page=100 · Last 12m: 0

Reliability

Sla pct

Invoice Ninja–

Kill Bill48

Status page

Invoice Ninja✓

Kill Bill–

Adoption

Dependent repos

Invoice Ninja0

Kill Bill15

Github stars

Invoice Ninja10,027

Kill Bill5,703

Activity

Commits last 30d

Invoice Ninja100

Kill Bill35

Release

Cadence days

Invoice Ninja2

Kill Bill36

History

Invoice Ninja20 items

Kill Bill20 items

License

Spdx

Invoice Ninja–

Kill BillApache-2.0

Language

Primary

Invoice NinjaPHP

Kill BillJava

Market

Availability

Invoice NinjaAvailable worldwide

Kill BillAvailable worldwide · Popular in US

Capabilities

Feature-by-feature on the axes that matter for billing & invoicing software. “-” means undocumented, not absent.

Capability comparison for Billing & Invoicing Software
Capability	Invoice Ninja	Kill Bill
Core
Subscription billing	✓	✓
Usage metering	Basic	Real-time
Pricing models	Subscription, time-based, project-based invoicing	Subscriptions, usage-based, prepaid, postpaid, hybrid, and complex multi-currenc
Invoicing & AR	✓	✓
Catalog management	-	✓
Commerce
Merchant of record	-	✗
Finance
Revenue recognition	-	Native ASC 606
Tax handling	Integration	Native
Collections
Dunning	Basic retry	Basic retry
Integrations
GL / ERP sync	✓	✗
Ecosystem
API-first / developer-first	✓	✓
Deployment
Self-hostable	✓	✓
Insight
Revenue analytics	✓	✓

Core

Subscription billing

Invoice Ninja✓

Kill Bill✓

Usage metering

Invoice NinjaBasic

Kill BillReal-time

Pricing models

Invoice NinjaSubscription, time-based, project-based invoicing

Kill BillSubscriptions, usage-based, prepaid, postpaid, hybrid, and complex multi-currenc

Invoicing & AR

Invoice Ninja✓

Kill Bill✓

Catalog management

Invoice Ninja-

Kill Bill✓

Commerce

Merchant of record

Invoice Ninja-

Kill Bill✗

Finance

Revenue recognition

Invoice Ninja-

Kill BillNative ASC 606

Tax handling

Invoice NinjaIntegration

Kill BillNative

Collections

Dunning

Invoice NinjaBasic retry

Kill BillBasic retry

Integrations

GL / ERP sync

Invoice Ninja✓

Kill Bill✗

Ecosystem

API-first / developer-first

Invoice Ninja✓

Kill Bill✓

Deployment

Self-hostable

Invoice Ninja✓

Kill Bill✓

Insight

Revenue analytics

Invoice Ninja✓

Kill Bill✓

What each one is

The product in its own terms, so the numbers below have context.

Invoice Ninja

Leader

A comprehensive solution combining invoicing, payment processing, expense tracking, time management, and project coordination in a single platform, available in both cloud and self-hosted deployments.

Independently observed

Kill Bill

Kill Bill is an open-source billing and payments platform that handles complex subscription, usage-based, and prepaid billing models with multi-currency invoicing, tax compliance, and payment gateway abstraction. Deploy self-hosted or use fully managed hosting with optional enterprise accelerator capabilities.

Independently observed

Pricing

List pricing as published by each vendor, with the date we read it. Always verify at the source before you buy.

Invoice Ninja

Leader

HybridFree tier

Free forever tier available. Pro and Enterprise paid plans offered.

FreeFree

as of 2026-08-14verify ↗

Kill Bill

from $40/moHybridFree tier

Free open-source tier. Aviate software tiers (Foundation, Growth, Flock, Finance) priced separately as annual flat fees. Support plans as additional annual flat fees (Launch, Growth, Enterprise).

Open Source (Self-Hosted)Free
- Full source code access
- Docker deployment
- Community support
- Full infrastructure control
AWS Marketplace$40/mo
- AWS account deployment
- Faster evaluation path
Aviate - FoundationContact sales
- Core admin and billing configuration
- Pre-configured test environment
- Operational views
Aviate - GrowthContact sales
- Everything in Foundation
- Dynamic catalog and pricing rules
- Usage metering
- Programmatic control
Aviate - FlockContact sales
- Everything in Growth
- Quote, order, contract workflows
- Operational BI dashboards
- Commercial diagnostics
Aviate - FinanceContact sales
- Everything in Flock
- Revenue recognition
- Accounting periods
- Multi-entity governance

as of 2026-08-14verify ↗

Platform & deployment

Where each product runs and how it can be hosted. A dash means undocumented, not unsupported.

Platform and deployment support comparison
Supports	Invoice Ninja	Kill Bill
WebPlatforms	✓	✓
iOSPlatforms	✓	✗
AndroidPlatforms	✓	✗
macOSPlatforms	✓	✗
WindowsPlatforms	✓	✗
LinuxPlatforms	✓	✗
CLIPlatforms	✗	✓
Cloud / SaaSDeployment	✓	✓
Self-hostedDeployment	✓	✓
On-premiseDeployment	✗	✓
HybridDeployment	✗	✓

Platforms

Web

Invoice Ninja✓

Kill Bill✓

iOS

Invoice Ninja✓

Kill Bill✗

Android

Invoice Ninja✓

Kill Bill✗

macOS

Invoice Ninja✓

Kill Bill✗

Windows

Invoice Ninja✓

Kill Bill✗

Linux

Invoice Ninja✓

Kill Bill✗

CLI

Invoice Ninja✗

Kill Bill✓

Deployment

Cloud / SaaS

Invoice Ninja✓

Kill Bill✓

Self-hosted

Invoice Ninja✓

Kill Bill✓

On-premise

Invoice Ninja✗

Kill Bill✓

Hybrid

Invoice Ninja✗

Kill Bill✓

Integrations

What each product connects to. Counts come from the vendor's own integration directory where one exists.

In common (3)

Stripe
PayPal
GoCardless

Invoice Ninja

Leader

15 total - 12 not shared

Square
Gmail
QuickBooks
Slack
MailChimp
Zapier
Make
Pabbly
Checkout.com
Helcim
PayFast
Nordigen

Independently observed

Kill Bill

9 total - 6 not shared

Adyen
Braintree
Avalara
Vertex
LDAP
Active Directory

Independently observed

Comparison generated from independently-sourced facts. Every value links to its source and retrieval date. See the method.