Comparison

Invoice Ninja vs Kill Bill

On the evidence we track, Invoice Ninja leads this comparison with a composite score of 61/100. 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 Ninja61

Kill Bill43

Attribute comparison across 2 tools
Attribute	Invoice NinjaLeader	Kill Bill
vioscaleAI score	61 / 100high · 75%	43 / 100high · 77%
Pricing
Free tierpricing.free_tier	✓	✓
Modelpricing.model	freemium	freemium
Price levelpricing.price_level	low	high
Starting pricepricing.starting_price	-	$9,999
Transparentpricing.transparent	✗	✓
Integrations
Countintegrations.count	1,000	10
Security
Gdprsecurity.gdpr	✓	✓
Pcisecurity.pci	✓	✓
Scorecardsecurity.scorecard	4	4.4
Soc2security.soc2	✓	-
Trust centersecurity.trust_center	-	https://killbill.io/platform/tax-compliance.html
Vulnerabilitiessecurity.vulnerabilities	Count: 1 · Source: https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=packagist&package_name=hillelcoren%2Finvoice-ninja&per_page=100 · Last 12m: 0 · Max severity: MODERATE	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	10,268	5,793
Activity
Commits last 30dactivity.commits_last_30d	100	27
Release
Cadence daysrelease.cadence_days	1	47
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
Content
Faqcontent.faq	6 items	8 items

Score

vioscaleAI score

Invoice Ninja61 / 100high · 75%

Kill Bill43 / 100high · 77%

Pricing

Free tier

Invoice Ninja✓

Kill Bill✓

Model

Invoice Ninjafreemium

Kill Billfreemium

Price level

Invoice Ninjalow

Kill Billhigh

Starting price

Invoice Ninja–

Kill Bill$9,999

Transparent

Invoice Ninja✗

Kill Bill✓

Integrations

Count

Invoice Ninja1,000

Kill Bill10

Security

Gdpr

Invoice Ninja✓

Kill Bill✓

Pci

Invoice Ninja✓

Kill Bill✓

Scorecard

Invoice Ninja4

Kill Bill4.4

Soc2

Invoice Ninja✓

Kill Bill–

Trust center

Invoice Ninja–

Kill Billhttps://killbill.io/platform/tax-compliance.html

Vulnerabilities

Invoice NinjaCount: 1 · Source: https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=packagist&package_name=hillelcoren%2Finvoice-ninja&per_page=100 · Last 12m: 0 · Max severity: MODERATE

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 Ninja10,268

Kill Bill5,793

Activity

Commits last 30d

Invoice Ninja100

Kill Bill27

Release

Cadence days

Invoice Ninja1

Kill Bill47

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

Content

Faq

Invoice Ninja6 items

Kill Bill8 items

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

Provides invoicing, payment collection, expense tracking, and time tracking capabilities integrated into a single application. Available as a cloud-hosted service or self-hosted installation with full control over infrastructure.

Independently observed

Kill Bill

Open-source subscription and usage billing system that runs on your infrastructure, supporting recurring charges, tiered pricing, and usage-based models with detailed invoicing and audit trails.

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

SubscriptionFree tier

Free forever. Pro pricing not shown. Enterprise pricing varies by users (1-100).

FreeFree
- 5 clients
- Unlimited invoicing
- 4 invoice templates
- Payment processing (Stripe, PayPal, Square, GoCardless)
- Recurring invoices and auto-billing
- +12 more
Pro-
- 11 invoice templates
- All Free plan features
EnterpriseContact sales
- 11 invoice templates
- Custom features and configuration

as of 2026-09-10verify ↗

Kill Bill

from $9999/moHybridFree tier

Free open source or $9,999/month Aviate enterprise

Kill Bill (Open Source)Free
- Subscription and usage billing
- Catalog and invoicing
- Multi-tenancy
- Plugin framework
- REST API
- +2 more
Aviate$9,999/month billed annually, never tied to revenue
- Catalog UI and plan APIs
- Coupons
- Cloud hosting with auto-scaling
- Aviate Metering for usage events
- Aviate Wallet for prepaid credits
- +4 more

as of 2026-10-13verify ↗

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	✓	✓
AndroidPlatforms	✓	✗
macOSPlatforms	✓	✗
WindowsPlatforms	✓	✗
LinuxPlatforms	✓	✗
Cloud / SaaSDeployment	✓	✓
Self-hostedDeployment	✓	✓
On-premiseDeployment	✗	✓
HybridDeployment	✓	✓

Platforms

Web

Invoice Ninja✓

Kill Bill✓

Android

Invoice Ninja✓

Kill Bill✗

macOS

Invoice Ninja✓

Kill Bill✗

Windows

Invoice Ninja✓

Kill Bill✗

Linux

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 (4)

Stripe
PayPal
GoCardless
QuickBooks

Invoice Ninja

Leader

15 total - 11 not shared

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

Independently observed

Kill Bill

20 total - 16 not shared

Adyen
Braintree
Avalara
Vertex
LDAP
Active Directory
Email Notifications
Tax Calculation
Analytics
Salesforce
HubSpot
NetSuite
SAP
Hyperswitch
Avalara AvaTax
Kintsugi

Independently observed

Still deciding?

Invoice Ninja or Kill Bill: which one depends on you

A composite score cannot know your constraints. Describe them and both get re-weighted against what you actually need, with the evidence behind every position.

Free to run, no account needed to start. How the evaluation works

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