Comparison

FastSpring vs Invoice Ninja

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.

FastSpring full profile →Invoice Ninja full profile →

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FastSpring41

★Invoice Ninja61

Attribute comparison across 2 tools
Attribute	FastSpring	Invoice NinjaLeader
vioscaleAI score	41 / 100low · 46%	61 / 100high · 75%
Pricing
Free tierpricing.free_tier	-	✓
Modelpricing.model	commercial	freemium
Price levelpricing.price_level	-	low
Transparentpricing.transparent	-	✗
Integrations
Countintegrations.count	20	1,000
Security
Gdprsecurity.gdpr	✓	✓
Pcisecurity.pci	✓	✓
Scorecardsecurity.scorecard	-	4
Soc2security.soc2	-	✓
Trust centersecurity.trust_center	https://fastspring.com/blog/hidden-challenges-proper-pci-compliance/	-
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
Reliability
Status pagereliability.status_page	✓	✓
Adoption
Dependent reposadoption.dependent_repos	-	0
Github starsadoption.github_stars	-	10,268
Activity
Commits last 30dactivity.commits_last_30d	-	100
Release
Cadence daysrelease.cadence_days	-	1
Historyrelease.history	-	20 items
Language
Primarylanguage.primary	-	PHP
Market
Availabilitymarket.availability	Available worldwide	Available worldwide
Content
Faqcontent.faq	5 items	6 items

Score

vioscaleAI score

FastSpring41 / 100low · 46%

Invoice Ninja61 / 100high · 75%

Pricing

Free tier

FastSpring–

Invoice Ninja✓

Model

FastSpringcommercial

Invoice Ninjafreemium

Price level

FastSpring–

Invoice Ninjalow

Transparent

FastSpring–

Invoice Ninja✗

Integrations

Count

FastSpring20

Invoice Ninja1,000

Security

Gdpr

FastSpring✓

Invoice Ninja✓

Pci

FastSpring✓

Invoice Ninja✓

Scorecard

FastSpring–

Invoice Ninja4

Soc2

FastSpring–

Invoice Ninja✓

Trust center

FastSpringhttps://fastspring.com/blog/hidden-challenges-proper-pci-compliance/

Invoice Ninja–

Vulnerabilities

FastSpring–

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

Reliability

Status page

FastSpring✓

Invoice Ninja✓

Adoption

Dependent repos

FastSpring–

Invoice Ninja0

Github stars

FastSpring–

Invoice Ninja10,268

Activity

Commits last 30d

FastSpring–

Invoice Ninja100

Release

Cadence days

FastSpring–

Invoice Ninja1

History

FastSpring–

Invoice Ninja20 items

Language

Primary

FastSpring–

Invoice NinjaPHP

Market

Availability

FastSpringAvailable worldwide

Invoice NinjaAvailable worldwide

Content

Faq

FastSpring5 items

Invoice Ninja6 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	FastSpring	Invoice Ninja
Core
Subscription billing	✓	✓
Usage metering	None	Basic
Pricing models	Subscription, one-time purchases, recurring payments	Subscription, time-based, project-based invoicing
Invoicing & AR	✓	✓
Catalog management	✓	✓
Commerce
Merchant of record	✓	-
Finance
Revenue recognition	None	-
Tax handling	Native	Integration
Collections
Dunning	None	Basic retry
Integrations
GL / ERP sync	-	✓
Ecosystem
API-first / developer-first	✓	✓
Deployment
Self-hostable	✗	✓
Insight
Revenue analytics	✓	✓

Core

Subscription billing

FastSpring✓

Invoice Ninja✓

Usage metering

FastSpringNone

Invoice NinjaBasic

Pricing models

FastSpringSubscription, one-time purchases, recurring payments

Invoice NinjaSubscription, time-based, project-based invoicing

Invoicing & AR

FastSpring✓

Invoice Ninja✓

Catalog management

FastSpring✓

Invoice Ninja✓

Commerce

Merchant of record

FastSpring✓

Invoice Ninja-

Finance

Revenue recognition

FastSpringNone

Invoice Ninja-

Tax handling

FastSpringNative

Invoice NinjaIntegration

Collections

Dunning

FastSpringNone

Invoice NinjaBasic retry

Integrations

GL / ERP sync

FastSpring-

Invoice Ninja✓

Ecosystem

API-first / developer-first

FastSpring✓

Invoice Ninja✓

Deployment

Self-hostable

FastSpring✗

Invoice Ninja✓

Insight

Revenue analytics

FastSpring✓

Invoice Ninja✓

What each one is

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

FastSpring

A commerce platform that enables businesses to process payments, manage subscriptions, handle taxes across multiple countries, and integrate with their sales and CRM systems through APIs and webhooks.

Independently observed

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

Pricing

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

FastSpring

Pricing not documented yet.

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 ↗

Platform & deployment

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

Platform and deployment support comparison
Supports	FastSpring	Invoice Ninja
WebPlatforms	✓	✓
AndroidPlatforms	✗	✓
macOSPlatforms	✗	✓
WindowsPlatforms	✗	✓
LinuxPlatforms	✗	✓
Cloud / SaaSDeployment	✓	✓
Self-hostedDeployment	✗	✓
HybridDeployment	✗	✓

Platforms

Web

FastSpring✓

Invoice Ninja✓

Android

FastSpring✗

Invoice Ninja✓

macOS

FastSpring✗

Invoice Ninja✓

Windows

FastSpring✗

Invoice Ninja✓

Linux

FastSpring✗

Invoice Ninja✓

Deployment

Cloud / SaaS

FastSpring✓

Invoice Ninja✓

Self-hosted

FastSpring✗

Invoice Ninja✓

Hybrid

FastSpring✗

Invoice Ninja✓

Integrations

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

In common (2)

Mailchimp
Zapier

FastSpring

4 total - 2 not shared

HubSpot
WordPress

Independently observed

Invoice Ninja

Leader

15 total - 13 not shared

Stripe
PayPal
Square
GoCardless
Gmail
QuickBooks
Slack
Make
Pabbly
Checkout.com
Helcim
PayFast
Nordigen

Independently observed

Still deciding?

FastSpring or Invoice Ninja: 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.