Invoice Ninja
Free open-source invoicing, expenses, and time-tracking for freelancers and small businesses
About Invoice Ninja
Invoice Ninja is a powerful open-source invoicing platform that helps freelancers and small businesses create professional invoices, accept online payments, track expenses, and manage projects. Available as both a hosted SaaS and a self-hosted solution, it offers over 100 payment gateway integrations, multi-currency support, and customizable invoice templates — all with a generous free tier.
Pros & Cons
Pros
- Open-source with a self-hosted option gives full control over data and privacy
- Generous free tier with unlimited invoices for up to 5 clients
- Supports 100+ payment gateways including Stripe, PayPal, and Square
- Multi-currency support for 100+ currencies with automatic exchange rates
- Highly affordable compared to competitors like FreshBooks or QuickBooks
- Built-in time tracking, expense management, and project tools in one platform
Cons
- Free and Pro plans limit the number of clients (5 and 20 respectively)
- Only Enterprise plan supports multiple users — single-user only on lower tiers
- Interface can feel overwhelming due to the wide range of features
- Some users report occasional bugs with PDF generation and image rendering
- Customer support response times can be slow on lower-tier plans
Key Features
Professional Invoicing
Create and send customizable invoices with multiple templates, auto-billing, recurring invoices, and partial payment support.
Online Payments
Accept payments via 100+ gateways including Stripe, PayPal, Square, and ACH with automatic payment reconciliation.
Expense Tracking
Track and categorize business expenses, attach receipts, and re-invoice expenses to clients with one click.
Time Tracking & Projects
Log billable hours with built-in timers, organize work into projects, and convert tracked time directly into invoices.
Quotes & Proposals
Create professional quotes that clients can approve online, which automatically convert into invoices upon acceptance.
Client Portal
Branded self-service portal where clients can view invoices, make payments, approve quotes, and download documents.
Multi-Currency Support
Invoice in 100+ currencies with automatic exchange rate updates, ideal for businesses with international clients.
Purchase Orders & Vendors
Manage vendors, create purchase orders, and track supplier payments alongside client invoicing.
Bank Transaction Import
Automatically import bank, credit card, and PayPal transactions for easy reconciliation and expense categorization.
Self-Hosted Option
Deploy on your own server for full data ownership and privacy, with the same feature set as the hosted version.
Pricing
- Up to 5 clients
- Unlimited invoices
- 4 invoice templates
- Online payments
- Expense tracking
- Time tracking
- Up to 20 clients
- 11 invoice templates
- Custom client portal URL
- Auto-billing & reminders
- Remove Invoice Ninja branding
- Email support
- Unlimited clients
- Multiple users & permissions
- All invoice templates
- Document locking until payment
- Priority support
- Everything in Pro
Best For
Freelancer Invoicing
Solo freelancers can create professional invoices, track time spent on projects, and accept online payments without paying for expensive accounting software.
Small Business Billing
Small businesses can manage recurring invoices, track expenses, handle purchase orders, and give clients a branded self-service payment portal.
Agency Time & Project Billing
Agencies can track billable hours across multiple projects, assign work to team members, and convert logged time into detailed client invoices.
Self-Hosted Financial Management
Privacy-conscious businesses can deploy Invoice Ninja on their own servers to maintain full ownership of sensitive client and financial data.
International Business Invoicing
Companies with global clients can invoice in 100+ currencies with automatic exchange rate updates and multi-language document support.
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Featured In
7 Best Subscription Billing & Revenue Tools for SaaS Companies (2026)
Best for bootstrapped micro-SaaS and solo founders who need affordable recurring invoicing — not a full billing platform, but good enough until you outgrow it.
7 Best Open-Source Invoicing & Finance Tools for Freelancers (2026)
Best all-around open-source invoicing tool — the only free option with 100+ payment gateways, time tracking, and a client portal, making it the closest open-source equivalent to FreshBooks or QuickBooks.
Best Invoicing Tools That Actually Get Freelancers Paid on Time (2026)
Best overall for freelancer invoicing — Invoice Ninja's 100+ payment gateways, automated reminders, and auto-billing deliver the most comprehensive toolkit for getting paid on time, with a generous free tier.
6 Best Tool Combos for Agency Billing and Time Tracking (2026)
Best budget invoicing tool for agencies — pair Invoice Ninja's free invoicing with your preferred time tracker for a capable billing setup at minimal cost.
Invoicing Tools With the Best Multi-Currency Support (2026)
Best open-source option for businesses that need unlimited multi-currency invoicing with self-hosting capability and zero recurring costs.
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