Invoice Ninja

Overview

Invoice Ninja is a billing platform that brings invoicing together with expenses, projects, and time tracking. It is best suited to freelancers and small businesses that want client billing tied to tracked work, rather than invoicing alone. The choice is between a hosted service and self-hosted software, with very different responsibilities for data and maintenance.

Key features

Quotes, invoices, and payments

Users can prepare quotes and invoices, manage products, and preview PDF invoices. Clients can e-sign quotes, which can then be converted into invoices. Recurring invoices, estimates, and payment requests support more than one-off billing, while online payments through Stripe, PayPal, Square, GoCardless, Authorize.net, and Mollie give clients several ways to pay.

The hosted Free plan includes online payments and unlimited invoicing, making it a practical way to start billing without a subscription. Its five-client ceiling is the catch: it suits a small, stable client list better than a growing practice. Pro and Enterprise remove that client cap.

Projects, time, and expenses

Billable time tracking, task management, and Kanban project boards connect work to billing: tracked time can be converted into invoices. Vendor and expense management round out the workflow. This combination is useful for service businesses that need to account for project work, but less compelling for someone seeking only a lightweight way to issue invoices.

Integrations and security

Integrations include Zapier, Make, Pabbly, n8n, Integrately, REST API access, and webhooks. Pro adds API access, which makes it the more relevant tier for businesses that need to connect billing to other software.

The hosted service says it encrypts data in transit with TLS 1.2+ and at rest with AES-256, and offers MFA. It has completed a SOC 2 examination and identifies PCI-DSS and GDPR compliance; its SOC 2 report is available to customers and prospective customers under NDA. Self-hosting keeps invoice, client, and financial data on your own server, but also makes you responsible for securing that environment. The self-hosted code uses Elastic License v2: business use and modification are permitted, while commercial resale or offering it as a managed service to others requires a separate agreement.

Pricing

Invoice Ninja is freemium, with no free trial. The hosted Free plan costs nothing, billed Forever free. It includes five clients, unlimited invoicing, 11 professional invoice templates, online payments, projects, time tracking, vendors, and expenses. That is a substantial starting toolkit, but the client cap is a meaningful constraint once a business grows.

Self-hosted costs nothing to download and self-host; server hosting is separately paid. It has no stated client limits, invoice caps, or feature paywalls, so it may suit technically capable users prioritizing control and avoiding product subscription charges. The tradeoff is responsibility for server security and hosting costs.

Ninja Pro costs $14 a month, billed monthly, or $140 billed annually. It adds unlimited clients and invoices, API access, custom invoice designs, automatic reminders, reports, and 10 interlinked companies. It is the natural step up for a growing solo business or small firm that needs more clients and reporting; annual billing lowers the stated total compared with twelve monthly payments.

Enterprise costs $18 a month, billed monthly, and scales by account users. It supports up to 100 account users and adds user permissions, bank sync, e-Invoicing and PEPPOL, 250 PEPPOL credits, and document uploads. Teams needing role controls or those invoicing through PEPPOL are its clearest fit; the user-based scaling matters when budgeting.

Premium Business starts at $280 a year, with custom pricing beyond that starting point. It includes Pro and Enterprise features plus a developer concierge, direct priority support, invoice design service, data migration assistance, and custom reports. Those services make it a better fit for businesses that need implementation or ongoing help than for a solo user who can work with documentation and community forums. The maker lists forums and documentation for all plans, and priority direct support for paid plans.

Platforms

Invoice Ninja offers web, Windows, macOS, Linux, iOS, and Android apps, with data syncing across devices. It also supports API access and a self-hosted deployment option. The broad app coverage is useful for businesses working across desktop and mobile, though self-hosting adds operational work that hosted users avoid.

Who it's for

Choose Invoice Ninja if you bill for project work and want time tracking, expenses, and client payments alongside quotes and invoices. The hosted Free plan is most appropriate for a business with no more than five clients; Pro or Enterprise makes more sense when client count, integrations, or team controls become central. Choose self-hosting only if you are prepared to manage the server and its security. If you only need basic invoicing, the project and expense suite may be more than you need.

Pros and cons

• Pros: Unlimited invoicing and online payments on the hosted Free plan give a small client list a capable starting point.
• Pros: Billable time can flow into invoices, while projects, tasks, and expenses keep related work in the same system.
• Pros: Hosted and self-hosted options let users choose between managed service and keeping financial data on their own server.
• Cons: The Free plan's five-client limit can force an upgrade even when invoice volume remains manageable.
• Cons: Self-hosting is not a hands-off way to save on subscriptions: hosting costs extra and server security is the user's responsibility.
• Cons: Enterprise pricing scales by users, so teams should account for account size when comparing its $18 a month starting rate.

Alternatives

For a broader comparison focused on contractors, see Contractor Invoicing Software.

• Zoho Invoice is worth considering if its free plan for all Indian businesses fits: it allows up to two users, three projects, and 500 invoices per year.
• Contractor+ may suit someone who wants basic CRM and a mobile-first option, with a free tier capped at five estimates or invoices per month and 250 leads and clients.
• Bookipi is a leaner free option for very low volume, capped at three invoices per month and three eSignatures.
• Invoice Plus may fit users who value offline mobile use, though its free Basic plan is capped at 10 invoices per month.
• Invoicely is another free option, but its free plan allows five monthly invoices and three saved clients.
• InvoiceGo is an iOS-only alternative.
• Invoice Home is an alternative to consider for its free plan, which limits invoices to $1,000 for the past 30 days.
• FreshBooks is a paid alternative with a free trial and plans starting at $23 a month.

Verdict

Invoice Ninja is a strong fit for freelancers and small businesses that want billing connected to project work, expenses, and tracked time, with the choice to host it themselves. Its broad free toolkit makes it appealing at small scale, but the five-client cap is a real dividing line. Look elsewhere if you need a simpler invoicing tool, or choose a paid tier when client growth, team permissions, or support needs justify the cost.