What are the best billing and invoicing software?

The best billing and invoicing software depends on your business size, budget, and whether you need simple invoicing or full accounting and payment processing. For most small businesses and freelancers, leading options include **QuickBooks Online**, **Square Invoices**, **Wave**, **Zoho Invoice**, **Invoice Ninja**, and **invoicely**.[2][3][4][6][5][7][8]

Below is a concise comparison to help you choose.

### 1. QuickBooks Online (with invoicing)

- **Best for:** Small–medium businesses that want invoicing plus full accounting.

- **Key features:**

- Create, send, and track invoices, record payments, and monitor outstanding balances in one place.[2]

- Integrates directly with expense tracking, reports, and tax features.[2]

- **Pros:**

- All‑in‑one accounting and invoicing, widely used by accountants.

- Strong reporting and cash‑flow tools.[2]

- **Cons:**

- Monthly subscription; overkill if you just need simple invoices.

### 2. Square Invoices

- **Best for:** Service businesses that already take card payments or want easy payment processing.

- **Key features:**

- Send invoices and estimates and accept payments via card, ACH, and other methods.[3]

- Includes contracts and basic customer management in an all‑in‑one solution powered by Square.[3]

- **Pros:**

- Very easy to start; strong payment tools.

- Good for on‑site, mobile, and remote billing.

- **Cons:**

- Processing fees on payments; accounting features are limited vs. full accounting systems.

### 3. Wave Invoicing

- **Best for:** Freelancers and very small businesses wanting free invoicing and basic accounting.

- **Key features:**

- Invoicing software for small businesses and freelancers that helps save time and manage customer information.[4]

- Syncs with Wave’s free accounting tools.[4]

- **Pros:**

- Core invoicing and accounting are free.[4]

- Simple interface, good for non‑accountants.

- **Cons:**

- You pay for payments and certain add‑ons; fewer advanced features than paid platforms.

### 4. Zoho Invoice

- **Best for:** Small businesses that want customizable invoices and automation at low cost.

- **Key features:**

- Create invoices and quotes, email them, and get paid quickly with free invoicing software.[6]

- Part of the broader Zoho ecosystem (CRM, projects, etc.).[6]

- **Pros:**

- Free, with strong customization and automation for invoices.[6]

- Integrates nicely if you use other Zoho apps.

- **Cons:**

- Not a full accounting system by itself; better when paired with Zoho Books.

### 5. Invoice Ninja

- **Best for:** Freelancers and agencies needing project/time‑based billing and open‑source options.

- **Key features:**

- Free invoicing software where you can easily send invoices without specialist accounting knowledge.[5]

- Supports recurring invoices, time tracking, and quotes.[5]

- **Pros:**

- Generous free plan; strong for recurring services and project billing.

- Open‑source option if you want to self‑host.[5]

- **Cons:**

- Interface and setup can be more technical than “simple” tools.

- Accounting features are lighter than full bookkeeping systems.

### 6. invoicely

- **Best for:** Simple, low‑cost online invoicing with time and expense tracking.

- **Key features:**

- Free online invoicing for small businesses, with invoices, estimates, time and expense tracking, and online payments.[7]

- **Pros:**

- Easy to set up and use; good for basic service businesses.[7]

- **Cons:**

- Focused on invoicing; limited broader accounting and reporting.

### 7. Other notable options from expert roundups

Independent rankings of top invoicing/billing tools for small businesses also highlight: **Odoo, Oracle NetSuite, PayPal Invoicing, QuickBooks Enterprise, and specialized legal/industry tools**.[8] These are generally better for:

- Larger or more complex businesses (e.g., NetSuite, Odoo).[8]

- Companies already built around a particular payment system (e.g., PayPal Invoicing).[8]

- Firms needing industry‑specific features (legal, property management, etc.).[8]

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If you tell me:

- whether you’re a freelancer, small business, or larger company,

- your approximate monthly invoice volume,

- whether you need full accounting or just invoicing,

I can narrow this down to 1–2 best choices and suggest the most suitable pricing tier.