Curated list of the best free invoicing tools that let you bill an unlimited number of clients without hidden fees.
Get targeted exposure with custom position pinning and highlighted placement.
Full‑featured accounting suite with free invoicing, unlimited clients, and automatic receipt scanning.
Open‑source invoicing platform offering unlimited invoices, clients, and projects on its free tier.
Simple online invoicing with unlimited clients and invoices; includes basic reporting and multi‑currency support.
Free cloud invoicing with unlimited customers, automated tax calculations, and a built‑in receipt scanner.
Create and send unlimited invoices through PayPal; only transaction fees apply when payments are received.
Free invoicing tool that lets you bill unlimited clients; you only pay processing fees on paid invoices.
Free accounting & invoicing software with unlimited clients, basic reporting, and simple time‑tracking.
UK‑based free invoicing solution with unlimited customers, recurring invoices, and simple expense tracking.
Open‑source self‑hosted invoicing system; unlimited clients, quotes, and invoices with full customization.
Lightweight open‑source invoicing app that supports unlimited clients and invoices; ideal for small businesses.
Free desktop invoicing software for Windows, macOS, and Linux; unlimited customers and multi‑currency support.
Zoho’s free tier now allows unlimited clients but caps some advanced features; great for basic invoicing.
Web‑based tool that creates PDF invoices instantly; no account needed and supports unlimited clients.
Time‑tracking + invoicing combo; free tier permits unlimited clients and up to 1 user with basic invoicing.
UK‑focused free invoicing with unlimited customers, automatic VAT calculations, and email delivery.