Apps similar to Sleek Bill include GnuCash, which is free and open source. Other options are Summit Finance, Midday, Dolibarr and Invoice Ninja. There's no shortage of Invoicing Software like Sleek Bill, with more than 100 alternatives for the web, iPhone, Windows, Mac and Android.
Snaply is an invoicing platform for EU freelancers and small businesses with full Factur-X / ZUGFeRD (EN 16931) compliance built in from day one. As mandatory e-invoicing rolls out across the EU, Snaply keeps you compliant automatically — no extra setup, no add-ons required.
Czechia
EU
Manage your business from your smartphone, tablet and computer. Create professional invoices, quotes, track your inventory and costs, all backed up to the cloud and synced automatically between your devices.
United States
Invoicer is a free, native Mac app designed for freelancers who need a fast, offline-friendly way to create and manage professional invoices. It focuses on a clean macOS experience, making it easy to stay organized across clients, services, and business profiles.
Abak is the most flexible time and billing system in the industry. Support multiple currencies, multiple invoice formats, and dozens of rates. Abak connects your employee’s time and expenses to your invoices, your payroll and your accounting systems, automatically.
FranceEU
Invoice Simple is the perfect invoice maker for small business owners, contractors and freelancers needing a simple and professional mobile invoice app. Create, send and track invoices and estimates easily on your phone.
United States
Free e-invoice management software. PEPPOL and PDF formats. Cloud-based. Keeps your workflow under control. Integrates easily with your ERP. No license fee or hidden costs. Upgrades available for automated validation and additional e-invoice formats.
The Nexonia Expenses application streamlines your employee expense reporting process so you can better manage business & travel expenses for administrators & staff.
An online fundraising platform for schools, non-profits and businesses looking to give away NFTs and enable NFT gated experiences.
United States
OpenSourceBilling is a simple web application to create and send invoices, receive payments, manage clients and companies. It generates reports of Item sales, payments, and collected revenues. It supports multi languages and multi currencies.
United States
InvoiceWright is an invoicing app for solo tradespeople and freelancers who bill from the job
Pakistan
