Kill Bill is an open-source, programmable billing platform with APIs for pricing models, subscriptions, invoices, and payment gateway integrations.
Best Billing and Invoicing Software in 2026
Billing and invoicing software helps you create invoices, manage recurring charges, track expenses, process payments and handle tax calculations. Tools in this category can run on the web or through API, iOS, Android, macOS and Windows apps. Compare the features that match your work, such as monthly invoice limits, included team seats and payment processing. If you work from a Xiaomi, Redmi or POCO phone, check…
Wave is invoicing software for businesses to create and send invoices, collect payments, and manage customer information.
Billdu is paid invoicing software for the web, iOS, and Android.
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FreshBooks
FreshBooks is accounting software for freelancers, solopreneurs, and small businesses.
AndroidiOSWebAPI8.0From $4.60 a month - 5

Hiveage
Hiveage is online invoicing and billing software for small businesses and freelancers.
Free planAndroidiOSWebAPI7.8From $19 a month - 6

Recurly
Recurly is web-based subscription billing software from Recurly, a company founded in 2009 and headquartered in San Francisco.
AndroidiOSWebAPI7.8From $249 a month - 7
Zoho Billing
Zoho Billing is a paid service for creating recurring invoices, collecting online payments, and managing customer billing.
AndroidiOSWebAPI7.8From $39 a month - 8
FastSpring
FastSpring is a merchant of record for companies selling digital products, including SaaS and software.
Free planAndroidiOSWebAPI7.6Free plan - 9

Lemon Squeezy
Lemon Squeezy is an all-in-one sales platform for SaaS companies, software makers, and digital creators offering downloads, subscriptions, and software licenses.
WebAPI7.6$550 one-time - 10

Billsby
Billsby manages subscriptions, recurring billing, invoicing, and customer lifecycle tasks.
Free planWebAPI7.5From $45 a month - 11

Lago
Lago is an open-source billing platform that links product usage and commercial terms to customer invoices.
Free planOpen sourceWebAPISelf-hosted7.5Free plan - 12

Younium
Younium is a subscription management platform for B2B SaaS and technology companies.
AndroidiOSWebAPI7.4From 500 SEK a month - 13

Zoho Invoice
Zoho Invoice is invoicing software with a free plan for small businesses, consultants, agencies, contractors, freelancers, entrepreneurs, and startups.
Free planAndroidiOSmacOSWindows7.2Free plan - 14
Square Online
Free planWeb7.1From $49 a month - 15
Invoice Simple
Invoice Simple provides tools for small businesses to create and send invoices, estimates, and receipts on Android, iOS, and the web.
AndroidiOSWeb7.0From $69.99 a year - 16

Orb
Orb is a web and API platform for usage-based billing, hybrid pricing, and revenue workflows.
WebAPI6.8 - 17
Simplybill
Simplybill is a cloud-based invoicing service for creating, sending, and tracking invoices in a browser.
Free planWeb6.8From $5 a month - 18

ChargeOver
WebAPI6.7From $229 a month - 19

Invoicera
Invoicera is invoicing and billing software with recurring invoices, online payments, payment reminders, multi-currency invoicing, and a client portal.
AndroidiOSWebmacOS6.7From $50 a month - 20
Invoice2go
Invoice2go helps freelancers and small businesses prepare estimates, send invoices, collect payments, and manage expenses.
AndroidiOSWeb6.6 - 21
Maxio
Maxio combines billing and financial reporting in a quote-to-cash platform for B2B SaaS and AI companies.
WebAPI6.5From $599 a month - 22

BillingPlatform Accounts Receivable
BillingPlatform Accounts Receivable automates payment collection, credits, refunds, and management of overdue accounts.
WebAPI6.4 - 23
6.2 - 24
6.0 - 25
Subscript
Subscript combines B2B SaaS billing, revenue recognition, and reporting for finance leaders and teams.
WebAPI5.8From $150,000 a year
Choosing well
Check Android access
Web access can work across devices, while an Android app may make invoicing and expense work easier from a Xiaomi, Redmi or POCO phone. Confirm the supported platform before signing up.
Check whether the mobile app includes the actions you need, rather than assuming the web and mobile versions have the same tools.
Compare plan terms
A free plan can help you start without a subscription. Other products use paid plans, pricing on request or a free trial, so compare the starting price and trial terms before choosing.
Look for recurring billing support if you charge customers on a schedule.
Match billing features
Payment processing, tax calculation and expense tracking can reduce separate steps in your workflow. Check which of these are included in the plan you would use.
Monthly invoice limits matter if your invoice volume changes. Review the limit alongside the paid plan details.
Plan for people and flexibility
Compare included team seats when more than one person needs access. Extra seats or different limits may affect the plan that fits your team.
Open-source code is offered by products in this category. If you need to read or change the code, check the licence and the project documentation.
Questions people ask
Can I use billing software on an Android phone?
Android is one of the platforms represented in this category. Check the individual product page for an Android app and confirm which billing, payment or expense tasks it supports.
Are free plans available?
A free plan is offered by products in this category. Compare its invoice limits, team seats and included features with paid plans before deciding.
Can these tools handle recurring billing?
Recurring billing is one of the comparison points for this category. Check the product details to confirm how scheduled charges work and which plan includes them.
Do billing tools calculate tax?
Tax calculation is a comparison point for these products. Review the individual feature details to see whether the calculation tools fit your requirements.
Can I try software before paying?
A free trial is offered by products in this category. Trial length and included features vary, so check the terms for the product you are considering.

