The Finance Base / Subscription billing software / FOSSBilling
fossbilling.org
FOSSBilling
FOSSBilling is a self-hosted platform for billing and client administration in hosting and online-service businesses. It creates invoices, sends reminders, supports recurring and one-time pricing, handles several currencies and promotions, and connects hosting with registrar workflows. Users reach…
Visit fossbilling.org ↗ What it costs
- 7.9 No. 7on Subscription billing software
- Free planprice, as published
- Oct 21, 2026read on
What FOSSBilling costs
- FOSSBilling Free
- FOSSBilling core Free
The FOSSBilling and core offerings are free, open source and self-hosted. No paid plan or free trial is listed.
As docs.fossbilling.org publishes them, read Oct 9, 2026. Fees, tax and exchange rates can differ when you pay; check the provider's own page first.
Its statement
- Free plan
- Yes
- Free trial
- No
- Runs on
- iPhone Android Web Linux
- Facts on record
- 51
Strengths and limits
Strengths
- Free, open-source core that you host yourself
- Invoices, reminders and recurring or one-time charges
- Multiple currencies and automatic exchange-rate synchronization
- Hosting and domain workflows with extensions
- REST API serving admin, client and guest endpoints
Limits
- Self-hosting leaves infrastructure and backups to the operator
- No mobile app is listed
- No multi-factor authentication yet
- Control-panel imports and single sign-on are unavailable
- Domain prices are entered manually; live prices are not pulled
What FOSSBilling does
FOSSBilling provides billing and client administration for hosting providers and digital-service businesses. It generates invoices, sends payment reminders, and supports recurring or one-time charges, multiple currencies, exchange-rate synchronization and promo codes.
Through supported control panels, hosting products can automatically create and manage accounts. Registrar integrations let domain products process registrations, renewals, transfers and WHOIS availability checks.
Fees and plans
FOSSBilling and its core software are free, open source and self-hosted. Usage-based billing is marked as planned rather than available.
There is no free trial because the published model is a free plan rather than a trial. Domain prices are entered manually for each top-level domain; live registrar pricing is not retrieved.
Where it runs
FOSSBilling operates as self-hosted Linux software through a browser and REST API. The documented setup calls for PHP 8.3, 8.4 or 8.5, a MySQL-compatible database, and Apache, LiteSpeed/OpenLiteSpeed or NGINX.
The published platforms do not list an iPhone, Android or desktop app. Its JSON API groups endpoints for administrators, clients and guests. API authentication uses HTTP Basic Authentication with a username and API key.
Protection, as published
Published controls include HTTPS enforcement, secure cookies, session controls, session fingerprinting, CSRF protection, rate limiting, IP restrictions, role-based permissions, CAPTCHA and activity logs. The antispam module offers reCAPTCHA, Cloudflare Turnstile, hCaptcha, disposable-email blocking and IP blocking.
Multi-factor authentication is listed for before version 1.0, but it is not currently available. The homepage states that the code is licensed under AGPL 3.0; the published facts note a discrepancy with the repository license file.
With self-hosting, the operator controls data, infrastructure, backups and security policies. FOSSBilling is described as beta and under active development, and its FAQ recommends backups and staging tests.
Strengths
Invoices, reminders, recurring and one-time billing, currency handling, promotions, hosting provisioning and domain workflows are brought together in one open-source system.
An extension architecture allows installation of themes, modules, payment gateways, server managers and domain registrars. Listed payment adapters include PayPal, Stripe, Mollie and Razorpay, with documentation advising tests before production use.
The REST API exposes administrator, authenticated-client and public guest endpoints, and its documentation demonstrates calls in cURL, Python and Node.js.
Catches to check
This self-hosted software requires the operator to supply the supported PHP version, database, web server, backups and security controls. It remains beta, with rough edges and limited support while progressing toward version 1.0.
Existing control-panel accounts cannot be imported, and clients do not receive single sign-on to control panels. The hosting documentation notes a minor package-sync bug with Plesk.
Domain prices are manual rather than live. DNS management is still under consideration. Multi-factor authentication is not available yet, and usage-based billing is planned rather than published as a current feature.
Who should skip FOSSBilling
FOSSBilling may not fit a business seeking a hosted service, a phone app, automatic registrar pricing, account imports, control-panel single sign-on or current multi-factor authentication.
Verdict
FOSSBilling suits hosting and digital-service operators who can run Linux-based self-hosted software and manage its infrastructure. Its free AGPL-licensed core covers invoices, reminders, recurring and one-time charges, currencies, promotions, hosting control panels, domains and APIs.
Teams wanting a managed platform, mobile apps, imported control-panel accounts, single sign-on, live registrar prices or multi-factor authentication today may find it less suitable. The beta status, manual domain pricing and need to test payment adapters matter when judging operational fit.
Who it suits
Pick it if
- Hosting providers running their own Linux infrastructure
- Digital-service businesses needing open-source billing
- Teams able to test beta software and payment adapters
Skip it if
- You need a managed service or iPhone/Android app
- You require account imports, single sign-on or current MFA
- You need live registrar pricing or usage billing now
Facts we read
- Anti-spamThe antispam module supports reCAPTCHA v2/v3, Cloudflare Turnstile, hCaptcha, Stop Forum Spam, disposable-email blocking, and IP blocking. · docs.fossbilling.org, Oct 21, 2026
- APIFOSSBilling provides a REST API with admin, authenticated-client, and public guest endpoints. · docs.fossbilling.org, Oct 9, 2026
- API authenticationAuthenticated API calls use HTTP Basic Authentication with an admin or client username and API key. · docs.fossbilling.org, Oct 21, 2026
- Automated billingIt generates invoices, sends payment reminders, and supports recurring and one-time charges. · fossbilling.org, Oct 21, 2026
- BillingIt supports automatic invoices, payment reminders, multiple currencies, recurring and one-time pricing, and promo codes. · docs.fossbilling.org, Oct 9, 2026
- Developer wrapperA bundled JavaScript API wrapper handles CSRF tokens, response parsing, forms, links, and loading indicators. · docs.fossbilling.org, Oct 21, 2026
- Domain limitationDomain prices are set manually per TLD; FOSSBilling does not retrieve live registrar pricing. · docs.fossbilling.org, Oct 9, 2026
- Domain limitsDomain pricing is manually set per TLD, live registrar pricing is not pulled automatically, and DNS management is under consideration. · docs.fossbilling.org, Oct 21, 2026
- Domain managementDomain workflows include registration, renewal, transfer, nameserver changes, contact updates, locking, and privacy controls. · docs.fossbilling.org, Oct 21, 2026
- ExtensibilityThemes, modules, payment gateways, server managers, and domain registrars can be installed through the extension architecture. · docs.fossbilling.org, Oct 21, 2026
- Homepage license statementThe homepage currently describes the project as AGPL 3.0 licensed, creating a discrepancy with the repository license file. · fossbilling.org, Oct 21, 2026
- Hosting limitationsExisting control-panel accounts cannot be imported, and clients do not have single sign-on to control panels. · docs.fossbilling.org, Oct 9, 2026
- Hosting limitsHosting documentation says account imports and single sign-on are unavailable, and Plesk has a minor package-sync bug. · docs.fossbilling.org, Oct 21, 2026
- Hosting provisioningHosting accounts can be provisioned through cPanel/WHM, Plesk, DirectAdmin, HestiaCP, and CWP. · docs.fossbilling.org, Oct 21, 2026
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Questions
Is FOSSBilling free?
Yes. The published FOSSBilling and FOSSBilling core plans are free, open source and self-hosted. No paid plan or free trial is listed.
What billing options does it provide?
It supports invoices, payment reminders, recurring and one-time charges, multiple currencies, exchange-rate synchronization and promo codes. Usage-based billing is planned.
Does FOSSBilling have an iPhone or Android app?
The published platforms list API, Linux, self-hosted and web. They do not list an iPhone, Android or desktop app.
Can hosting accounts be created automatically?
Supported control panels can automatically create and manage hosting accounts, including cPanel/WHM, DirectAdmin, HestiaCP, CWP and Plesk.
Does it import existing control-panel accounts?
No. The hosting documentation says existing control-panel accounts cannot be imported, and clients do not have single sign-on to control panels.
Are domain prices updated automatically?
No. Prices are set manually for each top-level domain, and FOSSBilling does not retrieve live registrar pricing.
Is multi-factor authentication available?
No. The provider lists multi-factor authentication as planned before version 1.0, rather than available now.
What does self-hosting require?
The documented setup requires PHP 8.3, 8.4 or 8.5, a MySQL-compatible database, and Apache, LiteSpeed/OpenLiteSpeed or NGINX.
Is FOSSBilling yours?
Claim it for free to correct a fact, and see the places you can buy on The Finance Base.