Best Open Source Alternatives to Authorize.Net

Compare the best free and open-source alternatives to Authorize.Net — self-hosted and desktop replacements you fully control, ranked by GitHub stars, license and platform support.

Curated by open-source.store · Updated August 2026 · 3 alternatives

Authorize.Net

Proprietary SaaS

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Authorize.Net alternatives compared

Open-source alternatives to Authorize.Net, compared by stars, license and platform
Tool		License	Platforms	Self-hosted
Hyperswitch	43,381	Apache-2.0	LinuxmacOSWindowsDocker	Yes	Aug 2026	Visit
Invoice Ninja	9,950	AGPL-3.0	LinuxmacOSWindowsDocker	Yes	Jul 2026	Visit
Kill Bill	5,644	Apache-2.0	LinuxmacOSWindowsDocker	Yes	Jul 2026	Visit

Top open-source Authorize.Net alternatives

Hyperswitch43,381Apache-2.0

Fast, open-source payment router to connect with multiple payment processors and reduce transaction costs.

LinuxmacOSWindowsDockerWeb

vs Authorize.Net: a free, open-source option you fully control, licensed Apache-2.0.

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Invoice Ninja9,950AGPL-3.0

Full-featured open-source invoicing and billing app for freelancers and businesses with payment integrations.

LinuxmacOSWindowsDockerWeb

vs Authorize.Net: a free, open-source option you fully control, licensed AGPL-3.0.

Visit Details

Kill Bill5,644Apache-2.0

Open-source billing and payment platform for subscription management and integration.

LinuxmacOSWindowsDockerWeb

vs Authorize.Net: a free, open-source option you fully control, licensed Apache-2.0.

Visit Details