Payment Processing Tools

Best Payment Processing tools by public signals

These picks are computed from scored public evidence. Use the openness column in the ranking to separate OSI-approved, source-available, open-core, proprietary, and unverified-license tools.

Best overallPolar99 score License-safe pickPolarOSI-approved OSS Fastest shippingPolar98 shipping

Use Case Rankings

Ordered by ToolVitals score, health, shipping, confidence, and then adoption as a tie-breaker.

#	Tool	Health	Shipping	Openness	Stars	Score	Status
01	Polar Turn your software into a business.	98	98	OSI-approved OSS	10.1k	99	Active
02	Hyperswitch An open source payments switch written in Rust to make payments fast, reliable and affordable	94	89	OSI-approved OSS	43.4k	94	Active
03	OwnPay The premier self-hosted, open-source payment gateway automation platform. Professional, secure, and developer-first.	76	84	OSI-approved OSS	106	85	Active
04	lomi. The open-source payment processing platform powering West African businesses.	71	81	OSI-approved OSS	38	82	Warning
05	Lemon Squeezy All-in-one platform for selling digital products and SaaS subscriptions.	87	67	Proprietary target	—	80	Active
06	XCash Open-source self-hosted cryptocurrency payment gateway.	74	70	OSI-approved OSS	164	79	Warning
07	Zoneless Open-source Stripe Connect alternative. ~$0.002 payout fees. Identical API to Stripe. Instant global USDC payouts. Self-hosted.	63	53	OSI-approved OSS	336	69	Warning
08	PipraPay Open-source plugin-based payment gateway platform for self-hosted payment operations and automation.	56	27	OSI-approved OSS	219	57	Warning
09	Bitcart Bitcart is a free and open-source self-hosted payment processor for BTC, LTC, BCH, XMR, ETH, TRX, USDT and more	60	16	OSI-approved OSS	969	55	Warning
10	Flowglad Open source, zero webhooks payment provider	47	6	License unknown	1.7k	43	Critical
11	React Native Iap In App Purchase module for React Native that confirms OpenIAP	37	7	OSI-approved OSS	3.2k	42	Critical