Best Payment Processing Software in 2026
Updated
In short: Helcim is ranked #1 of 68 as of 4 October 2026, ahead of Airwallex Payments and Kill Bill. The best-ranked option with a free plan is Airwallex Payments. The lowest first paid tier on this page is SumUp Invoices at £7/mo.
Accepting payments can involve different methods, channels, billing patterns, and payout arrangements. Compared on payment methods, in-person payments, payment links, and recurring billing, these options also specify multi-currency support and payout schedules. Consider which ways of taking payment fit your business, and how the timing of payouts aligns with your needs. Free-plan availability and paid-from pricing provide additional points for weighing access and cost. Helcim, Airwallex Payments, and Kill Bill are among the entries to examine, with Mollie and PayPal Invoicing also named. Use the listed capabilities to compare payment arrangements and billing needs without overlooking how funds are received.
68 payment processing software ranked on what their makers publish — plans and prices, free tiers, platforms and the facts on their own pages.
9 of the 25 here have a free tier you can use, 0 have open-source code on record, and 0 have full bars: free, open, on most of your devices and documented.
| # | App | Signal | Free tier | Open code | Devices | From | Score |
|---|---|---|---|---|---|---|---|
| 1 | HelcimWeb · Windows · Mac · Android · iPhone · API | Three bars | — | 5 of 6 | Free | 6.7 | |
| 2 | Airwallex PaymentsWeb · Android · iPhone · API | Three bars | — | 3 of 6 | $12/mo | 6.6 | |
| 3 | Kill BillWeb · Windows · Mac · Linux · Self-hosted · API | Three bars | — | 4 of 6 | Free | 6.6 | |
| 4 | MollieWeb · Android · iPhone · API | Three bars | — | 3 of 6 | €9/mo | 6.6 | |
| 5 | PayPal InvoicingWeb · Android · iPhone | Three bars | — | 3 of 6 | Free | 6.6 | |
| 6 | Checkout.comWeb · Android · iPhone · API | Three bars | — | 3 of 6 | Free | 6.5 | |
| 7 | SumUp InvoicesWeb · Android · iPhone | Three bars | — | 3 of 6 | £7/mo | 6.5 | |
| 8 | MobilePayAndroid · iPhone | Two bars | — | 2 of 6 | Free | 6.4 | |
| 9 | Checkout PageWeb | Two bars | — | 1 of 6 | $24.17/mo | 6.3 | |
| 10 | Pin PaymentsWeb · iPhone · API | One bar | — | — | 2 of 6 | — | 5.5 |
| 11 | Cashfree PaymentsWeb · Android · iPhone | Two bars | — | — | 3 of 6 | — | 5.4 |
| 12 | CIT VericashWeb · Android · iPhone | One bar | — | — | 3 of 6 | — | 5.4 |
| 13 | Pine Labs Online PaymentsWeb · Android · iPhone | Two bars | — | — | 3 of 6 | — | 5.4 |
| 14 | PlastiqWeb · Android · iPhone | Two bars | — | — | 3 of 6 | — | 5.4 |
| 15 | Privacy.comWeb · Android · iPhone | One bar | — | — | 3 of 6 | — | 5.4 |
| 16 | 2C2PWeb · Android · iPhone | One bar | — | — | 3 of 6 | — | 5.3 |
| 17 | CashNotifyWindows · Mac | No signal | — | — | 2 of 6 | — | 5.3 |
| 18 | doxoWeb · Android · iPhone | One bar | — | — | 3 of 6 | — | 5.3 |
| 19 | Kakao PayAndroid · iPhone | No signal | — | — | 2 of 6 | — | 5.3 |
| 20 | Kasera PayWeb | One bar | — | — | 1 of 6 | — | 5.3 |
| 21 | CCBillWeb | No signal | — | — | 1 of 6 | — | 5.2 |
| 22 | Clover POSWeb · Android · iPhone | Two bars | — | — | 3 of 6 | — | 5.2 |
| 23 | dLocalWeb | No signal | — | — | 1 of 6 | — | 5.2 |
| 24 | Lightspeed PaymentsWeb · Android · iPhone | Two bars | — | — | 3 of 6 | — | 5.2 |
| 25 | NaturalWeb | No signal | — | — | 1 of 6 | — | 5.2 |
Is your app on this list?
Numbered spots on this list can be sponsored. They are labelled, and the editorial order and scores never change for payment.
Questions about this list
Which payment processing software is ranked first on Freedom251?
Helcim is ranked #1 of 68 with a score of 6.7. Airwallex Payments is second and Kill Bill third.
How many of these have a free plan?
9 of the 25 on this page publish a free plan on their own pricing pages.
Which is the cheapest paid option?
On this page, SumUp Invoices has the lowest first paid tier we found: £7/mo.
How is this list ranked?
Ranked free-and-open first: a usable free tier and open-source code, then the platforms it runs on and its documentation. Paid placements never change a rank.