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Flint

FLINT is a C library for doing number theory, maintained by William Hart. FLINT was licensed GPL v2+ up to and including version 2. 5. Our current development version (and subsequent releases) are licensed LGPL v2.

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Top 3 Open-Source Alternatives to Flint

Stripe UniPayGateway The new Mollie

Product categories

Online Payments Payment Gateways Payment Platform Payment Solution Payments Processing Recurring Billing Recurring Payments Recurring Subscription Billing eCommerce Tools

Summary

The top open-source alternatives to Flint are Stripe, UniPayGateway, and The new Mollie. One of the criteria for ordering this list is the number of mentions that products have on reliable external sources. You can suggest additional sources through the form here.
  1. Stripe Landing Page
    Stripe Landing Page
    1

    Stripe

    Online payment processing for internet businesses. Stripe is a suite of payment APIs that powers commerce for online businesses of all sizes. Use Stripe’s payment platform to accept and process payments online for easy-to-use commerce solutions.
    Pricing:
    • Open Source

    #Online Payments #Recurring Billing #eCommerce Tools 240 social mentions

  2. UniPayGateway Landing Page
    UniPayGateway Landing Page
    2

    UniPayGateway

    Ultimate payment gateway software for merchants, ISOs and PSPs. Full range of payment gateway capabilities. Functionality rich open source payment system.
    Pricing:
    • Open Source
    • Paid

    #Payments Processing #Online Payments #Payment Gateways

  3. The new Mollie Landing Page
    The new Mollie Landing Page
    3

    The new Mollie

    Clever payment products for great companies of all sizes.
    Pricing:
    • Open Source

    #Online Payments #Payment Platform #Recurring Billing 3 social mentions

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