Assembly Line

Alternatives to Adyen in 2026

9 commercial products, led by Checkout.com, Stripe Payments and PayPal Braintree. 5 open-source projects you can run yourself, led by Btcpayserver, Bitcart and Open Payment Host.

Open source

  1. 1
    Btcpayserver btcpayserver

    Accept Bitcoin payments. Free, open-source & self-hosted, Bitcoin payment processor.

    Complete system Production-ready You want to accept Bitcoin directly into your own wallet without a third-party processor.

    ★ 7.9k MIT C# Active, pushed today
  2. 2
    Bitcart bitcart

    Bitcart is a free and open-source self-hosted payment processor for BTC, LTC, BCH, XMR, ETH, TRX, USDT and more

    Complete system Usable You want to accept several cryptocurrencies, not just Bitcoin, on your own server.

    ★ 1k MIT Python Active, pushed today
  3. 3
    Open Payment Host abishekmuthian

    Sell what you want without paying double commissions. Self hosted alternative for Gumroad, Buy Me a Coffee, Ko-fi etc.

    Complete system Experimental You sell a few digital products and want to avoid platform commissions on top of Stripe fees.

    ★ 243 AGPL-3.0 Go Active, pushed 34 days ago
  4. 4
    OwnPay own-pay

    Self-hosted, open-source payment gateway. Manage brands, gateways, and transactions on your own infrastructure.

    Complete system Experimental You want to test a self-hosted gateway layer over local payment methods and can audit it.

    ★ 213 AGPL-3.0 PHP Active, pushed today
  5. 5
    PipraPay PipraPay

    Empower your payment operations with PipraPay, the free and open-source, plugin-based platform for automated payments and full workflow control.

    Complete system Experimental You sell online in Bangladesh and want to automate mobile wallet payment confirmation yourself.

    ★ 330 AGPL-3.0 PHP Slowing, pushed 5 months ago

Commercial

  1. 1
    Checkout.com Checkout.com

    Boost your acceptance rate, cut processing costs, fight fraud, and create extraordinary customer experiences with Checkout.com's payment solutions.

    Building block Production-ready A high-volume online merchant, especially in Europe or the Middle East, wants negotiated rates and acquiring in many markets.

    994 readers a month Commercial
  2. 2
    Stripe Payments Stripe, Inc.

    Capture more revenue with a unified payments solution that eliminates the need for one-off merchant account, payment gateway, and processor integrations.

    Building block Production-ready You need to accept payments online and want the best-documented API with wide country coverage.

    Commercial
  3. 3
    PayPal Braintree PayPal

    Explore PayPal Braintree and how our end-to-end payment platform can help drive growth. Learn more about PayPal Braintree on the PayPal website.

    Building block Production-ready You want card processing and PayPal or Venmo checkout through one integration.

    Commercial
  4. 4
    GoCardless GoCardless

    Collect and send payments, minimise failures, and fight fraud. No more chasing payments and no expensive card fees.

    Complete system Production-ready You collect regular invoices or subscriptions and want lower fees and fewer failures than cards.

    406 readers a month Since 2011 Commercial
  5. 5
    Authorize.net Visa Inc.

    Authorize.net is an online payment system and credit card payment processor. We provide secure credit card payment processing systems for subscriptions, retail, and mobile, serving as your trusted credit card processor for low‑cost eChecks/ACH.

    Building block Production-ready A US merchant has an existing merchant account or software that integrates only with Authorize.net.

    84 readers a month Since 1996 Commercial
  6. 6
    Worldpay Worldpay

    We power global commerce by providing exceptional payments technology and expertise to businesses. Find out how Worldpay can help you.

    Building block Production-ready A large retailer or established merchant wants a major acquirer with in-store and online acceptance.

    9 readers a month Commercial
  7. 7
    Mollie Mollie

    One platform to accept payments, manage money, and access funding. Eliminate financial friction and grow your business with Mollie.

    Building block Production-ready A European small or midsize merchant wants simple pricing and broad local payment methods.

    Commercial
  8. 8
    Square Online Payments Block, Inc.

    Building block Production-ready A business already using Square in store wants online payments on the same account and reporting.

    Commercial
  9. 9
    Razorpay Razorpay

    Online Payments India: Start Accepting Payments Instantly with Razorpay

    Building block Production-ready A business selling to customers in India wants local payment methods, especially UPI.

    Commercial

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