Alternatives

Products that do what Open-source SDK to prevent duplicate payments and card does

1HO
Hyperledger – Open Payments Protocol▲112
2014 · hyperledger.com
2OA
Offst – A decentralized payment system▲52
2019 · freedomlayer.org
3DO
Deck of Cards – A playing card API▲255
2015 · deckofcardsapi.com
4AO
An open-source financial ledger API written in Clojure▲125
2020 · github.com
5EE
Emburse – Employee Debit Cards with Oversight▲37
2016 · emburse.com
6OC
Offset – Credit card powered by trust between people▲150
2020 · offsetcredit.org
7
Paylike▲86
A modern full-stack payment platform
2015
8CC
Credit card payments API for blockchain▲5
2017 · connextapi.com
9
Braintree v.zero SDK▲79
A modern foundation for accepting payments
2014
10WA
Walletjs – A little library to handle money amounts▲23
2017 · github.com
11US
UPUP Simple Credit Card Verification to Reduce Fraud▲41
2020 · upupapp.io
12YP
Your personal payment processing server▲11
2015 · medium.com
13BJ
Billhook.js – Stripe recurring payment made easy for developers▲5
2020 · billhook.io
14KC
Killing credit cards – meet Bits, a privacy first borrowing app▲13
2019 · getbits.app
15IM
I'm open sourcing Creditly.js, an intuitive credit card form▲34
2014 · wangjohn.github.io
16BP
Balanced Payments Client for Go▲9
2014 · github.com
17CC
CLEAR Card – AI powered credit card for startups▲20
2016 · getclear.io
18RS
Routable – Simplest B2B Payments▲7
2019 · routable.com
19NA
Nimiq: A Frictionless Payment Protocol Native to the Web▲8
2017 · medium.com
20SD
Six Degrees of Venmo – Visualizing your payment network▲28
2015 · venweb.heroku.com
21IA
Invoicer, a Minimalist Billing App▲12
2021 · github.com
22RA
RNet, an AI credit wallet for everyday users▲6
Jul 2026 · rnetai.org
23PO
Paykit – one SDK for Stripe, PayPal, Paddle (stop reading 5 API docs)▲8
Oct 2025 · usepaykit.dev
24CB
ChargeDesk – Billing Support for Startups▲14
2014 · chargedesk.com

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