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Obsessed with the

merchant experience.

We empower our partners to connect seamlessly with merchants and their customers.

Payments as a Service Platform

We partner with acquirers and payment providers to deliver exceptional merchant experiences. Our bank-grade, Payments as a Service platform and scalable cloud-based technology seamlessly connects the world of commerce into payments.

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Integrated (POS) 
In-store Solutions

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Value-added Services

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Customer Success & Support


Cloud-based API Integration Layer


Modern Merchant Dashboard

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Real-time Support Monitoring

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"Our partnership with mx51 has helped us go to market with one of the most technologically advanced payments solutions in the world. Our collaboration has delivered fast and seamless payment integration for our merchants coupled with unique real time monitoring technology to provide an unprecedented level of reliability, service & support."

Westpac Banking Corporation

Payment as a Service Platform

We offer a white-label, bank-grade Payment-as-a-Service (PaaS) cloud platform that holds PII data for acquirers and payment providers. Our state-of-the-art PaaS platform for transaction processing enables faster delivery of compelling merchant propositions that solve for multi-channel payment needs.

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In the news

Here's what people are saying about us.

The Australian Financial Review May 11, 2020

Westpac backs mx51 to tackle global payments invasion

Westpac Banking Corp is backing a new payments spin-off – mx51 – to help it fend off an invasion by global payments software companies threatening banks’ profitable lending and deposit relationships with merchant customers.

mx51 has been created out of Assembly Payments, in which Westpac is also an investor, alongside its venture capital fund Reinventure Group.