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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.

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Mastercard and Westpac-backed start-up bucks market with $32.5m raise

The Australian Financial Review July 19, 2022

Mastercard and Westpac-backed start-up bucks market with $32.5m raise

Westpac-backed payments technology start-up mx51 has bucked the broader gloom in local tech investment circles, closing a $32.5 million funding round that more than doubled its valuation.

The funding round included a raft of returning investors from its previous capital raisings including payment heavyweight Mastercard and venture capital operators Acorn Capital, Commencer Capital, Rampersand and Artesian.

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Westpac-backed fintech startup mx51 raises $25m

The Australian Financial Review May 24, 2021

Westpac-backed fintech start-up mx51 raises $25m

Westpac-backed banking technology company mx51 has raised $25 million only a year after splitting from Assembly Payments, having already processed $1 billion of transactions.


Founded by former Westpac executive and Assembly Payments co-chief executive Victor Zheng, mx51 offers a white label solution for banks and non-bank acquirers to offer merchants a multi-channel payments platform, which rivals the likes of Stripe, Tyro and Square.

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