The UK Government’s recent response on Smart Data opportunities highlights the growing focus on trusted, scalable data-sharing ecosystems beyond open banking.

Open banking is no longer being viewed as a standalone innovation within financial services. Increasingly, it is being treated as the blueprint for how secure, permissioned data-sharing ecosystems can operate across entire sectors.

That shift matters because the conversation is evolving. The challenge is no longer simply how to open access to data. It is how to do so safely, consistently and at scale.

As governments and regulators across the UK, Europe and beyond move towards broader open finance and smart data ecosystems, a new reality is emerging: APIs alone are not enough.

The next phase of digital transformation will depend on trust infrastructure.

Open Banking was the Starting Point

Open banking and PSD2 in the UK and the EEA demonstrated that secure, standardised data sharing can drive competition, innovation and consumer choice. It enabled new business models, improved payment experiences and accelerated fintech growth across multiple markets.

In the UK alone, open banking adoption has reached millions of consumers and businesses, showing that when ecosystems are properly governed, users are willing to engage with permissioned data-sharing models.

But open banking also revealed the operational complexity that sits behind these ecosystems.

As the number of participants and use cases has expanded, so have challenges around:

• Identity verification
• Permission management
• Participant oversight
• Cross-border access
• Fraud prevention
• Auditability and compliance monitoring

Those challenges become even greater as ecosystems move beyond payments into broader smart data and open finance environments.

Smart Data and Open Finance are Expanding the Ecosystem

The UK Government’s Smart Data response reinforces the ambition to extend data portability and secure data-sharing principles into sectors such as energy, telecoms and retail.

At the same time, the FCA’s Open Finance roadmap points towards a future where consumers and businesses can securely share a much wider range of financial data – including savings, investments, pensions, mortgages and insurance products.

In Europe, FiDA (the Financial Data Access Regulation) takes this concept even further by establishing a framework for open finance across the EU.

Collectively, these initiatives represent a significant expansion in both the scale and complexity of connected ecosystems.

Under FiDA alone, thousands of financial institutions, fintechs, data users and scheme participants may eventually need to interact across multiple sectors and jurisdictions. That creates an important question for the market:

How do ecosystem participants know they can trust one another in real time?

APIs Are Only Part of the Story

Much of the discussion around open data ecosystems still focuses heavily on APIs and technical connectivity.

But connectivity is only one part of the equation.

In reality, scalable open ecosystems require a foundational layer of trust infrastructure that enables participants to verify identities, validate permissions, confirm regulatory status and maintain continuous oversight of ecosystem access.

Without that trust layer, ecosystems risk becoming fragmented, operationally inefficient and increasingly exposed to fraud, compliance failures and systemic risk.

This becomes particularly important as PSD3 and the Payment Services Regulation (PSR) introduce stronger expectations around:

• Ongoing participant monitoring
• Fraud management
• Real-time oversight
• Ecosystem accountability
• Evidence-based compliance controls

The direction of regulation is becoming increasingly clear: trust can no longer be assumed; it must be continuously demonstrated.

Governance will Define Successful Ecosystems

One of the most important lessons from open banking globally is that successful ecosystems depend just as much on governance as they do on technical standards.

Questions such as who is allowed into an ecosystem, how participants are verified, how permissions are maintained and how changes are monitored become increasingly critical as ecosystems scale.

This is especially relevant in Europe, where organisations may operate across multiple jurisdictions using passporting rights while simultaneously participating in different schemes and frameworks.

The operational challenge is no longer simply onboarding participants. It is maintaining continuous confidence in their status, permissions and regulatory standing over time.

Manual processes and fragmented verification checks quickly become unsustainable in this environment.

That is why trust infrastructure is becoming such a critical component of modern data-sharing ecosystems.

From Connectivity to Confidence

The future of smart data and open finance will not be defined solely by access to data. It will be defined by confidence in the ecosystem itself.

Consumers, regulators and institutions all need assurance that:

• Participants are legitimate
• Permissions are valid
• Ecosystem rules are being followed
• Access rights remain current
• Risks are being continuously monitored

This becomes even more important as financial ecosystems become more interconnected and cyber threats continue to evolve.

Under FiDA, open finance is expected to extend beyond banking into investments, pensions, insurance and other highly sensitive financial products. As the ecosystem expands, so too does the importance of ensuring that access rights, permissions and participant identities can be trusted in real time.

The next phase of open ecosystems, therefore, requires a shift in mindset. Initially, open banking focused on enabling connectivity between institutions. It must now focus on enabling confidence at scale.

That means moving beyond fragmented directories and periodic compliance checks towards continuous, real-time ecosystem assurance. It means embedding governance, participant oversight, identity verification and auditability directly into the operational fabric of smart data ecosystems.

The opportunity presented by Smart Data, Open Finance, PSD3, PSR and FiDA is enormous. These frameworks have the potential to unlock greater innovation, competition, financial inclusion and economic growth across multiple sectors. 

But their long-term success will depend on whether ecosystems can establish trusted, scalable operational foundations. Because in the emerging data-sharing economy, trust is no longer simply a supporting function; it is becoming the infrastructure itself.