Digital public infrastructure, explained and examined

The roads of the digital economy are being laid now.

Identity systems, instant payments and data exchange layers are becoming as basic as roads and power lines. Public Rails explains how they work, compares how countries built them, and asks who governs them and who gets left out.

Start with the basicsRead the case studies

Many railway tracks converging and crossing through sets of points at a large junction, with a city skyline in the distance
Tracks and points at Clapham Junction, London. Photo: Bill Boaden, CC BY-SA 2.0, via Wikimedia Commons.
Layer 01

Identity

Proving who you are, online and off, without becoming trackable everywhere.

Digital ID safeguards
Layer 02

Payments

Instant, interoperable transfers between any bank or app, at any hour.

UPI and instant payments
Layer 03

Data exchange

Letting systems ask each other, lawfully and with consent, instead of asking you again.

Data exchange layers
Black and white photograph of the Manhattan Bridge under construction in 1909 Featured analysis

What makes digital public infrastructure good, not just big?

From the G20 to the UN's 50-in-5 campaign, everyone wants DPI. Five tests separate systems people can rely on from systems that are merely large: purpose, reach, rights, markets and resilience.

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Case studies

All case studies

How specific countries built their rails, what worked, and what does not transfer.

Detail of a black and white cadastral map showing numbered land parcels, streets and houses around the village of NagykozárCase studies

Digital land registries and open property data

Estonia, Dubai and HM Land Registry compared: what each registry opens up, how AI valuation models use it, and the safeguards.

 Panoramic view over the red roofs and church spires of Tallinn's old town under a clear skyCase studies

Estonia's X-Road

The federated data exchange layer launched in 2001, how it works, how it went open source and cross-border, and what transfers elsewhere.

 Facade of a tall public housing block in Singapore with rows of windows and coloured panelsCase studies

Singapore: Singpass, Myinfo, PayNow

A two-decade-old login that became a national identity platform, consent-based data sharing, and instant payments that cross borders.

 A hand placed flat on an illuminated fingerprint scanner at a service deskCase studies

MOSIP and open-source identity

A modular, vendor-neutral identity platform started in 2018, used by national programmes from the Philippines to Ethiopia.

 Baskets of potatoes, tomatoes and green beans piled on a market stallCase studies

UPI and instant payments

How UPI works, why it grew, how it compares with Pix and Europe's rules, and the questions that remain open.

 Two goods lorries on a curving divided highway lined with trees in Gujarat, IndiaCase studies

GSTN and India's GST

How a shared tax platform with open APIs for private providers became the backbone of India's GST, and what it teaches.

Latest analysis

All analysis
A green retractable tape measure partly extended across a white backgroundAnalysis

Measuring DPI impact

Why adoption is not impact, what the evidence from India shows, and a practical set of indicators that goes further.

 Close-up of a monitor showing lines of colour-highlighted source codeAnalysis

Open source or proprietary?

Lock-in, cost, security and skills: what national policies say, and a decision framework for public infrastructure.

 An empty meeting room with a long wooden table, chairs and bookshelves under arched windowsAnalysis

Who governs DPI?

Operator models, the accountability that matters, and what the UN safeguards framework and the 50-in-5 campaign add.
Section

Guides

Plain-language explainers for civil servants, students, journalists and builders who need a reliable starting point.

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