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South Korea Super-App Toss to Run Won Stablecoin Pilot on OP Stack | The Defiant

Toss, South Korea's 30-million-user fintech super-app, is running a three-month pilot of a Korean won stablecoin on Optimism's OP Stack, with privacy tools from Sunnyside Labs to shield transaction data whilst maintaining compliance. This is the fourth regulated financial institution in a year to adopt OP Stack, after Bitpanda, Kraken and Mitsui, signalling institutional confidence in the framework for regulated digital currencies.

This Wire brief sits within Fusion42's coverage of Fintech. Wire is Fusion42's founder-focused intelligence feed: each story is connected to the funds and startups it names — every one with a live profile on Raise or Scout — so founders can follow the capital and the momentum behind the headline rather than just the headline itself. Wire analysis is one of the live surfaces Arthur, Fusion42's AI co-founder, reasons over.

The Wire takeaway

If you're building compliance or privacy tooling for regulated finance, you now have proof that a 30-million-user institution will buy it. Toss's three-month pilot is a live reference customer for whoever can solve transaction privacy on public chains without breaking KYC.

Read the full story at thedefiant.io

Topics: Fintech · stablecoin · op-stack · krw · compliance-privacy · asia-expansion

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Verified 12 July 2026 · Sources: Fusion42 review