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Stripe-Backed Blockchain Tempo Starts Testnet; Kalshi, Mastercard, UBS Added as Partners
Tempo, built by Stripe and Paradigm, has started testing payment-focused blockchain and has onboard a slew of institutional partners.
Dec 9, 2025, 3:49 p.m.
What to know:
- Stripe and Paradigm’s Tempo blockchain has launched its public testnet for real-world payment testing.
- Kalshi, Klarna, Mastercard and UBS are among a wave of new institutional partners now involved in the project.
- Tempo aims to offer low-cost, fast-settlement infrastructure for global payments as stablecoin adoption is accelerating globally.
Tempo, a payments-focused blockchain backed by Stripe and crypto investment firm Paradigm, has launched its public testnet, a key step in its effort in making stablecoin payments for mainstream use.
Tempo has also unveiled a roster of new additions to the network’s partner group, including buy-now-pay-later firm Klarna, predictions market Kalshi, payments giant Mastercard and Swiss global bank UBS. They join a group of earlier design partners such as Deutsche Bank, Visa, Shopify, OpenAI and Nubank.
STORY CONTINUES BELOW
Initially introduced in September, Tempo is designed to handle high-volume financial transactions with low fees, instant finality and native support for stablecoins. With the testnet now being live, developers and corporate partners can begin experimenting with real-world payments on-chain.
The move fits into the latest trend of building blockchains for stablecoin payments as adoption of digital dollar is soaring globally. Currently a $300 billion asset class, stablecoins are projected to become an integral part of cross-border payment rails with business-to-business (B2B), peer-to-peer (P2P) and card payments driving growth, a recent report by Keyrock and Bitso said.
Tempo aims to solve common pain points in blockchain-based finance, like network congestion and volatile transaction fees. The network charges around one-tenth of a cent per transaction, payable in U.S. dollar-denominated stablecoins and eliminating the need for a volatile gas token.
The news comes on the heels of Bridge, Stripe's stablecoin infrastructure firm, helping Klarna issue its own digital dollar next year.
Read more: Why Circle and Stripe (And Many Others) Are Launching Their Own Blockchains
AI Disclaimer: Parts of this article were generated with the assistance from AI tools and reviewed by our editorial team to ensure accuracy and adherence to our standards. For more information, see CoinDesk's full AI Policy.
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