Privy and Spark are teaming up to make it radically easier to build Bitcoin-powered apps. With Privy’s seamless embedded wallets and Spark’s fast, low-cost payments infrastructure, developers can now onboard users in seconds.

With Spark, we’re making it dead-simple to build apps with Bitcoin under the hood. Spark is a payments-focused network designed to move BTC and Bitcoin-native assets (including stablecoins) instantly, at almost zero cost — without sacrificing UX or compromising user sovereignty. 

But building is only half the battle. For Bitcoin to move in your product, it must be seamless for your users. And while that sounds simple, the reality is anything but. Wallet UX is where most crypto apps lose people. Users are picky — and the moment you introduce something unfamiliar (seed phrases, browser extensions, signing flows), they bounce.

After months of talking with founders, wallet teams, and protocols, one name came up repeatedly: Privy. The advice was always the same: “If you care about UX and security and want real self-custody, use Privy.”

So that’s what we’re doing.

Today, we’re excited to announce our partnership with Privy.

Privy has become the go-to for bringing crypto newcomers onchain. Their wallet infrastructure is used across the stack — from solo builders to top protocols like OpenSea, Farcaster, and Hyperliquid — they embed wallets directly into products, abstracting all the complexity and making onboarding seamless.

What does that mean?

Developers can now onboard users into Spark wallets in seconds. No browser extensions. No seed phrases. Just clean, instant onboarding — like signing up for any other app. Login → Spark wallet → send and receive BTC or stablecoins.

Together, this unlocks a new design space:

• Apps that offer Bitcoin & stablecoin payments, natively on Bitcoin
• Embedded wallets that feel invisible to users
• User-owned wallets without any UX friction
• Composable apps that onboard users in seconds — no external wallets needed

About Spark

Spark is the fastest, cheapest, most UX-friendly way to build financial apps and launch stablecoins on Bitcoin. It supports native BTC and stablecoin transfers with instant settlement, near-zero fees, and full Lightning compatibility.

Spark will soon be open-source and live.

Follow on X @buildonspark

About Privy

Privy is the embedded wallet stack trusted by the most forward-thinking crypto and fintech teams. It lets developers onboard users with email, social, or existing wallets — and spin up self-custodial accounts with secure key management, full portability, and seamless UX. All via one API.

Learn More about Privy at privy.io →