Composability is the ability to build your wallet stack piece by piece—choosing your own auth, onboarding, and UX. Instead of inheriting a fixed experience from a third-party service, you define it end to end.

If you’ve built with other SDKs, you know it’s fast but rigid. Composability is like building your own checkout flow—tailored to your users, optimized for your context, and fully under your control.

So why build your own when someone else offers it pre-packaged?

Because when you control the flow, you control the conversion, the UX, the brand experience—and most importantly, you keep the value you create. Third-party systems are designed to benefit the provider. Yours isn’t. Whether it's removing unnecessary steps, aligning with your app’s tone, or embedding invisible security, a custom wallet flow lets you meet users where they are—without forcing them into someone else's funnel. It’s the difference between borrowing a funnel and owning the experience.

Wallet UX isn't just one surface—it’s a stack. A composable wallet layer gives you control across each of these:

• Wallet Creation: Spin up wallets on-device, only when needed, anywhere in your flow.

• Auth & Onboarding: Use passkeys, biometrics, email—or skip login entirely.

• Key Custody: Store keys locally in the secure enclave—not with a provider.

• Data Ownership: Wallet usage stays in your app—not exposed to third-parties.

Most wallet-as-a-service platforms aren’t built for composability or developer ownership. They offer convenience at the cost of control. You’re often stuck with:

• Predefined login and recovery flows (e.g., forced social logins)

• Opaque custody models

• Vendor-side tracking and analytics

You don’t just integrate the SDK—you give away the value you’re creating.

RallyProtocol was designed from the ground up as an unopinionated, mobile-first wallet engine. It gives developers the primitives—key creation, storage, signing, recovery—to build their own stack. No branding. No external custody. No prescribed flows.

• Open-source and permissionless: No signup, no TOS, no gatekeeping.

• On-device custody: Keys never leave the user’s device.

• Invisible integration: Wallets live inside your app—not as overlays or modals.

• Composable SDKs: Use only what you need. Bring your own auth and UX.

Recent failures in centralized wallet infrastructure expose the risks of outsourcing control:

• Coinbase’s social hack: Support-side breach exposed user data, enabling phishing and ~$200M in fallout.

• Loopring Wallet shutdown: Discontinued its smart wallet and app, forcing manual user migration.

When wallet infrastructure is opaque or centralized, users suffer—but developers are the ones who lose trust and retention.

RallyProtocol gives you the building blocks, not the blueprint. It’s the invisible wallet layer that adapts to your app—not the other way around.

If you believe wallets should be part of your app—not bolted on—then composability isn’t a luxury. It’s the only way forward.

RallyProtocol is a wallet toolkit for mobile developers who want full ownership of their app’s onchain experience. It provides key management and recovery components for embedding secure, on-device wallets—no custody layers, no forced UX, and no centralized gatekeepers. Permissionless, open source, and built for vertical integration.

Your wallet. Your app. Nothing in between. Start building at rallyprotocol.com.