Web3Auth

Web3Auth is a Wallet-as-a-Service (WaaS) infrastructure platform that enables developers to embed non-custodial wallets into applications using familiar Web2 authentication flows — social logins, passkeys, email OTP — eliminating the seed phrase barriers that have historically blocked mainstream crypto adoption. Acquired by Consensys in June 2025 and now operating as MetaMask Embedded Wallets, it continues to serve Solana and multi-chain developers through the same underlying SDK infrastructure.

Core Mechanism

The foundation of Web3Auth is Threshold Key Infrastructure (TKI), which implements Multi-Party Computation (MPC) to distribute cryptographic key management across independent parties. Rather than storing a private key in one location, the system splits key shares across a user's device, a distributed network of Web3Auth nodes, and an optional social or hardware recovery factor. No single party — including Web3Auth itself — ever possesses a complete private key. This achieves the UX of a custodial login while preserving true non-custodial ownership: users control their wallets without ever seeing or backing up a seed phrase.

When a user authenticates via Google, for example, the OAuth token triggers a threshold signature scheme that recombines the required shares locally within the application, producing valid signatures without assembling the full private key in any one place. The same architecture supports multiple recovery paths: a second registered device, a social recovery link, or a hardware key — giving users several options to regain access without relying on a single backup.

Key Products and Features

Web3Auth ships SDKs across a broad range of deployment targets:

• Web SDKs: Plug-and-play and Core SDKs in JavaScript and TypeScript for React, Angular, Vue, and plain HTML.
• Mobile SDKs: Native integrations for iOS (Swift), Android (Kotlin), React Native, and Flutter.
• Gaming SDKs: Unity and Unreal Engine integrations for wallet functionality embedded directly in games.
• Telegram Mini App SDK: Purpose-built for Telegram-native applications.

Authentication options cover social logins (Google, X/Twitter, Discord, GitHub, Apple), passwordless flows (email OTP, SMS, passkeys), and custom JWT-based authentication connecting to existing identity providers such as Firebase, Auth0, or Cognito.

Post-login services extend the platform beyond key management:

• Native Account Abstraction: Gasless transactions and smart account support via ERC-4337.
• Whitelabel Wallet UI: Fully embeddable wallet interface customizable to application branding.
• Fiat On-Ramp Aggregator: Over 100 payment methods for in-app crypto purchasing.
• Wallet Pre-generation: Server-side wallet creation ahead of user onboarding, enabling airdrop and token-distribution flows.
• NFT Services: Minting and management through the wallet infrastructure layer.

The platform's free tier covers the first 1,000 Monthly Active Wallets (MAWs), with enterprise pricing available for larger deployments. Web3Auth operates on Kubernetes-based infrastructure with horizontal scaling across multiple regions, and claims sub-800ms global login speeds.

Solana Ecosystem Integration

Web3Auth explicitly supports Solana alongside Bitcoin, Sui, Aptos, Cardano, TON, NEAR, StarkNet, THORChain, dYdX, and all EVM-compatible chains. For Solana developers, the platform provides:

• Social login and custom auth flows that generate Solana-compatible keypairs.
• Sign-In With Solana (SIWS) support, allowing Web2 applications to authenticate users via their Solana wallet signatures.
• Solana Pay integration support.
• Non-custodial wallet infrastructure compatible with any Solana dApp.

This is particularly relevant for Solana consumer apps targeting non-crypto-native users — gaming, social, or DePIN projects — where conventional wallet setup flows (download extension, create wallet, back up seed phrase) represent a meaningful drop-off risk. Web3Auth's Unity and Unreal SDKs make it directly applicable to Solana gaming studios.

Security and Audits

Web3Auth has conducted multiple independent security reviews of its key infrastructure:

• CertiK: Backend and Distributed Key Generation (DKG) implementation audit.
• Aniket Kate (Purdue University): Academic cryptography review of the threshold key scheme.
• Cure53: Application security audit.
• Kudelski Security: Infrastructure and codebase review.

The project maintains a public Trust Center at trust.web3auth.io and holds a legal opinion classifying its solution as non-custodial, confirming that Web3Auth does not legally hold or control users' private keys.

Background and History

Originally operated under the name Torus Labs, Web3Auth was founded in 2019 by Amanda Brandenburgh, Leonard Tan, Mohd Fairuz Razi bin Sharuddin, and Zen Yong. The founding thesis was that seed phrase management is a structural barrier to mainstream crypto adoption — a problem that social-login wallets backed by MPC could solve without sacrificing self-custody.

The company raised $13 million in total funding as an independent B2B infrastructure provider. By the time of its acquisition it served approximately 50 million end users across more than 8,200 decentralized applications, with production integrations at Trust Wallet, Binance, Safe Global, Chess.com, and Ubisoft.

In June 2025, Consensys — the Ethereum infrastructure company behind MetaMask — acquired Web3Auth. Financial terms were not disclosed. The acquisition addressed a documented problem in MetaMask's user base: Consensys data showed that 35% of MetaMask users do not back up their seed phrases, leaving them exposed to permanent fund loss. Web3Auth's MPC infrastructure is being integrated into MetaMask as MetaMask Embedded Wallets, bringing social login and device-based wallet recovery to MetaMask's ecosystem. Official documentation has migrated to docs.metamask.io/embedded-wallets, but the developer SDK and Solana-compatible infrastructure remain available through the new product brand.

Fit Within the Solana Ecosystem

Web3Auth targets one of Solana's clearest consumer-adoption friction points: wallet creation. Solana's performance advantages are well established, but onboarding flows that require users to install browser extensions and secure seed phrases remain a barrier for applications trying to reach general audiences.

By generating Solana keypairs through MPC-backed social logins, Web3Auth allows Solana developers to offer sign-in experiences indistinguishable from mainstream apps, while the user retains genuine ownership of their wallet. The Consensys acquisition expands the organizational resources behind this infrastructure — though it also shifts the product roadmap toward MetaMask's broader ecosystem priorities. Solana developers evaluating the platform should track updates under the MetaMask Embedded Wallets brand for the current roadmap and feature availability.