Web3Auth (MetaMask Embedded Wallets)
Embedded wallet SDK that lets apps create non-custodial wallets from email, SMS, social or passkey logins.
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MetaMask Embedded Wallets key facts
| Category | Developer infrastructure |
|---|---|
| Chains | EVM chains, Solana and Bitcoin |
| Platforms | Web, iOS, Android, SDK |
| Pricing | Base free; Growth $69/month; Scale $399/month; Enterprise custom. Extra monthly active wallets $0.050 to $0.040 each |
| Free plan | Base plan: 1,000 monthly active wallets free, then $0.050 per additional wallet |
| Company | Consensys Software Inc. (acquired Web3Auth) |
| Chains | EVM networks, Solana, Bitcoin and more (chain-agnostic) |
| Open source | Yes: web SDK public at github.com/Web3Auth/web3auth-web |
| US availability | Available: terms restrict only sanctioned jurisdictions |
| Fees | Per monthly active wallet above plan quota: $0.050 (Base), $0.045 (Growth), $0.040 (Scale) |
What is MetaMask Embedded Wallets?
MetaMask Embedded Wallets, formerly Web3Auth, is a wallet SDK that creates wallets for users who sign in with email, SMS, social accounts or an external wallet, with no seed phrase. Web3Auth was acquired by Consensys, the company behind MetaMask. The free Base plan covers 1,000 monthly active wallets, then $0.050 per extra wallet.
How MetaMask Embedded Wallets works
Embedded Wallets never store a full private key in one place.
The key is split into shares with a threshold of 2 out of n: in the typical 2-of-3 setup, one share comes from the OAuth login and is split further across the Embedded Wallets Network nodes, one sits on the user's device, and one is a backup factor such as a password, a downloaded file or a second device. Any two shares recover the key, and the integrating app can raise the threshold.
The network nodes use a t-of-n model, so an attacker has to compromise t nodes, and the service goes down only if n minus t fail, for example 2 nodes in a 3-of-5 setup. The SDKs on the Base, Growth and Scale plans use Shamir Secret Sharing, which reconstructs the key to sign. The MPC Core Kit SDK uses threshold signatures where the key is never rebuilt, and it is available only on the Enterprise plan.
How to start with MetaMask Embedded Wallets
- Sign up at the Embedded Wallets dashboard, where the base plan is free, create a project, and pick an SDK: React, Vue, JavaScript, Node.js, Android, iOS, React Native, Flutter, Unity or Unreal Engine.
- Base covers email, SMS, wallet and social logins with default providers, plus MFA.
- Passkeys, third-party JWT login such as Firebase or Auth0, and a whitelabeled login UI start on Growth.
- Sessions last 1 day on Base and 1 to 30 days on Growth and Scale.
MetaMask Embedded Wallets fees and limits
- Base is free for 1,000 of them, then $0.050 each.
- Growth costs $69 a month with 3,000 included and $0.045 per extra; Scale costs $399 a month with 10,000 included and $0.040 per extra.
A monthly active wallet is any user who logs in or holds an active session at least once in a calendar month. Enterprise is custom with volume discounts. SMS one-time passwords are free for the first 100 messages, then billed at market rates.
Risks to know before using MetaMask Embedded Wallets
- On the standard SDKs the key is reconstructed to sign, so the security of the user's device matters at that moment; signing without ever assembling the key is reserved for Enterprise.
- Under a 2-of-3 threshold, the login share alone cannot recover a wallet, so a user who loses both the device share and the backup factor loses access.
- Web3Auth was acquired by Consensys, and its docs now live under MetaMask Embedded Wallets.
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Where MetaMask Embedded Wallets ranks on DappAtlas
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MetaMask Embedded Wallets pros and cons
- Free Base plan includes 1,000 monthly active wallets
- Chain-agnostic: EVM networks, Solana and Bitcoin
- Web SDK source is public on GitHub
- Whitelabeled login UI starts at the $69/month Growth plan
- MPC TSS for web and mobile is Enterprise-only
- Farcaster login is deprecated in the current SDK
MetaMask Embedded Wallets FAQ
What is MetaMask Embedded Wallets?
MetaMask Embedded Wallets, formerly Web3Auth, is a wallet SDK that creates wallets for users who sign in with email, SMS, social accounts or an external wallet, with no seed phrase. Web3Auth was acquired by Consensys, the company behind MetaMask. The free Base plan covers 1,000 monthly active wallets, then $0.050 per extra wallet.
Which chains does MetaMask Embedded Wallets support?
EVM chains, Solana and Bitcoin.
How much does MetaMask Embedded Wallets cost?
Per monthly active wallet above plan quota: $0.050 (Base), $0.045 (Growth), $0.040 (Scale), according to MetaMask Embedded Wallets’s own page (checked Oct 1, 2026). Free plan: Base plan: 1,000 monthly active wallets free, then $0.050 per additional wallet.
Is MetaMask Embedded Wallets available in the US?
Available: terms restrict only sanctioned jurisdictions, according to MetaMask Embedded Wallets’s own page (checked Sep 26, 2026).
Does MetaMask Embedded Wallets hold my funds?
No. MetaMask Embedded Wallets is non-custodial: you keep your funds in your own wallet and sign each transaction.
Sources
How this page works
Sources: MetaMask Embedded Wallets: official site, Web3Auth: Pricing, Web3Auth: GitHub web3auth-web. Data as of Oct 1, 2026.
Not affiliated with any project listed. Educational content, not financial advice.