Privacy-preserving signup kit

Sign up to MetaMask without giving up your real identity

MetaMask scores poorly. Treat this signup as untrusted: alias every primitive you can.

High risk · raw score 39

Suggested per-service alias

Paste this local-part into the relay you choose. The deterministic tag means a future rescan and a different device produce the same suggestion, so a single alias maps to this service forever.

metamask.85oils@your-relay-domain

Email alias

Recommended

MetaMask scores poorly. Do not give them your real email — use a forwarding alias you can disable in one click.

Use a forwarding alias you can disable later. The service never sees your real address.

Apple Hide My Email
Native to iCloud+. Generates per-service forwarding aliases. Sign in with Apple uses it automatically.
freemium
Firefox Relay
5 free aliases. Strips trackers. Premium unlocks unlimited and a custom subdomain.
freemium
SimpleLogin
Open-source. Bundled with Proton. Reverse-alias replies and PGP support.
freemium
addy.io
Open-source. Generous free tier. Catch-all on a custom domain on paid plans.
freemium

Phone relay

Recommended

Use a relay number — at this risk level, real phone numbers leak into broker pipelines through this service's partners.

Use a relay number for SMS verification so your real number doesn't end up in a data-broker pipeline.

Google Voice
Free US-only secondary number. Useful for SMS verification but ties to a Google account.
free
MySudo
Multiple personas with isolated numbers, emails, and cards. Strongest separation.
paid
Cloaked
Per-service identities — email, phone, password — generated on demand.
paid

Billing isolation

Recommended

Use a virtual card with a hard cap. Services at this risk level are the ones most likely to make cancellation difficult.

Use a per-merchant virtual card with a hard cap. Cancellation friction stops mattering when you can lock the card.

Privacy.com
US virtual cards with per-merchant locks and spend caps. The single most effective subscription circuit-breaker.
freemium
Revolut disposable virtual cards
EU/UK alternative. Card details rotate after each transaction.
freemium
Apple Card virtual card numbers
If you already have Apple Card. Less granular than Privacy.com but zero friction.
free

Signup checklist

Open the relay you picked from the email section and create the alias metamask.85oils.
If MetaMask requires phone verification, use the relay number from the phone section instead of your real one.
If you're putting a card on file, generate a per-merchant virtual card so you can kill it if cancellation gets sticky.
Use a long, unique password from your password manager. Skip “sign in with Google / Apple / Facebook” unless you trust this service to inherit that account's blast radius.
Save the consent receipt for this signup here so you can prove what you agreed to if the policy changes later.