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3.  Magic Links 

Authentication

# Magic Links

Magic links are a passwordless sign-in method that emails the user a single-use, time-limited URL — clicking it logs them in without needing a password.

Last reviewed 3 months ago

Key points

-   Common in consumer apps and SaaS onboarding (Slack, Notion, Medium)
-   Eliminates password reset friction
-   Security depends entirely on the user's email account
-   Vulnerable to phishing and email-account takeover
-   Weaker than passkeys; useful as a stepping-stone or fallback

## What it is

Magic links replace the password with a single-use, time-limited URL emailed to the user. The user clicks, the app validates the token, and the session begins.

## How it works

1.  User enters email
2.  App generates a token, stores it server-side (or signs it), emails the URL
3.  User clicks the link within the validity window (typically 5–15 minutes)
4.  App validates and establishes the session

## When buyers care

-   B2B SaaS onboarding flows where password friction kills conversion
-   Low-frequency consumer apps where users would otherwise forget passwords
-   As a recovery / fallback method for passkey flows

## Common misconceptions

-   **Magic links are not 'more secure than passwords' by default.** They shift the trust to the user's email account.
-   **Magic links are not phishing-resistant.** Passkeys are. If the threat model includes phishing, prefer passkeys.

## FAQ

### Should I use magic links or passkeys?

Passkeys are the long-term answer. Magic links remain useful for low-stakes flows, account recovery, and contexts where passkey UX isn't yet feasible (some embedded webviews, very low-tech audiences).

### What link lifetime is appropriate?

5–15 minutes is the sweet spot. Long-lived links sitting in inboxes are an account-takeover liability.

IDSync provides educational buyer guidance based on publicly available information, editorial review, and user-submitted data. Vendor information should be verified before purchase. [Who we are, our methodology & disclosure policy](/about).

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