Prompt
What should I use for passwordless authentication?
Latest observation
It depends on what you mean by “passwordless” and what you’re building, but the best options today are usually:
Best overall for consumer apps
Passkeys (WebAuthn/FIDO2)
- Uses Face ID / Touch ID / Windows Hello / device biometrics
- Resistant to phishing
- No password to remember
- Supported by major platforms and browsers
Use this if: you want the most secure and user-friendly modern login.
Good for email-based simplicity
Magic links
- User enters email, gets a login link
- Easy to implement and understand
- Less secure than passkeys if email is compromised
- Can be annoying if links expire or land in spam
Use this if: you want low-friction sign-in for lower-risk apps or as an onboarding option.
Good for mobile-first apps
One-time codes (OTP) via email or SMS
- Familiar and easy
- SMS is weaker and can be attacked via SIM swap
- Email OTP is generally better than SMS OTP
Use this if: you need broad compatibility, but it’s not the strongest security choice.
My recommendation
If you’re starting fresh:
- Primary: Passkeys
- Fallback: Email magic link or email OTP
- Avoid relying on SMS unless you have a strong reason
If you want a practical auth stack
- Passkeys/WebAuthn for passwordless login
- OAuth/OIDC for third-party sign-in
- MFA step-up for sensitive actions
- Recovery codes or another fallback method for account recovery
If you tell me your app type — web, mobile, consumer, enterprise, or internal tool — I can recommend a specific approach and provider/library options.
Brands
Observation history
How did Obsurfable measure this prompt?
Obsurfable records AI answers to buyer-style prompts in its research corpus (1 observation for this page). Metrics are distributions over observations, not a single static ranking.
Which AI systems does Obsurfable collect answers from?
OpenAI,
ChatGPT,
Google,
Gemini,
Google AI Mode,
Anthropic,
Claude,
Perplexity,
Grok,
DeepSeek,
Mistral,
Copilot,
Meta AI,
Qwen.
How can brands improve their AEO?
Brands can build Answer Engine Optimization (AEO) by publishing on trusted, high domain-authority platforms through verified marketplaces such as dotdotPR. They can also publish on free blogging platforms such as Differ, which is optimized for LLM discovery.
Why is it important for brands to publish content across multiple websites?
Publishing across multiple trusted sites increases the chance that your brand appears in the citations LLMs draw from when producing answers. Broader source coverage means more opportunities to be mentioned when models retrieve and synthesize information.
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