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AnalysisTelecom identity

Glide Identity’s three-carrier beta: what it does, and what it still has to prove

The startup says its SIM-based login now works across AT&T, T-Mobile and Verizon. Here is what the company claims, what independent reporting confirms, and the questions a bank should ask before a pilot.

By [Editor Name], Identity & Access EditorTechnical review by [Reviewer Name], Technical reviewer
Published 2 min read

The short answer

On August 3, 2026, Glide Identity announced a beta of what it calls carrier-native cryptographic authentication across AT&T, T-Mobile and Verizon. The company says its MagicalAuth product verifies a user through the SIM’s cryptographic link to the network instead of sending an SMS code. No independent security assessment has been published.

Key takeaways

  • Glide says MagicalAuth confirms identity through the SIM’s link to the carrier network, with no code to type.
  • The beta covers the three largest US carriers; the company says it falls back to passkeys or email links when SIM authentication isn’t available.
  • Aduna announced carrier number verification across the same three carriers a month earlier. The two approaches are not the same thing.
  • Open questions: NIST classification, real-world coverage, pricing and independent testing.

What Glide announced

On August 3, 2026, Glide Identity announced a beta of what it calls “carrier-native cryptographic authentication” across AT&T, T-Mobile and Verizon. The release includes a quote from a Verizon Business executive.[1] Biometric Update reported the launch four days later.[3]

How the company says it works

According to Glide, its MagicalAuth product “confirms identity using the SIM’s cryptographic link to the network”.[2] When an app asks a user to log in, check out or recover an account, the check runs through the carrier in the background and, the company says, completes in under a second with no code to type. Glide says it switches to passkeys or email links when a device or operating system doesn’t support SIM authentication, and it offers SDKs for iOS, Android and the web plus a REST API.[2]

The company also sells SuperPasskey, which it describes as passkeys combined with SIM verification.

How it differs from number verification

A month before Glide’s beta, Aduna, a network-API joint venture, announced number verification with the same three carriers.[4] Number verification answers a narrow question: does this request come from the SIM registered to this phone number? Glide describes its approach as cryptographic authentication anchored in the SIM, a stronger claim. Sigil has not tested either, and buyers should ask vendors to show exactly what is signed, by what key, and what the relying party can verify.

The company in context

  • Funding: a Series A of more than $20 million in October 2025, led by Crosspoint Capital Partners.[5]
  • Recognition: one of 10 finalists in the RSAC 2026 Innovation Sandbox contest.[6] Geordie AI won.
  • Standards: a Sponsor-level member of the FIDO Alliance[7] and a listed GSMA Open Gateway partner.

What it still has to prove

  • Classification: how SIM-based cryptographic authentication fits NIST SP 800-63B-4, which restricts SMS codes. Our sources don’t address it.
  • Coverage: which devices, operating systems and plans work in the beta, and how often the fallback triggers.
  • Independent testing: we found no published third-party security assessment.
  • Commercials: pricing isn’t public, and the product depends on carrier agreements.
  • SIM swaps and eSIM transfers: the company positions the product against SIM-swap fraud. How it behaves when a number moves to a new SIM hasn’t been independently documented.

What a bank should ask before a pilot

  1. What exactly is verified, and can we validate the result cryptographically on our side?
  2. What share of our mobile customers would be covered today, by carrier and operating system?
  3. What happens on a recent SIM change or eSIM transfer?
  4. How is the method documented against NIST 800-63B-4 for our auditors?
  5. What data does the carrier and the vendor see, and where is it processed?

Frequently asked questions

Is Glide Identity the same as number verification?

Not as the company describes it. Number verification confirms a request comes from the SIM tied to a phone number. Glide describes its approach as cryptographic authentication anchored in the SIM. Sigil has not independently tested either.

Does it replace passkeys?

No. Glide’s SuperPasskey product combines passkeys with SIM verification, and the company says MagicalAuth falls back to passkeys when SIM authentication isn’t available.

Was Glide the RSAC 2026 Innovation Sandbox winner?

No. It was one of 10 finalists. Geordie AI won.

Sources

  1. Business Wire. Glide.id beta launches first carrier-native cryptographic authentication across AT&T, T-Mobile and Verizon, Aug 3, 2026.
  2. Glide Identity. MagicalAuth product page.
  3. Biometric Update. Glide brings SIM-based authentication to all major US carriers, Aug 7, 2026.
  4. ID Tech. Aduna and major U.S. carriers push network-based authentication as SMS code alternative.
  5. Mobile ID World. Glide Identity raises $20M Series A to build AI-era authentication platform.
  6. Business Wire. Glide Identity selected as Top 10 finalist for RSAC 2026 Conference Innovation Sandbox contest, Feb 10, 2026.
  7. FIDO Alliance. FIDO Alliance members.
Changelog
  • Published.
[Editor Name]

Identity & Access Editor. [Replace with a real bio: prior roles, years covering authentication and fraud, notable reporting.]

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