[Wallets](https://revain.org/wallets/) › Tangem

# Tangem: keys, security, fees and reviews

## In short

- **Key control**: Non-custodial: private keys are generated, stored and used for signing inside the card; Tangem has no way to extract them.
- **Fees**: Device price: 2-card set $54.90, 3-card set $69.90, Ring with 2 cards $160.00, during a promotion ending 2 November (as of 31 October 2026).
- **Risks and caveats**: Losing all backup cards without a recovery phrase means losing access; Tangem cannot recover keys.
- **Checked**: 31 October 2026

## Key facts

- **Official site**: [tangem.com](https://tangem.com/)

Key facts checked on 31 October 2026 against official sources.

## What is Tangem

Tangem is a Swiss hardware wallet in the form of NFC cards (and a ring) that work with the Tangem mobile app; there is no screen, cable or battery. It is made by Tangem AG in Zug, founded in 2017. Keys are created inside a secure element on each card, and a set of 2-3 cards backs up the same wallet instead of a mandatory seed phrase.

## Who holds the keys

| Parameter | Details |
|---|---|
| Key control | Non-custodial: private keys are generated, stored and used for signing inside the card; Tangem has no way to extract them. |
| Recovery | Backup is made by linking 2-3 cards holding the same wallet; a seed phrase is optional. |
| Seed phrase | Optional; it exists only if the user generates it, and then allows restoring access in other compatible wallets. |
| Custodian | Tangem's systems never receive or store private keys, recovery phrases or passwords. |

## Features and supported networks

| Parameter | Details |
|---|---|
| Platforms | NFC cards and a ring used with the Tangem app for iOS and Android. |
| Supported networks | More than 90 blockchains and 14,100+ tokens. |
| Secure element | EAL6+ certified chip developed with Samsung Semiconductors. |
| Connectivity | NFC only; no batteries, cables or screen. |
| Swaps | Buy, sell, swap and stake through integrated third-party providers in the app. |
| Other products | Tangem Pay, a non-custodial Visa card built into the wallet (2025). |

## Security and audits

- The secure element is certified to Common Criteria EAL6+, according to Tangem; the chip model and certificate number are not named on Tangem's pages.
- Kudelski Security audited the card firmware (v1.28) in August 2018; Riscure evaluated the wallet firmware in 2023 (only a summary is published); Cure53 audited the Android and iOS SDKs in Q4 2025 and found no Critical or High issues.
- App and SDK code is public on GitHub under a proprietary licence that Tangem states is not an open-source licence.
- On 27 December 2024 Tangem released an app fix for a bug in app logs affecting users who activated with a seed phrase and contacted support in-app within seven days of activation.

## Fees

| Parameter | Details |
|---|---|
| Device price | 2-card set $54.90, 3-card set $69.90, Ring with 2 cards $160.00, during a promotion ending 2 November (as of 31 October 2026). |
| Network fees | Blockchain network fees apply; the total cost of a transaction is shown in the app. |

## History

| Date | Event |
|---|---|
| 2017 | Tangem founded in Zug, Switzerland. |
| 2018 | First product, Tangem Note, a single-asset NFC card. |
| 6 August 2018 | Kudelski Security audit of the smartcard firmware. |
| 2022 | Tangem Wallet v1 with a 3-card backup system. |
| 2023 | Tangem Wallet v2 with multi-asset support and optional seed phrase backup. |
| 2024 | Tangem Ring launched. |
| 2025 | Tangem Pay non-custodial Visa card launched. |

## Risks and caveats

- Losing all backup cards without a recovery phrase means losing access; Tangem cannot recover keys.
- Tangem cannot reverse a submitted transaction.
- Swaps, on/off-ramps, staking and yield are third-party services with their own terms, KYC and pricing.

## About the developer

- **Legal entity**: Tangem AG, Reg. No CHE-390.112.525.
- **Headquarters**: Baarerstrasse 10, 6300 Zug, Switzerland.
- **Founded**: 2017
- **Leadership**: Andrey Lazutkin (CTO); Andrey Kurennykh (board member and co-founder); Konstantin Shulga listed first among leadership.
- **Licence / registration**: Not regulated as a financial services provider or exchange; crypto transaction services come from third parties.

## Official links

- Website: [tangem.com/en](https://tangem.com/en/)
- Security: [tangem.com/en/security](https://tangem.com/en/security/)
- Docs: [tangem.com/en/security/audits](https://tangem.com/en/security/audits/)
- Source code: [github.com/tangem](https://github.com/tangem)
- Support: [tangem.com/en/help-center](https://tangem.com/en/help-center/)
- Blog: [tangem.com/en/blog](https://tangem.com/en/blog/)

## Questions and answers

**Is Tangem self-custodial?**

Yes. Keys are generated and kept inside the card's secure element; Tangem never receives private keys or recovery phrases.

**Does Tangem need a seed phrase?**

No. Two or three linked cards hold the same wallet as backup; a seed phrase is optional.

**Is Tangem open source or audited?**

Its app code is public but under a proprietary licence, not open source. Kudelski Security (2018), Riscure (2023) and Cure53 (Q4 2025) audited it.

**How much does Tangem cost?**

$54.90 for 2 cards and $69.90 for 3 cards during a promotion (as of 31 October 2026); network fees are extra.

**Who makes Tangem?**

Tangem AG, a company in Zug, Switzerland, founded in 2017.

## Sources

- [Tangem — Home](https://tangem.com/en/)
- [Tangem — Security](https://tangem.com/en/security/)
- [Tangem — Security audits](https://tangem.com/en/security/audits/)
- [Tangem — Security changelog](https://tangem.com/en/security/changelog/)
- [Tangem — Company](https://tangem.com/en/company/)
- [Tangem — Pricing](https://tangem.com/en/pricing/)
- [Tangem — Terms of Service (PDF)](https://tangem.com/docs/en/terms-of-service.pdf)
- [Kudelski Security — Audit of Tangem's smartcard wallet code (2018 summary)](https://tangem.com/docs/en/kudelski-audit-2018.pdf)
- [Riscure — Audit of Tangem Wallet firmware (2023 summary)](https://tangem.com/docs/en/riscure-audit-2023.pdf)
- [Cure53 — Summary report: Tangem mobile wallet (Q4 2025)](https://cure53.de/summary-report_tangem-crypto.pdf)
- [GitHub — tangem/tangem-app-ios LICENSE](https://github.com/tangem/tangem-app-ios/blob/master/LICENSE)

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Page updated: 2026-10-31

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Source: https://revain.org/wallets/tangem/