NTAG216 vs NTAG 424 DNA

NTAG216 vs NTAG 424 DNA: Maximum NTAG Capacity vs. Maximum NTAG Security

NTAG216 and NTAG 424 DNA are both NXP NFC tags readable by modern smartphones, but they represent a fundamental trade-off: open maximum storage versus secure minimum payload with cryptographic authenticationauthenticationApplicationsIdentity verification of NFC tags/readers via passwords or cryptographyClick to view →.

Overview

NTAG216 is the flagship of the NTAG21x family, providing 888 bytes of usable NDEF memory — the largest in the series — with the same simple password protectionpassword protectionSecurity32-bit access control for memory areas (plaintext transmission)Click to view → as NTAG213 and NTAG215. It stores complex NDEF messages: multi-language records, full vCards, Wi-Fi credentials, configuration blobs. Any NFC phone reads it natively.

NTAG 424 DNA is NXP's security-focused tag, offering 256 bytes in an NFC Forum Type 4 file structure backed by AES-128 and SUN (Secure Unique NFC) messaging. On every tap, the chip generates a cryptographically unique, server-verifiable URL — enabling anti-counterfeiting without any additional hardware infrastructure beyond a smartphone and a backend API.

Key Differences

• Security: NTAG216 — 32-bit password, easily cloned. NTAG 424 DNA — AES-128 SUN, cryptographic tap-by-tap authentication, cloning infeasible.
• Memory: NTAG216 — 888 bytes usable. NTAG 424 DNA — 256 bytes in Type 4 NDEF file. NTAG216 has 3.4× more raw storage.
• Protocol: NTAG216 — NFC ForumNFC ForumFundamentalsIndustry body developing NFC standards, specifications, and certifications since 2004Click to view → Type 2 (flat NDEF). NTAG 424 DNA — NFC Forum Type 4 (ISO 14443ISO 14443Standards & ProtocolsStandard for contactless smart cards at 13.56 MHz (Types A and B)Click to view →-4 with file-level access control).
• Backend requirement: NTAG216 — zero backend needed. NTAG 424 DNA — requires a cloud API to verify SUN CMACs.
• Use case: NTAG216 — rich NDEF data delivery. NTAG 424 DNA — anti-counterfeit authentication and secure NFC interactions.
• Price: NTAG 424 DNA is roughly 3–5× the cost of NTAG216.

Use Cases

Choose NTAG216 when: - The payload exceeds 490 bytes (large vCards, multi-record NDEF, configuration data) - Open, smartphone-readable data delivery is sufficient - No authentication or anti-counterfeiting is needed

Choose NTAG 424 DNA when: - Anti-counterfeit authentication is required (luxury goods, pharma, brand protection) - Each scan must be verifiably unique and non-replayable - 256 bytes is sufficient for the secure payload

Technical Comparison

Verdict

NTAG216 is the right chip for maximum payload capacity without security requirements. NTAG 424 DNA is the right chip when each tap must be cryptographically verified. If a large secure payload is needed, consider MIFARE DESFire EV3 which combines multi-KB secure memory with SUN messaging.