MIFARE Ultralight vs NTAG213 / 215 / 216

Choose MIFARE Ultralight if you need the absolute lowest-cost RFID tag for single-use or limited-reuse applications like event tickets, transport passes, or loyalty stamps. With 48 bytes of user-writable memory from its 64-byte total capacity, it provides sufficient space for a unique identifier, counter, or simple data payload. It operates at 13.56 MHz using ISO/IEC 14443-A protocol with cascade level 2 and is NFC Forum Type 2 compatible, ensuring smartphone readability. Security is minimal: a 7-byte UID per ISO/IEC 14443-3, a 32-bit one-time-programmable area, and field-programmable read-only locking per page, but no encryption or password protection. The 16-bit lock bytes and 32-bit OTP area allow permanent write-protection of data once programmed. This makes it ideal for disposable credentials where cost per unit is the primary concern and data tampering risks are acceptable or mitigated through backend validation. Choose NTAG213, NTAG215, or NTAG216 if you require significantly more memory, reusable NFC tags, or meaningful security features. NTAG213 provides 144 bytes of user memory, NTAG215 offers 504 bytes, and NTAG216 delivers 888 bytes, all operating at 13.56 MHz under ISO/IEC 14443 Type A and NFC Forum Type 2 Tag specifications. All three variants include 32-bit password protection to restrict write or read access, ECC-based originality signatures for authenticity verification, field-programmable read-only locking, and a 7-byte unique UID. The password protection and cryptographic signature make these tags suitable for applications requiring tamper resistance or brand protection, such as product authentication, smart posters, consumer electronics pairing, or access cards that store configuration data. The NTAG family costs more per unit than MIFARE Ultralight but justifies the premium through enhanced security and substantially larger storage, making them the standard choice for commercial NFC deployments where tags are reused or contain valuable data.