Chip vs Chip

ESP32-S3 vs EFR32MG24

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Side-by-side comparison of ESP32-S3 and EFR32MG24 BLE SoCs.

    
    

      
    

  


  
  
  

    
      

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ESP32-S3

      

      

    
    
      

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EFR32MG24

      

      

    
  

  

  
  

  






  
  

    
ESP32-S3 vs EFR32MG24: Edge AI Wi-Fi SoC vs Multi-Protocol Matter Endpoint


The ESP32-S3 and Silicon Labs EFR32MG24 both support Thread/Wi-Fi." data-category="Protocols & Profiles">Matter but through different radio paths and computational profiles. ESP32-S3 combines dual-core compute with Wi-Fi + BLE and on-device AI; EFR32MG24 is Silicon Labs' premium Cortex-M33 chip with multi-protocol support (BLE + Thread + Zigbee), Secure Vault High, and an on-chip ML accelerator targeting Matter-over-Thread endpoints.




Overview


ESP32-S3 is Espressif's dual 240 MHz Xtensa LX7 SoC with Wi-Fi 4, BLE 5.0, 512 KB SRAM, and a vector instruction set for neural network inference — designed for multimedia-rich IoT products.


EFR32MG24 is Silicon Labs' Cortex-M33 multi-protocol SoC (with 78 MHz application core + dedicated radio) supporting BLE 5.3, Thread, Zigbee 3.0, and Matter. Its Secure Vault High provides the highest tier of Silicon Labs' security features (PUF, anti-tamper, secure OTA, full device attestation). A dedicated AI/ML hardware accelerator makes it one of the few microcontrollers combining multi-protocol radio, security, and on-chip inference in a compact package.




Key Differences


    

  • IEEE 802.15.4: EFR32MG24 natively supports Thread and Zigbee 3.0; ESP32-S3 has no 802.15.4 radio.
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  • Wi-Fi: ESP32-S3 includes 802.11n; EFR32MG24 is 802.15.4 + BLE (no Wi-Fi without an external chip).
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  • Security: EFR32MG24 Secure Vault High (highest tier) vs ESP32-S3's secure boot and flash encryption.
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  • AI/ML: Both have hardware ML support — ESP32-S3 via vector extension (SIMD), EFR32MG24 via a dedicated accelerator. EFR32MG24 focuses on lightweight inference at the endpoint; ESP32-S3 handles heavier workloads.
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  • BLE version: EFR32MG24 supports BLE 5.3 (vs ESP32-S3 BLE 5.0).
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  • Matter: EFR32MG24 is a flagship Matter-over-Thread endpoint chip; ESP32-S3 supports Matter over Wi-Fi/BLE.
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  • Power: EFR32MG24 achieves ~1.4 µA in EM2 sleep; ESP32-S3 targets higher compute workloads at higher steady-state power.
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  • Memory: EFR32MG24 has up to 1536 KB Flash and 256 KB RAM on-die; ESP32-S3 has 512 KB SRAM with external flash.
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Use Cases


Choose ESP32-S3 for BLE+Wi-Fi IoT hubs with AI image/voice processing, multimedia smart home devices, and Matter over Wi-Fi or BLE products needing substantial compute.


Choose EFR32MG24 for Matter-over-Thread endpoints (smart plugs, sensors, switches), Zigbee 3.0 devices, secure industrial IoT nodes, and any battery-powered endpoint where Thread mesh connectivity and hardware security certification are requirements.




Verdict


EFR32MG24 is the stronger choice for resource-constrained, battery-powered Matter-over-Thread endpoints where security certification and protocol breadth (BLE + Thread + Zigbee) matter more than raw compute. ESP32-S3 wins for compute-heavy, multimedia, or Wi-Fi-connected devices. An ideal architecture combines both: EFR32MG24 sensor nodes in a Thread mesh network, with an ESP32-S3 acting as the border router and edge inference engine.

  

  

  
  

  
  

    




  
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Our comparisons use verified datasheet specifications to create side-by-side tables. Each comparison includes a verdict explaining when to choose each option based on your project requirements.