Chip vs Chip

ESP32-C3 vs EFR32MG24

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Side-by-side comparison of ESP32-C3 and EFR32MG24 BLE SoCs.

    
    

      
    

  


  
  
  

    
      

        A
        
ESP32-C3

      

      

    
    
      

        B
        
EFR32MG24

      

      

    
  

  

  
  

  






  
  

    
Overview


The ESP32-C3 is Espressif's cost leader for Wi-Fi+BLE IoT development—a single-core RISC-V SoC at $1.50 with a huge open-source ecosystem. Silicon Laboratories' EFR32MG24 is a premium multiprotocol SoC in a different class: it supports BLE 5.3, Thread, Zigbee, and Matter simultaneously through its 802.15.4 + BLE radio, integrates a hardware AI/ML accelerator (MVP—Matrix Vector Processor), implements Secure Vault High (the strongest security tier in the SiLabs portfolio), and fits on an ARM Cortex-M33 running at 78 MHz with up to 1536 KB flash and 256 KB RAM. The MG24 is Silicon Labs' answer to the Matter era for smart home products.




Key Differences


    

  • Protocol coverage: EFR32MG24 supports BLE 5.3 + Thread + Zigbee + Matter (802.15.4 + BLE simultaneous); ESP32-C3 supports Wi-Fi 4 + BLE 5.0 only.
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  • Wi-Fi: ESP32-C3 includes Wi-Fi 4; EFR32MG24 has no Wi-Fi radio.
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  • AI/ML: EFR32MG24 integrates a hardware Matrix Vector Processor (MVP) for neural network inference acceleration; ESP32-C3 has no vector or ML acceleration hardware.
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  • Security: EFR32MG24 implements Secure Vault High—the most advanced tier, with PUF-based key storage, anti-tamper hardware, secure debug, and supply chain attack resistance; ESP32-C3 has basic secure boot and flash encryption.
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  • Memory: EFR32MG24 offers up to 1536 KB flash and 256 KB RAM—much larger than ESP32-C3's 4 MB external flash and 400 KB SRAM arrangement, though the C3's SRAM advantage depends on module configuration.
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  • Power: EFR32MG24 achieves ~1.2 µA deep sleep and optimized BLE+Thread concurrent operation; ESP32-C3 draws more in Wi-Fi standby modes.
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  • Cost: EFR32MG24 is $3.50–6.00, reflecting premium multiprotocol and AI features; ESP32-C3 is $1.50.
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  • Matter readiness: EFR32MG24 is Matter-over-Thread certified; ESP32-C3 supports Matter-over-Wi-Fi only.
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Use Cases


Choose ESP32-C3 when:
- Wi-Fi+BLE at the lowest possible cost is the primary goal.
- Open-source ecosystem and rapid prototyping are priorities.
- Thread/Zigbee/Matter-over-Thread are not required.
- On-device AI inference is not a feature requirement.


Choose EFR32MG24 when:
- Thread, Zigbee, and Matter-over-Thread are required for smart home certification.
- On-device neural network inference (e.g., keyword spotting, gesture recognition) is needed.
- The highest security tier (Secure Vault High) is required for the application.
- A premium, high-flash-density SoC for complex multiprotocol applications is warranted.




Verdict


The EFR32MG24 and ESP32-C3 are at very different price and capability points. The ESP32-C3 is the right choice for low-cost Wi-Fi+BLE IoT nodes where protocol breadth beyond those two radios is not needed. The EFR32MG24 is the right choice for the most demanding smart home and industrial applications where Matter-over-Thread certification, on-chip AI inference, and the highest security tier all coexist. The cost delta (roughly 3–4×) is justified when the full MG24 feature set is required; otherwise, for simpler applications, both cheaper SiLabs parts (BG22, BG24) and the ESP32-C6 offer better value.

  

  

  
  

  
  

    




  
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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.