Guides / ESP32-S31 vs ESP32-S3 · Data from 24 October 2026
ESP32-S31 vs ESP32-S3: price and availability
Espressif's ESP32-S31 got a lot of attention this week with ESP-Mosaico, a modular dev kit built around it. If you are choosing a chip for a board you will build soon, the practical question is whether you can buy it in the quantity you need. We checked on 24 October 2026.
Short answer
- On 24 October 2026 we found no ESP32-S31 chip or module at JLCPCB/LCSC, DigiKey or Mouser. Searches for ESP32-S31 and ESP32-S31-WROOM-3 returned only ESP32-S3 parts.
- Espressif says the chip has been in mass production since 27 July 2026, sold through its official AliExpress store. Its datasheet is still marked preliminary.
- The ESP32-S3 is in stock at all three distributors, from about $1.85 for the bare chip to $3.66 for a WROOM-1 module at 100 pieces.
What the ESP32-S31 is
Espressif announced mass production of the ESP32-S31 on 27 July 2026. According to CNX Software, the chip has a 320 MHz RISC-V high-performance core with FPU and SIMD plus a low-power RISC-V core, 512 KB of SRAM, Wi-Fi 6, Bluetooth 5.4 (LE and Classic) and an 802.15.4 radio for Thread, Zigbee and Matter. The datasheet is a pre-release marked preliminary, so pinouts and electrical figures can still change.
The ESP32-S3, for comparison, has two Xtensa LX7 cores at 240 MHz, Wi-Fi 4 and Bluetooth LE 5, and has been in production for years with a final datasheet, many modules and wide library support.
ESP-Mosaico
ESP-Mosaico is a modular development platform built on an ESP32-S31NRV16, with a 2.16-inch 480 × 480 touch display, 16 MB PSRAM, NAND and NOR flash, an IMU, magnetometers, audio and a small battery, plus expansion modules. Espressif pairs it with ESP-Claw, which lets you describe a prototype in plain language instead of setting up a development environment. CNX Software lists the complete kit with the camera and interaction modules at $59 on the Mosaico store, plus $15 for an optional battery module, and notes that earlier units sold on Taobao and AliExpress at higher prices.
A dev kit is a good way to try the chip. It does not tell you whether you can get 500 chips for a production run.
ESP32-S3 prices on 24 October 2026
Unit price at 100 pieces, stock in brackets.
| Part | What it is | JLCPCB / LCSC | DigiKey | Mouser |
|---|---|---|---|---|
ESP32-S3 | chip, no flash or PSRAM | $2.0686 (129) | $1.85 (510) | $1.85 (14) |
ESP32-S3R8 | chip, 8 MB PSRAM | $2.2846 (11,262) | $2.51, 0 stock | $2.51, 0 stock |
ESP32-S3FN8 | chip, 8 MB flash | $2.6168 (4,609) | $3.137 (4,044) | $3.14 (1,448) |
ESP32-S3-WROOM-1-N8R8 | module, 8 MB flash + 8 MB PSRAM | $3.6625 (5,417) | $4.7741, 0 stock | $4.73 (2,199) |
ESP32-S3-WROOM-1-N16R8 | module, 16 MB flash + 8 MB PSRAM | $3.7492 (27,681) | $5.108, 0 stock | $5.04 (36,445) |
- The bare ESP32-S3 was cheaper at DigiKey and Mouser than at JLCPCB, but stock was small everywhere: 129, 510 and 14 pieces.
- For the PSRAM and flash variants and the modules, JLCPCB was cheapest, by 9 to 17% on the chips and 23 to 26% on the modules.
- The N16R8 module had the deepest stock (27,681 at JLCPCB and 36,445 at Mouser) and cost only $0.09 more than the N8R8 at JLCPCB.
- Every part here is an extended part at JLCPCB, so assembly adds $3 per order.
Which one to design in
- A product you will build in the next few months: the ESP32-S3. It is in stock, documented and well supported.
- You need Wi-Fi 6, Thread/Matter and Bluetooth Classic on one chip, or the S31's performance: start with a dev kit, track the datasheet revisions, and confirm a supply route for your volume before you commit a board.
- Thread or Matter without the S31: the ESP32-C6, which is stocked at all three distributors; see ESP32 module prices.
Distributor listings for a new chip can appear any week. We will update this page when the ESP32-S31 shows up at JLCPCB, DigiKey or Mouser. Prices and stock are from 24 October 2026.
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About the data
The numbers in this article come from Next Everything, an MCP server we build that lets AI assistants such as Claude, Cursor and Codex check a BOM against the JLCPCB/LCSC catalog and live Mouser and DigiKey prices. If you want to run the same check on your own BOM, the setup guides show how to connect it.
Next Everything is not affiliated with Mouser, DigiKey, JLCPCB or LCSC. Prices are list prices in USD at the time stated and change daily.