ESP32-S3 vs ESP32-C6 vs ESP32-P4: Which One for Your Product?
Most product creators pick the ESP32-S3 by default because it’s familiar, and then six months into development they realize it can’t do what their product actually needs.
The ESP32 lineup has exploded to over nine different variants, but three of them matter most for new product designs right now: the S3, the C6, and the P4.
But each one targets a completely different type of product, and confusing them is one of the most expensive early mistakes you can make.
So I’m going to break down exactly who each chip is for, where each one falls short, and which one you should actually be designing around.
Before getting into those three chips, let me quickly explain why I’m not covering the other ESP32 variants separately.
The original ESP32 still works and still ships in products, but its Xtensa architecture and WiFi 4 are starting to show their age.
The C2 and C3 are solid RISC-V chips for cost-sensitive IoT like smart plugs and basic sensors, but they’re not where the interesting design decisions happen.
The H2 and H4 have no WiFi at all, they’re specialist Thread and Zigbee endpoint chips.
The C5 and C6 are part of the same family, so I’ll cover them together.
So the S3, C6, and P4 are the three that represent completely distinct architectures: the proven all-rounder, the future-proof connected device, and the high-performance compute platform.
The ESP32-S3
The ESP32-S3 is the all-rounder that most product creators default to, and for good reason.
It’s a dual-core processor running at 240 MHz with WiFi 4, Bluetooth Low Energy, and native USB built in, plus up to 45 GPIO pins for connecting sensors and peripherals.
The ecosystem is the biggest advantage here, with more libraries, community support, third-party boards, and module availability than anything else in the ESP32 family.
Native USB means you don’t need a separate converter chip on your board, which reduces your parts count and makes firmware updates in production easier.
Dual-core processing lets you handle WiFi and sensor tasks at the same time without one blocking the other, and pre-certified WROOM and MINI modules make FCC and CE certification much more manageable.
That combination makes the S3 a strong fit for consumer electronics, wearables with displays, audio products, and camera-based devices at moderate resolution.
But the S3 has real limitations you need to know about.
It’s WiFi 4 only, with no WiFi 6, no Thread, and no Zigbee.
It can run Matter natively over WiFi, but if your product requires Thread connectivity, you’ll need a companion chip.
It’s also built on Espressif’s older Xtensa architecture, and everything new they’re releasing uses RISC-V instead, which likely makes the S3 the last major Xtensa chip in the lineup.
Its low-power co-processor is also pretty limited compared to the C6, so if your product needs to handle complex background tasks like continuous sensor polling while the main processor sleeps, you’re going to burn more battery.
So the S3 is your best pick when you need reliable WiFi plus Bluetooth today, moderate processing power, and the most mature ecosystem with the least friction getting to production.
The ESP32-C6
The ESP32-C6 is the chip designed for where smart home and IoT are heading.
It runs a single RISC-V core at 160 MHz paired with a dedicated low-power core at 20 MHz that handles background housekeeping while the main processor sleeps.
But the real headline is the wireless stack: WiFi 6, Bluetooth Low Energy, plus Thread and Zigbee support, all in one chip.
That combination is exactly what the Matter smart home standard was built around, and the C6 and C5 are the only chips in the ESP32 family that deliver all of it natively.
WiFi 6 isn’t just about raw speed for IoT products either.
It includes a feature called Target Wake Time that lets the chip negotiate exact wake-up schedules with your router, which translates to real battery life improvements for products that only transmit data periodically.
WiFi 6 also handles crowded networks much better, so in a home with dozens of connected devices competing for bandwidth, your product won’t choke.
The dedicated low-power core handles sensor polling and BLE advertising while the main core is off, something the S3 simply can’t do.
And because it’s RISC-V, it lines up with Espressif’s long-term direction for toolchains, documentation, and community investment.
The C6 does fall short on raw processing power, since a single core at 160 MHz gives you noticeably less headroom than the S3’s dual-core 240 MHz.
It’s not the chip for display rendering, AI inference, or heavy compute.
The ecosystem is also smaller than the S3’s right now, with fewer libraries, examples, and third-party resources, though it’s catching up fast.
No USB OTG, meaning it can’t act as a USB host or emulate custom USB devices, and no hardware floating point unit either, so keep those in mind if your design depends on them.
Now, if the C6’s processing speed feels limiting, that’s exactly where the ESP32-C5 comes in.
The C5 shares the same wireless stack, WiFi 6, Bluetooth, Thread, and Zigbee, but bumps the main core up to 240 MHz and the low-power core up to 48 MHz.
It also adds dual-band WiFi 6 with 5 GHz support, which helps in environments where 2.4 GHz is congested.
The C5 is in mass production with modules available today, so if you need the C6’s wireless architecture but with more processing headroom or 5 GHz, the C5 closes both of those gaps.
The C6 and C5 are ideal for IoT and smart home products designed around Matter, battery-powered sensors, environmental monitors, and anything where wireless protocol flexibility and power efficiency matter more than raw compute.
The ESP32-P4
The ESP32-P4 is a completely different animal.
It’s the most powerful chip in the ESP32 family, running a dual-core RISC-V processor at 400 MHz with a separate low-power core at 40 MHz.
It’s got 768 KB of on-chip SRAM plus support for up to 32 MB of in-package PSRAM, which is basically extra memory your chip can access when it needs to handle bigger workloads like video or graphics.
It also has high-speed interfaces for connecting cameras and displays directly, plus hardware video encoding and decoding built right in.
But here’s the critical thing: the P4 has no WiFi, no Bluetooth, and no wireless radio of any kind.
This is not a “better ESP32,” it’s a compute module that deliberately traded wireless for processing power, memory, and multimedia features.
So if your product needs wireless connectivity, and almost every product does, you’re designing a two-chip system with the P4 handling the compute and a companion chip like the C6 handling the wireless.
That means two chips on your board, two firmware images to maintain, and a more complex design overall.
The companion chip approach does have one upside though: you can upgrade your wireless capability independently, like swapping a C6 for a C5 to add 5 GHz, without touching the P4 side of your design.
For the right product, the P4 opens doors that no other ESP32 can.
Products with rich touchscreen interfaces, camera-based detection, video streaming, or on-device AI were previously out of reach without jumping to a Linux single-board computer like a Raspberry Pi.
The P4 gives you that kind of processing power with microcontroller-level power consumption and boot times.
If you don’t need a display, a camera, or heavy compute, the P4 is overkill and over-cost for your application.
Also keep in mind that Arduino support for the P4 is still in early beta, so Espressif’s own ESP-IDF framework is really the only mature option for development right now.
The P4 is best suited for things like touchscreen control panels, smart thermostats with full-color UIs, barcode scanners, visual inspection tools, and edge AI products that need to process data locally.
Production Path Considerations
One of the biggest reasons product creators choose the ESP32 family is the clean scaling path from prototype to production: start on a dev kit, move to a pre-certified module, then transition to the bare chip when volumes justify it.
But that path looks very different across these three chips.
The S3 has the most complete ecosystem with tons of dev kits from Espressif and third parties, multiple pre-certified WROOM and MINI modules available on major distributors, and a well-documented bare-chip option for high-volume custom designs.
The C6 follows the same three-tier path, and the C6 WROOM modules are actually pin-compatible with the original ESP32 WROOM footprint, which makes hardware migration surprisingly easy if you’ve already designed a board around that module.
The P4 is where things get complicated.
Dev kits exist but the selection is still limited, and there are currently no official Espressif pre-certified modules for the P4.
Because the P4 has no radio, it doesn’t need wireless certification on its own.
But your product still needs wireless, so your production board ends up being a P4 bare chip plus a separate pre-certified C6 module on a custom PCB that connects the two.
With the S3 or C6, you can get to production by soldering a pre-certified module onto a relatively simple carrier board and inheriting most of the wireless certifications.
With the P4, you’re designing a multi-chip board from the start, and that’s a meaningfully higher bar for complexity and risk.
Making the Decision
Here’s how to make the decision quickly.
If you need WiFi plus Bluetooth and want the biggest, most mature ecosystem behind you, go with the S3.
For Matter, Thread, or any product where future wireless standards matter most, the C6 or C5 is the clear choice.
If your product needs a rich display, a camera, or serious compute power, the P4 paired with a companion wireless chip is the path to take.
For products where battery life is the absolute top priority, the C6’s low-power core and WiFi 6 power management give it the edge.
And if your product roadmap spans five or more years, lean toward RISC-V with the C6 or P4, since the S3’s Xtensa architecture is legacy even though Espressify still commits to long production support.
One edge case worth knowing: if you need Bluetooth Classic, not just BLE, none of these three chips support it, and the original ESP32 is still the only option in the family that does.
Common Mistakes to Avoid
The most common mistake I see is picking the S3 by default because it’s familiar, then realizing months later that the product actually needs Thread or Matter support, or a high-resolution display, features the S3 doesn’t have.
I’ve seen this happen through my design reviews more times than I can count, and it almost always means either bolting on a second chip or starting the hardware design over.
The second most common mistake is picking the P4 because the specs look impressive, without understanding that “no wireless” means a fundamentally more complex product architecture.
The fix is simple: define your wireless requirements and your processing requirements separately before you ever pick a chip.
If no single chip covers both, you’re looking at a multi-chip design, and it’s a lot better to know that going in than to discover it halfway through development.
