Based on our record, esp32 should be more popular than Copper. It has been mentiond 3 times since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
I've seen Copper CRM work quite well for contractors (assuming that your team is using or open to using Google Workspace - if you're not using Google Workspace, I'd probably ask why not? But then recommend you to use Pipedrive if you're not willing to switch to Google Workspace). Source: over 1 year ago
Esp32.net has a bunch of additional references, projects, and places to gather information. Source: almost 3 years ago
Closest thing is the ESP32 from Espressif Systems See ESP32 link for details. Since you specifically asked for open source, so some tinkering and compile is required. Source: about 3 years ago
There's also many more dev boards, chips and modules listed here, though they may not necessarily have platformio IDs. Source: about 3 years ago
Zoho CRM - Omnichannel CRM for Businesses of all sizes
Intel NUC boards - Four-by-four inch Intel NUC boards come with a soldered-on processor.
Pipedrive - Sales pipeline software that gets you organized. Helps you focus on the right deals, so easy to use that salespeople just love it. Great for small teams.
Intel NUC - Intel NUCs are available as Kits(Barebones), Boards(Mainbaord only) and as perconfigured Mini-PCs.
Freshsales CRM - A full-fledged CRM for high-velocity sales teams.
ESPRESSObin - Electronics, Single Board Computer, and x86