Copper might be a bit more popular than NethServer. We know about 1 link to it since March 2021 and only 1 link to NethServer. 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.
Check out Nethserver - https://nethserver.org/. Source: over 2 years ago
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
Zentyal - Linux directory, domain, mail, gateway and infrastructure server for SMBs.
Zoho CRM - Omnichannel CRM for Businesses of all sizes
ClearOS - A very good alternative for Windows Server, for free
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.
pfSense - pfSense is a free and open source firewall and router that also features unified threat management, load balancing, multi WAN, and more
Freshsales CRM - A full-fledged CRM for high-velocity sales teams.