As stated in another thread...

I'm quite aware of 3CX. I specifically chose Elastix for SMB client over 3CX due to it being open source and unlimited functionality previously. In my eyes, the change to 3CX is nail in the coffin for future editions of the Elastix brand and features / capability for the unlimited functionality. I understand this is business, but in a true open source environment, there's always options. We will continue with our clients on the current Elastix 2.4 and 2.5 branch; however, we have no plans to go to 3CX. It's nothing personal. If I wanted a commercial offering, 3CX would not be a choice. There's Digium, even Asterisk.org, Askozia, and general FreePBX. There are options, and I'm sure more will be coming soon or are available.

I just went to PIAF web site and the same thing happened - 3CX bundled in. Did 3CX just sweep the two obvious Open Source option for VoIP / Telephony solution?

WTH, Where have I been?!!!!!!!!!!

Thank you sir! From old Spice!

When it came to the open source GUI, Elastix is among the best - telephony wise, the best. The draw for Elastix was their very aesthetically built user interface. There is nothing close; FreePBX is not close. Under the hood they can be driven by same engine, but Elastix was the best in terms of cohesive and beautiful interface. Open source has great tools and backends, but 90+ or more percent lack the real draw for first time adopters - gorgeous / aesthetic / easy GUI.

Well, that didn't last long for xivo.io