Top 10 Best Contact Center Consulting Services Here are the top 10 most popular contact center consulting providers Services websites. 1 InflowCX inflowcx.com 2 TTEC ttec.com 3 AltSource altsourcesoftware.com 4 Solid8 solid8.io 5 Ascend Technologies teamascend.com 6 LiveOps liveops.com 7 Five9 five9.com 8 Avaya avaya.com 9 CH Consulting chconsultinggroup.com 10 Eventus eventusg.com