Cresta enables AI for legacy telephony

This move turns Cresta from a cloud overlay vendor into a bridge for the part of the contact center market that still cannot swap out core phone systems. In practice, that means enterprises with desk phones, TDM trunks, or on premises PBX setups can feed live call audio into Cresta, get real time coaching or AI handling, and keep their existing telephony stack in place while buying AI now instead of waiting for a full migration.1 2 3 4

• Cresta already sells by integrating into existing contact center systems rather than replacing them. Its product connects to telephony platforms like Genesys, Five9, NICE, Avaya, Cisco, and Amazon Connect, then shows agents a live side panel with prompts, knowledge, and summaries during the call.1 2 4
• This matters because legacy infrastructure is still common and hard to unwind. Cresta described hardphone integration as a way to bring cloud style AI to on premises centers without a broad migration, while Genesys and Five9 both frame moving off old on premises stacks as a major project with cost and complexity.1 3 5 6
• The competitive angle is that AI native specialists like Cresta and Observe.AI can now reach accounts that used to default to incumbents just because the phone system was entrenched. That widens the wedge for overlay software before a buyer commits to a full platform replacement, and it creates a path to upsell AI agents and analytics later.1 4 7

The next step is a broader hybrid market where enterprises buy AI in front of migration, not after it. Vendors that can capture audio, return guidance in milliseconds, and work across both cloud and on premises systems will get into more Fortune 500 accounts earlier, then use that foothold to become the operating layer for human and AI agents.1 4 8