Wink AI is a real-time sales assistant built for one job: helping reps make the next sale while the customer is still on the phone. It listens to the call, knows what the customer bought before, and puts one in-stock product from your catalog on the rep's screen, with a line they can say out loud. Cresta is a broad customer-experience platform for large contact centers, spanning AI agents, live guidance, analytics and QA across voice and digital channels.

If your goal is more revenue per phone call, here is how the two compare. This page is as of October 2026, and everything it says about Cresta comes from Cresta's own website.

The short version

Built for selling. Cresta calls itself "the AI operating system for customer experience." Wink is built only for sales calls, and every part of it is tuned for the second sale.
Suggestions you can sell right now. Cresta's retail page says its assistant can suggest products or offers based on customer context. Wink's suggestions come straight from your live catalog: the item is in stock, in the right size and at a sensible price before the rep ever sees it.
Purchase history drives the pitch. Wink loads the customer's past orders when the call starts, so a pendant bought on Tuesday becomes the matching earrings on Friday.
One suggestion, not a wall of prompts. Wink shows the single best item with a reason the rep can say, and stays quiet when nothing fits.
Tuned on what sells. We track whether each suggestion was pitched and whether the customer bought, and tune Wink on those outcomes.
People stay on the call. Cresta also sells an autonomous AI agent. Wink keeps a person on every call and makes that person better.

Why phone sales teams choose Wink

It knows your catalog, live

Most of the value of an upsell is gone if the item is sold out, the wrong size or three times the customer's budget. Wink connects to your product catalog and checks stock, size and price before it suggests anything. Every product shown is a real item the rep can add to the order. Reps can also type a question mid-call, like "matching necklace under $150?", and get products they can sell without putting the customer on hold.

It remembers every customer

Your best reps remember what a regular bought last week. Wink gives every rep that memory. It loads past orders and preferences at the start of the call and uses them to pick the suggestion, so newer reps sell like your most experienced ones.

It's fast where it matters

A suggestion that arrives after the moment has passed is worth nothing. In Wink, answers to direct questions always come first, and nothing proactive is allowed to slow them down. Our engineering write-up, how we made real-time upsells fast, explains how.

It's judged by revenue

Wink is tuned on whether suggestions were pitched and whether customers bought them, not on how clever a suggestion looks. Attach rate and revenue per call are the numbers that matter.

It covers the call after it ends

Every Wink call gets a transcript and a summary, and Wink Audit AI can score every call against your own quality rubric, including sales behaviors and compliance, so QA teams can review far more than a small manual sample.

How Cresta approaches it

Cresta's product line spans an AI Agent for self-service, Agentic Assist (formerly Cresta Agent Assist) for live guidance, Conversation Intelligence for analytics across all conversations, and Quality Management for automated QA. Its Agentic Assist page describes "real-time, context-aware behavioral coaching" with hints, checklists and workflows, a Knowledge Agent for source-backed answers, and a Composer Agent for chat and email replies. Its homepage lists nine industries, from healthcare and airlines to telecom and retail, and covers voice, chat, email and SMS.

That breadth suits a large service organization that wants one vendor for many jobs. Wink goes deep on one: the live phone sale.

Proven on real sales floors

ShopLC, a retailer of jewelry, gemstones, beauty and home products, has rolled out Wink to 50 personal shoppers. Wink helps them recommend the next product during live calls and makes QA audits faster and more thorough. Read how ShopLC uses Wink. TJC's personal shoppers use Wink too.

Works with the phone system you have

Wink runs in the browser next to your dialer and integrates with Five9, which Cresta also lists as an integration. The Wink Companion for Windows brings in call audio from other softphones without a browser microphone prompt. There is nothing to rip out: most teams are live within 4 weeks.

When Wink AI is the better choice

Your reps sell products over the phone, and the goal is more revenue per call.
You sell from a large catalog where stock, sizes and variants change during the day.
Repeat customers matter, and their past orders are the best guide to what they'll buy next.
You want one suggestion at a time that reps actually use, not more alerts on screen.
You run Five9, or your reps use softphones on Windows.

When Cresta may fit better

Most of your volume is customer service rather than sales.
You want an AI agent to fully handle some calls without a person.
Your agents work chat, email and SMS as much as voice.

For more on doing the sale well, see our rep playbook for upselling on inbound calls.

Frequently asked questions

Is Wink AI a Cresta alternative?

For phone sales teams, yes. Both help agents during live calls. Wink is built specifically for selling: suggestions come from your live catalog and the customer's purchase history, and the product is tuned on what customers actually buy.

Does Wink replace human agents?

No. The customer always talks to a person. Wink sits on the rep's screen and does the remembering and searching, so the rep can listen. Our guide to real-time agent assist explains how this differs from voice bots.

Does Wink work with Five9?

Yes. Wink runs in the browser next to the dialer and integrates with Five9.

How long does it take to get Wink live?

Most teams are live within 4 weeks. Wink connects to your product catalog, customer records and phone system, then your admins invite agents.

How should I compare the two in a pilot?

Use real calls from your own queues, not a scripted demo. Measure how quickly suggestions appear after the customer stops talking, whether suggested products are in stock, how often reps use them, and the change in attach rate and revenue per call.

To learn more about the team behind Wink, read about Wink AI, or talk to sales to see Wink on your own catalog.

Sources

What this page says about Cresta comes from Cresta’s own website, checked on October 21, 2026. If something here is out of date, email contact@trywink.io and we’ll fix it.

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Wink AI vs Cresta: Real-Time AI for Phone Sales Compared