Product guide, September 2026
Black Friday email with Product Agents
Seven agents for Klaviyo. Turn Black Friday buyers into customers who come back.
The opportunity
A hundred people buy from you that week
68 of them had not bought from you in the previous twelve months, and they brought 67% of the weekend's revenue. Only 4 had also bought from you the Black Friday before.
100
People who buy from you in Black Friday week.
Your deepest discounts of the year, in an inbox where every other store is sending the same offer to the same people.
Source: Hello Retail report, Why Black Friday is a retention event, 2026.
Seven insights from three years of Black Friday data: Get the report
Watch, decide, send
Product Agents are Hello Retail's always-on AI agents for Klaviyo. They check every customer against every product, and decide per person what to send and when.
- 01WatchEvery customer, against every product, all day.Views, purchases and repeat patterns across your whole customer base.
- 02DecideWhat lands best for this person, and when.If nothing is worth sending, nothing is sent.
- 03SendThrough your Klaviyo account.Your template, your list, your tone of voice.
The agents
Seven agents for Klaviyo
Three work on what somebody already bought: Replenishment Reminder, Recommended Addons and Alternative Picks. Four work on what a price drop makes newly worth saying: Price Drop for a viewed product, an alternative product, a complementary product, and a purchased replenishment.
Triggered by an order
Somebody bought something. These three work out what comes next, and when.
Replenishment Reminder
Predicts when a specific purchase runs out, based on how long each product actually lasts.
Recommended Addons
Suggests the product that logically follows a purchase, timed to land when it is useful.
Alternative Picks
Recommends similar or comparable products based on what a customer purchased or viewed.
Triggered by a price drop
A price dropped. These four work out who to email.
Price Drop – Viewed Product
Tells a shopper the exact item they looked at is now cheaper.
Price Drop – Alternative Product
Reaches shoppers who viewed something similar to what just went on sale.
Price Drop – Complementary Product
Flags a discount on something that pairs with what a customer already owns.
Price Drop – Purchased Replenishment
Alerts previous buyers when a product they repurchase goes on sale.
The season
One setup, three phases
In October and November the agents build the audience your discounts can reach, and you pick the discounts. During the week they turn every qualifying price drop into individual emails, and you run your campaigns as planned. In December and January they work every order the week placed, and you do nothing. Pick a phase.
You grow the list, we help you plan the discounts
- Your signup push turns into a personal price alert instead of one more mass campaign.
- The Price Drop Potential dashboard ranks products by the audience a discount could reach.
Every qualifying price drop becomes a trigger
- One discount reaches four kinds of buyer instead of one.
- Sends are ranked for relevance and capped at one per person per day.
- Your existing campaigns, flows and newsletter schedule are untouched.
Follow-up on your orders with relevant emails
- Refill timing read from the actual order, not a fixed schedule.
- Add-ons for the gifts and the big purchases.
- January’s sale reaches November’s buyers, with no segment to build.
Black Friday week
One discount, four audiences
The four are the shopper who viewed this exact cream, the shopper who viewed a similar cream, the customer who bought it before, and the customer who owns the cleanser it pairs with. A rule finds only the first. Flip the switch.
One price drop
Face cream, now 30% off
Who hears about it
- The shopper whoViewed this exact creamNever hearsThe one they kept coming back to, at the price they were waiting for.Trigger firesOne group out of four, the only one a rule can find.Price Drop – Viewed ProductThe one they kept coming back to, at the price they were waiting for.
- The shopper whoViewed a similar creamNever hearsThey never saw this one. It sits in a sale page four hundred products long.Trigger firesOne group out of four, the only one a rule can find.Price Drop – Alternative ProductThey never saw this one. It sits in a sale page four hundred products long.
- The shopper whoBought this cream beforeNever hearsA repeat buyer, reached at sale price before somebody else discounts it.Trigger firesOne group out of four, the only one a rule can find.Price Drop – Purchased ReplenishmentA repeat buyer, reached at sale price before somebody else discounts it.
- The shopper whoOwns the cleanser it pairs withNever hearsA campaign would have shown them another cleanser.Trigger firesOne group out of four, the only one a rule can find.Price Drop – Complementary ProductA campaign would have shown them another cleanser.
A rule reaches one of the four. The other three wanted to know too.
One agent email per person per day
However many agents qualify for the same customer on the same morning, only one, the most relevant, goes out.
You can make it stricter, layer your own frequency limits on top, and pause or restart any agent with the same toggle.
After Black Friday
One order, three follow-ups
An espresso machine and two bags of beans, bought in November. In December the descaler follows, January's sale reaches the beans they already repurchase, and in February the beans run low. Step through it.
65 to 80%
more items in each order from the customers who came back, and a typical order worth about a quarter more. The buyer you keep is a better buyer than the one you acquired.
Source: Hello Retail report, Why Black Friday is a retention event, 2026.
Does this fit your catalog?
Product Agents run on Klaviyo, so that is the usual starting point. After that, two questions: do your prices move, and do your products get bought again?
Beauty & personal care
predictable run-out cycles, and a price drop triggers a stock-up
Health & wellness
supplements, vitamins and protein, on monthly cycles
Pet care
food, treats and litter, very predictable timing
Food & beverage
coffee, snacks and beverages, the empty pantry is predictable
Baby & child
diapers, wipes and formula, high necessity
Electronics & accessories
large catalogs where price is the primary mover
Home & garden
heavy window-shopping, a drop on a tracked item converts
Fashion
browse-heavy, price-sensitive, one of the biggest categories
Customer
They're just running in the background, bringing in solid, quiet revenue that we would have lost otherwise.
A look at the first six pages
The first six pages, to open and read here. The other seventeen are in the guide, free and without a form.
Free trial
Try Product Agents free on Shopify and Klaviyo
- For Shopify stores that send email with Klaviyo
- 14 days or 500 emails, whichever comes first
- No card, no commitment: when the trial stops, you decide
Product Agents works with most ecommerce platforms. Already a Hello Retail customer on Klaviyo? Start the trial from the Product Agents tab in your Hello Retail account, whatever your platform. Everyone else can book a meeting on the Product Agents page.
Start today
Sign up, connect Shopify and Klaviyo, and switch on your agents yourself. No calls and nothing to wait on.
Start free trialNo card needed · You need Shopify admin access and a Klaviyo account
Read the setup documentation