Integration category · 02

Real-time email and SMS, triggered by demand.

Flockr fires events into your customer engagement platform the moment a shopper enters a cohort. Cart abandonment with scarcity context. Browse abandonment with momentum signal. Lifecycle flows that reflect what's actually happening on your store, not a generic schedule.

Trigger
Visitor abandons cart with low-stock product
Flockr
Cohort entered cart_abandoned_low_stock
real-time webhook
Your CEP
Flow triggered
Klaviyo Braze Attentive
Outcome
Email or SMS sent within minutes
What it covers

What "customer engagement platform" means here.

Customer engagement platforms are how most retailers run their email and SMS programmes. They hold profiles keyed on email or phone, run automated flows triggered by events, and let marketers build segments from customer behaviour.

They're the natural home for Flockr's cohort transitions — every cohort entry is something a flow can react to.

Klaviyo Braze Attentive Iterable BlueCore Mailchimp HubSpot
Patterns

Three patterns. Every customer engagement platform.

The same three patterns work across every CEP we integrate with — only the API surface changes. This is what your team would actually build with the integration once it's live.

#01 Trigger

Trigger flows on cohort transitions.

When a shopper enters a Flockr cohort, your CEP runs the flow you've built for that moment. Cart abandonment with scarcity-aware copy. Browse abandonment with momentum signal. Lifecycle messaging that fires when demand changes, not when a calendar says so.

Example trigger event
Flockr Cohort Entered with cohort_id, abandoned_products, top_signal, cart_value
#02 Personalise

Personalise content with cohort context.

The same event payload that triggers the flow also feeds the email's content. Subject lines that reference current scarcity. Product cards rendered from the cohort's captured cart. Copy that branches on which signal is strongest. No template logic to wire by hand.

Example subject line
{{ event.cart_product_count }} items, only {{ event.lowest_stock }} left of the most popular
#03 Segment

Build segments and suppress sends.

Beyond triggered flows, cohort membership becomes profile properties your CEP can use everywhere. Build a segment of "active cart abandoners" and exclude them from broadcast sends. Build a high-value loyalty segment from "scarcity-tipped purchasers" and route them to a VIP series.

Example suppression rule
Suppress newsletter from anyone where flockr_cart_stage is active
The mechanism

What the integration looks like.

Flockr's webhook output is the primary integration surface — the reliability backbone for every CEP integration. Where the platform has its own onsite SDK, Flockr's tag can also fire events directly from the browser for sub-second latency.

Server-side

Real-time webhook

Cohort engine
Webhook POST
Customer engagement platform
Flow triggers
~seconds Reliability backbone — works with every CEP we support.
Browser-side

Onsite SDK relay

Storefront tag
CEP onsite SDK
Customer engagement platform
Flow triggers
sub-second Where the CEP exposes an onsite SDK that can fire events natively.
Destinations

The platforms Flockr connects to.

Six featured customer engagement platforms. The integration shape is the same for each — server-side webhook events with platform-specific event shaping handled by Flockr.

K
Klaviyo

The most common destination for Flockr-powered email and SMS. Cohort transitions fire as Klaviyo events; flows trigger from them; event properties drive content branching and personalisation.

Server-side webhook. Onsite SDK available for in-session triggers.
B
Braze

Cross-channel orchestration for retailers running email, SMS, and push from a single platform. Flockr cohorts feed Braze Canvases the same way they feed Klaviyo Flows.

Server-side via /users/track. Custom attributes for cohort properties.
A
Attentive

SMS-first conversational marketing. Cart abandonment via SMS often outperforms email on time-sensitive cohorts; Flockr's scarcity-aware triggers map directly onto Attentive's message flows.

Server-side via Attentive's events API.
I
Iterable

Workflow-driven cross-channel marketing. Flockr cohort transitions trigger Iterable journeys; cohort attributes populate dynamic content blocks.

Server-side via Iterable's events API.
Bc
BlueCore

Retail-specific lifecycle marketing. Flockr's signal-aware cohorts upgrade BlueCore's own behavioural triggers — cart abandonment becomes "cart abandonment with momentum context".

Server-side webhook. Suited to BlueCore's predictive lifecycle model.
M
Mailchimp · HubSpot

Standard CEPs for smaller and mid-market retailers. Flockr cohorts arrive as events; segments built from them work the same way custom audiences always have.

Server-side via standard events APIs.

Don't see your platform? Most customer engagement platforms support standard events APIs — Flockr's webhook output works with anything that accepts HTTP-shaped events.Contact us about your stack →

Worked example

Cart abandonment, scarcity-aware.

One scenario, end to end. The shopper, the cohort, the webhook, the flow, the email — every step in real time, with Flockr deciding what's true and your CEP deciding what to say.

The setup

A shopper adds a low-stock trail jacket to their cart at 14:00. Two hours later they haven't completed checkout. Flockr's cart_abandoned_low_stock cohort fires.

14:00
1

Add to cart.

The shopper adds the jacket. Flockr captures the add-to-cart event and the product's current signal state — low stock, momentum surging.

add_to_cart · stock>3 · momentum=surging
16:00
2

Cohort entry.

Two hours pass without a purchase. Flockr's delay-queue evaluator confirms the cart still contains the product, the product is still low-stock, and fires the cohort entry.

cohort: cart_abandoned_low_stock · entered
16:00:02
3

Webhook delivered.

A signed webhook reaches your customer engagement platform with the full cohort context — anonymous visitor ID, abandoned products, current signal state, cart value.

POST /events · 200 OK · 187ms
16:00:05
4

Flow triggered.

Klaviyo's "Cart Recovery — Scarcity" flow triggers. The first email queues with subject line "Only 3 left of your trail jacket — secure it now."

flow: cart_recovery_scarcity · triggered
16:02
5

Email delivered.

The shopper receives the email. Product image rendered with live scarcity overlay. Click-through goes straight to the cart.

delivered · open rate measured by CEP

The whole sequence runs without a calendar trigger, without batch processing, and without your team writing the message — Flockr decides who's in the cohort and what's true about the products; your CEP decides what to say.

Wire Flockr into your customer engagement platform.

Thirty minutes with a Flockr engineer. We'll wire your real cohorts into the CEP you already run — server-side webhook for reliability, browser-side SDK where it's available.