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A hand holding an iPhone with the Siren agent interface

Build a 1:1 relationship with every customer after checkout.

Siren deploys AI agents that engage every customer after they buy. They protect revenue, grow it, and turn the silent majority of shoppers into a continuous source of intelligence.

01

Protect & grow revenue

Save sales. Drive the next order.

02

Capture zero-party data

The silent 95%, on the record.

03

Build relationships

A personal thread with every customer.

Built by retail and technology operators from

Amazon
American Express
Google
Stripe
Meta
Maisonette
Amazon
American Express
Google
Stripe
Meta
Maisonette

Post-purchase is the most valuable and most underleveraged moment in commerce.

01

Brands spend millions to acquire customers, then go silent the second they hit buy.

02

The 30 days that follow are the highest-stakes window in the lifecycle. Loyalty is earned or lost for good.

03

A 1:1 relationship after checkout has never scaled, so checkout gets treated as the finish line instead of the start.

Siren is the post-purchase layer for agentic commerce.

We deploy AI agents that engage customers after checkout to protect revenue, grow it, and capture high-value intelligence. For the first time, businesses can shape customer outcomes after purchase rather than only react to them.

Siren icon

Native to iMessage

The blue bubble. The channel customers reserve for people they trust. Not another portal, app, or dead SMS thread.

Siren icon

Sits on top of your stack

Siren plugs in alongside the systems you already run and makes them more valuable. No rip and replace.

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Compounds across orders

Every reply teaches the agent more about your customers and how they actually experience your products. Fit, intent, and catalog signal sharpen with each thread.

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iMessage
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A conversation, not a campaign.

A relationship that begins the moment the order is placed and compounds across every order that follows.

  1. 01

    Day 0

    After checkout

    The agent introduces itself in your brand voice and opens a personal thread the moment an order is placed.

  2. 02

    Day 3

    Through delivery

    Shipping updates become relationship touchpoints instead of transactional noise.

  3. 03

    Day 7

    When it arrives

    A proactive check-in as the customer tries the product for the first time. The way a great associate would.

  4. 04

    Day 14

    The decision moment

    The agent moves the customer toward the right outcome. Saves the sale, recommends an alternative, and captures the why behind the decision.

  5. 05

    Day 30+

    Thread stays open

    Becomes a personal point of contact that drives the next purchase, and the one after that.

With every customer, after checkout.

Siren is building a future of commerce where every business can have a one-to-one relationship with every customer. What was lost when commerce moved online, restored at the scale of the internet.

What begins as a better interaction becomes a lasting source of intelligence, retention, and growth.

Seller
M
Maya
J
Jordan
A
Ana
P
Priya
D
Dev

One brand · Every customer · Their own thread

What this drives for your brand.

One layer working across your post-purchase window, moving the metrics that decide whether a customer becomes a repeat customer for your brand.

01

Fewer returns

Resolve fit, sizing, and expectation gaps in the thread, before the box ever ships back to you.

02

More exchanges

Turn would-be refunds into swaps for the right size, color, or alternative product in your catalog.

03

Retained revenue

Save sales for your brand that would have churned out as refunds, chargebacks, or silent attrition.

04

New revenue in-thread

Cross-sell and upsell your products naturally inside an open, opted-in conversation customers actually want.

05

Higher LTV

Lift your repeat purchase rate and lifetime value as the relationship with each customer deepens across orders.

06

Better CSAT

Give your customers a real, responsive point of contact they describe as the best service they've had from a brand.

07

Fewer support tickets

Proactive outreach absorbs the questions that would have hit your helpdesk on Monday morning.

08

Zero-party intelligence

A new, structured data source on your customers and products, in their own words, feeding the systems you already run.

Every conversation becomes structured, machine-readable data.

Customer intelligence and product intelligence. A new zero-party data source, in the customer's own words, captured at the level of the SKU and the shopper, then fed back into the systems you already use.

01

Conversations

02

Structured Intelligence

03

Systems & Workflows

What customers actually say — unstructured, 1:1, continuous.

The product customers are talking about
setup took 20 min
i use it for my coffee routine
wish it synced with Apple Home
battery only lasts 3 days
comparing to Nest

Every conversation becomes machine-readable, queryable data.

Customer Intelligence

What they want next — so you sell better

  • household2 adults · 1 pet
  • use_casecoffee_routine
  • integrationApple Home
  • intentsmart_home_upgrade · 30d
  • churn_risklow

Product Intelligence

How they experience your products — so you build better

  • top_use_caseenergy_tracking
  • feature_requesthomekit_sync
  • quality_flagbattery_3d_vs_7d
  • top_return_reasonapp_pairing_friction
  • sentimentmixed

Flows back into the tools and teams you already run.

  • CRM & Marketing

    Segment. Personalize. Retain.

  • Product Development

    Build what customers ask for.

  • Merchandising

    Fix listings before they bounce.

  • QA & Supply

    Catch defects before they scale.

  • Catalog & Discovery

    Richer metadata, better search.

Plugs into the stack you already run.

API-based setup typically completes in under a week with little to no engineering lift. Siren operates within standard TCPA-compliant messaging flows where customers explicitly opt in before any conversation begins.

  • Commerce platform
  • Helpdesk
  • Email & SMS
  • Returns portal
  • Reviews
  • Loyalty

Integrates with

iMessageiMessage
SMS / RCSSMS / RCS
ShopifyShopify
KlaviyoKlaviyo
GorgiasGorgias
YotpoYotpo
AttentiveAttentive
+ more

Backed by

NYFTL
Harvard Innovation Lab
Underscore VC
Diker Ventures
NYFTL
Harvard Innovation Lab
Underscore VC
Diker Ventures

Post-purchase has always been a dead end. We're making it the most valuable moment in retail.