Email marketing execution without the agency backlog
Nexus builds flows, segments, and campaign schedules in your ESP. Strategy, copy, and send setup arrive as finished work you approve before anything goes to subscribers.
Lifecycle
Welcome, post-purchase, win-back, and promo flows
Segments
Audience builds tied to your store and engagement data






What you receive
Flows, segments, and campaigns built in your ESP
Automation flows built and QA'd in Klaviyo or your connected ESP
Campaign calendars with copy, segments, and send timing recommendations
Segment definitions for promos, VIPs, and retention audiences
SMS companion messages where Postscript or Attentive is connected
Capabilities
What we execute in email marketing
Welcome and onboarding
Multi-step flows that introduce your brand and first purchase path.
Post-purchase and win-back
Retention sequences based on order behavior and lapse windows.
Campaign scheduling
Promo and seasonal sends with segments and timing set up in your ESP.
Segmentation
VIP, churn-risk, and product-interest audiences ready to target.
A/B test setup
Subject line and content tests configured for your next send.
SMS lifecycle
Coordinated SMS touches when your SMS platform is connected.

How it works
Start investing in minutes
Connect your accounts, let AI analyze your data, and get clear insights to make smarter decisions.
Connect your accounts
Link your ESP, Shopify, and analytics for full customer context.
Nexus builds the program
We scope flows, segments, and campaigns from your goals and store data.
Approve and activate
Review in your ESP staging environment before sends go live.
What lands on your board
Risk analysis that
goes deeper
Standard tools show you what happened. Ours shows what's about to using scenario simulation and stress-testing across 1,000+ historical market regimes.
Flows built in your account, not documented in a slide deck
Segments you can reuse for future campaigns
Send calendar with clear ownership after approval
QA notes included before activation

Platforms we use
ESP and retention platforms we work in
Execution happens in the tools you already pay for, with full context from your store.

Klaviyo
Flows, segments, campaigns, and reporting in your Klaviyo workspace.

Postscript
SMS campaigns and flows paired with email lifecycle work.

Attentive
SMS journeys aligned to email segments and promos.

Mailchimp
Automations and campaigns for teams on Mailchimp.

Shopify
Order, product, and customer data driving segmentation logic.

Braze
Cross-channel journeys for larger retention programs.