Email Marketing Agency
Email marketing services that drive revenue, not just opens
Empire325 is an email marketing agency for B2B SaaS, e-commerce, and financial services. Lifecycle email, retention automation, deliverability engineering, and revenue-attributed email programs across Klaviyo, HubSpot, Iterable, Customer.io, Marketo, Braze, and Salesforce Marketing Cloud.
Book a 15-min email auditTL;DR: Empire325 email marketing services combine lifecycle program design, deliverability engineering, and revenue attribution. Every email program ties back into the [data warehouse](/services/data-transformation) so marketing-attributed revenue is computed automatically and CFO-defensibly.
What we deliver
The full email marketing services stack
01
Lifecycle program design
Welcome series, onboarding sequences, behavioral triggers, nurture, retention, win-back, abandoned-cart/abandoned-application recovery, post-purchase, reactivation. Built around customer lifecycle stages, not calendar dates.
02
Deliverability engineering
SPF/DKIM/DMARC alignment, sender reputation monitoring, engagement-segmented sending, list hygiene automation, dedicated IP warmup. We audit inbox placement against major mailbox providers (Gmail, Outlook, Yahoo, Apple Mail).
03
Revenue attribution
Email programs tied directly to the data warehouse. Every send tracked back to actual revenue (not just opens/clicks). Reports CFOs can defend.
04
A/B testing & optimization
Subject-line testing, send-time optimization, content variant testing, send-frequency calibration. Statistical rigor — not just 'this version got more opens.'
05
Platform migration
Migrations from Mailchimp → Klaviyo, HubSpot → Iterable, Marketo → Customer.io. We handle template porting, automation rebuilding, deliverability transition, and historical data preservation.
06
Compliance
GDPR, CCPA, CASL, SEC Marketing Rule (for asset managers). We build email programs that respect consent frameworks and pass legal review.
What lifecycle email programs typically deliver
Industry-typical outcomes from full lifecycle email program engagements with deliverability engineering and revenue attribution:
20-40%
lift in email-attributed revenue when lifecycle programs replace ad-hoc broadcast campaigns and tie into the data warehouse
85-95%
inbox placement targets after deliverability rebuild — SPF/DKIM/DMARC alignment, sender reputation monitoring, engagement segmentation
15-30%
of effective list reach typically recovered within 60 days from deliverability infrastructure work alone
Email marketing agency FAQ
What does an email marketing agency do?
An email marketing agency builds and operates lifecycle email programs (welcome series, onboarding, nurture, retention, win-back, transactional), runs broadcast campaigns, and manages deliverability infrastructure (SPF, DKIM, DMARC, list hygiene, sender reputation). Empire325 also ties email programs into the data warehouse so revenue attribution is automated, not manually computed.
What email platforms does Empire325 work with?
Empire325 implements Klaviyo (e-commerce), HubSpot Marketing Hub (B2B mid-market), Iterable (mid-market to enterprise B2C), Customer.io (developer-focused SaaS), Marketo (enterprise B2B), Braze (enterprise B2C), and Salesforce Marketing Cloud (enterprise multi-channel). The choice depends on your stack, scale, and primary use case.
How much do email marketing services cost?
Empire325 email marketing engagements typically range $6K-$30K monthly retainers depending on platform complexity, content velocity, and lifecycle program depth. Setup engagements (new platform implementation, migration, lifecycle program build-out) range $20K-$80K project-based.
Why does email deliverability matter so much?
Email deliverability — whether your messages actually reach the inbox vs. spam folder — is the most under-managed driver of email program ROI. SPF/DKIM/DMARC alignment, list hygiene, sender reputation monitoring, and engagement-segmented sending matter more than any creative work. Empire325 audits deliverability infrastructure on every email engagement and typically recovers 15-30% of effective list reach within 60 days.
How is Empire325 different from other email marketing agencies?
Three differences: (1) We engineer deliverability rigorously — most agencies just send, we monitor inbox placement, sender reputation, and engagement segmentation. (2) Email programs are tied to the data warehouse for revenue attribution, not just open/click metrics. (3) We operate full lifecycle programs end-to-end, not just broadcast campaigns.
Want a free 15-minute email program audit?
We'll review your lifecycle programs and deliverability infrastructure, identify the 3 highest-leverage improvements.
Book a 15-min email audit