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 auditFrom our blog
Further reading
10 min read
Core Web Vitals in 2026: Why SaaS Marketing Sites Lose Rankings (and How to Fix It)
INP replaced FID as a Core Web Vital in 2024 and is now the metric most marketing sites silently fail. Here's the diagnosis and fix.
14 min read
Marketing Attribution in 2026: Why MTA Alone is Dead, and the MTA + MMM + Incrementality Stack That Replaces It
Apple's ITP, GDPR enforcement, third-party cookie deprecation, and platform walled gardens have made user-level MTA unreliable. The 2026 stack uses MTA for tactical optimization, MMM for strategy, and incrementality for causal proof.
11 min read
Programmatic SEO for B2B SaaS in 2026: When It Works and When It Tanks Your Domain
Programmatic SEO done right multiplies organic traffic 10-50x. Done wrong, it triggers Google's Helpful Content algorithm and tanks the entire domain. The difference is uniqueness, intent match, and structural quality.
Cities we serve
Email Marketing across the United States
Empire325 delivers email marketing engagements remotely with regional context built into strategy. Pick your metro for a localized overview.
New York, NY
Email Marketing
Los Angeles, CA
Email Marketing
Chicago, IL
Email Marketing
Houston, TX
Email Marketing
Phoenix, AZ
Email Marketing
Philadelphia, PA
Email Marketing
San Antonio, TX
Email Marketing
San Diego, CA
Email Marketing
Dallas, TX
Email Marketing
San Jose, CA
Email Marketing
Austin, TX
Email Marketing
Jacksonville, FL
Email Marketing
Fort Worth, TX
Email Marketing
Columbus, OH
Email Marketing
Charlotte, NC
Email Marketing
San Francisco, CA
Email Marketing
Indianapolis, IN
Email Marketing
Seattle, WA
Email Marketing
Denver, CO
Email Marketing
Boston, MA
Email Marketing
Nashville, TN
Email Marketing
Portland, OR
Email Marketing
Detroit, MI
Email Marketing
Tampa, FL
Email Marketing
Pittsburgh, PA
Email Marketing
Atlanta, GA
Email Marketing
Miami, FL
Email Marketing
Washington DC, DC
Email Marketing
Minneapolis, MN
Email Marketing
Salt Lake City, UT
Email Marketing
Raleigh-Durham, NC
Email Marketing
Las Vegas, NV
Email Marketing
Orlando, FL
Email Marketing
Cincinnati, OH
Email Marketing
Cleveland, OH
Email Marketing
Kansas City, MO
Email Marketing
Baltimore, MD
Email Marketing
Memphis, TN
Email Marketing
Louisville, KY
Email Marketing
New Orleans, LA
Email Marketing
Baton Rouge, LA
Email Marketing
Huntsville, AL
Email Marketing
Birmingham, AL
Email Marketing
Mobile, AL
Email Marketing
Savannah, GA
Email Marketing
Charleston, SC
Email Marketing
Columbia, SC
Email Marketing
Greenville, SC
Email Marketing
Knoxville, TN
Email Marketing
Chattanooga, TN
Email Marketing
Augusta, GA
Email Marketing
Fayetteville, NC
Email Marketing
Durham, NC
Email Marketing
Wilmington, NC
Email Marketing
Greensboro, NC
Email Marketing
Richmond, VA
Email Marketing
Norfolk, VA
Email Marketing
Virginia Beach, VA
Email Marketing
Hartford, CT
Email Marketing
Stamford, CT
Email Marketing
New Haven, CT
Email Marketing
Newark, NJ
Email Marketing
Jersey City, NJ
Email Marketing
Allentown, PA
Email Marketing
Harrisburg, PA
Email Marketing
Buffalo, NY
Email Marketing
Rochester, NY
Email Marketing
Albany, NY
Email Marketing
Syracuse, NY
Email Marketing
Worcester, MA
Email Marketing
Springfield, MA
Email Marketing
Providence, RI
Email Marketing
Manchester, NH
Email Marketing
Burlington, VT
Email Marketing
Portland, ME
Email Marketing
Milwaukee, WI
Email Marketing
Madison, WI
Email Marketing
Omaha, NE
Email Marketing
Lincoln, NE
Email Marketing
Des Moines, IA
Email Marketing
Sioux Falls, SD
Email Marketing
Fargo, ND
Email Marketing
Wichita, KS
Email Marketing
Akron, OH
Email Marketing
Dayton, OH
Email Marketing
Toledo, OH
Email Marketing
Grand Rapids, MI
Email Marketing
Ann Arbor, MI
Email Marketing
Lansing, MI
Email Marketing
Fort Wayne, IN
Email Marketing
South Bend, IN
Email Marketing
Evansville, IN
Email Marketing
Peoria, IL
Email Marketing
Rockford, IL
Email Marketing
Champaign, IL
Email Marketing
Columbia, MO
Email Marketing
Springfield, MO
Email Marketing
Lexington, KY
Email Marketing
El Paso, TX
Email Marketing
Corpus Christi, TX
Email Marketing
Lubbock, TX
Email Marketing
Amarillo, TX
Email Marketing
Midland, TX
Email Marketing
Shreveport, LA
Email Marketing
Lafayette, LA
Email Marketing
Oklahoma City, OK
Email Marketing
Tulsa, OK
Email Marketing
Albuquerque, NM
Email Marketing
Santa Fe, NM
Email Marketing
Tucson, AZ
Email Marketing
Scottsdale, AZ
Email Marketing
Tempe, AZ
Email Marketing
Colorado Springs, CO
Email Marketing
Boulder, CO
Email Marketing
Fort Collins, CO
Email Marketing
Boise, ID
Email Marketing
Sacramento, CA
Email Marketing
Fresno, CA
Email Marketing
Bakersfield, CA
Email Marketing
Stockton, CA
Email Marketing
Riverside, CA
Email Marketing
San Bernardino, CA
Email Marketing
Irvine, CA
Email Marketing
Anaheim, CA
Email Marketing
Long Beach, CA
Email Marketing
Santa Barbara, CA
Email Marketing
Oakland, CA
Email Marketing
Fremont, CA
Email Marketing
Palo Alto, CA
Email Marketing
Mountain View, CA
Email Marketing
Sunnyvale, CA
Email Marketing
Santa Monica, CA
Email Marketing
Tacoma, WA
Email Marketing
Spokane, WA
Email Marketing
Eugene, OR
Email Marketing
Bend, OR
Email Marketing
Anchorage, AK
Email Marketing
Honolulu, HI
Email Marketing
Tallahassee, FL
Email Marketing
Gainesville, FL
Email Marketing
West Palm Beach, FL
Email Marketing
Fort Lauderdale, FL
Email Marketing
Fort Myers, FL
Email Marketing
Long Island, NY
Email Marketing
Roanoke, VA
Email Marketing
Modesto, CA
Email Marketing
Wilmington, DE
Email Marketing
Flint, MI
Email Marketing
Pensacola, FL
Email Marketing
All 50 states
Email Marketing in every US state
Empire325 delivers email marketing programs to clients in every state, calibrated to local industry concentrations and buyer dynamics. Pick your state for a tailored overview.