Retention agencies
Summary
Retention agencies listed here name retention on their own website. Listings are in alphabetical order. Unclaimed listings show five facts from each agency's public site, and claiming a listing does not change its position.
Claiming does not change order.
Before you shortlist
Search by specialty: SEO, paid social, email and more.
Retention39
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- BMO MediaWho they serve: DTC and ecommerce brands buying coordinated lifecycle retention across email, SMS, loyalty, push, and subscriptions.Location–SpecialtiesretentionKlaviyoAttentive+5LinkedIn –Open their site (opens external site)
- CartStringsWho they serve: Established ecommerce brands buying end-to-end email and SMS retention as an outsourced retention team.Location–SpecialtiesretentionKlaviyoemail+2LinkedIn –Open their site (opens external site)
- Class A MediaWho they serve: Ecommerce brands buying email and SMS retention flow systems (project-based, no ongoing retainers per site).Location–SpecialtiesretentionKlaviyoemail+2LinkedIn –Open their site (opens external site)
- ECD Digital StrategyWho they serve: DTC ecommerce brands buying email/SMS retention plus paid media and conversion optimization; named as a Klaviyo Master Elite partner.Location–SpecialtiesretentionKlaviyoemail+1LinkedIn –Open their site (opens external site)
- Email OptimizeWho they serve: Ecommerce DTC brands buying engineered Klaviyo email programs focused on revenue mechanics.Location–SpecialtiesretentionKlaviyoemailLinkedIn –Open their site (opens external site)
- FlowiumWho they serve: Ecommerce brands buying email, SMS, and lifecycle retention marketing systems.Location–SpecialtiesretentionKlaviyolifecycle+1LinkedIn –Open their site (opens external site)
- FluenceFlowWho they serve: DTC and Shopify ecommerce brands buying custom Klaviyo email and SMS retention systems (flows, campaigns, list growth).Location–SpecialtiesretentionKlaviyoemail+2LinkedIn –Open their site (opens external site)
- Homestead StudioWho they serve: DTC brands buying acquisition and retention.Location–SpecialtiesretentionlifecyclePaid SocialLinkedIn –Open their site (opens external site)
- Hustler MarketingWho they serve: Ecommerce brands buying managed email and SMS retention marketing (also offers UGC ads).Location–SpecialtiesretentionemailSMS+1LinkedIn –Open their site (opens external site)
- KleverWho they serve: Ecommerce and DTC brands buying email and SMS retention programs built in Klaviyo.Location–SpecialtiesretentionKlaviyoemail+1LinkedIn –Open their site (opens external site)
- Lilo SocialWho they serve: DTC and subscription brands buying full-funnel growth with a named email/SMS retention practice.LocationBrooklyn, New YorkSpecialtiesretentionKlaviyoemail+2LinkedIn –Open their site (opens external site)
- Luck & CoWho they serve: 7–9 figure ecommerce brands buying email and SMS retention and lifecycle marketing only.Location–SpecialtiesretentionemailSMS+2LinkedIn –Open their site (opens external site)
- Magnet MonsterWho they serve: Fast-growth DTC brands buying flat-fee email, SMS, WhatsApp, and direct-mail retention.LocationUnited Kingdom; SingaporeSpecialtiesretentionKlaviyoemail+3LinkedIn –Open their site (opens external site)
- Melusine StudioWho they serve: Premium D2C ecommerce brands buying Klaviyo email, SMS, and connected retention/CRM programs.LocationUKSpecialtiesretentionKlaviyoemail+2LinkedIn –Open their site (opens external site)
- Metron GrowthWho they serve: Marketing and data teams turning customer data into efficient marketing, personalisation, and retention.LocationSwindon, UKSpecialtiesretentionattributionanalyticsLinkedIn –Open their site (opens external site)
- MineralWho they serve: Brands buying retention marketing across email, SMS, and direct mail.Location–SpecialtiesretentionlifecycleemailLinkedIn –Open their site (opens external site)
- MKTG EmailsWho they serve: 7–9 figure ecommerce and DTC brands buying email, SMS, and lifecycle retention marketing only.Location–SpecialtiesretentionKlaviyoemail+2LinkedIn –Open their site (opens external site)
- No Limit EmailWho they serve: DTC brands buying full-service email and SMS to convert and retain customers for higher LTV.Location–SpecialtiesretentionKlaviyoemail+2LinkedIn –Open their site (opens external site)
- Nudge StudioWho they serve: DTC ecommerce brands buying email, SMS, and referral retention programs with Klaviyo execution.Location–SpecialtiesretentionKlaviyoemail+1LinkedIn –Open their site (opens external site)
- OptimiteWho they serve: Ecommerce brands ($1M–$30M) buying connected email, SMS, lifecycle, loyalty, and subscription retention.Location–Specialtiessubscription retentionKlaviyolifecycle+4LinkedIn –Open their site (opens external site)
- PerennialWho they serve: DTC and ecommerce brands handing off full-service email and SMS lifecycle/retention programs.Location–SpecialtiesretentionKlaviyoemail+2LinkedIn –Open their site (opens external site)
- Postman AgencyWho they serve: Ecommerce brands buying retention marketing via email, SMS, WhatsApp, and loyalty programs.Location–SpecialtiesretentionKlaviyoemail+3LinkedIn –Open their site (opens external site)
- RELAINWho they serve: 7–9 figure DTC brands buying founder-led, Klaviyo-first retention across email, SMS, WhatsApp, and direct mail.Location–SpecialtiesretentionKlaviyoemail+4LinkedIn –Open their site (opens external site)
- RetainIQWho they serve: D2C brands buying full-service lifecycle email and retention systems (flows, campaigns, deliverability).Location–SpecialtiesretentionKlaviyoOmnisend+2LinkedIn –Open their site (opens external site)
- Retention HarborWho they serve: DTC ecommerce brands buying Klaviyo email and SMS retention rebuilds via their Revenue Anchor program.Location–SpecialtiesretentionKlaviyoemail+1LinkedIn –Open their site (opens external site)
- Retention LabsWho they serve: Ecommerce and DTC brands buying email, SMS, Messenger, and automation retention programs.Location–SpecialtiesretentionKlaviyoemail+3LinkedIn –Open their site (opens external site)
- Retentive Co.Who they serve: DTC brands buying Klaviyo email and SMS retention only (no paid ads).Location–SpecialtiesretentionKlaviyoemail+2LinkedIn –Open their site (opens external site)
- Sent AgencyWho they serve: Growth-focused beauty, wellness, and apparel brands buying full-service email, SMS, loyalty, and subscription retention.Location–SpecialtiesretentionemailSMS+2LinkedIn –Open their site (opens external site)
- Signify StudioWho they serve: DTC ecommerce brands buying Klaviyo-certified email, SMS, and lifecycle retention management.Location–SpecialtiesretentionKlaviyoShopify+3LinkedIn –Open their site (opens external site)
- Sticky DigitalWho they serve: DTC brands buying full-service email and SMS retention marketing and customer-retention strategy.Location–SpecialtiesretentionemailSMS+1LinkedIn –Open their site (opens external site)
- Stimulate AgencyWho they serve: DTC ecommerce brands buying full-service email, SMS, and retention marketing with Klaviyo management.Location–SpecialtiesretentionKlaviyoemail+2LinkedIn –Open their site (opens external site)
- Sweat Pants AgencyWho they serve: DTC and subscription brands ($3M–$100M+) buying email and SMS retention plus paid acquisition.Location–SpecialtiesretentionKlaviyoemail+1LinkedIn –Open their site (opens external site)
- TentionWho they serve: Fast-growth DTC brands buying done-for-you Klaviyo flows, campaigns, and retention email programs.Location–SpecialtiesretentionKlaviyoemailLinkedIn –Open their site (opens external site)
- The Email ExperienceWho they serve: Ecommerce brands buying email and SMS program builds, campaign support, mentorship, and managed retention work.Location–SpecialtiesretentionemailSMS+1LinkedIn –Open their site (opens external site)
- The Email MarketersWho they serve: 8- and 9-figure ecommerce brands buying retention across email, SMS, direct mail, subscriptions, and loyalty.Location–SpecialtiesretentionemailSMS+3LinkedIn –Open their site (opens external site)
- Underground EcomWho they serve: Fast-growth DTC brands buying CRM, email, SMS, and WhatsApp customer-retention programs.Location–SpecialtiesretentionKlaviyoCRM+3LinkedIn –Open their site (opens external site)
- YOCTOWho they serve: DTC and subscription ecommerce brands buying Klaviyo email, SMS, and lifecycle retention programs.Location–Specialtiessubscription retentionKlaviyolifecycle+1LinkedIn –Open their site (opens external site)
- Zettler DigitalWho they serve: Ecommerce brands buying Klaviyo email/SMS retention, paid media, and Shopify storefronts; named Retention discipline.Location–SpecialtiesretentionKlaviyoemail+2LinkedIn –Open their site (opens external site)
- ZorontoWho they serve: Ambitious DTC brands buying boutique founder-led email and SMS retention and lifecycle programs.Location–SpecialtiesretentionemailSMS+1LinkedIn –Open their site (opens external site)
What is a retention agency?
A retention agency is a team that runs email, SMS, and offers for people who have already bought.
Most companies bring one in when:
- A new customer costs more than the first order is worth.
- Buyers purchase once and disappear.
- Email and SMS only talk to people who have never bought.
Before you reach out
- What you need to have. A clear goal and a monthly budget range.
- How to know an agency fits. They have worked in your industry and your channel.
- What must be in place. Access to your analytics and ad accounts.
- Questions to ask them. Which clients like us have you worked with? Who will run our account? How will you report results? What happens if it isn't working by month three?