Email & retention agencies

Andzen

Sydney, Australia (per Klaviyo directory); Australian-founded with teams in Sydney, Toronto, Berlin, Spain and the United States

Retention marketing, lifecycle CRM, email & SMS automation, customer journey optimization, omnichannel messaging (email/SMS/MMS/RCS/WhatsApp/push), Klaviyo Data Platform implementation

Klaviyo

Pricing

not publicly available ('individual pricing based on scope' per Flowium listicle)

Bay Leaf Digital

Grapevine, TX, USA (2140 Hall Johnson Rd, Suite 102-180)

Marketing automation, HubSpot/HighLevel management, customer retention & expansion marketing, marketing analytics, sales enablement; plus SEO/GEO, content, PPC, GTM strategy for B2B SaaS

HubSpot

Pricing

public packages: Authority Builder $3,999/month (6-month engagement); Growth Partner from $5,000/month; Marketing AI Transformation project fee + advisory (own pricing page)

Singapore (Sin Ming Lane, Midview City); serves US clients (US phone line, USD engagements)

Email, SMS, push notifications, WhatsApp, RCS, direct mail, paid media; lifecycle programs across 11 platforms

HubSpot · Shopify · Klaviyo

Pricing

not publicly available on own site; 'starts at $6K/month and scales with sends' per MarketerHire; 'starting around $10,000' per Flowium listicle

CS2

San Francisco Bay Area, CA, USA (remote-first)

GTM operations framework, marketing operations & automation management, lifecycle/funnel architecture, lead routing & attribution, revenue operations for B2B SaaS

HubSpot · Salesforce · Marketo

Pricing

Contact the agency for pricing.

Email Uplers

Ahmedabad, India (Mavlers group); serves US clients with US phone line +1(817) 631-5135

Email template design & coding (PSD-to-HTML, interactive/kinetic), campaign management, automation management, ESP migration & integration, program audits, dedicated resources/staffing, landing pages, banners

HubSpot · Salesforce · Klaviyo · Marketo · Braze

Pricing

public unit rates on own site: custom email design + code from $159; campaign management from $395; automation management from $549; program audit from $849; ESP migration $50/hour; PSD-to-HTML from $59

Etumos

Seattle, WA, USA (per Crunchbase/founder profiles; not published on site)

Campaign operations, marketing operations & intelligence consulting, campaign execution/demand center, technology implementation & martech migration, tech-stack health audits, agentic marketing/revenue operations

HubSpot · Salesforce · Marketo · Iterable

Pricing

Contact the agency for pricing.

Flowium

New York, NY (Staten Island), USA

Email (Klaviyo-first), SMS, push notifications, WhatsApp, RCS, Instagram DM automation, direct mail; platform migrations; retention strategy for mid-market DTC

Klaviyo

Pricing

not publicly available on own site; $8K–$18K/month per MarketerHire; positioned for $3M–$50M revenue DTC brands

Fuel Made

Seattle, WA, USA

Klaviyo email + SMS (lifecycle strategy, flows, campaigns, creative), Shopify design & development, conversion rate optimization; serves brands $1M–$500M+ revenue

Shopify · Klaviyo

Pricing

not publicly available; 'project-based pricing negotiable' per MarketerHire

GR0

Los Angeles, CA, USA

Email/SMS/push retention (Klaviyo implementation & migration, omnichannel messaging), SEO, content, paid media, creative

Salesforce · Shopify · Magento · BigCommerce · Klaviyo

Pricing

Contact the agency for pricing.

Baltimore, MD, USA

Klaviyo email/SMS management and 'Klaviyo Jumpstart' onboarding, ecommerce web design & development, platform migration, custom integrations, data & segmentation strategy

HubSpot · Shopify · BigCommerce · Klaviyo

Pricing

not publicly available; managed-services retainer, project and hourly consulting models offered (Klaviyo profile)

Homestead Studio

Appleton, WI, USA

Email & SMS retention, paid social, paid search, landing pages; omnichannel growth for DTC

Shopify · Klaviyo

Pricing

not publicly available; '$10K+ minimum' per MarketerHire

Hustler Marketing

Jackson, WY, USA (per Klaviyo directory; fully remote team founded from Europe)

Done-for-you email & SMS (dedicated account manager, designer, copywriter, technical specialist per client), Klaviyo migration/implementation, omnichannel messaging incl. WhatsApp/push, data & segmentation strategy

Klaviyo

Pricing

Contact the agency for pricing.

InboxArmy

Grapevine, TX, USA (2150 W Northwest Hwy, Suite 114-1098)

Email strategy & audits, campaign management, marketing automation, template design & coding, deliverability consulting, ESP evaluation & migration, dedicated resources, SMS, push, white-label email services

HubSpot · Salesforce · Klaviyo · Marketo · Braze · Iterable

Pricing

managed services from $1,500/month (own site); 'starts around $5K/month' per MarketerHire lifecycle listicle

Kenscio

Bengaluru, India

email marketing management, deliverability consulting, marketing automation, personalization, omnichannel campaigns (SMS/WhatsApp/push), CDP/martech services

Pricing

Contact the agency for pricing.

New Breed

Burlington, VT, USA (44 Lakeside Ave, Suite 103)

Demand generation, email/inbound marketing automation, lifecycle & CRM strategy, AI-assisted HubSpot migrations/implementations/integrations, ABM, content/SEO/AEO, web, custom agent development; proprietary Distributely lead-routing app

HubSpot

Pricing

not publicly available; '$8–25K/month depending on scope' per MarketerHire lifecycle listicle

San Diego, CA, USA (9605 Scranton Rd, Suite 700)

Email/SMS retention within full growth stack: Klaviyo implementation & migration, Klaviyo Data Platform work, marketing analytics, SEO, paid media, creative; proprietary 'nova' first-party data tech (Klaviyo profile) and 'Omega' AI operating system (own site)

Klaviyo

Pricing

Contact the agency for pricing.

Ragnarok

New York, NY, USA (per acquisition press + Klaviyo directory index); own Klaviyo partner page says Boston, MA — conflicting

Cross-channel lifecycle strategy, content creation & distribution (email, push, SMS, web, video, social), CRM program audits, personalization, complex flow builds, custom data integrations, web development

Klaviyo · Braze · Iterable

Pricing

Contact the agency for pricing.

Rejoiner

Newport, RI, USA (remote-first; founded in Boston)

Email platform (capture overlays, broadcasts, automated journeys, lifecycle triggers, segmentation, revenue reporting) plus managed services: Strategy Partner (bi-weekly reviews, optimization) and Creative Partner (copy, design, development, deployment); abandonment-revenue and deliverability focus

Klaviyo

Pricing

public: platform from $25/month (up to 1,000 contacts, scales by list size, unlimited emails); Strategy Partner from $1,500/month; Creative Partner custom; SMS $0.015/message + carrier fees; postcards $0.92/card; 10% annual discount; 30-day free trial

Revenue Pulse (RP)

Nepean (Ottawa), ON, Canada (per Datanyze; not published on site)

Marketing operations, campaign operations/support, AI automation, fractional marketing-ops resources, data & analytics

HubSpot · Salesforce · Marketo

Pricing

Contact the agency for pricing.

Sercante (a Trilliad company)

Atlanta, GA, USA

Marketing Cloud Account Engagement (Pardot) and Marketing Cloud consulting, marketing automation implementation & managed services, CRM/Service Cloud, Data 360, Agentforce, data architecture, GTM operations

Salesforce

Pricing

Contact the agency for pricing.

Austin, TX, USA (12400 St HWY 71W, #350-331)

Campaign strategy & planning, segmentation & personalization, SMS & in-app messaging, campaign execution/deployment, email deliverability, content & creative, analytics; plus RevOps (martech stack, CRM/CDP, data architecture), digital product, AI integration

Marketo

Pricing

Contact the agency for pricing.

Newport Beach, CA, USA

HubSpot implementation/onboarding across all hubs, marketing automation & demand generation, email + SMS campaigns, RevOps & integrations, Klaviyo-run ecommerce retention, web/CMS development, AI services

HubSpot · Shopify · Klaviyo

Pricing

not publicly available on own site; 'typically starts around $10K/month' per MarketerHire lifecycle listicle

Sticky Digital

San Diego, CA, USA (fully remote team)

Full-service email + SMS, retention strategy, conversion rate optimization, Shopify tech-stack development, complimentary Klaviyo migrations

Shopify · Klaviyo

Pricing

Contact the agency for pricing.

The Email Marketers

Santa Monica / Los Angeles, CA, USA

Email & SMS strategy, campaign management, lifecycle automations, list growth, creative/copy, deliverability & spam prevention, subscriptions, direct mail, referral & loyalty programs

Klaviyo · Braze

Pricing

Contact the agency for pricing.

Tinuiti

New York, NY, USA

Email/SMS lifecycle & CRM (practice built on 2018-19 Email Aptitude acquisition), Klaviyo implementation & migration, AI strategy & automation audits, plus commerce, search, social, TV & audio media

Shopify · Magento · BigCommerce · WooCommerce · Klaviyo

Pricing

Contact the agency for pricing.

Underground Ecom

London, UK (103 Farringdon Rd, EC1R 3BS); US listed as additional location in Klaviyo directory

CRM audit & roadmap, CRM/retention strategy, creative & execution for email/SMS/owned channels, automations & flows, SMS & WhatsApp management; targets 8-10-figure ecommerce brands

Klaviyo

Pricing

Contact the agency for pricing.