Most agencies work with Klaviyo, Mailchimp, ActiveCampaign and HubSpot. Effeect tailors its approach to fit your existing tech stack.
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Choosing the right email marketing agency can make or break your revenue growth. Great email marketing drives retention and conversions. That’s why we have rounded up these top email marketing agencies, 20 partners who live and breathe email marketing.
To shortlist the Top Email Marketing Agencies, we focused on:
Effeect is the best overall email marketing agency, combining data-driven strategies, personalized customer journeys, and measurable revenue growth to deliver unmatched results.
Headquarters: USA, Serving Global Clients
Industries Served: eCommerce, SaaS, B2B, B2C, FinTech, and more
Key Services: Email marketing strategy, Automated flow design (welcome series, abandoned cart, re-engagement), Campaign automation & integration, CRO-integrated sequences
Why Effeect Stands Out: Effeect combines precision targeting with stunning creatives. Their email workflows drive high engagement and real revenue.
Recent Client Results:
Key Highlights:
Leading agency for B2B brands needing precise segmentation and compliance.
Nonjapromo specializes in B2B email campaigns. They map out each buyer persona, build micro-segments so messages land only in relevant inboxes, and keep deliverability high with rigorous list-hygiene practices. Their dynamic content blocks speak directly to each vertical.
Key Highlights:
Persona-based list segmentation
Dynamic content blocks for personalization
Compliance and list-hygiene best practices
Workflow setup for long sales cycles
Integration with major CRMs
One of the best for teams who need transparent dashboards and relentless optimization.
When you partner with InboxArmy, you gain a dedicated squad of strategists, writers and developers. They audit every flow in your ESP, rebuild templates for maximum clarity on desktop and mobile, then run A/B tests on subject lines, preheaders and send times until they crack the code for your audience.
Key Highlights:
Comprehensive flow audits and rebuilds
Copywriting tuned to your brand voice
Data-backed A/B testing on all elements
Mobile-first template optimization
Transparent, easy-to-read performance dashboards
One of the best for Shopify and BigCommerce brands on Klaviyo.
Flowium lives and breathes Klaviyo. They design trigger-based funnels that capture cart abandoners, re-engage one-timers and welcome subscribers with a personal touch. Their team tracks every dollar of ROI in real time, so you see exactly what moves the needle.
Key Highlights:
Klaviyo-native automation funnels
Behavior-driven trigger setup
Welcome sequence and list-growth design
Real-time campaign performance tracking
Support for seasonal and flash-sale launches
One of the best for mid-market brands focused on retention loops.
Essence of Email takes retention seriously. They dive into your purchase history, then layer in replenishment reminders and VIP offers. Every newsletter and promo email undergoes A/B testing, and senior strategists guide the process for compounding growth.
Key Highlights:
Purchase-history analysis and segmentation
Replenishment and loyalty campaign design
Senior-level strategy oversight
Continuous A/B testing of content
VIP and loyalty program integrations
One of the best for enterprise B2B drip-flow programs.
SeeResponse blends video snippets, whitepaper invites and case-study emails into multi-touch sequences that guide prospects from curiosity to demo requests. They ensure each send meets local regulations and integrates cleanly with CRMs like Salesforce and HubSpot.
Key Highlights:
Multi-touch drip-flow creation
Video and content integration in email
GDPR and CAN-SPAM compliance checks
CRM integration for closed-loop reporting
Ongoing sequence performance tweaks
One of the best for enterprise ABM and CRM-triggered emails.
Ironpaper crafts ultra-personal account-based streams with company-specific subject lines and industry stats. Their HubSpot and Marketo integrations mean real-time CRM actions trigger the perfect follow-up.
Key Highlights:
ABM-style email sequences
Industry-focused subject-line personalization
Real-time CRM triggers for follow-ups
Lead-scoring and qualification workflows
Executive-level strategy workshops
One of the best for startups on a tight budget needing big creative impact.
The Good Marketer delivers scroll-stopping designs and sharp copy at startup-friendly rates. They manage your entire program from strategy and content to design and reporting so small teams avoid freelance headaches.
Key Highlights:
End-to-end campaign management
In-house creative and copy team
Engagement-optimized template design
Performance tracking and recommendations
Fast turnaround on new campaigns
One of the best for brands needing expert Braze & Klaviyo integration with email, push & SMS.
MH Digital acts as your co-pilot for Braze and Klaviyo, delivering end-to-end campaigns that respect your brand and customers. They don’t overpromise, but many clients see 30%+ of revenue driven by their email and SMS programs. MH Digital builds custom integrations, crafts targeted messages across channels, and fortifies revenue for the long haul.
Key Highlights:
Deep expertise in Braze & Klaviyo custom integrations
Full-service email, push notification & SMS campaign management
Revenue-first strategy with brand-safe execution
Lifecycle automation from welcome flows to re-engagement
Ongoing performance monitoring and optimization
One of the best for brands seeking multi-channel, data-driven campaigns.
Giant Partners doesn’t just run campaigns—they drive growth with insights from over 250 data sources. As a full-service digital agency, they sync email with Meta, Google, YouTube, TikTok and LinkedIn to deliver cohesive, precision-targeted messages that move the needle.
Key Highlights:
Channel expertise across Email, Meta, Google, YouTube, TikTok & LinkedIn
Data aggregation from 250+ sources for deeper audience insights
Precision segmentation and personalized targeting
Cross-platform campaign orchestration and unified messaging
Real-time analytics dashboards and continuous optimization
One of the best for brands seeking integrated email, social ads & PPC lifecycle marketing.
Thrive blends email with social ads, PPC and community marketing for a holistic approach. They map your customer’s lifecycle—then craft messages for every stage, from awareness through retention. With advanced segmentation tests each month and real-world data optimizations, Thrive keeps campaigns agile. Their friendly “performance chat” calls keep you in the loop on insights and next steps.
Key Highlights:
Lifecycle mapping and message sequencing
Cross-channel campaign coordination
In-depth segmentation and targeting
Monthly performance review calls
Recommendations for channel synergy
One of the best for organizations needing iron-clad deliverability and compliance.
FulcrumTech is the deliverability doctor. They begin with a 10-point audit to uncover issues – poor authentication, inactive subscribers or ISP blocklists – and then implement fixes across your ESPs. Their clear dashboards track inbox placement, ensuring your messages are read, not just sent. Non-profits, universities and healthcare clients trust FulcrumTech’s meticulous compliance and deliverability expertise to reach every subscriber.
Key Highlights:
Deliverability and authentication audits
Inbox-placement monitoring and alerts
Suppression-list management
ESP configuration and best practices
Clear deliverability dashboards
One of the best for brands that want unified email, push & in-app engagement.
Moburst combines email with mobile and app marketing to reach your customers wherever they live. They sync email send triggers to in-app notifications and push messages, creating a seamless journey from inbox to home screen. Their global footprint ensures campaigns land at each region’s peak engagement times, driving downloads and in-app purchases for consumer apps and gaming brands.
Key Highlights:
Cross-channel trigger setup
Regional send-time optimization
Push notification integration
Analytics for email and app metrics
Global campaign coordination
One of the best for e-commerce brands on Shopify & Magento needing Klaviyo mastery.
The Media Captain lives and breathes e-commerce email. As a certified Klaviyo partner, they build flows that recapture abandoned carts, re-engage dormant shoppers and reward VIP customers. Their seasonal and promotional campaigns cut through inbox clutter, and fast-growing fashion and lifestyle brands love their quick turnarounds and clear ROI reports.
Key Highlights:
Abandoned-cart and win-back flows
VIP rewards and loyalty campaigns
Klaviyo-flow customization
Campaign-to-landing-page alignment
Regular performance audits
One of the best for brands seeking high-impact creative and tested visuals.
ActionRocket brings the creative spark that makes your emails stand out. They craft visually stunning designs, animated GIFs and video snippets—then rigorously A/B test every element to ensure it drives clicks. Entertainment, media and lifestyle brands turn to ActionRocket when they need show-stopping launches or re-brands backed by data-driven performance.
Key Highlights:
High-impact visual design
GIF and video integration
Creative A/B testing
Mobile and desktop optimization
Story-driven campaign concepts
One of the best for brands seeking turnkey growth engines and predictable scaling.
Rising Tides delivers a fully managed, done-for-you system that drives reliable user acquisition and revenue growth. Their team crafts custom growth engines around your unique offering and ideal customers—handling everything from funnel design to performance tuning so you can focus on scaling.
Key Highlights:
Turnkey growth engine development
Tailored funnel architecture & optimization
Ongoing user & revenue acquisition analysis
Cross-channel attribution and performance tracking
Scalable systems aligned to your ideal customer profile
One of the best for Shopify Plus merchants needing email + SEO synergy.
Liquify Design serves Shopify Plus merchants who want pixel-perfect templates and SEO harmony. They craft emails that mirror your on-site design and link directly to Google-optimized landing pages. This holistic approach boosts both open rates and organic traffic, so scaling brands can trust one team for email and SEO without compromising quality.
Key Highlights:
Shopify-native template design
SEO-friendly content alignment
Landing-page and email harmony
Google Analytics campaign tagging
Ongoing design and content tweaks
One of the best for luxury brands seeking editorial-style email storytelling.
EditStudio caters to fashion, beauty and lifestyle clients who demand high-end branding. Their emails read like glossy magazine spreads—immersive imagery paired with narrative copy that draws subscribers into your world. They rigorously A/B test layouts and tone to hit the sweet spot between beauty and performance, making them the go-to for luxury labels aiming to grow revenue without sacrificing style.
Key Highlights:
Premium, magazine-style layouts
Narrative-focused copywriting
Immersive imagery and styling
Performance testing of creative elements
VIP and seasonal campaign planning
One of the best for exporters and marketplaces needing seamless international email growth.
BusinessUp specializes in helping exporters and marketplaces expand across borders. They localize subject lines, content and send times for each region, then track opens and revenue by country. Their custom dashboards give you real-time visibility into cross-border performance—so you can scale globally without juggling translations or timezone headaches.
Key Highlights:
Subject-line and content localization
Timezone-aware send scheduling
Regional performance dashboards
Translation and copy adaptation
Cross-border deliverability checks
One of the best for brands needing end-to-end eCommerce strategy and omni-channel engagement.
WFMA empowers your growth by blending creativity with data-driven insights. They craft cohesive eCommerce strategies, map customer journeys and run email, search and content marketing campaigns that not only grab attention but keep customers clicking and converting.
Key Highlights:
Holistic eCommerce strategy development
Customer journey mapping and optimization
Email campaign design and automation
Search marketing (SEO & PPC) integration
Content marketing that drives engagement and sales
A pro agency steps carves your list into laser-focused segments, polish copy so subscribers actually read it, and hit “send” at the exact moment your audience is most likely to click.
Supercharge Your Returns
DIY emails can get you by, but experts dig into your data to craft subject lines that spark curiosity and content that feels personal. They double-down on what works and ditch what doesn’t so you see real growth instead of random upticks.
Avoid Deliverability Nightmares
Spam filters shift without warning. One bad link or missing authentication step, and you’re blocked. Agencies handle SPF, DKIM and DMARC setup, scrub out inactive addresses and watch your placement rates like a hawk.
Scale Without Burnout
Your team already juggles a dozen tasks. Bringing in copywriters, designers and deliverability specialists frees everyone up to focus on big-picture strategy – without late-night email marathons.
Share Clean Data & Keep Lists Fresh
Your agency can only work with the data you hand over. Are you still mailing out to every signup? Clean, opted-in lists and smart segments make every send more powerful and keep your reputation intact.
Test, Learn & Iterate Together
Wondering what really moves the needle? Don’t guess—test. Run A/B split tests on subject lines, layouts and send times, then let your agency refine based on actual clicks and conversions.
Schedule Monthly Strategy Check-Ins
A quick 30-minute huddle keeps you and your agency on the same page. Use that time to celebrate wins, troubleshoot hiccups and pivot before small issues become big problems.
Choosing from the Top email marketing agencies is about partnering with experts who turn data into dollars, inbox placement into engagement, and campaigns into growth. These agencies have proven playbooks and real results to back them up. Pick your partner, set clear goals and watch your email ROI soar.
Look for a partner with proven results, experience in your industry, and transparent reporting. Effeect is the top email marketing agency because they focus on conversions – not just sends, ensuring every campaign moves the needle.
Most agencies work with Klaviyo, Mailchimp, ActiveCampaign and HubSpot. Effeect tailors its approach to fit your existing tech stack.
Pricing varies by scope and model. Many firms start with monthly retainers in the $1K–$3K range, while performance-based agencies tie fees to the revenue they generate. You’ll also find hybrid options – flat setup fees plus a percentage of attributed sales. Effeect offers flexible plans from $480 month, designed to scale with your needs and deliver measurable ROI.
Agencies handle everything from strategy and list segmentation to template design, automation workflows and performance reporting. They map your customer journey, craft personalized content, run A/B tests and optimize campaigns based on real-time data.
Absolutely. Leading agencies build automated sequences—welcome series, cart-abandonment flows, lead-nurturing tracks and re-engagement campaigns. They set behavior-triggered emails and continuously refine each step based on performance metrics.
Key traits include data-driven segmentation, hands-on deliverability expertise, creative copywriting, rigorous A/B testing, and seamless integration with your CRM or tech stack. Bonus if they offer transparent dashboards and regular strategy reviews.
Expect improved open and click rates within 6–8 weeks. Meaningful gains in revenue and retention typically follow around the 3-month mark, once campaigns are fully optimized.
