11 Best Email Marketing Software for Agencies in 2025 (and how to choose one)

Offering email marketing services to clients? Don’t just default to the biggest names!

Why stick with tools full of features you’ll never use, when you could choose something simpler that still gets results?

Each email marketing software has its sweet spot, with a mix of features designed to suit different types of clients and campaign goals. Using the right one for your agency’s needs can save your team time, minimize frustration, and even save money (no more overpaying!)

Below, we’ll explore what each one does best to help you find the right fit for your agency, no matter how varied your clients’ needs and industries are

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Summary of best email marketing software: agency edition

A round-up of the best email marketing software to help you deliver smarter, faster results for clients:

Best email marketing software

• For e-commerce: Klaviyo, Drip
• For enterprises: Braze
• For small businesses: Mailchimp
• For creators: Kit
• For beautiful designs and templates: Campaign Monitor
• For email marketing automation: ActiveCampaign, Drip, Omnisend
• For interactive emails: Mailmodo
• Best all-rounder: Constant Contact
• Best value for money: Brevo

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TL;DR in one sentence

1. Klaviyo: For e-commerce businesses that benefit from sophisticated customer segmentation, behavior-driven marketing analytics, and automation.
2. Braze: For enterprises that want to optimize for and turn engagement into revenue.
3. Kit (formerly ConvertKit): For creators and small businesses who want a simple-to-use yet effective email marketing platform.
4. ActiveCampaign: Robust, flexible marketing automation with AI.
5. Drip: E-commerce email automation and segmentation. 
6. Mailchimp: For small businesses that prioritize simplicity and ease of getting started.
7. Brevo: Best for agencies looking for an all-in-one marketing platform without the enterprise price tag.
8. Campaign Monitor: Best for design-focused agencies that prioritize visual excellence and need robust client management features. 
9. Constant Contact: Best easy-to-use email marketing tool and multichannel campaigns (including social media) across multiple clients. 
10. Mailmodo: Best for immersive, interactive email experiences that drive conversions and engagement.
11. Omnisend: Best for streamlined, high-conversion automation for ecommerce clients running multi-channel campaigns (email, SMS, push notifications, retargeting contacts).

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#1. Klaviyo: For relationship-driven e-commerce brands

Klaviyo is best known as Shopify’s recommended email partner, but the platform has sophisticated B2C CRM features and lots of integrations that make it a powerful ally for ecommerce brands. It combines email marketing, marketing automation, and a customer data platform (CDP) for relationship-driven brands to leverage customer insights in one app.

However, these advanced capabilities come with an increased learning curve, and the cost for larger email lists escalates more quickly than lighter, less data-focused platforms. 

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Key features

• 350+ integrations, including major e-commerce platforms (Shopify, WooCommerce, BigCommerce, Magento, Wix, Square Online, etc).
• Drag-and-drop components to easily create dynamic emails and forms. 
• Klaviyo AI with machine learning capabilities and predictive analytics.
• Complex customer segmentation 
• Behavior-driven marketing automations that respond to real-time behavior and data, including conditional splits and trigger splits.
• 60+ pre-built, automated flows for campaigns, customer journeys, and responses, including price drop reminder and back-in-stock reminders. 
• Klaviyo Data Platform is built into their B2C CRM for unified customer profiles and enhanced by Klaviyo AI—no syncing with third-party tools required.
• Cross-channel marketing with email, SMS, and push notifications.
• Webhooks to add processes from other apps and servers to automatically trigger processes.

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Klaviyo pricing

Pricing for 1501 to 2500 active profiles*: 

• Email only: $60/month for up to 25,000 emails.
• Email marketing + SMS: From $75/month.

Note: Paid add-ons include reviews, advanced marketing analytics, and Klaviyo Data Platform.

*Active profiles are Klaviyo's term for email contacts, subscribers, and people who engage with your messages.

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#2. Braze: Enterprise-level customer engagement platform

Braze is an enterprise-level customer engagement platform with omnichannel marketing features targeted at mobile marketing and mobile-first campaigns. Think advanced analytics for segmenting and targeting mobile users, Braze Data Platform, and funnel drop-off reporting. 

Braze helps brands to engage customers where they’re at—on smaller screens and devices—and maintain a cohesive, on-brand experience, no matter the channel. Trusted by global brands with its reliability and deliverability, Braze boasts its “sub-second latency, regardless of your data and send volumes.” 

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Key features

• Advanced personalization with AI to test and optimize campaigns to strengthen brand relationships.
• Flexible audience segmentation with 100+ filters or use plain text prompt without technical knowledge.
• Powerful reporting and analytics that meet global privacy and security requirements.
• BrazeAI™ includes features like Predictive Suite to target those most likely to convert, AI item recommendations, and recreate winning experiences and campaigns.
• No-code journey orchestration with Canvas Flow to quickly execute, iterate, and scale.
• Cross-channel messaging across email, SMS, in-app, website, push notifications, WhatsApp, and more. 

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Braze pricing

• Pricing is only available on request. 

An online source states that Braze’s pricing starts from $60,000/year.

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#3. Kit.com: For creators to monetize their audiences

Formerly known as ConvertKit, they’ve rebranded to Kit in 2024 to reflect their growing feature list and reposition as an email platform built for the creator economy. 

It’s not just for content creators, bloggers, podcasters, course creators, streamers, and digital entrepreneurs; authors, subject matter experts with an online following, musicians, actors, and entertainers are also part of their creator community.

Kit’s promise is a simple and effective email marketing software to help creators grow and monetize their social following. The user-friendly interface is easy for solopreneurs to get started, even if you’re not tech-savvy or if it’s your first time sending out a newsletter. 

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Key features

• The Kit App Store is a creator-centric app ecosystem that’s a combination of integrations and widgets you can install within your “kit.”
• A Creator Network to find opportunities to cross-promote content and find influencers.
• Features for independent creators to launch a pre-order landing page, build hype for an event or product, sell digital products, and offer subscriptions. 
• Marketing automation that’s visual (i.e., drag-and-drop) and requires zero technical knowledge.
• Generous free plan for sending newsletters to up to 10,000 subscribers to build an audience.

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Kit pricing

All Kit plans have unlimited email sending. For 3000 email subscribers, these are the subscription prices (paid yearly):

• Newsletter: Free (For up to 10,000 subscribers)
• Creator plan: $41/month for two users
• Creator Pro plan: $66/month for unlimited users

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#4. ActiveCampaign: For powerful, flexible marketing automation with AI

ActiveCampaign positions itself as an autonomous marketing platform that “figures out the next best move, aligns it to your goals, and then does it for you.” If you aren’t already using your own AI agents for marketing work, you’ll get to experience them here with the Active Intelligence feature. The interface is conversational, so there’s no code or technical expertise needed to set up complex automation workflows with precise targeting and sophisticated triggers.

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Key features

• Active Intelligence: AI-driven execution, optimization, and insight. It continuously learns and adapts based on results and data points.
• AI agents that build fully realized campaigns, personalize content, segment audiences, and create branded content via conversational chats in plain language.
• 900+ marketing automation templates, including pre-built customer journey maps.
• 250+ pre-built templates and a drag-and-drop email builder.
• 94% deliverability rate (higher than Mailchimp and Hubspot).
• Predictive and conditional content that adapts based on customer data.
• Cross-channel marketing with email, SMS, WhatsApp, social, and ad audiences.
• Agencies can become ActiveCampaign partners to unlock white labelling, billing flexibility, and earn commissions on referring clients or reselling subscriptions.

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ActiveCampaign pricing

Pricing for email marketing and 2,500 contacts starts at:

• Starter plan: $39/month for one user
• Plus plan: $95/month for one user
• Pro plan: $149/month for three users
• Enterprise: $255/month for five users

🔗 Want to explore more ways to use AI across your marketing workflows? Check out our list of the best AI tools for marketing agencies.

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#5. Drip: For behavior-driven workflows optimized for e-commerce

Drip is behavior-driven email marketing software that’s known for its e-commerce automation and segmentation capabilities. With an outstanding deliverability rate, hyper-customized emails and forms, Drip makes it easy for B2C businesses to deliver significantly higher engagement and revenue through personalized email flows.

Brands can tap into onsite pop-ups (AKA email pop-ups) to guide first-time visitors towards being potential customers—all fully integrated with email workflows. The drag-and-drop designer makes it easy to create a lead generator that’ll grow an email subscriber list, host giveaways, or run promotions with a countdown timer.

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Key features

• Pre-built email automation workflows for various industries.
• World-class deliverability @ 99.8%—one of the highest around.
• Intuitive, visual email builder that’s easy to use, or choose from 50+ professionally designed ecommerce email templates.
• E-commerce integrations with Shopify, WooCommerce, BigCommerce, or use their API for custom online stores.
• On-site pop-ups and messaging with a flexible and customizable builder. Choose from embedded, slide-in, side bar, or sticky bar placements.
• The Drip Agency Program comes with a partner badge, demo account, commission, and a featured link from their website (for higher partner tiers).

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Drip pricing

Drip has transparent pricing that’s based on the number of email contacts.

• 2500 contacts: From $39/month
• 5000 contacts: From $89/month
• 10,000 contacts From $154/month

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#6. Mailchimp: For SMBs, E-Commerce, and Non-Profits

Mailchimp is an all-in-one, simple marketing platform for agencies to scale email, social, and digital campaigns for their clients. It’s versatile and easy to use for a diverse range of clients, from e-commerce to non-profits. The dependable platform works well for agencies that prioritize ease of use and reliable functionality. 

However, clients who rely on long, multi-touch nurture journeys and CRM-native automation won’t find Mailchimp ideal. Designed with ease of use for small and medium businesses in mind, it falls short on advanced capabilities such as lead scoring and cross-channel attribution reporting, which are often essential for complex marketing campaigns.

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Key features

• Comprehensive marketing automation to personalize customer journeys, send trigger-based emails, and dynamic automated messages.
• AI-powered predictive segments for improved targeting and insights.
• 300+ integrations, including major CRMs and e-commerce platforms.
• Intuitive drag-and-drop email builder with an extensive template library.
• Built-in A/B testing and advanced reporting capabilities.
• AI growth assistant to create personalized content and campaigns at scale, and get suggestions on what to improve based on email analytics.
• Mailchimp & Co membership circle for agencies. Earn Mailchimp Pro Partner status and unlock an official partner page and a listing in the Experts Directory.

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Mailchimp pricing

Mailchimp’s starting prices are based on the number of contacts you need. For 2500 contacts, paid plans start from:

• Essentials plan: For up to 500 contacts—$13/month for 3 users with limited reporting, analytics, and automation flows. No generative AI or custom-coded templates. 
• Standard plan: $60/month for 5 users.
• Premium plan: $350/month for unlimited users and 10,000 contacts.

*Mailchimp sometimes runs promos for new users.

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#7. Brevo: All-in-One Marketing Software with Agency-Friendly Pricing

Brevo stands out with its email-based pricing model (rather than contact-based) and robust AI features. It’s not just email; they’re an all-in-one marketing platform that also combines SMS, WhatsApp, CRM, marketing automation, landing pages, forms, and transactional messaging. 

Their generative AI features are particularly powerful, making it a good option for agencies planning on leveraging artificial intelligence heavily into email copywriting and management. The platform is also great for teams that need comprehensive marketing automation without enterprise-level pricing.

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Key features

• 50+ free email templates in a drag-and-drop editor.
• Aura AI for copywriting and predictive sending for optimal email delivery timing.
• 150+ integrations, including CRM and sales pipeline management.
• Transactional email capabilities.
• 99% deliverability rate. 
• Detailed performance and deliverability analytics with some plans, including open rates, click rates, bounces, and click heatmaps..
• Agency program for digital agencies and consultants with varying tiers of incentives and a centralized multi-account dashboard. Higher partner tiers get a listing in the Agency Directory, co-marketing initiatives, and more.

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Brevo Pricing

Base plan prices start low, with the option of add-ons for features such as additional users, landing pages, and dedicated IP. These are the annual prices for one account:

• Free plan: Free.
• Starter plan: $8.08/month.
• Business plan: $16.17/month with the features that agencies need.‍
• Enterprise plan: Custom pricing.

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#8. Campaign Monitor: Premium Templates with Agency Tools

Campaign Monitor delivers premium email marketing with standout design and agency-friendly tools. Its multi-client dashboard, white-labeling, and client billing streamline account management, while 100+ professional templates and powerful branding controls make it ideal for design-driven campaigns. Seamless integrations with major CRMs and e-commerce platforms—including Salesforce, WordPress, Shopify, Unbounce, and Intercom—fit right into agency marketing tech stacks.

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Key features

• Choose from 100+ professionally designed email templates, or instantly get a custom template created with your website logo, colors, and type.
• Simple drag-and-drop design tools and customizable signup forms.
• Advanced A/B testing capabilities beyond basic subject line testing.
• Agency management dashboard with client oversight tools.
• Manage billing per client, even in different currencies.
• Campaign Score tells you what’s working (or not), with personalized recommendations on how to improve.
• Transactional email options, including in-depth insights.
• Marketing automation for customer journeys, dynamic content that’s personalized and timely, time zone sending, and send time optimization.
• Combine email marketing with SMS.
• Role-based permissions for secure client account management.
• Industry-leading deliverability rates (above 99%).

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Campaign Monitor pricing 

Prices based on 501 to 2500 contacts for an annual subscription:

• Lite plan: $39.60/month 
• Essentials plan: $62.10/month with unlimited email sends and automated emails. 
• Premier plan: $152.10/month with advanced, pre-built engagement segments and link tracking.

*Add-ons are available at an additional cost: Non-human click filter, engagement segments, countdown timer, and time zone sending.

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#9. Constant Contact: Analytics Powerhouse and Events Management

Constant Contact is an easy-to-use email marketing software with exceptional analytics capabilities, marketing automation, and built-in event management tools. It even offers social posting and reporting to Facebook, Instagram, and LinkedIn on all plans. The platform provides a comprehensive social media marketing integration, making it particularly valuable for agencies managing clients with diverse marketing needs.

The Agency Partner Program gives your agency exposure to thousands of potential clients, sign-up bonuses, 18% referral commission, and a centralized portal to manage multi-client campaigns. The platform excels for agencies serving nonprofits, associations, or event-based businesses.

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Key features

• Simple email automation setup with premade templates for welcome and thank you email series, shopping cart abandonment, and trigger-based campaigns. 
• Built-in lead generation and engagement tools: surveys, polls, lead capture forms, and landing pages.
• AI content generator to write all your emails, social posts, texts, and landing pages. It’ll also create a marketing plan for you in minutes.
• Analytics and reporting with detailed performance metrics, engagement reports, campaign comparison, click-tracking heat map, click segmentation, and mobile open rates.
• Event management capabilities for webinars and in-person events.
• Social media tools: schedule posts for Facebook, Instagram, and LinkedIn, Meta and Google ads, and turn emails into social content in a few clicks.
• 300+ integrations, one of the highest around, including comprehensive business tool connectivity across ecommerce, CRMs, sales, lead generation, design, and accounting.
• Connects to ecommerce platforms like Shopify, Wix, and Squarespace to automate targeted messages, insert products into emails, and generate product recommendations.
• 97% email deliverability rate.
• SMS marketing (for US customers only).
• Mobile app that allows you to check reports and work on the go.

🔗 Want to level up your analytics across all campaigns? Check out our guide to the best agency reporting software.

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Constant Contact pricing 

Annual pricing for 1001 to 2500 contacts:

• Lite plan: $50/month.
• Standard plan: $75/month with basic marketing automation.
• Premium plan: $150/month with industry-leading automation and segmentation features.

🔗 Related article: Best Social Media Management Tools for Marketing Agencies

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#10. Mailmodo: Interactive AMP Email Specialist

Mailmodo differentiates itself by enabling interactive AMP emails that allow recipients to complete actions like form submissions, bookings, and purchases—without leaving the email. They also offer exceptional segmentation features, including the option to create audience segments with AI’s assistance. Are building automated email sequences and triggered campaigns too complex in other tools? You can do it visually in Mailmodo. 

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Key features

• Intuitive, modern interface and UX.
• Interactive AMP email templates with in-email form submissions and bookings. No developer or coding required.
• E-commerce capabilities embedded directly in emails (shopping carts, checkout).
• 30+ prebuilt smart automation workflows with behavioral triggers, such as cart abandonment, milestones, and lead nurture sequences.
• Mailmodo AI to create emails, optimize subject lines, and review email copy.
• API access, webhooks, and integrations with major e-commerce platforms.
• Survey and feedback collection tools that work within the email interface.
• Use prebuilt segmentation options based on triggers, engagement data, website, and app behavior. The dynamic segments or cohorts update automatically.

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Mailmodo pricing

Annual pricing based on 2500 contacts:

• Lite plan: $39/month for 1 user.
• Pro plan: $79/month for 3 users. Includes advanced integrations, A/B testing, send time optimization, and email click maps.
• Max plan: $159/month for 5 users with all integrations and the ability to export campaign data via API. 

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#11. Omnisend: E-commerce Multi-Channel Marketing

Omnisend has exceptional features for ecommerce businesses, with multi-channel marketing combining email, SMS, and push notifications. They have strong personalization options, which can increase campaign success rates. The platform includes all features across all pricing tiers, with differences mainly in sending volumes and contact limits. We find it particularly suitable for agencies managing Shopify-based businesses or online retail clients.

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Key features

• Multi-channel automation workflows combining email, SMS, push notifications, and retargeting contacts on Google and Facebook.
• Advanced customer segmentation with purchase behavior tracking.
• Omnisend AI suite with generative AI features, intelligent segmentation, high-value customer finder, and dynamic personalized content.
• Product recommendation engine powered by browsing and purchase history.
• Cart recovery sequences with customizable timing and incentives.
• Integrated SMS marketing features. 
• Dynamic discount codes.
• Pre-built ecommerce workflows and automation.
• Built-in popups, landing pages, forms, and widgets like ‘Wheel of Fortune’ and teasers.
• Advanced reports for sales performance and campaigns.

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Omnisend pricing

Monthly pricing based on 2001 to 2500 contacts:

• Standard plan: From $30.80/month. Max 30,000 emails a month.
• Pro plan: From $41.30/month. Unlimited emails, advanced reporting, and a personalized product recommender.

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How to choose the best email marketing software

Choosing the right email marketing software comes down to how you plan to use it. Here’s how to narrow down your options:

1. Start with your own (or your client’s) goals

Before comparing tools, get clear on what success looks like. Are you trying to drive online sales, nurture leads, or keep existing customers engaged? Your main goal will determine which features to prioritize.

2. Check the non-negotiable features you need

The best email marketing software (for any business type) will offer:

• High deliverability: Reliable inbox placement, DKIM/SPF setup, and spam testing. Without these, even your best campaigns can end up in spam folders, hurting open rates and wasting your team’s effort.
  
  
• Automation & segmentation: Visual workflows, tagging, and behavior-based triggers. These let your agency run personalized campaigns at scale, saving time on repetitive tasks and improving targeting.
  
  
• Integration options: Smooth connections to CRMs, e-commerce stores, and booking tools. When your software doesn’t integrate well, data gets scattered across platforms, making it harder to track results or automate tasks for each client.
  
  
• Analytics & attribution: Real-time reports on opens, clicks, conversions, and revenue. These insights help your agency prove ROI and refine strategies across clients.
  
  
• Ease of use: Intuitive design, responsive templates, and solid customer support. Clunky tools only slow projects down and frustrate both your team and clients.
  
  
• Scalable pricing: Flexible plans that grow with your client base ensure that you’re not overpaying early on or forced to switch platforms as your agency takes on more clients.

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Once those basics are covered, you can focus on features that match your client type.

🛍 Email marketing features for e-commerce clients

E-commerce brands rely on data-driven automations to boost sales. This means that your software should let you use customer behavior and purchase history to personalize every message.

Look for:

• Native integrations with Shopify, WooCommerce, or BigCommerce
  
  
• Prebuilt flows (abandoned cart, post-purchase, re-engagement)
  
  
• Product feed insertion and personalized recommendations
  
  
• Revenue attribution dashboards and predictive analytics
  
  
• A/B testing for subject lines, products, and send times

💼 Email marketing features for service-based clients

Service-based businesses rely on relationship-building and lead nurturing, not one-off sales. This means that your tool should combine email marketing with CRM and automation features to simplify how you communicate with clients.

Look for:

• CRM integration (HubSpot, Pipedrive, Salesforce)
  
  
• Smart personalization that adapts emails to each recipient
  
  
• Onboarding and follow-up automations
  
  
• Appointment scheduling or booking integrations
  
  
• Strong deliverability and clear reporting

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💡 Quick tip: If your agency works with both types of clients, go for a platform that offers sub-accounts or workspaces. This way, you can manage multiple client accounts securely without mixing data or logins.

🔗 Want to learn more about improving your agency tech stack? Check out our post on the best tools for agency operations.

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‍Frequently Asked Questions (FAQs)

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Which email marketing platforms make it easy to manage multiple clients?

ActiveCampaign, Campaign Monitor, and Brevo include dedicated agency dashboards or multi-account setups. They let you switch between client accounts easily while keeping data and billing separate.

How can I show ROI to my clients?

Choose a platform with strong analytics and reporting. Tools like Constant Contact, Klaviyo, and Mailchimp let you share or white-label reports showing open rates, conversions, and revenue attribution, so you can easily prove the value of your work.

What’s the most affordable option if I’m just starting my agency?

If you’re working with a small client base, Brevo or Kit are budget-friendly and simple to use. They have all the essentials (automation, templates, and basic reporting) without enterprise-level pricing.

What’s the best software if I want to scale my agency?

If you’re growing fast, ActiveCampaign, Brevo, and Braze are built for scale. They offer automation, API integrations, and flexible pricing for agencies managing many clients or large contact lists.

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⚡️Agency Hack: Automating access requests for client onboarding

Once your email and marketing tools are in place, the next step is onboarding your clients— and that usually starts with getting access to their accounts. 

But as you probably know, getting access to client social media and marketing assets can quickly turn into a tedious back-and-forth. 

Leadsie is a client onboarding software that simplifies requesting and giving access to marketing assets, social media, and ad accounts with one secure link. Get access to your clients' or influencers' Facebook, Instagram, Google, TikTok, Shopify, LinkedIn, and other accounts without sharing passwords.

Leadsie automates access management to deliver a fast, secure, and seamless onboarding experience— helping you impress clients and showcase professionalism from day one.

✅ Minimize frustrating chaser emails and calls for access

✅ Reduces your agency's turnaround time by over 50%

✅ Scales with your agency as you grow beyond onboarding 5-10 new clients a week

✅ Makes it possible to get access to 13+ social, marketing, and analytics platforms at once

✅ Start billable work and billing cycles for your new clients without delays

🎁 Try a free 14-day trial on us—no credit card needed!

P.S. It's risk-free and you get to keep the account connections after the trial ends. 🙌