17 minute read time

We Reviewed 11 Email Marketing Platforms for Agencies — Here’s Our Top Pick

campmonauthor - Jan 14, 2026

Managing email marketing for multiple clients can quickly become overwhelming without the right platform.

After reviewing email marketing tools specifically for their agency capabilities, we’ve identified the top solutions that actually understand multi-client workflows, white-label needs, and scalable pricing structures.

Disclaimer: The features, pricing, and details mentioned for each product are current as of October 2025 and may have changed since then.

Ready? Let’s dive in.

TL;DR: Email marketing software for agencies at a glance

If you want a broader comparison of agency-ready tools, check out our full guide on the best email marketing software for agencies.

1) Campaign Monitor – The #1 Email Marketing Platform for Agencies Right Now

Rating: 4.2/5 (2,000+ reviews)

Campaign Monitor stands out as the premier choice for agencies with its purpose-built agency features and decade-plus track record of serving marketing professionals.

The platform offers an intuitive drag-and-drop builder combined with enterprise-grade client management tools that make scaling agency operations seamless.

Campaign Monitor vs. Standard Email Platforms: Key Differences

Switchback Email Marketing lifted booking revenue 55% for clients with Campaign Monitor automations.

Switchback Email Marketing is a specialized agency for the vacation-rental industry. They craft branded campaigns, automate guest/owner comms, and boost direct bookings.

55%
booking revenue increase (via automations)

0.82
open-rate increase from inactive audience in the first month

“

With Campaign Monitor, the team is an extension of our team… The software has allowed us to craft specific solutions and services for the vacation rental industry that are unique not only to Switchback but also to our clients’ email marketing strategies

Ryan Austin

Founder, Switchback Email Marketing

1
Create a flow

2
Add your email list

3
Start sending

GET YOUR FIRST MONTH 90% OFF.

Key Features:

• Agency Dashboard: Manage all client accounts from one centralized interface without switching logins
• White-Label Reporting: Generate fully branded reports and dashboards that reinforce your agency’s expertise
• Advanced Automation: Create sophisticated customer journeys with behavioral triggers and conditional logic
• Template Governance: Lock brand elements to prevent unauthorized changes while allowing content flexibility
• Dedicated Support: Access to agency specialists with guaranteed response times and migration assistance

Pricing starts at $12/mo

(Price may change, depending on number of contacts, with 10% annual discount)

What else can you do with Campaign Monitor?

Beyond email marketing, Campaign Monitor offers SMS marketing for integrated campaigns, transactional email capabilities for automated notifications, and a comprehensive API for custom integrations.

The platform also provides professional services including campaign strategy, design reviews, and team training to help agencies maximize their client results.

Want to deliver fully branded client experiences? Explore our top white-label email marketing platforms.

2) Emma – Enterprise-Grade Multi-Account Management

Rating: 4/5 (540+ reviews)

Emma excels in providing enterprise-level account structure and brand governance tools, making it ideal for larger agencies managing complex client hierarchies.

The platform’s tiered account system allows unlimited subaccounts with granular user permissions and approval workflows.

Key Features:

• Tiered account structure: Emma HQ provides a top-level account with subaccounts for distributed teams.
• Brand governance controls: Lock template styles and share brand assets to keep campaigns on-brand.
• Approval workflows: Review sends from an approvals dashboard, with options to reschedule or cancel.
• Advanced analytics: Compare results across mailings and view Emma’s Mailing Score benchmark.
• Multi-channel orchestration: Integrated SMS available alongside email within Emma.

Considerations before going with Emma:

• Emma’s base plan excludes automation and landing pages, requiring the Essentials tier for full functionality.
• SMS costs extra and requires manual bundle management, which can complicate billing for agencies with varying client needs.

Emma’s pricing starts at $99/month

Emma’s tiered account structure allows corporate teams to maintain brand consistency while empowering local teams.

If you want to benchmark client performance more effectively, review the core email marketing KPIs every agency should monitor

3) ActiveCampaign – Advanced Automation for Data-Driven Agencies

Rating: 4.5/5 (14.4K+ reviews)

ActiveCampaign combines powerful marketing automation with CRM functionality, making it ideal for agencies focused on complex customer journeys and lead nurturing.

The platform’s AI-powered automation builder and 900+ pre-built recipes help agencies quickly deploy sophisticated campaigns.

Key Features:

• AI-powered automation builder: Uses AI to help create and optimize automation workflows (not guaranteed to generate full flows instantly).
• Integrated sales CRM: Track deals, stages, and contact activity within the same platform.
• Multi-channel orchestration: Run email, SMS, and WhatsApp campaigns with unified reporting.
• Advanced segmentation: Premium tiers offer granular targeting plus predictive features (e.g., predictive send/content).
• Automation recipe library: 900+ prebuilt automation “recipes” for common agency use cases.

Considerations before going with ActiveCampaign:

• Full feature access requires Pro or Enterprise tiers, making it expensive for smaller agencies.
• The interface can be overwhelming for basic users, and enhanced CRM features require separate add-ons.

ActiveCampaign pricing starts at $15/month, requires signup for agency features

To keep complex workflows organized across clients, read our email marketing checklist to ensure every campaign meets best-practice standards.

4) SendGrid – Developer-First Platform for Technical Agencies

Rating: 4/5 (300+ reviews)

SendGrid excels as a developer-focused email platform with industry-leading deliverability and robust API capabilities.

Technical agencies appreciate its programmatic sending capabilities and comprehensive testing tools.

Key Features:

• Developer-first architecture: RESTful API for email sending, with SDKs/library support for major languages like Python and Node.js.
• Reliability & SLA: Infrastructure offering an advertised 99.99% uptime SLA.
• Testing features: Email rendering previews, spam-testing and link-validation capabilities (dependent on plan).
• Template system: Dynamic templates with API integration and “drag-and-drop” editors; versioning/real-time editing may depend on plan.
• Enterprise controls: Options for dedicated IPs, subuser management for multi-tenant or agency workflows.

Considerations before going with SendGrid:

• The platform isn’t beginner-friendly for non-technical marketers.
• Key features like automation and dedicated IPs require higher-tier plans, and the interface prioritizes functionality over visual campaign building.

SendGrid pricing starts at $19.95/mo; requires sign up for agency features

Read next: We Compared 15+ SendGrid Alternatives – Here’s #1

5) GetResponse – All-in-One Platform for Course Creator Agencies

Rating: 4.3/5 (800+ reviews)

GetResponse combines email marketing with webinar hosting and online course creation, making it ideal for agencies serving coaches, educators, and content creators.

The platform’s AI-powered tools streamline content creation across multiple channels.

Key Features:

• Integrated webinar platform: Host live and on-demand webinars with landing pages and automated follow-ups.
• AI course creator: Generate course outlines/modules and quizzes from prompts, then build lessons in the course tool.
• Conversion funnel builder: Use preconfigured funnels for opt-ins, webinars, sales, and lead magnets.
• Advanced automation: Visual workflows with conditions, actions, and filters for behavioral logic.
• E-commerce integration: Product recommendations, abandoned-cart recovery, and revenue attribution.

Considerations before going with GetResponse:

• SMS marketing costs extra and advanced features like AI recommendations require the MAX tier.
• The learning curve can be steep for complex funnel setups.

GetResponse offers partner options for agencies

Read more: GetResponse Alternatives That Focus on Email Marketing

6) AWeber – AI-Powered Platform for Small Business Agencies

Rating: 4.2/5 (630+ reviews)

AWeber leverages AI throughout its platform to help agencies create content, optimize campaigns, and automate customer journeys.

The platform’s fixed-price unlimited plan removes growth penalties for high-volume senders.

Key Features:

• AI writing assistant: Generates email copy and subject line suggestions.
• Team hub management: A feature that allows agencies to manage multiple client accounts with customizable roles and permissions from a single login.
• Integrated e-commerce tools: Sell digital products and paid newsletters with automated delivery (via Stripe).
• Automation recipes: Prebuilt workflows (e.g., welcome series); abandoned cart via supported e-commerce integrations.
• Analytics & testing: Engagement and sales reports with A/B testing.
• Pricing model: Subscriber-based tiers (not a fixed-price unlimited plan).

Considerations before going with AWeber:

• Send limits are based on subscriber multipliers which can confuse high-volume senders.
• The platform lacks SMS beyond web notifications and has no free forever tier.

AWeber pricing starts at $15/month; requires booking a demo for agency features

Read next: AWeber Alternatives That Offer Better Value

7) Moosend – Cost-Effective Full-Feature Platform

Rating: 4.7/5 (700+ reviews)

Moosend delivers enterprise-grade features at competitive prices with AI-powered content tools and comprehensive automation.

The platform offers significant discounts for annual billing, making it attractive for cost-conscious agencies.

Key Features:

• AI-enhanced content creation: Generate email copy and subject lines (also usable in landing pages/forms).
• Visual workflow builder: Drag-and-drop automations with triggers, conditions, and actions.
• Comprehensive feature set: Email marketing, landing pages, forms, SMTP and transactional email.
• Enterprise security/options: SSO and SAML available on certain plans; dedicated IPs offered as an add-on.
• Flexible pricing structure: Annual-billing discounts and custom enterprise plans available.

Considerations before going with Moosend:

• Contact-based pricing increases costs with large lists unless customized.
• Advanced features like transactional email and SSO require higher plans or add-ons.

Moosend offers a partner program for agencies with exclusive benefits

Read next: Moosend Alternatives (Ranked)

On drives 20% of sales with Campaign Monitor email.

On is a Swiss performance running shoes & apparel brand using automation + personalization to engage runners worldwide.

20%
of e-commerce sales attributed to email

10%
more engagement on personalized campaigns

“

Targeted emails allow us to be with our customers when and where they need us. And they’re resulting in more opens, clicks, and purchases.

Anja Peiffer

E-Commerce Team

1
Create a flow

2
Add your email list

3
Start sending

GET YOUR FIRST MONTH 90% OFF.

8) Drip – Behavioral Marketing for Data-Driven Agencies

Rating: 4.4/5 (450+ reviews)

Drip specializes in behavioral email marketing with real-time segmentation and onsite messaging integration.

Agencies focused on ecommerce and subscription businesses appreciate its sophisticated automation capabilities.

Key Features:

• Real-time behavioral segmentation: Dynamic segments based on purchase history, site behavior, and engagement.
• Integrated onsite messaging: Popups, slide-ins, and sticky bars that can trigger email journeys.
• Visual workflow builder: Drag-and-drop automations with split paths and goals.
• E-commerce data sync: Native integrations with major carts (e.g., Shopify, WooCommerce, BigCommerce) to pull order, product, and customer data.

Considerations before going with Drip

• Single pricing tier offers no lower-cost options for small lists.
• Onsite features may overlap with existing popup tools, and there’s no built-in SMS channel.

Drip offers a partner program with tiered commissions for agencies

Read next: We Compared 19 Drip Alternatives – Here’s #1

9) MailerLite – User-Friendly Platform with Fair Pricing

Rating: 4.6/5 (1.08K+ reviews)

MailerLite combines simplicity with powerful features, offering generous free tiers and transparent pricing.

Agencies appreciate its intuitive interface and comprehensive website building capabilities.

Key Features:

• Unified digital platform: Email marketing, automation, landing pages, and websites in one interface.
• AI writing assistant: Generate email copy/subject lines (available on Advanced plan).
• Pricing structure: Free plan available; paid plans are subscriber-based and include monthly send limits (not unlimited).
• Customer support: 24/7 support on paid plans; live chat available on higher tiers (no guaranteed 5-minute SLA).
• Website builder: Responsive sites with blogs, SEO controls, and password protection.

Considerations before going with MailerLite:

• Both paid plans limit to 500 subscribers before pricing increases.
• Advanced features like AI assistant and smart sending require the Advanced plan, and there’s no native SMS channel.

MailerLite starts offers a free plan with 12,000 monthly emails, then pricing starts at $10/mo

Read next: MailerLite Alternatives That Scale Better

10) HubSpot – Complete Marketing Automation Suite

Rating: 4.5/5 (14K+ reviews)

HubSpot offers a comprehensive marketing automation platform that extends far beyond email to include CRM, sales tools, and content management. Its agency partner program and multi-account management make it suitable for full-service marketing agencies.

Key Features:

• Agency partner program: Dedicated enablement for agencies, including training, credentials, and partner support.
• Marketing Hub features: Email marketing, social media tools, SEO/lead capture, landing pages, and analytics in one platform.
• CRM connection: Natively ties marketing activities to HubSpot’s Smart CRM and sales pipelines.
• Smart content personalization: Dynamic content based on list membership, lifecycle stage, device, location, and more.
• User permissions & teams: Granular, role-based access controls within each account.

Considerations before going with HubSpot:

• Professional features start at $800/month, making it expensive for smaller agencies.
• The platform’s complexity requires significant training, and advanced features can be overwhelming for simple email campaigns.

HubSpot pricing starts at $15/mo

• Billed monthly; requires Starter level of HubSpot software.
• Billed monthly; requires Professional or Enterprise level; onboarding fee required; if using Sales or Service Hub to qualify, minimum 4 seats for one of those subscriptions.

11) Mailjet – Developer-Friendly Transactional Platform

Rating: 4/5 (150+ reviews)

Mailjet specializes in both marketing and transactional email with strong API capabilities and collaborative features.

Technical agencies appreciate its developer tools and reliable infrastructure.

Key Features:

• Dual email platform: Create and send marketing and transactional emails in the same platform.
• Collaborative design tools: Real-time, Google-Docs-style editing and comments in the Email Editor.
• Advanced segmentation: Target by attributes and behaviors with built-in segmentation.
  
• Robust API & webhooks: RESTful Email API/SMTP with comprehensive docs and real-time event webhooks.
• Deliverability & IP options: Dedicated IPs and reputation tools; EU data residency across multiple EU data centers.

Considerations before going with Mailjet:

• The platform requires technical knowledge for advanced features.
• Marketing automation capabilities are limited compared to specialized platforms, and the interface prioritizes functionality over visual design.

Mailjet offers a free plan with 6000/mo, pricing starts at $17/mo

Improving your agency workflow? Our updated email marketing guide shows how to structure services, pricing, and processes for scalable growth.

The Verdict: Which Email Marketing Platform Should Agencies Choose? (Our Top 3 Picks)

• Campaign Monitor — Best overall for agencies: agency dashboard, white-label reporting, granular permissions, and template locking make multi-client work seamless.
• Emma by Marigold — Best for enterprise control: tiered accounts, brand governance, and approvals suit complex orgs.
• ActiveCampaign — Best for advanced automation: powerful workflows plus CRM for data-driven teams.

The choice ultimately depends on your team’s size, client mix, and budget. For most agencies that want scalable multi-client management without extra logins, Campaign Monitor delivers the strongest balance of control, branding, and ease of use.

Ready to streamline your agency’s email ops? Don’t juggle patchwork tools.

Request a Campaign Monitor demo or try it for free today to see why it’s our #1 pick for professional marketing agencies.