10 Best Email Marketing Tools for Agencies in 2026
November 20, 2025
Agencies need email marketing tools that support multiple clients, flexible workflows, and quick campaign creation. The right platform should help you create better content, manage client accounts smoothly, and automate repeated work without slowing your team. Strong analytics, reliable sending, and easy collaboration matter even more as your agency grows.
This blog highlights the best tools for agencies along with their key features and current pricing. Each platform brings its own strengths, from advanced automation to smart content creation, helping you choose the option that fits your client needs and long term goals.
Mailmodo is an AI email marketing platform designed for agencies that manage multiple clients. Its AI tools help generate email copy, remix templates, and can build automated journeys quickly, which ends up in reducing the repetitive work across accounts. Agencies can manage multiple brands, domains, and permissions from one workspace, making coordination easier.
What makes Mailmodo different is its combination of AI with interactive AMP emails. Agencies can place forms, surveys, and actions inside the inbox to boost engagement without extra effort, helping them deliver stronger results for every client.
Key features
Pricing (billed annually):
HubSpot is a powerful option for agencies that need an all-in-one system combining email marketing, CRM, automation, and reporting. Agencies can manage multiple clients using separate pipelines, lists, and custom properties, making it easier to organize campaigns and track engagement. Its drag-and-drop builder and smart content tools help create personalized emails quickly.
HubSpot stands out for its deep CRM + email connection. Every email open, click, and form submission syncs instantly, giving agencies a full view of each contact’s journey. This makes it especially strong for agencies handling lead-based or B2B clients.
Key features
Pricing (billed annually):
Mailchimp is often the go-to solution for agencies that handle a portfolio of several small or medium-sized clients. The drag-and-drop editor, ready-to-use templates, and automated journeys are designed in such a way that anyone can build campaigns in no time. Agencies can organize client accounts through audience segmentation and use tags to keep workflows clean and manageable.
Mailchimp’s standout feature is its extensive integrations, allowing agencies to connect ecommerce stores, CRMs, and ads easily. Its reporting dashboard gives a clear view of performance across clients, which helps agencies handle frequent reporting cycles.
Key features
Pricing (billed annually):
ActiveCampaign is an AI-powered marketing automation platform designed for agencies that have a multi-client and multi-channel setup. With this tool, you can effectively run campaigns via email, SMS, WhatsApp, and landing pages, as well as consolidate client contacts, workspaces, and reporting in one place. The platform’s automation tools reduce repetitive tasks, letting agencies scale systems rather than individual campaigns.
Its agency-friendly architecture supports white-label options, account controls and partner-style discounts, making it ideal for agencies delivering multi-client email programmes.
Key features
Pricing (billed annually):
Brevo is an email marketing and automation platform that is designed for agencies and multi-client operations. Some of the features include AI-powered content tools, multi-channel campaigns (email, SMS, WhatsApp), and client-centric workspaces that help agencies manage multiple brands from a single account.
The thing that separates Brevo from the competition is its price plan which is determined by the number of emails sent (not contacts), thus giving a clear way for agencies with different client lists to grow their business.
Key features
Pricing (billed annually):
Salesforce Marketing Cloud (SMC) is a marketing platform specifically designed for agencies and big enterprises that carry out complicated, multi-brand, multi-channel campaigns. It is all about scaling and leveraging the whole Salesforce ecosystem with features like automation journeys, AI-driven insights, and cross-channel orchestration (email, SMS, WhatsApp, web, mobile).
What makes SMC stand out for agencies is its ability to manage multiple business units, brand-specific audiences, and global data under one platform — ideal for high-volume campaigns and multi-client structures.
Key features
Pricing ( billed annually):
Constant Contact is a perfect fit for small to medium-sized agencies that require a user-friendly, efficient platform to manage their email, social posting, and event marketing activities in one place. Agencies that do not heavily customize their campaigns but run standard ones will find its drag-and-drop editor, pre-built automation templates, and easy workflows just right for them.
One of its unique strengths is the built-in event-marketing and social-ad tools, allowing agencies to manage campaigns that extend beyond email and demonstrate value across multiple touch-points.
Key features
Pricing (billed annually):
SendGrid Marketing Campaigns is an email marketing platform that is ideal for agencies that require excellent deliverability and have varying volume needs. It provides user-friendly email builders, automation, and analytics, at the same time, giving agencies the technical power to manage large or segmented client lists.
Essentially, the major differentiator is the pairing of a reliable email delivery system with marketing campaign tools, thus, it is perfect for agencies dealing with complex client requirements across different brands and regions.
Key features
Pricing (when billed annually):
Campaign Monitor is an email marketing platform suited for agencies sending frequent campaigns across multiple client lists. Its drag-and-drop builder, journey automation, and team workflows help agencies deliver consistent campaigns with ease.
What makes it stand out is the support for unlimited emails at higher tiers and features like branded templates, segmenting, and engagement tracking—useful when you serve multiple clients under one platform.
Key features
Pricing (billed annually):
Keap is a customer relationship management (CRM) and automation tool created for agencies that want to manage sales and email marketing for several clients at the same time. This means you can keep contacts, track pipelines, send out email campaigns and automate workflows.
What makes Keap stand out is that all features (CRM, email, automation) are included in every plan, pricing scales based on contacts and users rather than feature-locks, which works well for multi-client agency setups.
Key features
Pricing (billed annually):
Choosing the right email marketing tool is essential for agencies that manage multiple clients and diverse workflows. Each platform offers its own strengths, from AI driven creation to advanced CRM integrations and large scale automation, so the ideal choice depends on your client needs and campaign goals. A dependable platform should help your agency work faster, collaborate smoothly, and deliver clear results. Reviewing features, pricing, and long term scalability ensures you select a tool that supports both client success and agency growth.
Q1: How do I choose the best email marketing tool for my agency?
Choose a platform that supports multiple clients, offers reliable automation, and provides clear pricing in USD. Review its templates, analytics, and integrations. A short trial with one client helps confirm whether it fits your workflow and reporting needs.
Q2: Can these platforms manage multiple clients in one account?
Most agency friendly tools offer client workspaces, separate domains, and clear access controls. This keeps client data organised while allowing one central dashboard. The depth of multi-client support differs, so always confirm the exact structure on the official product page.
Q3: Are the prices accurate for all countries?
Prices are checked on official sites and listed in USD, but final amounts can vary due to taxes and regional billing rules. Use the USD price as a baseline and confirm the exact amount during checkout for your country.
Q4: Do these tools connect with CRMs like HubSpot or Salesforce?
Many platforms offer native CRM connections or use automation tools to sync contacts and engagement data. The level of syncing depends on the platform and the CRM edition, so reviewing the official integration guide is always recommended.
Q5: How can an agency maintain strong deliverability for clients?
Use proper authentication, warm new domains slowly, and keep lists clean by removing inactive contacts. Encourage consistent engagement and monitor performance often. Good sending habits across all clients help maintain a strong sender reputation.
Q6: Should agencies focus more on AI features or interactive email features?
Choose based on client goals. AI helps you create content faster and scale production across clients. Interactive email features can improve engagement for supported inboxes. Agencies often use a mix of both to balance speed and performance.
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Mailmodo is an email marketing tool, powered by AMP Emails, enabling users to create & send app-like interactive emails to improve conversions.
This allows your users to
- Book meetings
- Submit quizzes
- Take polls
- Share reviews
- Take NPS & CAST surveys
and much more all inside the email itself
