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How we evaluate tools →
Quick answer:Brevo is the top pick for agencies, offering unlimited contacts across all plans, native multi-channel support (SMS, WhatsApp, push), and a 99% delivery rateΓÇöall starting at $9/month. Its automation scales from simple drips to complex workflows without per-contact pricing penalties that would crush agency margins.
Why Agencies Matters
Agencies juggle multiple client campaigns, budgets, and reporting requirements simultaneously. The right email platform must scale across accounts, automate complex workflows, and deliver transparent ROIΓÇöwithout requiring a developer or draining resources on setup. Choosing the wrong tool means wasted time on manual work, poor deliverability, or overpaying for unused features.
Verified May 2026. Annual billing typically 15–20% cheaper.
Our #1 Pick
⭐ #1 Best for AgenciesScore: 98/100
Brevo
Launch high-converting email, SMS, push, and WhatsApp campaigns in minutes. Unify your store, website, and campaign data into a single customer view to precisely target VIPs, cart abandoners, and lapsed buyers. Activate proven automations including abandoned cart recovery, browse abandonment, price-drop alerts, back-in-stock notifications, and VIP early access. A/B test subject lines, offers, and CTAs to optimize performance. Scale your delivery with intelligent warm-up, throttling, frequency caps, and send-time optimization. Monitor revenue, average order value, and conversions in real time with comprehensive analytics. Transform one-time buyers into loyal customers with automated post-purchase flows, replenishment reminders, review requests, and win-back campaignsΓÇöall managed from a single, powerful platform.
From$9/mo
Editorial score98/100
Brevo's visual workflow builder and unlimited contacts on Standard ($18/mo) let agencies manage dozens of client campaigns without contact-count escalation. The platform includes abandoned cart automations, AI segmentation, and revenue attributionΓÇöcritical for proving client ROI. Drip would be better only if your agency specializes exclusively in ecommerce and can absorb $39/month minimums per client account.
Brevo is ideal for agencies managing multiple client campaigns because unlimited contacts …
Launch high-converting email, SMS, push, and WhatsApp campaigns in minutes. Unify your store, website, and campaign data into a single customer view to precisely target VIPs, cart abandoners, and lapsed buyers. Activate proven automations including abandoned cart recovery, browse abandonment, price-drop alerts, back-in-stock notifications, and VIP early access. A/B test subject lines, offers, and CTAs to optimize performance. Scale your delivery with intelligent warm-up, throttling, frequency caps, and send-time optimization. Monitor revenue, average order value, and conversions in real time with comprehensive analytics. Transform one-time buyers into loyal customers with automated post-purchase flows, replenishment reminders, review requests, and win-back campaignsΓÇöall managed from a single, powerful platform.
$9/mo
Editorial score98/100
Users consistently praise the platform for its ease of use and intuitive interface, making it accessible even for those without technical backgrounds. The all-in-one capabilities for email, SMS, and automation streamline marketing efforts, allowing for effective campaign management. However, some users note that advanced customization options can be limited, which may restrict more complex workflows.
Why teams choose Brevo
User-friendly interface with a clean design, making it accessible for beginners
Ease of integration and a user-friendly interface for marketing needs
Convenient and efficient email marketing capabilities, including automation and customizable templates
Worth knowing: Limited features, especially in template flexibility and automation capabilities, which hinder effective marketing
ConvertKit is not ideal for most agencies due to its per-subscriber pricing …
Kit is a practical choice for small teams managing email campaigns and subscriber lists with limited resources. Its tagging, automation, and segmentation tools are easy to adopt, though users may need extra time to configure advanced workflows or customize visual elements. While design flexibility is limited, the platformΓÇÖs structure supports consistent execution and reliable delivery.
$25/mo
Editorial score97/100
Users consistently praise the user-friendly interface and effective automation features of ConvertKit, which simplify email marketing for both beginners and experienced marketers. The platform's ability to manage subscribers and create targeted campaigns is highly valued, making it a preferred choice for creators. However, some users note that the pricing can be steep as their subscriber lists grow.
Why teams choose ConvertKit
Users value the ease of use in ConvertKit, praising its simple setup and intuitive interface for seamless integration.
Users love the user-friendly automation tools of ConvertKit, enhancing their email marketing efficiency and workflow significantly.
Users appreciate the excellent customer support from ConvertKit, ensuring help is readily available when needed.
Worth knowing: Users find the pricing for smaller creators to be quite high, limiting access to essential features at affordable rates.
Constant Contact starts at $20/month and suits agencies managing small client bases …
Constant Contact helps small businesses manage outreach and engagement. ItΓÇÖs popular with marketing and admin teams in nonprofits and service-based firms. Reviewers highlight its drag-and-drop editor and campaign scheduling. Some cite limited automation and integrations. Recent updates include AI content generation.
$20/mo
Editorial score86/100
Users consistently praise the ease of use and intuitive design of Constant Contact, which simplifies email marketing and campaign management. Many appreciate its ability to create professional-looking emails quickly, along with effective list segmentation and analytics that enhance communication strategies. However, some users note that the platform can feel slow at times, particularly when handling larger campaigns.
Why teams choose Constant Contact
Users find Constant Contact's ease of use invaluable for creating and managing engaging email campaigns effortlessly.
Users enjoy easy creation of email marketing campaigns with Constant Contact, facilitating engagement and customization for small businesses.
Users appreciate the user-friendly email builder of Constant Contact, making campaign creation quick and efficient.
Worth knowing: Users find the missing features in Constant Contact frustrating, especially regarding search, editing, and relevance to their needs.
Drip is ideal for agencies managing ecommerce-focused clients. Its automation engine supports …
Drip is the marketing automation platform built for B2C businesses that sell digital or physical goods online. From creators and ecommerce shops to travel and education companies, Drip helps brands convert prospects into lifelong customers. By turning customer and visitor data into dynamic segments, Drip enables you to deliver the right message at the right time through powerful automations, beautifully designed email templates, and ready-to-use campaigns that drive results from day one. Built to grow with you and simple to master, Drip transforms your marketing into a strategy you can trust to drive revenue.
$39/mo
Editorial score87/100
Users consistently praise the product for its intuitive interface and powerful automation features, which simplify the process of creating targeted email campaigns. Many appreciate the responsive customer support that assists with setup and troubleshooting, making it easier to navigate the platform. However, some users note a common limitation with the steep learning curve for beginners, which can hinder initial use.
Why teams choose Drip
Time-saving automation enables effective email marketing with rich analytics and easy setup
Automation allows seamless operation once configured
Ease of use with simple setup and intuitive automation workflows
Worth knowing: Pricing is expensive, especially for small businesses and startups
GetResponse's drag-and-drop email builder and user-friendly interface make campaign creation fast for …
GetResponse is the email, automation, and AI platform that helps you grow your business across the channels you own - like email, SMS, landing pages, and popups.
$19/mo
Editorial score97/100
Users consistently praise the ease of use and automation features of GetResponse, highlighting its intuitive interface that simplifies email marketing tasks. Many appreciate the platform's ability to create landing pages and manage campaigns efficiently, making it suitable for both beginners and experienced marketers. However, some users note that the reporting capabilities could be improved, as they find it lacking in depth and detail.
Why teams choose GetResponse
Extremely user-friendly interface, making complex tasks simple and intuitive
Responsive customer support with fast help through live chat and effective assistance
Exceptional user-friendliness with excellent support and training
Worth knowing: Steep learning curve, making it challenging to fully utilize features
Klaviyo's 4.6 G2 rating and Shopify integration make it strong for agencies …
Klaviyo empowers small businesses to automate email and SMS campaigns using behavior-based targeting and real-time analytics. Marketing and retail teams favor its segmentation tools and Shopify integration.
$30/mo
Editorial score98/100
Users consistently praise Klaviyo for its ease of use and powerful segmentation capabilities, which allow for highly targeted email marketing. The platform's seamless integration with Shopify enhances its functionality, making it a preferred choice for eCommerce businesses. However, many users note that the pricing can become expensive as contact lists grow, which may be a concern for smaller businesses.
Why teams choose Klaviyo
Extremely user-friendly, making it easy to organize campaigns and use features
Powerful automation that makes email marketing efficient and engaging
Easy integration with other platforms enhances marketing campaigns
Worth knowing: Expensive, which can be a barrier for beginners
Mailchimp's $20/month Growth plan offers agencies a solid entry point with A/B …
Data-driven marketing without the complexity
$20/mo
Editorial score97/100
Users consistently praise the user-friendly interface and powerful automation features of Intuit Mailchimp Email Marketing, which simplify the process of creating and managing email campaigns. Many appreciate the ease of use, allowing even beginners to design professional emails quickly. However, a common concern is that pricing can become expensive as contact lists grow, which may limit accessibility for smaller businesses.
Why teams choose Mailchimp
Very easy and intuitive for creating effective email campaigns
User-friendly interface and editing tools enhance email marketing effectiveness
User-friendly interface with robust features
Worth knowing: Pricing quickly escalates with growing contact lists, challenging for small businesses
Based on G2 user reviews. Paraphrased and aggregated.
Pros
Pros
User-friendly interface with a clean design, making it accessible for beginners
Ease of integration and a user-friendly interface for marketing needs
Convenient and efficient email marketing capabilities, including automation and customizable templates
Easy setup that makes email marketing efficient and hassle-free
Cons
Cons
Limited features, especially in template flexibility and automation capabilities, which hinder effective marketing
Limited features in design and automation capabilities, considered a notable drawback
Limited customization, making creative marketing and complex workflow management difficult
Steep learning curve for beginners, making initial setup and navigation challenging
Brevo Pricing
Plan
Monthly
Annual
Users
Features
Free Free
Free
Free
1 users
300 emails/day (9,000/month), unlimited contacts, basic email builder and forms, automation up to 2,000 contacts, Brevo branding on emails.
Starter
$9/mo
$8/mo
1 users
From 5,000 emails/month, unlimited contacts, drag-and-drop editor, AI content generator, advanced segmentation, basic reporting; no automation or A/B testing.
Growth
$18/mo
$16/mo
1 users
From 20,000 emails/month, unlimited contacts, full automation, A/B testing, heatmaps, AI send-time optimization, web/event tracking, 1 landing page included.
Pro
$499/mo
$449/mo
10 users
From 150,000 emails/month, 10 seats, WhatsApp/push channels, AI segmentation, contact scoring, ecommerce AI features, phone support, deliverability specialist.
Enterprise
Custom
—
Unlimited
Custom pricing for 1M+ contacts; dedicated IP, SSO/SAML, multi-account management, custom objects, loyalty engine, custom data integrations, tailored onboarding.
Pricing verified April 2026.
Brevo: Key Features
A/B & Multivariate Testing
A/B testing for subject lines and content available on Standard plan and above; not included on Free or Starter.
AI-Powered Features
AI content generator (subject lines and body copy) on all paid plans; AI send-time optimization on Standard+; AI segmentation on Professional+.
Audience Segmentation & Personalization
Advanced segmentation using demographics, website activity, campaign engagement, and custom events; dynamic lists that auto-update on all paid plans.
Contact & List Management
Unlimited contacts on all plans; list-based architecture with import via CSV or API; duplicate management and suppression lists supported.
Deliverability & Spam Tools
99% delivery rate claimed; DKIM/SPF/DMARC authentication; Deliverability Specialist support on Professional (3 hrs/year); dedicated IP on Enterprise only.
E-Commerce & CRM Integrations
Native Shopify and WooCommerce integrations; abandoned cart automations; 150+ integrations; AI product recommendations on Professional+; built-in CRM.
Email Builder & Templates
Drag-and-drop builder plus HTML editor; responsive industry-specific templates included on all plans including Free.
Landing Pages & Signup Forms
1 landing page included on Standard; more on Professional+; signup forms (embedded, popup) available on all plans including Free.
How We Chose These Tools
📊 Our methodology
We evaluated each tool across six criteria: G2 user rating, number of verified reviews, pricing transparency, free tier availability, feature depth for agencies, and data freshness. Tools scoring below 65/100 on our editorial rubric are excluded from rankings. Affiliate relationships have no influence on rankings — see our editorial policy.
Which email marketing tool is best for agencies managing multiple client accounts?
Brevo is built for agencies because it charges per account, not per contact. You can manage unlimited contacts across all paid plans starting at $18/month per client, making it cost-effective when scaling to dozens of campaigns. Klaviyo charges by active profile count, which escalates quickly across multiple client accounts. ConvertKit caps subscriber counts per plan, forcing expensive upgrades for growing client bases. Drip's $39/month minimum per account adds up fast across a client roster. Brevo's multi-channel support (SMS, WhatsApp, push) in one platform eliminates the need to stack separate tools for each client channel.
How do agency pricing models differ across these email marketing platforms?
Brevo charges per email volume, not per contact, making it ideal for agencies managing multiple client accounts without escalating costs. Klaviyo and Drip use active profile/contact tiers ($30ΓÇô$154/mo), which multiply when managing separate client accounts. Mailchimp and GetResponse cap contacts per plan (500ΓÇô1,000), forcing plan upgrades as client lists grow. Constant Contact uses a send-limit model (10xΓÇô24x contact count), which can surprise agencies with high-volume clients. For agencies, Brevo's $18/month Growth plan with unlimited contacts and full automation beats per-contact pricing that compounds across multiple client accounts.
How quickly can an agency set up Brevo for a new client campaign?
Brevo's drag-and-drop email builder and pre-built automation templates enable agencies to launch a client campaign within 30ΓÇô60 minutes. The platform includes industry-specific templates on all plans, and the visual workflow builder requires no coding. Integration with Shopify, WooCommerce, or your CRM via API takes an additional 15ΓÇô30 minutes. Most agencies report that onboarding a new client contact list and configuring a basic abandoned cart or welcome series automation happens in a single session, making it faster than competitors like Drip (which has a steeper learning curve) or Klaviyo (which requires more segmentation setup upfront).
How well do these platforms integrate with the tools my agency clients already use?
Brevo leads with 150+ integrations including native Shopify, WooCommerce, and a built-in CRM, making it adaptable to most client tech stacks without custom development. Klaviyo offers 350+ integrations and deeper ecommerce data sync, but its per-profile pricing model makes managing multiple client accounts expensive. Mailchimp provides 300+ integrations and native landing pages, though its audience-based architecture limits flexibility when handling diverse client needs. For agencies managing varied client types, Brevo's combination of breadth (150+ integrations), native multi-channel support, and flat contact pricing makes it the most cost-effective choice.
Which email marketing tool should agencies avoid, and why?
ConvertKit should be avoided for most agency use cases. Its subscriber cap on the Starter plan ($25/mo) limits you to 1,000 subscribers per account, forcing agencies to purchase separate subscriptions for each clientΓÇömultiplying costs rapidly. Additionally, ConvertKit lacks transactional email and SMS capabilities, restricts automation to paid plans only, and offers no native multi-channel support. For agencies managing multiple clients with varying list sizes, these constraints make ConvertKit economically unviable compared to Brevo's unlimited contacts and multi-channel features at lower price points.
Our Verdict on Agencies Tools
Brevo's visual workflow builder and unlimited contacts on Standard ($18/mo) let agencies manage dozens of client campaigns without contact-count escalation. The platform includes abandoned cart automations, AI segmentation, and revenue …
$9/mo