Picking the right email marketing platform for your agency isn’t just about open rates and drag-and-drop editors. It’s about managing multiple client accounts without losing your mind, generating reports that actually impress clients, and automating workflows so your team isn’t rebuilding the same sequences from scratch every month.
This list was built around four criteria: multi-client account management, automation depth, pricing transparency at scale, and how well each platform handles reporting. Every tool here has been selected because it solves a real agency problem — not just because it ranks well in generic reviews.
1. ActiveCampaign — Best for Automation-Heavy Agencies
If your agency sells sophisticated email marketing as a service — segmentation, behavioral triggers, lead nurturing funnels — ActiveCampaign is the platform most likely to impress your clients and keep your team efficient.
The automation builder lets you layer conditions across email engagement, site visits, CRM fields, and purchase history within a single visual canvas — complex enough to handle real enterprise workflows, clear enough to walk clients through on a screen share. Few platforms in this price range match that combination without pushing you into enterprise contracts.
Multi-Client Management
ActiveCampaign’s agency model supports separate accounts per client, each with its own billing and settings. You get a centralized login to switch between accounts quickly. The downside: pricing is per-account, not a flat agency rate, so costs scale up as your client roster grows. Agencies managing 10+ clients should negotiate directly with their sales team — volume discounts exist but aren’t advertised on the pricing page.
Standout features for agencies:
- 900+ pre-built automation templates
- CRM included on Plus plans and above
- Predictive sending and win probability scoring
- Deep integrations with Shopify, WooCommerce, Salesforce, and 900+ apps
Pricing: Starts at $15/month for 1,000 contacts. Agency pricing available on request.
2. Klaviyo — Best for Agencies with E-Commerce Clients
Foto: Walls.io
If a significant portion of your client base runs Shopify, WooCommerce, or BigCommerce stores, Klaviyo is the email platform built specifically for that world. Its data model is structured around products, orders, and customer lifetime value — which means the reports you pull actually speak the language your e-commerce clients care about.
Klaviyo’s segmentation is based on real purchase behavior, not just email clicks. You can build audiences like “bought twice in the last 90 days but hasn’t opened an email in 60” without any workarounds. That kind of precision is what separates good email revenue from great email revenue.
Revenue Attribution
The built-in revenue attribution dashboard changes the client reporting conversation entirely. Instead of showing open rates, you’re showing “this campaign drove $14,200 in attributed revenue last month.” That number keeps clients renewing — and makes price objections much easier to handle.
Klaviyo’s Partner Program also offers revenue sharing for certified agencies, alongside co-marketing support and priority access to new features. If you’re building a practice around e-commerce clients, the partner benefits compound quickly as your certified tier increases.
Standout features for agencies:
- Native Shopify integration with real-time sync
- Flows (automation sequences) built around purchase events
- Predictive analytics: CLV, churn risk, next order date
- SMS and email in one platform
- Partner program with revenue sharing for agencies
Pricing: Free up to 250 contacts. Scales based on contacts — 1,000 contacts costs $30/month. Gets expensive fast, but the ROI conversation is easier to make.
3. Brevo (formerly Sendinblue) — Best for Agencies Watching the Budget
Brevo has quietly become one of the most capable platforms in this price range. It switched to a sending-volume model instead of a contact-based model — meaning you can store unlimited contacts and pay based on how many emails you send per month. For agencies managing large lists with irregular sending schedules, that’s a structural cost advantage that compounds as your client base scales.
The platform covers email, SMS, WhatsApp, live chat, and basic CRM in a single dashboard. It’s not the deepest in any one channel, but the breadth is useful when you’re managing smaller clients who want a unified solution without paying for five different tools.
White-Label and Reseller Options
Brevo’s white-label reseller program lets agencies sell the platform under their own brand. You set the pricing, handle the client relationship, and Brevo handles the infrastructure. Margins are entirely yours to define — some agencies resell at 2–3x cost and build a predictable recurring software line into their P&L alongside service revenue.
This model works particularly well for agencies that want non-project income without building their own platform or committing to enterprise licensing minimums.
Standout features for agencies:
- Unlimited contact storage on all paid plans
- Transactional email and marketing email from one account
- White-label reseller program
- Landing pages, forms, and meeting scheduling included
- GDPR-friendly infrastructure (European company, EU data hosting)
Pricing: Free plan includes 300 emails/day. Paid plans start at $9/month for 5,000 emails. Business plan at $18/month includes marketing automation.
4. HubSpot Marketing Hub — Best for Full-Funnel Agencies
Foto: Karolina Grabowska www.kaboompics.com
HubSpot isn’t just an email platform — it’s a full marketing operating system. For agencies that sell beyond email (SEO, paid ads, content, CRM setup), HubSpot gives you a single environment where every piece of the funnel connects. Email performance ties directly into contact records, deal stages, and sales activity, so you’re not stitching together data from four different exports to show a client what’s working.
Custom dashboards can surface traffic sources, email engagement, form submissions, and pipeline value in one view — the kind of report clients can pull themselves without requesting a separate deck. Agencies consistently cite this self-serve visibility as a major factor in long-term retention.
Agency Partner Program
HubSpot’s Solutions Partner Program runs across five tiers (Partner through Elite), with revenue-share percentages and co-marketing access scaling at each level. Even at entry tier, partners receive free sandbox accounts, a dedicated partner portal, and a listing in HubSpot’s Agency Directory — which drives inbound from companies already sold on HubSpot and just looking for someone to implement it.
Standout features for agencies:
- Drag-and-drop email builder with A/B testing
- Smart content (personalization based on lifecycle stage, industry, etc.)
- Multi-touch revenue attribution across channels
- Full CRM, deals, and sales tools included
- 1,500+ integrations via native connectors and App Marketplace
Pricing: Marketing Hub Starter at $20/month for 1,000 contacts. Professional (with full automation and custom reporting) starts at $890/month. Cost is the main barrier for smaller agencies.
5. Mailchimp — Best for Agencies with Beginner-Level Clients
Mailchimp is the platform most small business owners already know, which makes onboarding significantly easier when your client has never used email marketing before. The interface is approachable, the templates are polished, and the learning curve is shallow enough that clients can eventually manage campaigns themselves if that’s the goal.
For agencies, Mailchimp’s multi-user account structure lets you manage client accounts with different permission levels — useful when a client wants to pull their own reports without touching the automations you’ve built.
Where Mailchimp Falls Short
Be direct with clients about the limitations. The automation builder handles straightforward sequences — welcome series, abandoned cart, re-engagement — but breaks down when clients need multi-branch logic or advanced behavioral triggers. Segmentation is less granular than ActiveCampaign or Klaviyo, and large e-commerce catalogs hit the ceiling quickly.
Use Mailchimp for clients under 10,000 contacts with standard nurture needs. If they grow fast or shift toward e-commerce, budget the migration conversation into the engagement upfront.
Standout features for agencies:
- Enormous template library
- Easy client handoff with user permissions
- Basic landing pages and forms included
- Google Analytics and Meta Ads integration
- Predictive demographics and purchase likelihood (on paid plans)
Pricing: Free up to 500 contacts (500 sends/month). Essentials from $13/month. Standard from $20/month includes behavioral targeting and custom templates.
6. GetResponse — Best All-in-One for Mid-Size Agencies
Foto: Ann H
GetResponse sits in an interesting middle ground: more capable than Mailchimp, more affordable than HubSpot, and broader in scope than Klaviyo. The platform includes email marketing, marketing automation, webinars, landing pages, conversion funnels, and SMS — all in one subscription.
For mid-size agencies managing 5–20 clients across different industries, that breadth reduces tool sprawl significantly. The automation builder handles multi-step sequences well, and the webinar functionality is useful for agencies running online events or thought leadership content for clients.
GetResponse MAX for Agencies
GetResponse MAX is the enterprise tier built for agencies and high-volume senders. It includes dedicated IP addresses, advanced segmentation, custom DKIM setup, priority support, and centralized multi-account management under one umbrella. The dedicated IP benefit alone is a concrete performance argument — clients sending at volume see measurable inbox rate improvements that justify the tier upgrade as a results conversation, not just a features upsell.
Standout features for agencies:
- Built-in webinar platform (up to 1,000 attendees)
- Conversion funnel builder for landing pages + email sequences
- AI email generator and subject line optimizer
- GetResponse MAX with agency-specific features
- 24/7 live chat support on all paid plans
Pricing: Email Marketing plan starts at $19/month for 1,000 contacts. Marketing Automation from $59/month. MAX pricing on request.
Quick Comparison Table
| Platform | Best For | Starting Price | Multi-Client | White-Label |
|---|---|---|---|---|
| ActiveCampaign | Complex automation | $15/mo | Yes (separate accounts) | No |
| Klaviyo | E-commerce clients | $30/mo (1K contacts) | Yes | No |
| Brevo | Budget-conscious agencies | $9/mo | Yes | Yes |
| HubSpot | Full-funnel reporting | $20/mo | Yes (partner program) | No |
| Mailchimp | Beginner clients | $13/mo | Yes | No |
| GetResponse | All-in-one mid-size | $19/mo | Yes | Partial (MAX) |
Top Picks by Agency Type
Foto: Ivan S
Every agency has a different client mix, and no single platform wins universally. Here’s how to shortlist quickly:
Run primarily e-commerce accounts? Klaviyo is the clear choice. The revenue attribution and native Shopify sync make client reporting effortless.
Selling full-service digital marketing (not just email)? HubSpot Marketing Hub connects every channel and gives you the reporting depth to prove ROI across the board.
Building a reseller business or watching margins closely? Brevo’s unlimited contact storage and white-label program make it the most cost-efficient foundation for an agency growing its client base.
Working with small business clients who need to self-manage eventually? Mailchimp’s familiarity and gentle learning curve reduce handoff friction and support requests.
Need deep automation without HubSpot’s price tag? ActiveCampaign hits the sweet spot between capability and cost for agencies focused on lead nurturing and lifecycle marketing.
The best email marketing platform for agencies depends less on feature lists and more on what your clients need to see in their reporting. Start with a free trial on your top two picks, build a test campaign using a real client brief, and see which platform your team executes well in consistently.
Most of the platforms above offer dedicated agency onboarding — contact their sales teams directly and ask specifically about multi-client discounts, agency portals, and white-glove setup support. The published pricing is rarely the final number for agencies bringing multiple accounts to the table.
Frequently Asked Questions
What are the key features agencies need in email marketing software?
Agencies need multi-client account management, advanced automation depth, transparent pricing at scale, and robust reporting tools to handle client workflows efficiently and impress stakeholders.
How does ActiveCampaign handle multi-client management?
ActiveCampaign offers separate accounts per client with individual billing and settings, plus a centralized login for quick switching. Agencies managing 10+ clients should negotiate volume discounts directly with sales.
Why is automation depth important for agency email marketing?
Advanced automation lets agencies layer conditions across email engagement, site visits, CRM fields, and purchase history in a single canvas — enabling sophisticated workflows clients expect without custom development.
