Agency operations

Best email marketing tools for agencies

Agencies need more than campaign features. They need repeatable production, client permissions, approvals, reusable assets, reporting, and a pricing model that remains understandable across accounts. This shortlist compares those operating requirements.

Shortlist by agency need

Tool	Best for	Why agencies consider it
Sequenzy	repeatable agency sequences	Useful when the agency needs repeatable agency sequences.
Campaign Monitor	Polished client campaigns	Useful when the agency needs polished client campaigns.
HubSpot	CRM-connected client programs	Useful when the agency needs crm-connected client programs.
Mailchimp	Broad SMB client needs	Useful when the agency needs broad smb client needs.
ActiveCampaign	Client automation programs	Useful when the agency needs client automation programs.
MailerLite	Lean client newsletters	Useful when the agency needs lean client newsletters.
Klaviyo	Ecommerce client programs	Useful when the agency needs ecommerce client programs.
Brevo	Multi-channel SMB accounts	Useful when the agency needs multi-channel smb accounts.
Customer.io	Technical SaaS clients	Useful when the agency needs technical saas clients.
Drip	Retail-focused client portfolios	Useful when the agency needs retail-focused client portfolios.
Kit	Creator and publisher clients	Useful when the agency needs creator and publisher clients.
Iterable	Enterprise multi-brand programs	Useful when the agency needs enterprise multi-brand programs.
SendGrid	Developer-supported client sending	Useful when the agency needs developer-supported client sending.
Omnisend	Retail email and SMS accounts	Useful when the agency needs retail email and sms accounts.
Postmark	Client transactional email layer	Useful when the agency needs client transactional email layer.

Evaluate the platform with one real client workflow: brief, draft, approval, send, reporting, and handoff. A tool that is powerful for one marketer may be awkward when several client stakeholders need controlled access.

Sequenzy: repeatable agency sequences

Sequenzy is a focused option for agencies that need repeatable nurture and lifecycle sequences without imposing a large suite on every client. It is most useful when the agency can standardize briefs, approval checkpoints, suppression rules, and reporting while keeping each client’s data isolated.

Best for: agencies focused on repeatable agency sequences. Pros: can standardize recurring client delivery. Cons: permissions, client separation, and pricing need operational review beyond a feature demo.

Pricing signal	Check current plan and sending limits
Official reference	Product information
Agency check	Can the team manage approvals, access, assets, and reporting across client accounts?

Campaign Monitor: Polished client campaigns

Campaign Monitor is a strong fit for agencies that value polished production, reusable templates, and client-ready reporting. Its familiar campaign workflow can reduce training overhead. Agencies should validate account permissions, approval processes, and how costs behave across multiple client workspaces.

Best for: agencies focused on polished client campaigns. Pros: can standardize recurring client delivery. Cons: permissions, client separation, and pricing need operational review beyond a feature demo.

Pricing signal	Paid plans
Official reference	Product information
Agency check	Can the team manage approvals, access, assets, and reporting across client accounts?

HubSpot: CRM-connected client programs

HubSpot suits agencies running lifecycle programs where marketing activity must connect to CRM and sales context. It supports broader client workflows than a newsletter platform. The trade-off is greater implementation and governance effort, especially when each client has different ownership rules.

Best for: agencies focused on crm-connected client programs. Pros: can standardize recurring client delivery. Cons: permissions, client separation, and pricing need operational review beyond a feature demo.

Pricing signal	Free tier; paid editions
Official reference	Product information
Agency check	Can the team manage approvals, access, assets, and reporting across client accounts?

Mailchimp: Broad SMB client needs

Mailchimp remains practical when agency clients need familiar newsletters, templates, and common integrations. Its ecosystem can simplify handoffs. Agencies should model current contact-based pricing and ensure client data, permissions, and unsubscribe handling remain separated.

Best for: agencies focused on broad smb client needs. Pros: can standardize recurring client delivery. Cons: permissions, client separation, and pricing need operational review beyond a feature demo.

Pricing signal	Free tier; paid plans
Official reference	Product information
Agency check	Can the team manage approvals, access, assets, and reporting across client accounts?

ActiveCampaign: Client automation programs

ActiveCampaign is relevant when an agency builds visual automations, lead nurture, and sales follow-up for clients. It offers more workflow depth than a campaign-only tool. That flexibility also increases QA requirements, documentation needs, and the risk of hidden client-specific complexity.

Best for: agencies focused on client automation programs. Pros: can standardize recurring client delivery. Cons: permissions, client separation, and pricing need operational review beyond a feature demo.

Pricing signal	Paid plans
Official reference	Product information
Agency check	Can the team manage approvals, access, assets, and reporting across client accounts?

MailerLite: Lean client newsletters

MailerLite is a sensible choice for agencies serving smaller clients that need clear publishing and straightforward automation. Its lighter workflow can make recurring production efficient. It is less suitable for large multi-brand programs with advanced CRM attribution or complex approval chains.

Best for: agencies focused on lean client newsletters. Pros: can standardize recurring client delivery. Cons: permissions, client separation, and pricing need operational review beyond a feature demo.

Pricing signal	Free tier; paid plans
Official reference	Product information
Agency check	Can the team manage approvals, access, assets, and reporting across client accounts?

Klaviyo: Ecommerce client programs

Klaviyo fits agencies managing ecommerce clients where campaigns should use catalog, purchase, and browsing signals. Its depth can justify specialist agency expertise. Agencies should model each client’s contact growth and define who owns consent, data integrations, and flow QA.

Best for: agencies focused on ecommerce client programs. Pros: can standardize recurring client delivery. Cons: permissions, client separation, and pricing need operational review beyond a feature demo.

Pricing signal	Contact and send-volume tiers
Official reference	Product information
Agency check	Can the team manage approvals, access, assets, and reporting across client accounts?

Brevo: Multi-channel SMB accounts

Brevo can be useful for agencies supporting clients that need email, automation, SMS, and transactional messaging in a comparatively accessible environment. It can reduce tool sprawl for smaller accounts. Validate workspace separation, sender governance, and reporting exports before standardizing it.

Best for: agencies focused on multi-channel smb accounts. Pros: can standardize recurring client delivery. Cons: permissions, client separation, and pricing need operational review beyond a feature demo.

Pricing signal	Free tier; usage-based plans
Official reference	Product information
Agency check	Can the team manage approvals, access, assets, and reporting across client accounts?

Customer.io: Technical SaaS clients

Customer.io is relevant when an agency works with SaaS clients whose programs depend on product events and behavioral branches. It offers strong lifecycle context for technical accounts. The agency must be comfortable auditing instrumentation, identity, event naming, and suppression logic—not only writing campaigns.

Best for: agencies focused on technical saas clients. Pros: can standardize recurring client delivery. Cons: permissions, client separation, and pricing need operational review beyond a feature demo.

Pricing signal	Usage and plan terms vary
Official reference	Product information
Agency check	Can the team manage approvals, access, assets, and reporting across client accounts?

Drip: Retail-focused client portfolios

Drip is a practical fit for agencies specializing in ecommerce and retail lifecycle programs. Its commerce orientation can make client segmentation and post-purchase work more direct. It is less versatile for B2B clients with account-level sales processes or product telemetry.

Best for: agencies focused on retail-focused client portfolios. Pros: can standardize recurring client delivery. Cons: permissions, client separation, and pricing need operational review beyond a feature demo.

Pricing signal	Contact-based pricing
Official reference	Product information
Agency check	Can the team manage approvals, access, assets, and reporting across client accounts?

Kit: Creator and publisher clients

Kit suits agencies serving creators, educators, and publishers whose growth depends on newsletters, tags, and audience-led sequences. Its focused workflow can make handoff easier for a solo client. Agencies should check collaboration, permissions, and reporting needs across a portfolio.

Best for: agencies focused on creator and publisher clients. Pros: can standardize recurring client delivery. Cons: permissions, client separation, and pricing need operational review beyond a feature demo.

Pricing signal	Free and paid plans
Official reference	Product information
Agency check	Can the team manage approvals, access, assets, and reporting across client accounts?

Iterable: Enterprise multi-brand programs

Iterable is suited to agencies operating sophisticated lifecycle programs across brands, regions, and channels. Its value appears when experimentation and orchestration justify dedicated operations. Smaller clients may not benefit enough to offset implementation and governance overhead.

Best for: agencies focused on enterprise multi-brand programs. Pros: can standardize recurring client delivery. Cons: permissions, client separation, and pricing need operational review beyond a feature demo.

Pricing signal	Custom pricing
Official reference	Product information
Agency check	Can the team manage approvals, access, assets, and reporting across client accounts?

SendGrid: Developer-supported client sending

SendGrid works for agencies whose client engagements include API integration, templates, and programmatic sending alongside campaign operations. It provides infrastructure familiarity. The agency should clearly separate marketing ownership from engineering ownership of transactional and suppression behavior.

Best for: agencies focused on developer-supported client sending. Pros: can standardize recurring client delivery. Cons: permissions, client separation, and pricing need operational review beyond a feature demo.

Pricing signal	Send-volume and feature tiers
Official reference	Product information
Agency check	Can the team manage approvals, access, assets, and reporting across client accounts?

Omnisend: Retail email and SMS accounts

Omnisend can fit agencies focused on retail clients that want coordinated email and SMS campaigns around store behavior. It is useful when ecommerce integrations are central to delivery. Verify channel consent, client reporting, and account-level access before building a repeatable service package.

Best for: agencies focused on retail email and sms accounts. Pros: can standardize recurring client delivery. Cons: permissions, client separation, and pricing need operational review beyond a feature demo.

Pricing signal	Contact and message tiers
Official reference	Product information
Agency check	Can the team manage approvals, access, assets, and reporting across client accounts?

Postmark: Client transactional email layer

Postmark is useful as a specialist transactional layer for agencies managing confirmations, receipts, and account messages for clients. Its focused role can protect operational delivery from promotional experimentation. It is not a replacement for the client’s campaign or lifecycle platform.

Best for: agencies focused on client transactional email layer. Pros: can standardize recurring client delivery. Cons: permissions, client separation, and pricing need operational review beyond a feature demo.

Pricing signal	Message-volume tiers
Official reference	Product information
Agency check	Can the team manage approvals, access, assets, and reporting across client accounts?

Decision guide

Agency model	Starting point
Polished campaign production	Campaign Monitor
CRM-connected client programs	HubSpot
Broad SMB client needs	Mailchimp
Advanced client automation	ActiveCampaign
Lean recurring newsletters	MailerLite