Agency buying guide
12 Best Email Automation Tools for Agencies in 2026
Agencies need more than a good email editor: separate client access, an approval step, a data boundary the client can see, and reports that still make sense after handoff. The short answer is HubSpot first when the client wants CRM context and a handoff they keep, ActiveCampaign for detailed branching at a price you can quote per contact, Brevo or MailerLite for small sending programs, and Klaviyo or Drip for stores. The twelve tools below are ranked on those client-management jobs.
How to choose for an agency account
Start from the client’s trigger and the handoff, not the feature grid. Write down the event that starts a journey, the data it needs, the condition that stops it, the person who approves copy and the person who owns the account after launch. The right platform is the one whose own screens make those four things visible to someone who was not in the kickoff call.
Then price the real bill. Seats, contact bands and automation caps change the answer more than the headline plan does: ActiveCampaign limits Starter to 1 user, Mailchimp gives 3 seats on Essentials and 5 on Standard, MailerLite’s free plan has 2 seats, and Kit reserves unlimited users for Pro. Each tool section below links the vendor’s own pricing page next to the numbers it quotes.
| Agency requirement | Evidence to collect | Red flag |
|---|---|---|
| Client separation | One login per person, the client’s own sending domain, and a list export you have actually run | Agency staff sharing the client’s password |
| Approval and handoff | A named approver, a change log, and a runbook the client can follow alone | Only the agency can explain why a branch exists |
| Measurement | One business event per journey and a report the client opens each month | Open-rate screenshots offered as the result |
| Deliverability | SPF and DKIM on the client domain, consent timestamps, a suppression import | The first send going out before domain and list checks |
Which tool to test first, by client type
| Client type | Test first | Why |
|---|---|---|
| B2B services firm with a sales team | HubSpot Marketing Hub | Lead status and deal stage already live in the CRM the journey will read |
| Brief with many branches and exit rules | ActiveCampaign | Branching depth with a per-contact price the proposal can quote |
| SaaS or app with a product event stream | Customer.io | Triggers come from product actions, not list membership |
| Online store, retention retainer | Klaviyo, or Drip for segment-heavy catalogs | Order and browse events feed the flows directly |
| Many small local or newsletter clients | Brevo or MailerLite | Entry prices from $9 and $19, with free plans for pilots |
| Creator, course or publisher | Kit | Tags, sequences and landing pages match how the client already works |
| Enterprise with several channels | Braze, via a scoped proof of concept | Frequency control across channels; quote-based pricing |
Shortlist at a glance
| Tool | Best for | Published pricing (linked page) |
|---|---|---|
| HubSpot Marketing Hub | Clients who want CRM context and a handoff they can keep | Marketing Hub Starter $7, Professional $800, Enterprise $3,600 per month, priced per seat; free tools exist |
| ActiveCampaign | Detailed branching at contact-based prices you can quote | Starter $15, Plus $49, Pro $79 per month at 1,000 contacts; $149, $189 and $375 at 10,000 contacts (billed annually) |
| Customer.io | SaaS and app clients that already send product events | Essentials $100 per month at 5,000 profiles, $145 at 10,000 profiles and $235 at 20,000 profiles; Premium from $1,000 per month |
| Braze | Enterprise clients running cross-channel programs | Pricing on request (quote-based); billing follows the volume of users engaging with the brand |
| Klaviyo | Ecommerce retention clients | Free up to 250 active profiles; Email plan $20 per month at 500 profiles, $30 at 1,000 profiles, $100 at 5,000 profiles and $150 at 10,000 profiles |
| Omnisend | Ecommerce clients who want speed over bespoke logic | Free for 250 contacts and 500 emails a month; Standard $11.20 at 500 contacts and Pro $41.30 at 2,500 contacts, both shown as promotional rates |
| Brevo | Many small client programs on a tight budget | Free plan with 300 email sends a day; Starter from $9, Standard from $18, Professional from $499 per month |
| Mailchimp | Clients whose staff already know the interface | Free for 250 contacts and 500 sends a month; Essentials from $13, Standard from $20 at 500 contacts, Premium from $350 per month |
| MailerLite | Lean newsletters and simple nurture for small clients | Free for 250 subscribers and 2,500 emails a month; Comfort $19 at 1,000 subscribers, $49 at 5,000, $89 at 10,000; Power $39, $69 and $129 |
| Drip | Segment-heavy ecommerce lifecycle clients | $39 per month for 1 to 2,500 people, $89 at 5,000 people and $154 at 10,000 people; 14-day free trial without a credit card |
| Kit | Creator, course and publisher clients | Free up to 10,000 subscribers; Creator $33 at 1,000 subscribers, $75 at 5,000, $116 at 10,000 (billed yearly); Pro $66 at 1,000 |
| GetResponse | Small clients who want webinars and landing pages in one account | Starter $19, Marketer $59, Creator $69 per month at 1,000 contacts ($15.58, $48.38 and $56.58 billed yearly) |
1. HubSpot Marketing Hub: Clients who want CRM context and a handoff they can keep
HubSpot takes the first slot because it answers the question every agency hears at contract end: who owns the logic afterwards? Lead status, lifecycle stage, deals and forms sit in one CRM that the client keeps, so a nurture path that stops when a deal opens is something a sales manager can read without the agency in the room. That readability is worth more to a retainer than one more editor feature.
The price ladder is the constraint. HubSpot’s pricing page lists Marketing Hub Starter at $7, Professional at $800 and Enterprise at $3,600 per month, priced per seat, and its comparison row for email automation gives the free tools 1 automated action, Starter up to 10, and Professional unlimited. Most small-client journeys, such as a lead welcome with a follow-up and a handoff alert, fit inside Starter’s ten actions; a client whose brief has many branches and exit rules is the one who lands on the $800 tier, which only makes sense when the retainer also pays for CRM setup. For the smallest clients, begin on the free tools and their single action, then move up one journey at a time. Prices above come from the HubSpot Marketing Hub pricing page.
| Best for | Pros | Cons |
|---|---|---|
| Clients who want CRM context and a handoff they can keep | Leads, deals and forms in one record the client keeps; Starter at $7 a seat holds up to 10 automated actions for a first journey | Unlimited actions start at the $800 Professional tier; per-seat pricing grows with the agency team |
2. ActiveCampaign: Detailed branching at contact-based prices you can quote
ActiveCampaign fits briefs that contain several paths and explicit exit conditions: a lead sequence that splits on a tag, an onboarding series that waits for a purchase, a follow-up that stops when a deal changes stage. Because the plan is priced by contact count rather than by workflow, an agency can read a monthly platform fee off the contact selector before any build work begins and put that line straight into the client proposal.
Seats and action caps shape the agency decision. ActiveCampaign’s pricing page lists 1 user on Starter and on Plus and 3 users on Pro, and it limits Starter automations to 5 actions each. At 5,000 contacts the selector reads Plus $145 and Pro $205 a month. Four clients of that size on Plus come to 4 x $145 = $580 a month, billed annually, before anyone has built a single branch. Prices above come from the ActiveCampaign pricing page.
| Best for | Pros | Cons |
|---|---|---|
| Detailed branching at contact-based prices you can quote | Branching and tagging depth; the contact selector makes proposals easy to price | Starter caps automations at 5 actions and 1 user; each added branch adds handoff documentation |
3. Customer.io: SaaS and app clients that already send product events
Customer.io is the pick for agencies serving SaaS or app clients whose product already emits events. Messages hang off actions and attributes, such as a project created or a trial day reached, instead of list membership, so the agency can build lifecycle journeys that a plain list tool cannot express.
Budget the instrumentation work as part of the engagement, because a journey is only as good as its event feed. Customer.io’s pricing page lists Essentials at $100 a month for 5,000 profiles, $145 at 10,000 and $235 at 20,000, and Premium from $1,000 a month. Extra profiles cost $9 per 1,000, and a profile that exists at any point in a billing month counts even if it is deleted later, so clean out test data before importing a client’s users. Prices above come from the Customer.io pricing page.
| Best for | Pros | Cons |
|---|---|---|
| SaaS and app clients that already send product events | Event and attribute triggers; Essentials includes 1 million email sends a month | Needs trustworthy event data and a developer to wire it; managed deliverability is not part of Essentials |
4. Braze: Enterprise clients running cross-channel programs
Braze belongs on an agency shortlist only when the client already runs email next to push, in-app and other channels and has data engineers to feed it. The agency’s value there is orchestration design: which channel speaks first, which message suppresses another, and how one customer’s frequency cap holds across all of them.
Braze’s pricing page publishes no price and describes billing as following the volume of users engaging with the brand, so a quote depends on audience size and edition. That makes a small-client pilot a poor use of its contract. Ask for a proof of concept scoped to one audience, with suppression and frequency rules included, and read the quoted audience definition as carefully as the quoted amount. Prices above come from the Braze pricing page.
| Best for | Pros | Cons |
|---|---|---|
| Enterprise clients running cross-channel programs | Cross-channel orchestration for large, data-rich clients | Quote-based, with an implementation and contract weight that suits few agency clients |
5. Klaviyo: Ecommerce retention clients
Klaviyo is the usual default for ecommerce retention retainers because catalog, order and browse events feed the journey directly. Welcome, abandoned cart, post-purchase, replenishment and win-back flows can all key off what a shopper did rather than which list they joined, which gives an agency a repeatable set of flows to deploy and then tune store by store.
Cost tracks profiles. Klaviyo’s pricing page lists the Email plan at $20 a month for 500 profiles, $30 for 1,000 profiles, $100 for 5,000 profiles and $150 for 10,000 profiles, with a free plan of up to 250 active profiles and 500 emails a month. A store that doubles from 5,000 to 10,000 profiles pays $50 more every month, so build that step into the retainer instead of discovering it at renewal. Judge a build on store-integration quality and discount logic, not on how many templates ship. Prices above come from the Klaviyo pricing page.
| Best for | Pros | Cons |
|---|---|---|
| Ecommerce retention clients | Order and browse events drive flows directly; a clear profile-based price ladder | Cost climbs with every profile added; weak fit for clients without a store |
6. Omnisend: Ecommerce clients who want speed over bespoke logic
Omnisend suits agencies serving smaller stores that want welcome, cart, browse and order journeys live quickly and that care about channel reach as much as logic depth. Its free plan covers 250 contacts and 500 emails a month, enough to build a first journey and walk the client through it before a card is entered.
Read the paid prices carefully. Omnisend’s pricing page shows Standard at $11.20 a month for 500 contacts and 6,000 emails and Pro at $41.30 for 2,500 contacts, both as 30%-off first-three-month offer rates, after which billing returns to monthly. Put the post-offer price in the retainer, and remember that SMS is billed separately per message. Move a client elsewhere once the brief needs segmentation that the chosen tier does not include. Prices above come from the Omnisend pricing page.
| Best for | Pros | Cons |
|---|---|---|
| Ecommerce clients who want speed over bespoke logic | A free plan that covers a real first build; ecommerce journeys across email and SMS | Headline paid prices are promotional; advanced segmentation may force a tier jump |
7. Brevo: Many small client programs on a tight budget
Brevo is worth a look when an agency runs many small sending programs and the platform line in each proposal has to stay low. Its free plan allows 300 email sends a day and storage for up to 100,000 contacts, with marketing automation on up to 2,000 of them, and transactional email lives in the same account, so a modest client needs one tool instead of two.
Price the details, not just the entry point. Brevo’s pricing page lists Starter from $9 and Standard from $18 a month, with automation and A/B testing on Standard, and Professional from $499 with 10 user seats. Emails carry a Brevo sticker unless the Remove Brevo logo add-on is bought, which Brevo’s help centre prices at $9 a month. An agency reselling a branded program should add that add-on and the Standard upgrade to the quote. Prices above come from the Brevo pricing page.
| Best for | Pros | Cons |
|---|---|---|
| Many small client programs on a tight budget | Low entry price; marketing and transactional mail in one account | The branding add-on and the Standard upgrade lift the real cost; 10 seats arrive only at Professional |
8. Mailchimp: Clients whose staff already know the interface
Mailchimp earns its place where the client already lives in the interface and mostly needs newsletters plus a handful of straightforward journeys. Hand-over is quick because the client’s own staff may already know the editor, and the free plan, with 1 audience, 250 contacts and 500 sends a month, gives the agency a no-cost sandbox for a first welcome journey.
Seats and tiers matter for client access. Mailchimp’s pricing page shows 3 seats on Essentials, 5 on Standard and unlimited on Premium, and custom-coded templates can be created on Essentials but only sent from Standard upward. Standard starts at $20 a month at 500 contacts, then $100 for 2,501 to 5,000 contacts and $135 for 5,001 to 10,000, so a list that grows quickly outruns the friendly entry price. Prices above come from the Mailchimp pricing page.
| Best for | Pros | Cons |
|---|---|---|
| Clients whose staff already know the interface | A familiar editor lowers client training time; the free plan works as a sandbox | Custom-coded sends need Standard; list growth moves the price quickly |
9. MailerLite: Lean newsletters and simple nurture for small clients
MailerLite suits agencies delivering lean newsletters, lead-magnet follow-ups and simple nurture for clients who will not touch a complicated builder. A small team can learn its editor in an afternoon, and the free plan, with 250 subscribers, 2,500 emails a month and 2 user seats, is enough for a pilot on a client’s real audience.
Its limits show up in branching depth and seat counts rather than in price. MailerLite’s pricing page lists Comfort at $19 a month for 1,000 subscribers, $49 for 5,000 and $89 for 10,000, with Power at $39, $69 and $129 for the same bands, and it states that data is stored in the European Union under an ISO 27001 certificate, which helps with European clients’ procurement questions. Choose it for programs where the work is writing, not wiring. Prices above come from the MailerLite pricing page.
| Best for | Pros | Cons |
|---|---|---|
| Lean newsletters and simple nurture for small clients | Simple editor; EU data storage; a free tier with 2 seats | Not built for deep event data or intricate branching |
10. Drip: Segment-heavy ecommerce lifecycle clients
Drip is built around ecommerce customer states, which makes it a fit for agencies designing segmented retention and post-purchase programs that need more structure than broadcasts but less machinery than an enterprise suite. Even its entry plan lists dynamic segments, onsite campaigns and up to 50 workflows.
Pricing is by people on the list. Drip’s pricing page reads $39 a month for 1 to 2,500 people, $89 at 5,000 people and $154 at 10,000 people, with unlimited email sends. Against Klaviyo’s $100 for 5,000 profiles, Drip’s $89 is the lower figure at that size, so compare both on the client’s real list before assuming the better-known tool is cheaper. Prices above come from the Drip pricing page.
| Best for | Pros | Cons |
|---|---|---|
| Segment-heavy ecommerce lifecycle clients | Segmentation-friendly workflows built around store data; unlimited sends on every tier | Fit depends on store integration quality; slider prices climb steadily with list size |
11. Kit: Creator, course and publisher clients
Kit, the tool formerly sold as ConvertKit, works for agencies serving creators, publishers and course businesses that organise their audience with forms, tags and sequences. The operating model stays close to the creator’s content calendar, so the agency’s deliverables tend to be sequences and landing pages rather than data plumbing.
Know where the free plan stops. Kit’s pricing page offers Free up to 10,000 subscribers with forms, landing pages and broadcasts, but Visual Automations and sequences start on Creator at $33 a month for 1,000 subscribers, $75 for 5,000 and $116 for 10,000, billed yearly. Unlimited users come with Pro, which is $66 at 1,000 subscribers, so an agency that needs several editors on one client account should price Pro from day one. Prices above come from the Kit pricing page.
| Best for | Pros | Cons |
|---|---|---|
| Creator, course and publisher clients | Clear audience, tag and sequence concepts; a free plan that reaches 10,000 subscribers | Automations need a paid plan; limiting for multi-object data and enterprise governance |
12. GetResponse: Small clients who want webinars and landing pages in one account
GetResponse is a candidate when an agency wants email automation alongside landing pages, forms and webinars, so a small client learns one tool instead of three. That breadth helps launch-style programs where an acquisition page, a webinar and a nurture sequence all share a single audience.
Scope control is the real work. GetResponse’s pricing page lists Starter at $19 a month for a 1,000-person list with 1 automation workflow, Marketer at $59 with unlimited workflows and abandoned-cart recovery, and Creator at $69 with webinars and a course creator for up to 500 students; yearly billing brings them to $15.58, $48.38 and $56.58. A client who needs more than one workflow is on Marketer, so quote $59 rather than $19. Prices above come from the GetResponse pricing page.
| Best for | Pros | Cons |
|---|---|---|
| Small clients who want webinars and landing pages in one account | Landing pages, forms and webinars bundled with automation | Breadth can blur the core workflow; only 1 automation workflow on Starter |
Onboarding a client account without surprises
Pick one journey tied to a business event the client already tracks: a booked call, a first purchase, a trial activation or a renewal. Keep the first audience small enough that you can read every send. Before launch, authenticate the client’s sending domain, import consent timestamps together with the list, name the person who approves copy, and decide who may pause the journey when the client’s own team is away.
| Step | Done when |
|---|---|
| Domain and list | SPF and DKIM pass on the client’s domain, and every imported contact carries a consent date and any prior unsubscribe |
| Build | The trigger fires from a test record and the exit rule removes that record from the journey |
| Client review | The approver has signed off on copy, send timing and the report layout in writing |
| Launch | A seed list received the series exactly once, and someone other than the builder knows how to pause it |
| Hand-over | The client has exported the list, holds the admin login and has read the runbook |
For background, the email automation guide covers journey design, the workflow explanation covers how branches are structured, and the metrics guide lists the reporting definitions worth agreeing with a client before launch.
What an agency pilot should actually measure
| Measurement trap | Why it misleads a client | What to report instead |
|---|---|---|
| Vendor demo dashboards | Demo data is tidy; a client’s imported list has duplicates, role addresses and stale rows | Connect the client’s real source before comparing any two report screens |
| Open and click rates | They describe inbox behavior, and the client pays for outcomes | Booked calls, first orders or activations attributed to the journey |
| A free plan as the test bed | Mailchimp’s free plan allows 500 sends a month and Kit’s free plan has no automations, so core trigger work goes untested | Build the pilot on the tier the client would actually pay for |
| A one-week pilot | Too few bounces, replies and unsubscribes arrive to show whether the suppression rules work | Let the first journey run through two full send cycles before widening it |
Mistakes that cost agencies a client account
- Starting three client sequences in the same week with no shared frequency rule, so one subscriber receives all three
- Importing a client’s list without the consent timestamps and the unsubscribe history from the old platform
- Building every account under the agency’s own email address, which leaves the client with nothing to log in to when the contract ends
- Quoting a platform’s entry price when the brief needs a higher tier, such as ActiveCampaign Plus instead of Starter or HubSpot Professional instead of Starter
- Choosing a tool because its template gallery looked good in the sales demo
What a platform line does to a retainer
Platform cost belongs in the proposal as its own line, because it moves with the client’s list and not with your hours. Take five clients with 5,000 contacts each. Klaviyo’s Email plan is $100 a month per store at that size, and a Mailchimp Standard audience in the 2,501 to 5,000 band is also $100. Five accounts on either come to 5 x 100 = 500 dollars a month. MailerLite Comfort is $49 for the 5,000 band, so the same five clients cost 5 x 49 = 245 dollars a month, but with simpler automation and no ecommerce event model.
The ratio, not the total, is what matters. If your fee per client is 1,500 dollars a month, a 100-dollar platform line is under 7 percent of it, while HubSpot Professional at $800 a month is more than half of it. Passing the platform cost through, or choosing the cheaper tier the brief can live with, protects the margin before the first journey is built. Re-run the sum at 10,000 contacts too, where ActiveCampaign Plus reads $189 and Klaviyo $150, so the quote still holds after a good growth year.
Further reading for agency teams
Agencies running ecommerce clients should read the abandoned cart automation and re-engagement automation guides before pricing a retention retainer. Teams selling B2B work can compare this list with the B2B tool list and the B2B email automation guide, and the personalization guide covers the data fields a client has to supply.
Frequently asked questions
Which email automation tool should an agency standardize on?
None for every client. HubSpot is the strongest default when the client wants CRM context and a handoff they keep, ActiveCampaign suits briefs with many branches, Brevo or MailerLite fit small programs, and Klaviyo or Drip fit clients who sell products. Standardize the process instead: a domain checklist, an approval step and a runbook that work on any of them.
What should an agency include in a platform pilot?
One journey in one client account, with a named trigger, a named approver, an exit rule, a business outcome and a pause path that someone besides the builder understands. Record the setup hours and the seat or tier you needed, because those two figures decide whether the platform fits a retainer.
How should agencies compare pricing?
Count seats, contact bands, automation caps and add-ons for each client, then add the next realistic growth band. ActiveCampaign Plus reads $145 a month at 5,000 contacts and $189 at 10,000, while Klaviyo’s Email plan reads $100 and $150 at the same sizes, so the cheaper tool can change as the list grows.
Who should hold the account login, the agency or the client?
Create each account under the client’s own business email and add agency staff as users. The client then keeps the login, the sending domain and the exported list if the contract ends, and the agency avoids being the single point of failure for someone else’s email.