Customer.io vs ActiveCampaign: unlimited seats and monthly billing, or a lower annual price?
Email marketing and CRM platforms · Verified · By Joonas Rotko
Customer.io
Desk research
From Essentials, billed monthly
$100/mo
ActiveCampaign
Desk research
From Starter, billed annually
$15/mo
vs
Quick answer
The two quote prices on different bases, so I don't set them against each other. Customer.io's Essentials is $100/month billed monthly, with unlimited seats and SMS, push and WhatsApp included. ActiveCampaign publishes annual-billed rates only: Starter is $15/month billed annually at 500 subscribers and $79/month billed annually at 5,000, and a 3-seat team needs Pro. I'd pick ActiveCampaign for a small business that can commit to a year, and Customer.io if you must pay monthly or need multi-channel messaging. Prices verified 1 Oct 2026.
Across the three setups below: ActiveCampaign in 3 of 3 scenarios.
Which one fits you?
Solo marketer or small business, a list just past the free tier
ActiveCampaign
My pick
$15/mobilled annually
At 500 subscribers, ActiveCampaign's Starter is $15/month billed annually. Customer.io's Essentials is $100/month billed monthly. They are not the same basis, but the price points are far apart and Starter is the lower of the two.
Why this pick, and when to skip it
The two quote prices on different bases (ActiveCampaign annual-billed, Customer.io monthly), so I lean on the much lower entry price and the CRM bundled into Starter.
Skip it if you need SMS, push, or native WhatsApp bundled into the entry price, or you want to pay month to month. Customer.io ships all of that on Essentials from day one; ActiveCampaign's Starter buys email marketing plus a cap of 5 actions per automation and a single seat.
At 5,000 subscribers, ActiveCampaign's Starter is $79/month billed annually. Customer.io's Essentials is $100/month billed monthly at this size. I don't subtract one from the other, because they are not the same basis; Starter is the lower figure of the two, and it covers a one-person list.
Why this pick, and when to skip it
The two quote prices on different bases, so I lean on ActiveCampaign's lower annual-billed price and its CRM and ecommerce tools for a small business.
Skip it if you must pay month to month or need multi-channel messaging. Customer.io is the only one of the two with a monthly rate, and it includes SMS, push and WhatsApp on Essentials. Customer.io's rate also rises above 5,000 profiles, so check its own calculator for a larger list.
Three seats push ActiveCampaign up from Starter and Plus, both capped at 1 seat, to Pro, which includes 3 seats at $79/month billed annually. Customer.io's Essentials includes unlimited seats at $100/month billed monthly. The bases differ, so I don't subtract; Pro is still the lower figure.
Why this pick, and when to skip it
The two quote prices on different bases, so I lean on ActiveCampaign's lower annual-billed price for three seats, with Customer.io the choice if you need monthly billing or unlimited seats.
Skip it if you have to bill monthly, or seats will keep growing: Customer.io is the only one of the two with a monthly rate, and its seats are unlimited on every tier. ActiveCampaign includes 3 seats on Pro and 5 on Enterprise, and doesn't publish a per-seat price for more.
How are Customer.io and ActiveCampaign really different?
Entry price at a small list, and which billing basis shows it
Customer.io
Essentials is $100/month billed monthly, monthly billing only. No annual rate is published for it.
ActiveCampaign
Starter is $15/month billed annually, annual billing only. ActiveCampaign publishes no monthly rate on any plan.
Each tool's published price sits on a different billing basis, so there is no like-for-like number to subtract. Customer.io is the only one that lets you pay month to month.
Team seats on the entry tiers
Customer.io
Essentials includes Unlimited seats, same as Premium and Enterprise.
ActiveCampaign
Starter and Plus both include only 1 seat; a second person requires Pro's 3 seats, since no extra-seat price is published for the lower tiers.
A 2-person team on ActiveCampaign has no cheaper path than jumping straight to Pro; the same team stays on Customer.io's cheapest plan.
Automation depth on the entry tier
Customer.io
Essentials includes the full workflow builder, with no automation-step cap stated.
ActiveCampaign
Starter caps every automation at 5 actions per automation; Plus and up remove the cap entirely.
ActiveCampaign's entry tier reads more like a taste of the platform than a working automation plan; Customer.io's entry tier doesn't hold automation depth back.
Billing options
Customer.io
Monthly billing on Essentials. Premium is a starting-at figure sold through a demo call, billed yearly, and Enterprise has no published price.
ActiveCampaign
Annual billing only, on all four plans. The pricing page has no monthly/annual toggle.
If you need monthly billing, only Customer.io's Essentials offers it. If you can commit to a year, ActiveCampaign's published annual rates are the lower figures at these list sizes.
Refund terms
Customer.io
No money-back guarantee. Customer.io's terms of service call fees non-refundable outside of legal requirements.
ActiveCampaign
A 30-day money-back guarantee, but only on a customer's first-ever paid subscription.
ActiveCampaign gives new customers a real refund window; Customer.io gives none at any point.
What will Customer.io or ActiveCampaign cost for your setup?
The cheapest plan that covers each setup, add-ons included. Prices exclude VAT.
Solo marketer or small business, a list just past the free tier
500 subscribers · mailed 3 times a month (for tools priced by emails sent) · 1 user
ToolMonthlyYearly, per month
Customer.io
$100
Monthly only
Essentials
Above 30,000 subscribers: nothing published fits.
ActiveCampaign
My pick
Annual only
$15
Starter
Above 25,000 subscribers: Plus (+$434/mo, billed annually).
For each tool I price every current plan plus the add-ons a setup needs, from the vendor's published prices only, and take the cheapest. Monthly and annual billing are priced separately. When a limit or price isn't published, the tool shows as not fitting instead of a guess.
Solo marketer or small business, a list just past the free tier: A list of about 500 contacts, just past the free tiers most vendors offer. One login. Tools priced by emails sent are costed at three mailings per subscriber a month.Customer.io, annual billing: Not sold on annual billing. Price limit isn't published.ActiveCampaign, monthly billing: Not sold on monthly billing.
Growing list, sending regularly: A list of 5,000 contacts, sending regularly. One login. Tools priced by emails sent are costed at three mailings per subscriber a month.Customer.io, annual billing: Not sold on annual billing. Price limit isn't published.ActiveCampaign, monthly billing: Not sold on monthly billing.
Small team managing one list together: Three people logging in to the same 1,000-contact list. Seats, not list size, are the deciding limit. Tools priced by emails sent are costed at three mailings per subscriber a month.Customer.io, annual billing: Not sold on annual billing. Price limit isn't published.ActiveCampaign, monthly billing: Not sold on monthly billing.
Customer.io vs ActiveCampaign side by side
I compare email/CRM platforms on: Real cost per list size, both billing bases; Free-tier contact ceiling before you must pay anything; Team seats included, and the seat price past that; List segmentation depth; Automation workflow depth and any step/action limits; Deliverability and sending limits (emails per month, per day, or per rolling window); CRM and ecommerce integration depth; What happens past your plan's contact ceiling (overage pricing vs a forced upgrade).
Customer.io and ActiveCampaign compared on the main buying criteria
Criterion
Customer.io
ActiveCampaign
Free plan or trial
No free plan. A 14-day trial covering every channel, capped at 5,000 messages.
No free plan. A 14-day trial, confirmed no card required.
Entry price, and which billing basis is quoted
Essentials: $100/month billed monthly; no annual rate published for this tier.
Starter: $15/month billed annually; no monthly rate published for any plan.
Team seats included
Unlimited on every tier, Essentials through Enterprise.
1 on Starter and Plus, 3 on Pro, 5 on Enterprise.
Automation depth by tier
Workflow builder included on every tier, no step cap stated.
5 actions per automation on Starter; unlimited actions from Plus up.
Channels beyond email
SMS, push, in-app, and native WhatsApp all included on Essentials, volume negotiated as "Custom" rather than a flat quota.
Not published: ActiveCampaign's pricing page doesn't break out SMS, push, or WhatsApp by tier.
All details, including automation and AI workflows
All compared details for Customer.io and ActiveCampaign
Criterion
Customer.io
ActiveCampaign
API access and integrations
Unlimited API calls on every tier. Integrations split into "Basic" (Essentials) versus "Basic & Premium" (Premium, Enterprise), without naming which specific tools sit in each bucket.
API and webhooks, plus Zapier, confirmed on every plan including Starter. CRM and ecommerce integrations scale by tier, from standard on Starter and Plus up to premium on Enterprise.
Trial terms
14 days. Whether a card is required isn't stated on any Customer.io page.
14 days, confirmed no card required.
Refund / money-back terms
None. Fees are non-refundable per the terms of service, outside of legal requirements.
30 days, but only on a customer's first-ever paid subscription; excludes SMS/WhatsApp credit subscriptions.
Full price ladder
Essentials: $100/month billed monthly up to 5,000 profiles, rising in steps above that, monthly billing only. Premium: a starting-at figure behind a demo call, billed yearly, not a self-serve checkout price. Enterprise: Custom, no floor published at all.
Starter: $15/month billed annually. Plus: $49/mo. Pro: $79/mo. Enterprise: $145/mo. All four are annual-billed only, at the 1,000-contact entry band, and rise with contact count. Above 50,000 contacts ActiveCampaign says to talk to sales.
How pricing scales
Contact-count tiered on Essentials' published table, up to 30,000 profiles; Premium and Enterprise move to negotiated, unpublished pricing.
Contact-count tiered on every plan: Starter up to 25,000 contacts, Plus, Pro and Enterprise up to 50,000, all on annual billing. Above that ActiveCampaign says to talk to sales.
CRM and ecommerce integration depth
Integrations are split into "Basic" (Essentials) versus "Basic & Premium" (Premium, Enterprise) data integrations, without naming Segment, Zapier, Salesforce, or HubSpot specifically by tier.
Named and tiered: standard CRM and ecommerce integrations on Starter and Plus, standard CRM with premium ecommerce on Pro, premium CRM and ecommerce on Enterprise. An Enhanced CRM add-on (pipelines, sales engagement) is available from Plus up, not on Starter.
White labeling
Not published for any tier.
Full white-labeling (custom domain, CSS/HTML rebrand, removed ActiveCampaign references) is Enterprise-only, at no extra fee. Lower tiers can only remove the ActiveCampaign logo through a settings checkbox, with no domain or CSS control.
Workspaces
2 on Essentials, unlimited on Premium and Enterprise.
Not a concept ActiveCampaign's pricing page uses.
Overage and extra-seat pricing
Essentials charges a small per-profile fee for extra profiles and a per-1,000 fee for extra emails. No per-seat charge on any tier, since seats are unlimited.
Extra seats can be purchased in-app past what's included, but no per-seat price is published; help-center docs confirm the purchase flow without naming a number, and third-party estimates for it disagree, so it's left unverified rather than stated as a figure.
Segmentation depth by tier
Not broken out by tier for Customer.io.
Limited on Starter, standard on Plus, advanced on Pro, premium on Enterprise, per ActiveCampaign's own pricing page labels.
Who should pick Customer.io, and who should pick ActiveCampaign?
Customer.io
Desk research
Customer.io only publishes one real number: $100/month billed monthly for Essentials, capped at 30,000 profiles. Everything past that is a quote, with Premium starting at $1,000/month billed annually and Enterprise not even showing a floor.
Best for: A team that has outgrown a basic email tool and needs cross-channel journeys (email, SMS, push, WhatsApp) with unlimited seats on the entry plan.
Strengths
Unlimited seats and unlimited API calls on every tier, including Essentials.
SMS, push, WhatsApp and webhooks all ship on the entry plan, not gated to a higher tier.
A 14-day trial that includes every channel, not a stripped-down preview.
Limits
No money-back guarantee. The terms of service call fees non-refundable outside of legal requirements.
Premium has no self-serve checkout, only a demo call, and its $1,000/month billed annually figure is a starting point, not a fixed price.
Enterprise publishes no price at all, just a sales conversation.
Skip it if you want a fixed monthly bill past the entry tier; Premium and Enterprise both require a sales call and a negotiated price.
ActiveCampaign prices by contact list size on top of the plan tier, and the plan cards only show the annual rate; there's no published monthly-billing number to compare against. Starter caps you at 5 actions per automation and one seat, so it reads more like a taste of the platform than a real working plan.
Best for: A small business that wants CRM and ecommerce integrations bundled with email marketing from the entry tier.
Strengths
API and webhook access on every plan, including Starter.
Zapier is available on every plan, not gated to the top tier.
A 14-day trial with no card, plus a 30-day money-back guarantee on the first paid subscription.
Limits
Starter automations are capped at 5 actions per automation; Plus and up remove the cap.
Full white-labeling (custom domain, CSS/HTML rebrand) is Enterprise-only.
The Enhanced CRM add-on (pipelines, sales engagement) isn't offered on Starter at all.
Skip it if you need more than 5 actions per automation or a second seat without upgrading past Starter.
Pick it if you want a simpler, cheaper general email marketing tool and don't need Customer.io's multi-channel messaging or ActiveCampaign's CRM depth.
Pick it if you want SMS and transactional email bundled with marketing email under one account, at a lower published entry price than either tool here.
Neither vendor documents a migration tool, import fee, or list-transfer guarantee for this switch, so this stays qualitative: expect to rebuild segments, automations, and templates by hand in either direction. ActiveCampaign's 14-day trial needs no card, confirmed on its own pricing page, so you can test a rebuild there without a billing risk. Customer.io's 14-day trial covers every channel, but whether it requires a card isn't stated on any Customer.io page.
What would change my pick?
ActiveCampaign adding a monthly-billing option, or Customer.io publishing an annual rate, would let me compare the two on the same basis, and could change the picks.
Customer.io publishing a fixed, self-serve price for Premium rather than a demo-call starting point would fill the biggest gap in its own price list.
A price change on either side. The scenario picks and tokens recalculate when a vendor changes a price.
Customer.io vs ActiveCampaign: questions people ask
Is Customer.io cheaper than ActiveCampaign?
They quote prices on different bases, so I don't set one against the other. Customer.io's Essentials is $100/month billed monthly. ActiveCampaign's Starter is $15/month billed annually at 500 subscribers and $79/month billed annually at 5,000 contacts. ActiveCampaign's figures are lower at the sizes I looked at, and Customer.io is the one with monthly billing.
Why does ActiveCampaign's price depend on whether I bill monthly or annually?
It doesn't: ActiveCampaign publishes annual-billed rates only. Every plan reads as a per-month rate billed annually, and there is no monthly/annual toggle on the pricing page. So there is no monthly price to compare with Customer.io's Essentials, which is monthly only.
Which has more team seats on its cheapest plan?
Customer.io. Its seat allowance on Essentials is the same as on every other tier: Unlimited. ActiveCampaign's Starter and Plus both cap at 1 seat; a second person requires upgrading to Pro.
What does a 3-person team pay on each tool?
ActiveCampaign's seat cap pushes the team to Pro, $79/month billed annually. Customer.io's Essentials is $100/month billed monthly, with unlimited seats. The bases differ, so I don't subtract. If you can commit to a year, Pro is the lower figure; if you need monthly billing, Customer.io is the one that offers it.
Does either tool have a money-back guarantee?
ActiveCampaign does: 30 days, but only on a customer's first-ever paid subscription. Customer.io has none; its terms of service call fees non-refundable outside of legal requirements.
Which is better for SMS, push, or WhatsApp messaging?
Customer.io, based on what each pricing page publishes. SMS, push, in-app messaging, and native WhatsApp are all included on Essentials, its entry tier. ActiveCampaign's pricing page doesn't break these channels out by tier at all, so there's nothing to compare them against.
Is ActiveCampaign's automation more limited than Customer.io's?
Only on Starter. ActiveCampaign caps every automation on Starter at 5 actions per automation, then removes the cap entirely from Plus up. Customer.io's workflow builder ships uncapped on Essentials, its cheapest tier.
How I verified this
Every price and limit here comes from the vendors' own pages, last checked . Customer.io: desk research. ActiveCampaign: desk research.
: New page. I pick ActiveCampaign in all three scenarios, with a tiebreaker on each: ActiveCampaign publishes annual-billed rates only and Customer.io publishes monthly rates only, so the two are described on their own bases and not subtracted. Customer.io is the pick if you must bill monthly or need multi-channel messaging and unlimited seats.
Spot something out of date?Vendors and readers, send me the correct fact.⌄
Software sites change almost every week, and I want every claim on this page to be factually correct. If you are a vendor or a reader, send me the correct fact and a link to the official page. I will check it and update the page. The opinions and rankings stay mine.
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