Customer.io Pricing in 2026: AI Agent Plans and Profile Bands

Who This Guide Is For

This guide does not rank AI features across vendors. The pricing listings for most of the tools covered here describe plan limits and prices, not AI feature sets. Where a price is the only thing this page can confirm, it says so. Where a vendor's AI scope is unclear, the page tells you what to ask.

How the AI Tier Is Priced

Customer.io's AI features sit in two places on the price list. The first is the Essentials plan, listed from $100 a month, which names AI Agent core skills among its inclusions. The second is Premium, which lists elevated AI Agent limits. Premium's profile volume and pricing are custom, so you cannot read the Premium price from the public listing. You need a quote.

The public listing does not spell out what "core skills" covers or how the Essentials limits compare with Premium. That gap is the main thing to close before buying. Ask the vendor for a written list of AI Agent skills on Essentials, the usage limits that apply to each, and what changes on Premium. A reasonable sales conversation should answer those three questions in writing.

Two points are clear from the listing. First, AI features are not limited to the top tier, because the entry plan includes them. Second, the AI limits rise on Premium, so a team that expects heavy agent use should price Premium early rather than discover the limit after launch.

Customer.io Compared With Other Email Tools

The table below sets Customer.io beside five email tools that have public pricing pages. It lists the entry price with the plan and billing view, then the main limitation for the audience each tool suits best. The AI column is left out on purpose: the public pricing listings for these tools describe plans and limits, not AI feature sets, so this page cannot rank them on AI quality.

The table makes one pattern clear. Customer.io, Klaviyo, ActiveCampaign and Mailchimp all price up as your contact or profile count grows. Brevo and Loops price more on send volume or on subscribed contacts, so the cost curve looks different. The right comparison depends on which of those counts will grow faster for your business.

Customer.io: What It Does Well and Where It Falls Short

What it does well for AI-driven lifecycle email

Customer.io's main strength on this list is that AI Agent features appear on the entry plan. A lifecycle team that wants an agent to help with message work does not have to wait for an enterprise contract to start. The Essentials plan also lists a visual workflow builder, which lets non-engineers map a journey on screen, plus email and community support and basic data integrations.

The pricing structure also rewards teams that already have clean event data. Because Essentials is sold by profile band, a team with a tidy list of active users can match its tier to a known profile count. That is easier to forecast than a model driven by unpredictable send volume.

Where it falls short

The biggest drawback is that profile bands grow in steps, and the step cost rises fast. Moving from the 10,000-profile band at $145 a month to the 50,000-profile band at $505 a month more than triples the bill. A growing list can therefore cost much more than a plan name suggests, especially if nobody reviews the profile count each quarter.

Premium is the other gap. Its profile volume, pricing and AI Agent limits are quoted, so you cannot compare it with other tiers on the public listing. That is fine for an enterprise buyer with a procurement process. It is harder for a small team that wants a number before it talks to sales.

Finally, the public listing names AI Agent core skills without a full breakdown. Until you see the skill list in writing, you cannot judge whether the AI features cover your use case.

Price and pricing page

Essentials is listed from $100 a month, billed monthly. Profile-band pricing for Essentials runs from $145 a month at 10,000 profiles up to $505 a month at 50,000 profiles and above. Premium is quoted. The Startup Program lists 12 months free for eligible early-stage companies that have raised under $10M. Read the Customer.io pricing page for current terms.

What Customer.io Costs at Realistic List Sizes

The table below shows the Essentials profile bands at five list sizes, next to the nearest published price from two other tools at a comparable count. Every figure is a monthly price from the vendor's pricing listing. Where a tool does not list a price for that count, the table says so rather than guessing.

Three worked examples show how the bands add up over a year. A team on the 10,000-profile band pays $145 a month, or 12 × $145 = $1,740 a year. A team that grows to 20,000 profiles pays $235 a month, or 12 × $235 = $2,820 a year. A team at 30,000 profiles pays $325 a month, or 12 × $325 = $3,900 a year. Each step adds roughly $90 a month, so a list that doubles in size can roughly double the yearly bill.

The Startup Program changes the first-year figure for eligible companies. If your team qualifies for 12 months free, the first year on the 10,000-profile band would cost $0 instead of $1,740. Check the eligibility rules on the vendor page before you count on it, since the program is decided by the vendor.

The comparison rows show how Customer.io's entry band lines up with other tools. At 10,000 profiles, Klaviyo lists $150 a month and Mailchimp lists $135 a month for its 5,001 to 10,000 contact band. Customer.io's 10,000-profile band lists $145. The gap is small at that size, so the decision should turn on features and AI scope, not on a few dollars.

Where a tool shows no price for a count, the table says "pricing on request" in the vendor's own terms. ActiveCampaign lists its starting price at 1,000 contacts, not at 10,000, so its price at your count needs a quote. Loops lists a $99 a month Growing Audience plan without a contact band, so its price at your count needs a quote too.

The Other Five Tools, One by One

ActiveCampaign

What it does well: ActiveCampaign puts email marketing, marketing automation, a standard CRM and ecommerce integrations on its Starter plan. For a team that wants sales follow-up and email in one place, that combination is useful. Where it falls short: Starting prices scale with contact count, and the listed Starter price applies at 1,000 contacts. Advanced segmentation is on Pro, which is a step up. Price: Starter $15 a month at 1,000 contacts, Plus $49, Pro $79 and Enterprise $145, all at 1,000 contacts. ActiveCampaign offers a free trial rather than a free plan. ActiveCampaign pricing.

Klaviyo

What it does well: Klaviyo prices by active profiles and has a free plan for up to 250 active profiles and 500 email sends a month, which suits a small ecommerce store. Where it falls short: The price rises with each profile band. The Email+SMS plans are not priced publicly in the listing, so a store that wants text messages needs a quote. Price: Email plan from $20 a month at 500 profiles, $30 at 1,000, $60 at 2,500, $100 at 5,000, $150 at 10,000 and $400 at 25,000, all billed monthly. Klaviyo pricing.

Brevo

What it does well: Brevo's free plan allows 300 email sends a day for up to 100,000 contacts, the most generous contact limit on this list for a free plan. Its Starter and Standard plans add automation and reporting features as you move up. Where it falls short: The free plan's daily send cap is tight for a large list that sends every day, and the listing does not show AI feature detail. Price: Free; Starter $9 a month starting at 5,000 emails a month with no daily limit; Standard $18 a month starting at 5,000 emails a month, with automation, A/B testing and advanced reports. Brevo pricing.

Loops

What it does well: Loops prices on subscribed contacts and includes transactional sends to users outside your audience on its paid plan. It suits SaaS founders who want product email and lifecycle email in one place. Where it falls short: The Early Stage plan caps sends at 4,000 in any rolling 30 days, carries a Loops footer and limits sending to 10 emails per second. The paid Growing Audience plan is $99 a month, but the listing does not state the contact band that price applies to. Price: Early Stage free; Growing Audience $99 a month. Loops pricing.

Mailchimp

What it does well: Mailchimp's free plan covers up to 250 contacts and 500 sends a month, which is useful for a small newsletter or a test list. The Standard plan starts at $20 a month for the 500-contact selector and covers up to 6,000 emails a month at that size. Where it falls short: The free plan is capped at 250 contacts and 250 sends a day, so a growing list hits the ceiling quickly. Standard prices step up with contact count. Price: Free; Standard $20 a month at 500 contacts; Contacts 2,501 to 5,000 at $100 a month; Contacts 5,001 to 10,000 at $135 a month; Contacts 10,001 to 15,000 at $230 a month. Mailchimp also lists a 14-day Standard trial. Mailchimp pricing.

Which Tool Fits Which Need

The table below turns the comparison into a short decision list. Each row names a need, the tool the pricing evidence favors for it, and the reason. The reasons come from the published plan terms above, so you can check each one against the vendor page.

No single row settles the decision. Read the table as a shortlist: find the rows that match your needs, then compare the two or three tools they point to using the price table and the vendor pages.

How to Choose an AI-Capable Email Tool

Start with the question the price cannot answer: what work do you want the AI to do? Some teams want an agent that proposes or runs a journey. Others want help writing subject lines or building segments. The public listings for most tools do not describe these features in enough detail to compare them, so write down the three or four tasks you need before you open any pricing page.

Next, count the thing the plan is priced on. For Customer.io and Klaviyo, that is profiles. For Mailchimp, it is contacts. For Brevo, it is monthly email volume at paid tiers. For Loops, it is subscribed contacts. Pull the number from your current system for the last 90 days, then project it 12 months forward. The price tables above should be read against that projected count, not today's count.

Then test the cost of growth. Doubling your list on Customer.io moves you up one or more profile bands. Doubling your list on Mailchimp moves you up its contact bands. Doubling your list on Loops keeps you on the same plan if subscribers stay within the plan's terms. Compare what happens at your projected size, not at the entry price.

Finally, ask for written answers. Ask Customer.io for the AI Agent skill list on Essentials, the limits that apply to it, and the Premium terms. Ask any vendor whose price at your count is "pricing on request" for a written quote. Keep those answers with the pricing screenshot you used, so the comparison is still correct when the plan changes.

Setup and Migration Checklist

Moving to Customer.io or switching away from it takes more than a plan change. The checklist below covers the steps that most often decide whether the new tool fits. Use it before you sign, and again before you import a full list.

The most common mistake is importing the full old list on day one. Start with the contacts who opened or clicked in the last 90 days, run the top journeys, and then bring in the rest. That keeps the profile count small while you learn the tool, and it protects your sender reputation during the move.

Hidden Costs and Fine Print

Most price surprises come from the unit of measure, not the plan name. Customer.io's listing is organized by profile band, so the first question is what your team counts as a profile. Count it the same way the vendor does, and check whether duplicates, test identities and inactive records count toward the band.

Second, check which features sit outside the listed plan. The Essentials listing names a visual workflow builder, email and community support, and basic data integrations. Anything beyond that, including premium support, premium integrations and elevated AI limits, belongs to Premium, which is quoted. Budget for Premium only after you have a written quote.

Third, plan for the step-ups. On the Essentials profile bands, each step adds about $90 a month between the 10,000 and 40,000 bands. Mailchimp's contact bands show a similar pattern. Brevo and Loops use different measures, so compare their send and subscriber limits directly rather than the headline price.

Fourth, do not assume the free plans carry over. Mailchimp's free plan is capped at 250 contacts. Klaviyo's free plan is capped at 250 profiles. Loops' Early Stage plan is capped at 4,000 sends per rolling 30 days and carries a Loops footer. Brevo's free plan has a 300-send daily cap. Each cap is a reason to move to a paid plan sooner than you expect.

Related Pricing Guides

• Pricing overview: all pricing guides on this site
• Automation and CRM rivals: ActiveCampaign pricing guide
• Ecommerce rivals: Klaviyo pricing guide
• SaaS and volume rivals: Loops pricing guide · Brevo pricing guide · Mailchimp pricing guide
• About this site: about the editorial team

Customer.io Pricing FAQs

How much does Customer.io cost in 2026?

The Essentials plan is listed from $100 a month, billed monthly. Essentials profile bands run from $145 a month at 10,000 profiles to $505 a month at 50,000 profiles and above. Premium is quoted. Check the official pricing page before budgeting.

Which Customer.io plan includes AI Agent features?

Essentials lists AI Agent core skills. Premium lists elevated AI Agent limits and premium support. The public listing does not spell out every skill or limit, so ask for the full list in writing before you buy.

Is there a free option for early-stage startups?

Customer.io lists 12 months free through its Startup Program for eligible early-stage companies that have raised under $10M. The vendor decides eligibility, so confirm it on the pricing page before you plan around it.

How do Customer.io profile bands affect the price?

Each band has a fixed monthly price: $145 at 10,000 profiles, $235 at 20,000, $325 at 30,000, $415 at 40,000 and $505 and up at 50,000 and above, all billed monthly. Moving up a band raises the bill, so count your profiles before you choose.

Which email tools have free plans for small lists?

Mailchimp lists a free plan for up to 250 contacts and 500 sends a month. Klaviyo lists 250 active profiles and 500 email sends a month. Loops lists an Early Stage plan with up to 4,000 sends in any rolling 30 days. Brevo lists 300 email sends a day for up to 100,000 contacts. Customer.io does not list a permanent free plan.

Should I choose Customer.io or a cheaper email tool?

Choose Customer.io if you want AI Agent features in event-driven lifecycle messages and you can manage the profile count. Choose a cheaper tool if you mainly need newsletters or simple automations, or if you do not need an AI agent in the workflow.