Customer.io vs Encharge

Who sends the data: engineers with events, or marketers with a connector

Customer.io treats your product as the source of truth. Its custom events documentation says a track call takes an event name plus a dictionary of properties, that the properties can be nested JSON, and that events can be sent before or after the person is identified. The advice on that page is to send everything that might be useful, because you can ignore data later but cannot use data that never arrived. A workflow then starts from an event, an attribute or segment change, a form submission, an important date, an object update, a relationship change or a webhook, per the automation triggers page.

Encharge offers three routes for the same job, listed in its developer documentation: a Segment.com integration, the Ingest API and JavaScript tracking. The Ingest API is a single POST endpoint that creates or updates a person and records an event; the user object needs an email or a userId, and extra fields become custom fields. That is neat for a backend developer, but the pricing page lists API events and event-based segmentation under Premium, and the Segment integration there too.

So the question is less 'which tool has events' and more 'which plan do you need to use them'. If nobody on your team writes backend code, Encharge Growth lets a marketer connect Stripe and build flows from billing activity without an engineer. If somebody does, Customer.io gives you the same event model from the entry plan.

What Encharge Growth leaves out

Encharge's pricing explanation states that Premium has features Growth lacks, naming the Salesforce, HubSpot and Segment.com integrations and event-based segments. The pricing page adds WooCommerce, Shopify, transactional emails, API events and custom objects to the Premium list, and its comparison table marks the company data model as unavailable on Growth.

That matters for B2B SaaS because the questions a B2B team asks are account-shaped: which companies have three active users, which have an admin who never logged in, which accounts crossed a seat threshold. Customer.io models those with objects: the objects page describes an object as a way to group people, like an account they belong to, and an Object updated trigger can message everyone related to the account. Essentials lists 2 object types and Premium 10. Encharge's equivalent is the company data model plus custom objects, both on its higher plan.

• Growth ($99 a month at 2,000 subscribers, billed monthly) keeps flows, broadcasts, Stripe and Chargebee triggers, A/B tests and unlimited team members.
• Premium ($159 a month at 2,000 subscribers) adds the event, company, CRM, transactional and custom-object features above, plus a higher email allowance (12 times subscribers instead of 10).
• Both plans list unlimited flows, emails, segments, broadcasts and team members, so you never pay per seat or per automation on either side.

Stripe events and CRM sync

Encharge's Stripe integration page describes importing historical billing data when you connect, syncing changes as they happen, and 12 triggers, among them trial started, trial ends, trial converted, trial expired, subscription past due, scheduled cancellation and subscription expanded or contracted. A past-due trigger covers the failed-payment email without any webhook code. Chargebee is also named in the Growth plan's integrations, and the site lists Chargify, Paddle and Recurly as billing connections.

Customer.io's integration directory lists HubSpot, Salesforce, Segment, Intercom and other tools, but we found no Stripe entry on 2026-10-07. The documented way in is the data-in API, so a failed-payment email means a small service that receives Stripe's webhook and forwards an event. For a team that already runs that kind of glue, it is an hour of work; for a team that does not, it is the main reason to prefer Encharge.

CRM sync is the opposite story. In Customer.io's plan features table, Salesforce and HubSpot (both as source and as destination) appear among the Premium and Enterprise integrations, and Premium starts at $1,000 a month billed yearly. In Encharge the same two integrations are on Premium, at $159 to $649 a month depending on the subscriber band. A sales-assisted B2B SaaS that needs CRM sync therefore pays much less for it at Encharge.

Transactional email and deliverability

Customer.io's transactional guide says it does not charge extra for sending transactional messages, and the plan comparison on the pricing page shows transactional email as included on every plan. It also keeps a separate transactional IP pool with stricter bounce and spam thresholds, but a domain added to that pool can no longer send automations or broadcasts, so you need a dedicated sending domain for it.

In Encharge, transactional email is a Premium feature, and the developer documentation describes the Transactional Email API as supplementary to the main automation product. The pages we read show 'Last updated' dates of several years ago, so confirm the current request format before building on it.

On deliverability the vendors differ in what they promise. Encharge says it partnered with Amazon Web Services for sending and offers free one-on-one deliverability management on every account. Customer.io's pricing page marks managed deliverability as not included on Essentials, and its docs warn that new Essentials accounts start at a 500-emails-a-day limit that rises to 10,000 a day after about two weeks of healthy sending, and to the plan's standard limit after about six weeks. Plan a warm-up if you move a large list onto Customer.io Essentials.

Cost at 5,000, 10,000 and 25,000 contacts over one and two years

All figures are list prices from Customer.io's pricing page and Encharge's pricing page, read on 2026-10-07, billed monthly in USD.

At about 5,000 contacts, Customer.io Essentials is $100 a month, or $1,200 a year ($100 x 12) and $2,400 over two years. Encharge Growth is $179 a month ($2,148 a year, $4,296 over two years) and Premium is $269 a month ($3,228 a year, $6,456 over two years). The Premium gap to Customer.io is $169 a month, $2,028 a year.

At about 10,000 contacts, Customer.io is $145 a month, $1,740 a year and $3,480 over two years. Encharge Growth is $249 ($2,988 a year, $5,976 over two years) and Premium is $399 ($4,788 a year, $9,576 over two years). The Premium gap is $254 a month, $3,048 a year.

At about 25,000 contacts, Customer.io's selector has no 25,000 stop; it shows $235 at 20,000 profiles and $325 at 30,000, so a 25,000 list bills between $2,820 and $3,900 a year. Encharge Growth is $389 a month ($4,668 a year) and Premium is $649 a month ($7,788 a year). Even against the top of Customer.io's range, Premium costs $324 more every month ($649 - $325), or $3,888 a year.

A caution on the comparison: the two tools count different things. Customer.io counts every profile, people and objects together, deleted ones included for the period. Encharge excludes unsubscribed and archived people. A list that Encharge reads as 10,000 subscribers might be 12,000 Customer.io profiles once company objects and unsubscribed people are added, which shifts the Customer.io price by the $0.009-per-profile overage or up to the next stop. Work out your count from each vendor's own definition before you trust either figure.

If you raised under $10M, Customer.io's Startup Program takes the first year of the Essentials plan to $0. At 5,000 profiles that removes $1,200 from year one, leaving a two-year Customer.io total of $1,200 against Encharge Growth's $4,296.

Counting rules and caps that change the bill

Customer.io's how-we-bill page uses a high-water model: begin a month with 3,000 profiles, add 250 and delete 50, and you pay for 3,250 even though you end with 3,200. It also warns that an integration which re-adds profiles you just deleted counts them twice. Overage is $0.009 per profile on Essentials ($0.004 on Premium and Enterprise), so 800 profiles above the allotment add 800 x $0.009 = $7.20.

Encharge's cap is different in kind. Each plan has a monthly event limit: 50 times the subscriber limit on Growth (100,000 events at the 2,000 tier) and 100 times on Premium (200,000 at the 2,000 tier, 500,000 at the 5,000 tier). The help article defines an event as a page visit, an API call or a Segment.com event, and says that when you cross the limit the account stops receiving events and is not moved to a higher tier. A product that fires 100 events per active user per month, across 5,000 users, sits exactly on the Premium limit.

Email volume is the other cap. Encharge Premium at 5,000 subscribers allows 12 x 5,000 = 60,000 sends a month. A program of 20 lifecycle and broadcast emails per person (100,000 sends) is 40,000 over, billed at the $100-per-100,000 rate. On Customer.io the same 100,000 sends sit far under the 1 million emails listed for Essentials.

• Encharge help: unsubscribing or archiving people lowers the subscriber count, but heavy archiving combined with fresh imports can get an account reviewed or paused.
• Customer.io fair use: non-email messages (in-app, push, webhook) are unlimited but capped at 60 times your plan's profile count a month.
• Customer.io's plan-features page limits Essentials to two workspaces, and profiles in test workspaces count toward the profile total.

Moving from Customer.io to Encharge

1. Decide the plan first. If any flow starts from a product event, or if companies, CRM sync or transactional email matter, budget for Premium and price your subscriber band on the Encharge pricing page before you start.
2. Export people and attributes from Customer.io, and list every event name your workflows listen for. Event history will not follow the contact file, so segments that depend on old behaviour start empty.
3. Create the matching fields in Encharge and import the file. Encharge counts only people who have not unsubscribed, so import opted-out contacts as unsubscribed instead of leaving them out, which keeps them suppressed without adding to your subscriber count.
4. Connect Stripe on the Stripe integration first; it imports historical billing data and can replace the webhook service you built for Customer.io.
5. Point your backend at the Ingest API with the write key from your account page, mapping each Customer.io event name to an Encharge event. Dates must be ISO 8601.
6. Rebuild each campaign as a flow. Push, in-app and WhatsApp steps have no Encharge equivalent in the pages we read, so decide separately where those messages will live.
7. Move transactional sends last. If you stay on Growth, keep a separate sender for password resets. Encharge also offers free done-for-you onboarding and migration on yearly Premium plans, with a limit on transferred emails and flows, so ask support if that fits.

Moving from Encharge to Customer.io

1. Export your people from Encharge with their custom fields and tags, and write down every event your flows use. Customer.io needs the same event names in its own naming style, so settle a naming convention before the first track call.
2. Decide how companies will be represented. Create an object type for the account in Customer.io, relate people to it, and remember that objects count toward the profile total next to people.
3. Send events from your backend through the data-in API. Include properties you might want later, because they can be used in segments and message content.
4. Replace the Encharge Stripe integration with a small service that listens to Stripe webhooks and forwards the events you want, such as a failed payment or a trial ending, as Customer.io events.
5. Warm up carefully. A new Essentials account starts with a daily limit of 500 emails and reaches 10,000 a day after about two weeks of healthy sending, so ramp your broadcasts instead of sending a full list on day one.
6. Rebuild each flow as an automation, then move transactional mail onto the transactional API. Give it its own sending domain if you want the transactional IP pool.