Customer.io vs Drip

Where the two price lines cross, with yearly arithmetic

Take the selector readouts of 2026-10-07 and multiply by 12. At 5,000 people, Drip is $89 a month, which is $1,068 a year, and Customer.io Essentials is $100, which is $1,200. Drip saves $132. At 10,000 people Customer.io is $145 ($1,740) and Drip is $154 ($1,848), so the order flips and Customer.io saves $108.

The gap then widens with every band. At 20,000 people Customer.io is $2,820 a year and Drip is $3,468, a $648 difference. At 30,000 it is $3,900 against $5,388, a $1,488 difference. At 40,000 it is $4,980 against $7,308, a $2,328 difference. At 50,000 the Customer.io selector shows $505+ a month, so at least $6,060 a year against Drip's $8,388, which puts Customer.io ahead by up to $2,328.

Below 5,000 people the comparison is simply Drip. It reads $39 for 1 to 2,500 people and $49 for a 3,000-person list, while Customer.io shows no plan under 5,000 profiles. For 2,000 people that is 12 x $39 = $468 a year on Drip and $1,200 on Customer.io.

The unit is not identical. Customer.io's billing page says people and objects both count as profiles. A workspace with 9,000 users and 1,500 company objects holds 10,500 profiles. That is 500 over the 10,000-profile plan, and at $0.009 each the overage is 500 x $0.009 = $4.50, billed on the next invoice. The same page says deleted profiles still count for the month, so the number to forecast is the highest count you reach, not the end-of-month count. Drip counts active people and has no object type, so companies cost nothing there; they also cannot be related to users inside the tool.

• Prices are from the Customer.io pricing page and the Drip pricing page, read on 2026-10-07.
• Customer.io Essentials is billed monthly; Premium starts at $1,000 a month billed yearly, which is $12,000. Drip shows a monthly price only.
• Drip reads $209 at 15,000 people and $369 at 25,000; Customer.io's selector has no stop at those sizes in my readout.

Company data: objects against custom fields

A B2B product usually needs three levels of data: the user, the company the user belongs to, and the subscription. Customer.io's objects feature gives the middle level a home. You define an object type such as Companies, create objects through the API, a CSV, reverse ETL or Segment group calls, and relate people to them. Automations can trigger when an object changes or when a relationship is added or removed, and the audience can be the people attached to the object. Objects cannot relate to other objects, and Essentials includes two object types.

Drip's API reference lists resources for subscribers, events, tags, custom fields, segments, workflows, orders, carts and products. It has no company resource. The subscriber carries a lead score, a lifetime value and a user ID, so a Drip setup models an account as a custom field on every user and uses segments to find them. That works for a few hundred accounts. It becomes awkward once you want to message the billing admin of one account when a teammate churns, because there is no object to attach the rule to.

Events, Stripe and billing moments

Customer.io's event documentation describes a name and a data object of any shape. Events can arrive from the JavaScript source, the Pipelines API, the mobile SDKs, a CSV or another automation, and anonymous events are attached after identify. Back-dated events inside the last 72 hours can still start automations. I did not find a Stripe connector page in the Customer.io docs I read, so the usual route for billing is a webhook handler in your backend that sends invoice_failed or plan_changed as events.

Drip's API takes an event with an email or ID, an action name, optional properties, and an occurred_at time; a conversion event carries its value in cents under a value key. Drip also lists a Stripe integration whose key features include adding a tag when a payment completes, removing a tag when a charge is refunded, subscribing someone to a recovery campaign when a payment attempt fails, and subscribing someone to a campaign when a customer signs up for a plan. For a SaaS that mainly needs failed-payment and refund moments, that is a quick start. It carries less data than a custom event with seats and plan.

Replaying history shows the difference in limits. Drip's API reference allows 3,600 individual requests an hour and 50 batch requests an hour, each batch holding up to 1,000 records. A 100,000-event backfill is 100 batch requests, so at 50 an hour it takes two hours. Customer.io sizes batches by bytes, 1 MB on the Pipelines API, and its docs note that events with a timestamp in the last 72 hours can trigger automations, so backfill with care.

Workflows, segments and the 50-workflow ceiling

Drip's automation page describes a builder where you drag triggers, delays and conditions. It offers 20+ ecommerce templates (welcome series, abandoned cart, abandoned browse, post-purchase, win-back) and separates Rules, for one trigger plus one action, from workflows for evergreen multi-step sequences. It caps an account at 50 workflows to protect performance. A SaaS that builds one workflow per lifecycle stage and plan tier can hit that number sooner than a store would.

Customer.io's automation concepts are trigger, goal and exit conditions. Its data-driven segments let you nest AND and OR groups and match against arrays inside event data, such as shipping_addresses[].city. The pricing page names no workflow count. For segment-triggered automations you decide whether people who already match enter immediately or only future matches do, a choice Drip's rules do not ask you to make in the same way.

Pop-ups and ad audiences against push and in-app messages

Drip is a growth tool for the website. Its pricing page lists email, social and onsite pop-ups, onsite campaigns at every list size, and a Facebook Custom Audiences sync that keeps ad audiences aligned with Drip segments. If your trial signups come from landing pages and a blog, those onsite capture tools are included in the price you see.

Customer.io is a tool for the product. Push, in-app and webhook messages are unlimited on every plan with a fair-use ceiling of 60 times the number of profiles on your plan, and WhatsApp and LINE are listed as included. At 5,000 profiles that ceiling is 5,000 x 60 = 300,000 non-email messages a month. Connected forms can also start automations. The usual B2B SaaS split is that Drip captures the visitor and Customer.io talks to the user, and you will rarely need both.

The free year: Startup Program against a 14-day trial

Customer.io's pricing page invites companies that have raised under $10M to apply for a full year free through its Startup Program. At 5,000 profiles a year of Essentials is 12 x $100 = $1,200, and at 10,000 profiles it is 12 x $145 = $1,740. Eligibility is checked by Customer.io, so apply before you commit to another tool.

Drip does not publish a free plan. It offers a 14-day trial with no credit card and then charges from $39 a month. A funded startup that qualifies for the Customer.io year saves more than the Drip price difference at any size below 10,000 people, which turns the cheaper-at-5,000 argument for Drip around for that company during year one.

Moving from Drip to Customer.io

1. Export the people from Drip with their tags, custom fields, lead score and unsubscribe status. I did not confirm the current export screen, so use the export in the app or the subscribers endpoint in the API reference, and keep the unsubscribed list.
2. Choose the identifier and map the columns. The Customer.io CSV import needs an id, email or phone column, accepts files up to 100 MB and processes about 20 to 30 thousand rows a minute. It reserves an unsubscribed attribute, so carry opt-outs across in a column with that name.
3. Turn Drip tags into attributes you can segment on, and create company objects for the accounts users belong to. Import the relationships in a second CSV.
4. Translate each Drip event: the action becomes the event name, the properties become nested data, and occurred_at becomes the timestamp. Keep the names identical so your segments carry over.
5. Replace the Stripe integration with a webhook handler that sends billing events, and rebuild the workflows as automations with goals and exit conditions. Onsite pop-ups have no direct match, so list which ones you keep on another tool.
6. Run both tools on a slice of the list for one sending cycle. Drip is billed monthly, so you can cancel at the next renewal once the new automations behave.

Moving from Customer.io to Drip

1. Check the size of the list first. Drip's migration page says that for lists above 17,500 people it migrates you from your current platform and gives 90 days of onboarding. Smaller lists import themselves.
2. Set the ceiling on what moves. The service moves people with tags, custom fields and segments, up to 5 active workflows on lists under 80,000, up to 3 email templates and up to 3 onsite campaigns. You rebuild everything else, and the account limit afterwards is 50 workflows.
3. Get the people out of Customer.io through the People view, the API or a warehouse connection; I did not find a CSV export article in the docs I read, so confirm the current route in the app. Company objects become a custom field on each user.
4. Load subscribers through the batch endpoint in groups of 1,000. At 50 batch requests an hour, 50,000 people is 50 calls, which fits in one hour.
5. Send opted-out people to the unsubscribes batch endpoint so they are never mailed, then point your product events at Drip's events endpoint, paced under 3,600 requests an hour.
6. Rebuild workflows from the 20+ templates or a blank canvas, and decide which billing events the Stripe integration will cover and which still need custom events.