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Keeping customers · 5 of 252 stories

Customer.io

A customer messaging platform: it sends automated email, push, SMS and in-app messages to each user, triggered by the user's profile data and actions in a product.

What Customer.io is

Written from its maker's own pages, read on 28 October 2026.

Customer.io is a customer engagement platform made by Peaberry Software, Inc. It sends automated messages, such as email, push notifications, in-app and web messages, SMS and webhooks, and each message is driven by the profile and event data that a business sends about its users. An event is a record of something a person did, such as signing up or making a purchase.

Data comes in from several sources: a JavaScript client snippet placed on a website, mobile SDKs for iOS, Android and other platforms, REST APIs, server libraries and data warehouses. Segments group people by these data. Journeys, built in a visual workflow builder, are automated campaigns with triggers, timing and logic that decide which message each person gets and when. The platform also sends transactional emails and includes a drag-and-drop message editor, analytics and an AI agent that builds automations from a written request.

Customer.io is a hosted service sold as a subscription, priced by the number of profiles (people and objects) and emails, with a 14-day free trial.

Made by
Peaberry Software, Inc.
Price
From US$100 a month for the Essentials plan (5,000 profiles), billed monthly (read 28 October 2026)
Free plan
free trial only (14 days)

Who uses it, and for what

One row per story. The grade is for the claim that the business uses this tool, not for its revenue.

StoryWhat it does thereWhenCost statedGradeSource
Faceless.videoCustomer messaging script in the Bubble application, seen in the August 2024 copy of the site.BInternet Archive copies of faceless.video, 23 July 2023 and 15 August 2024
Rank PromptMessaging platform whose assets the website preloads; the exact use is not stated.BRank Prompt home page
My AskAISends the email flows and other messages to customers.CStarter Story, 18 June 2024, interview with Mike Heap: I Built A $300K/Year AI Business For Less $50 Bucks
ChatSEOSends marketing email based on usage events, after the user's consent.CChatSEO: Sub-processors, with a change log to 1 September 2026
Wave AISends the product, lifecycle and transactional emails.CWave Data Processing Addendum, Annex 3: subprocessors and vendors

Grade A: the tool's maker or a payment processor confirms the use. Grade B: an independent report, or the tool is visible in public code. Grade C: the founder or the company says so.

Used in the same businesses

Other tools in the stories above, with the number of stories that share both.

Other tools for the same job

Keeping customers, with the number of stories that use each.

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