MARKETING AUTOMATION
Customer.io
Paid links. We earn a commission if you buy through links on this page. It never changes our ranking — see how we rank.
Pricing
We do not reprint prices. They change too often for that to be honest, and a number on our page with no date is worse than sending you to the source.
How we rated it
What it is
Messaging automation driven by product events: email, push, SMS and in-app messages triggered by what someone does inside your product.
Who it is for
Software companies whose messaging depends on behaviour — onboarding, activation, win-back.
Where it is strongest
Lifecycle messaging for a product. Sending because someone did or did not do something, rather than because it is Tuesday, is the whole point and this does it properly.
Where it falls short
Requires engineering to send the events in the first place, so there is a real setup cost before anything works. Overkill for a newsletter. And a badly designed event schema makes every later campaign harder.
Our verdict
Recommended for product-led software. The prerequisite is clean event tracking — without it this is an expensive way to send newsletters.
Editorial assessment. We earn a commission on some links; it does not change the ranking.