More impact from every message
Turn customer data into personalized experiences across email, SMS, push, in-app, and more with a platform that gets more powerful over time.
- 14-day free trial
- No credit card required
- Cancel anytime
The customer engagement platform
trusted by 9,000+ brands
80%
See how Attio achieved 80% billing renewal rates by leveraging attributes and dynamic segments
We unify your data, messaging, and AI into a single platform, so every interaction with your customers is stronger and more relevant than the last
Intelligence that compounds. The more you use the platform, the sharper it gets.
Orchestration that scales. One platform for every channel, message type, industry, and geography.
Built for agents, not just humans. Works with any AI tool using MCP, CLI, API or webhooks.
Everything you need to engage customers
Meet your AI Agent
Tell it what you want, and it gets to work so your team spends less time configuring and more time on what matters most.
Support every stage of the customer journey
Retention
Respond proactively to engagement signals and churn risk.
Activation
Guide new users toward meaningful actions using behavioral triggers.
Onboarding
Create welcome flows that ensure new users are ready to take first steps.
Cross-sell & upsell
Personalize cross-sell and upsell campaigns based on product usage.
Infrastructure built for teams and the agents that support them
Trusted to power billions of customer interactions
28%
Increase in click-through rates
22%
Increase in email conversion rates
Customer.io has become the heartbeat of our lifecycle marketing strategy, empowering us to communicate with users in a way that feels genuinely relevant and personal.
3.36%
Drop in cancellations
4.4%
Boost in key app engagement
Because we have every event flowing into Customer.io, we were able to build a journey that adapts to what each user is actually doing—or not doing.
Supercharge your messaging
- 14-day free trial
- No credit card required
- Cancel anytime