Which Marketing Channels and Integrations Does Klaviyo Support?

Klaviyo supports email, SMS, WhatsApp, mobile push, RCS for Business, reviews, and social marketing, and it offers 400+ pre-built integrations. All channels draw on a shared customer data platform, so messages can respond to what customers actually do in real time. This setup fits B2C brands that want one platform for marketing, service, and analytics rather than separate tools per channel. If your channel mix is mostly offline, direct mail, or marketplaces Klaviyo doesn't connect to, the fit is weaker.

Marketing Channels Available

Klaviyo groups its channels under a single marketing platform, and each message type can be personalized from the same customer profile.

The core idea is that email, text, and push notifications all respond to what customers do in real time, because the data and channels sit in one place. Personalization models decide who to reach, what to say, where to send it, and when, across every channel.

Service and support channels

Customer Agent handles customer service and resolves 65% of questions autonomously, according to Klaviyo. It is pre-trained on your brand on day one and can be customized with skills. A Helpdesk is also part of the service offering, and because service and marketing share one platform, support teams can see the data they need for faster resolutions and upsell opportunities.

Integrations: 400+ Pre-Built Connections

Klaviyo advertises 400+ pre-built integrations. The site does not list them individually on the pages reviewed, so the practical step is to check the integration directory for your specific stack before committing. Typical B2C setups rely on an ecommerce platform, a customer data source, and a helpdesk; confirm each one appears in Klaviyo's integration list.

How the data layer works

Integrations feed a customer data platform (CDP) that Klaviyo describes as giving "the full data story." Klaviyo's models are powered by your customer data plus 9B+ profiles, with controls you can see and adjust. That means an integration isn't just a connector — it's a source that improves targeting and timing across every channel.

What the AI Agents Add

Two agents sit on top of the channel and data layer:

• Composer — the AI marketing agent. It spots revenue opportunities in your customer data, then plans and launches personalized campaigns across channels. You approve every step, and every result is measured.
• Customer Agent — the 24/7 service agent described above, built to resolve questions and support selling.

There is also Remix and an MCP Server listed among the AI tools. If your goal is hands-off campaign planning with human approval gates, Composer is the relevant piece; if your goal is deflecting support tickets, Customer Agent is.

How to Decide If the Channel Mix Fits

Use these conditions to judge fit:

• Strong fit: You sell direct-to-consumer, your customers reach you through email and SMS, and you want service and marketing data in one place.
• Check first: You depend on WhatsApp or RCS in your market — confirm availability and setup requirements for your region and account.
• Weaker fit: Your primary channels are ones Klaviyo doesn't cover, or you need an integration that isn't in the 400+ list.

For pricing and plan limits, see Klaviyo's pricing page; the site also references enterprise and professional support packages. The reviewed pages don't state which channels are included at each tier, so verify channel access against your planned plan before signing up.