Klaviyo

Free tier

The autonomous B2C CRM for AI-powered email, SMS, and omnichannel marketing

Free tier available·All audiences·API available

Key strengths

Unified B2C CRM combining marketing, service, and analytics in one platformAI agents (Marketing Agent & Customer Agent) that autonomously create campaigns and resolve support queriesReal-time customer data platform processing 3.7B+ events daily across 8B profiles350+ pre-built integrations covering ecommerce, POS, loyalty, and shippingOmnichannel reach across Email, SMS, WhatsApp, RCS, Mobile Push, and Social

Free tier + paid plans

Boston, United States

Founded 2012

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Custom ecommerce event tracking — Instrument storefronts to fire Klaviyo events (product viewed, cart updated, checkout started) and trigger real-time automated flows via the Events API.
Agentic marketing workflows — Use the Klaviyo MCP Server to connect LLM agents (e.g., Claude, GPT-4) to Klaviyo actions, enabling natural-language campaign creation and data querying.
CDP data unification — Ingest data from multiple sources (POS, loyalty apps, subscription platforms) into KDP to build 360° customer profiles and power cross-channel segmentation.
Programmatic campaign management — Use the Campaigns API to automate the scheduling, cloning, and A/B testing of email and SMS campaigns across large customer segments.
App marketplace development — Build and publish custom integrations on the Klaviyo App Marketplace using OAuth and Klaviyo's developer guides to sync data from third-party platforms.
Real-time personalization — Leverage profile properties and event data via the API to dynamically populate email templates and SMS messages with individualized product recommendations.