Klaviyo

AI-first B2C CRM and marketing automation platform that unifies customer data, messaging channels, and customer service in one place. Enables personalized campaigns across email, SMS, WhatsApp, and mobile push with flow-based automation, behavioral segmentation, and a customer data platform at its core.

Klaviyo powers over 193,000 e-commerce brands and stands out by combining marketing, service, and analytics in a single platform rather than splitting them across separate tools. Offers 350+ native integrations, flexible API-driven data ingestion without rigid schemas, and official SDKs for Node, Python, PHP, and Ruby. Over 300 apps and custom integrations connect via the developer API.

Key capabilities:

• Flow-based automation for welcome series, abandoned cart, post-purchase, and custom triggers
• AI agents for marketing content and customer service with 24/7 support
• Unified profiles and segmentation using behavioral and transactional data
• REST API with Events, Profiles, Metrics, Lists, Campaigns, and Data Privacy endpoints
• Official SDKs for Node, Python, PHP, and Ruby, plus MCP server for AI-assisted integrations

Teams use Klaviyo to sync order and behavioral data from e-commerce platforms, build custom integrations with point-of-sale or inventory systems, and run attribution and reporting. Developers connect via API or SDKs to push custom events, manage profiles and segments programmatically, and pull data into dashboards or downstream systems.