Klaviyo
Free tierThe autonomous B2C CRM for AI-powered email, SMS, and omnichannel marketing
Free tier available·All audiences·API available
Key strengths
Omnichannel marketing (email, SMS, RCS, WhatsApp, mobile push, social)AI agents (Composer, Customer Agent) for autonomous marketing and customer serviceUnified B2C CRM with real-time customer data platform350+ pre-built integrationsEnterprise-grade security (SOC 2 Type II, GDPR compliance)Scalable data infrastructure (2.5B events/day, 9B customer profiles, 99.95% uptime)
Free tier + paid plans
Boston, United States
Founded 2012
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Klaviyo — Developer Docs & Integration Notes
- API: Klaviyo provides a public API for managing profiles, events, lists, segments, campaigns, and flows programmatically.
- Key Integrations: Native connectors for Shopify, ChatGPT, and Claude are available; the platform supports 350+ pre-built integrations in total.
- AI Agents: Two embedded AI agents are available to developers building on the platform:
- Composer — autonomous marketing content generation and campaign orchestration.
- Customer Agent — autonomous customer service interaction handling.
- Data Scale: The platform is engineered to handle 2.5B events/day and 9B customer profiles, making it suitable for high-throughput production workloads.
- Channels: Omnichannel delivery APIs cover email, SMS, RCS, WhatsApp, mobile push, and social.
- Security & Compliance: SOC 2 Type II certified; GDPR compliant — relevant for data handling agreements and enterprise procurement.
- Uptime: 99.95% uptime, suitable for mission-critical marketing infrastructure.
- Pricing Model: Freemium. Free tier available; paid tiers scale on contact count and email/SMS channel usage; enterprise pricing available.
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