Klaviyo offers Marketing Agent, an AI-powered tool that autonomously plans and builds complete marketing campaigns — including emails, flows, and audience segments — from a single plain-language prompt entered by a brand marketer. It was unveiled at Klaviyo's K:BOS event in September 2025; Composer, a related agentic campaign-builder, entered private beta in early 2026.

Marketing Agent receives a text prompt describing a campaign goal (e.g., 'run a winback for lapsed VIP customers with a 20% incentive') and outputs a ready-to-review campaign with content, audience targeting, send-time settings, and multi-channel flows. It draws on 14+ years of marketing performance data across Klaviyo's 193,000+ brand customers. Composer, a closely related feature, is in private beta and builds complete structured email and text campaigns through a conversational interface. Both tools use generative AI powered in part by OpenAI and AWS Bedrock, plus Klaviyo's in-house models.