Klaviyo

Klaviyo is an AI-powered B2C CRM built to help consumer brands turn customer data into personalized, revenue-driving marketing and service experiences. The company was founded in Boston in 2012 by Andrew Bialecki and Ed Hallen, two engineers who met at Applied Predictive Technologies and saw that email marketing tools couldn't talk to real-time store data. Bootstrapped and profitable for its first three years before taking outside funding, Klaviyo grew alongside the Shopify and direct-to-commerce ecosystem, eventually taking a $100 million strategic investment from Shopify in 2022 and going public on the NYSE (ticker: KVYO) in September 2023.

Klaviyo's platform is built around a customer data foundation paired with AI agents designed to act, not just analyze. Composer, its AI marketing agent, can audit a brand's existing flows, segments, and forms and generate an entire on-brand campaign from a single prompt. Customer Agent autonomously resolves customer service questions and can also sell, reportedly handling roughly 65% of inbound questions without human intervention, arriving pre-trained on a brand's data and customizable with specific skills. These sit alongside the core marketing suite, which spans email, SMS, RCS, WhatsApp, mobile push, and social marketing, all built on unified customer profiles that combine behavioral, transactional, and engagement data so every message reflects what a customer has actually done. A Klaviyo MCP Server also lets developers build custom agentic workflows directly on top of this customer data.

Klaviyo serves over 205,000 relationship-driven brands across 100 countries, including well-known names like Glossier, Vans, Dollar Shave Club, Daily Harvest, and Tatcha, alongside 350+ native integrations spanning Shopify, BigCommerce, WooCommerce, Salesforce, and AI platforms like ChatGPT and Claude. The platform is priced on active profile count across Email and Email + SMS plans, starting free for smaller lists and scaling into custom Klaviyo One enterprise pricing for larger accounts, with additional AI-powered products like Customer Hub, Helpdesk, and Marketing Analytics available as add-ons.

Klaviyo is free for up to 250 active profiles and 500 monthly email sends, including core email features with Klaviyo branding and a small SMS credit allotment. Paid Email plans scale by active profile count: approximately $20/month at 500 profiles, $45/month at 1,500 profiles, $100-175/month at 5,000 profiles, $350/month at 10,000 profiles, $400/month at 25,000 profiles, and $720/month at 50,000 profiles, with custom Klaviyo One pricing (adding a 20% surcharge and dedicated account management) required beyond 250,000 profiles or $10,000/month in spend. Email + SMS plans add roughly $15/month per tier over the Email-only price for mobile messaging credits. Additional AI-powered products are billed separately: Customer Hub starts at $20/month (introductory, $30 standard) with a free 30-day trial; Customer Agent AI starts at $140/month (introductory, $200 standard) including 50 free conversations monthly with $0.70 per additional conversation; Helpdesk and Marketing Analytics (from $100/month) are also available as add-ons. Klaviyo does not offer annual billing discounts; all plans are billed monthly.