Klaviyo vs Postscript

Klaviyo is a web marketing platform for communicating through email, SMS, RCS, mobile push, WhatsApp, and social marketing. Its tools include email automation, audience segmentation, landing pages, A/B testing, and lead capture forms. A helpdesk adds ticket management, customer context, omnichannel support, and AI automation; Klaviyo says its Customer Agent resolves 65% of questions autonomously. The app marketplace offers more than 350 integrations, and developers can build apps and integrations with APIs, webhooks, SDKs, and warehouse syncs. The Free plan costs nothing and includes up to 250 active profiles, 500 email sends per month, $5 of mobile messages per month, and $5 of Composer usage per month. Free access can remain available indefinitely while account limits are maintained, but sending may be paused or restricted if limits are exceeded. Free users receive full email support for the first 60 days. Klaviyo states that it is SOC 2 Type II certified and provides GDPR-related data processing measures and tools, with EU and US data residency. The company was founded in 2012 and is based in Boston, Massachusetts.

Postscript is an agentic retention marketing platform for ecommerce brands using SMS, RCS, email, and future channels. Marketing plans include a visual flow builder, automation templates, subscriber acquisition tools, segmentation, analytics, response management, and custom attribution windows. Its Agentic Context Platform stores brand and customer context so AI agents can act at individual subscriber level, and it is included with every plan at no extra cost. The AI Plan adds Brand Center controls for message tone and knowledge, Infinity Testing for message variants, and Shopper for personalized journeys. Integrations cover ecommerce, email, support, loyalty, reviews, analytics, and workflow automation. Professional includes API access, with documentation for the API, JavaScript SDK, and webhooks. The listed Starter plan is free with a $49 monthly minimum spend; other named plans run from $100 to $699 monthly, while Enterprise pricing is custom. A trial provides $100 credit for 30 days.