Klaviyo powers your retention marketing. KPI Tree proves which flows actually retain customers.

Abandoned cart recovery rate measures the percentage of shoppers who abandon their cart but subsequently complete a purchase after receiving a Klaviyo cart abandonment flow. It quantifies the direct revenue impact of your automated recovery messaging and the effectiveness of your abandonment strategy.

Campaign performance comparison evaluates Klaviyo campaigns against each other on engagement, conversion, and revenue metrics. It identifies which campaign types, themes, and strategies consistently outperform others, providing evidence for editorial and promotional planning decisions.

Click-through rate measures the percentage of delivered Klaviyo emails where the recipient clicked at least one link. It indicates how effectively your email content and calls to action drive recipients to take the next step in their customer journey.

Coupon redemption rate measures the percentage of Klaviyo email recipients who use a distributed coupon code to complete a purchase. It quantifies the effectiveness of promotional offers in driving conversions and provides insight into price sensitivity across different customer segments.

Cross-sell email effectiveness measures how successfully Klaviyo cross-sell and product recommendation emails drive additional purchases. It evaluates whether personalised product suggestions in post-purchase flows and campaigns generate incremental revenue beyond what customers would have purchased organically.

Customer journey flow analysis maps how Klaviyo subscribers progress through interconnected automated flows - from welcome series through post-purchase nurture to loyalty and winback sequences. It evaluates whether the overall flow architecture effectively guides customers through their lifecycle.

Customer lifetime value from email measures the total revenue generated over the full customer relationship that is attributable to Klaviyo email and SMS engagement. It connects email programme investment to long-term customer value, providing the ultimate measure of retention marketing effectiveness.

Email attribution analysis evaluates how Klaviyo email and SMS touchpoints contribute to conversions across multi-touch customer journeys. It compares attribution windows, models how email interacts with other channels, and determines whether email initiates, assists, or closes conversions.

Email deliverability rate measures the percentage of Klaviyo emails that are successfully delivered to recipients' inboxes without bouncing. It encompasses hard bounces, soft bounces, and spam folder placement to assess the technical health of your email programme and sender reputation.

Email engagement cohort analysis groups Klaviyo subscribers by their signup date or acquisition source and tracks how their engagement evolves over time. It reveals whether newer cohorts engage as well as older ones and how quickly engagement decays after initial subscription.

Email engagement scoring assigns a composite score to each Klaviyo subscriber based on their open, click, purchase, and recency patterns. It provides a unified view of subscriber engagement that goes beyond any single metric to identify highly engaged, at-risk, and disengaged subscribers.

Email frequency optimisation analyses the relationship between Klaviyo sending cadence and subscriber engagement, conversion, and unsubscribe outcomes. It identifies the optimal frequency for different segments that maximises revenue without accelerating list attrition.

Email list health score is a composite metric combining Klaviyo list growth rate, engagement distribution, bounce rate, complaint rate, and unsubscribe rate to produce a single indicator of overall list quality. It assesses whether your subscriber base is growing, engaged, and deliverable.

Email open rate measures the percentage of delivered Klaviyo emails that were opened by recipients. While affected by Apple Mail Privacy Protection and other privacy features, it remains a useful directional indicator of subject line effectiveness, sender reputation, and brand affinity when tracked consistently.

Email revenue attribution measures the total revenue attributed to Klaviyo email and SMS campaigns and flows within a defined attribution window. It quantifies the direct revenue contribution of your email programme and tracks how that contribution changes over time.

Email ROI measures the return on investment for your Klaviyo email programme by comparing attributed revenue against total email programme costs - including platform fees, design resources, copywriting, and operational overhead. It quantifies the financial efficiency of your entire email operation.

Event-triggered flow performance measures the engagement, conversion, and revenue outcomes of Klaviyo flows triggered by customer behaviour events - such as browse abandonment, cart abandonment, post-purchase, and winback triggers. It evaluates how effectively your automated responses capitalise on behavioural signals.

Flow conversion rate measures the percentage of recipients who enter a Klaviyo automated flow and subsequently complete the desired conversion action - such as a purchase, signup, or re-engagement. It quantifies how effectively your automated sequences drive their intended outcomes.

Form conversion rate measures the percentage of visitors who view a Klaviyo signup form or popup and submit their information. It quantifies how effectively your email acquisition touchpoints convert anonymous visitors into identifiable, contactable subscribers.

List growth rate measures the net rate at which your Klaviyo subscriber list expands over a given period, accounting for new subscriptions, unsubscribes, bounces, and manual removals. It indicates the trajectory of your addressable email audience and the sustainability of your acquisition efforts.

Profile enrichment rate measures the percentage of Klaviyo subscriber profiles that have key data fields populated beyond the basic email address - such as name, preferences, purchase history, location, and behavioural attributes. It indicates how much personalisation data is available for targeting and content customisation.

Repeat purchase rate from email measures the percentage of Klaviyo email-engaged customers who make a second or subsequent purchase within a defined period. It quantifies how effectively your email programme drives purchase frequency and customer retention beyond the initial transaction.

Segment performance analysis compares engagement, conversion, and revenue metrics across different Klaviyo audience segments. It evaluates whether your segmentation strategy effectively identifies distinct audiences with different needs and whether each segment receives appropriately targeted messaging.

Template performance optimisation evaluates how different Klaviyo email template designs, layouts, and structures affect engagement and conversion metrics. It identifies which design patterns - image-heavy versus text-based, single-column versus multi-column, short versus long - produce the best outcomes for different message types.

Unsubscribe rate measures the percentage of Klaviyo email recipients who opt out of future communications after receiving a message. It serves as a direct indicator of message relevance, frequency appropriateness, and the overall health of the relationship between your brand and its subscribers.