# Klaviyo + HubSpot integration > Sync email marketing engagement, contact data, and revenue attribution between Klaviyo and HubSpot automatically — no manual exports required. **Canonical page:** https://tray.ai/connectors/klaviyo-hubspot-integrations/ **Klaviyo connector:** https://tray.ai/connectors/klaviyo-integrations/ **Klaviyo documentation:** https://tray.ai/documentation/connectors/service/klaviyo **HubSpot connector:** https://tray.ai/connectors/hubspot-integrations/ **HubSpot documentation:** https://tray.ai/documentation/connectors/service/hubspot ## Overview Klaviyo and HubSpot do different jobs in your marketing stack. Klaviyo handles behavior-driven email and SMS campaigns for e-commerce. HubSpot manages the full customer lifecycle from lead capture to deal close. When they run separately, marketing teams lose visibility into how email engagement influences pipeline, and sales reps don't have the context they need for relevant conversations. Integrating Klaviyo with HubSpot on tray.ai creates a continuous, bi-directional data loop that keeps both platforms accurate and actionable. Connecting Klaviyo and HubSpot closes the gap between email marketing performance and CRM intelligence. Marketing teams can automatically push Klaviyo campaign engagement data — opens, clicks, purchases, and unsubscribes — into HubSpot contact timelines and custom properties, giving sales teams a real-time view of how prospects are interacting with your brand. New leads captured through HubSpot forms, ads, or deal stage changes can also instantly trigger targeted Klaviyo flows, so every prospect gets timely, personalized outreach without manual list management. The result is tighter revenue attribution, faster handoffs between marketing and sales, and one reliable record for every customer relationship. ## Use cases ### Sync New HubSpot Contacts to Klaviyo Lists When a new contact is created or updated in HubSpot — via form submission, ad conversion, or manual entry — automatically add or update that contact in the right Klaviyo list or segment. Your email audiences stay current without manual CSV imports or list maintenance. Marketers can enroll new leads into nurture flows immediately, without waiting for nightly batch syncs. - Eliminate manual list imports and reduce human error in audience management - Enroll new leads into Klaviyo nurture flows within minutes of HubSpot contact creation - Keep contact properties like lifecycle stage, owner, and deal value in sync across both platforms ### Push Klaviyo Email Engagement into HubSpot Contact Timelines Surface Klaviyo email opens, clicks, bounces, and unsubscribes as activity events on the matching HubSpot contact record. Sales reps can see which campaigns a prospect has engaged with without leaving HubSpot, so they can tailor outreach and prioritize the warmest leads. The enriched contact timeline also improves lead scoring accuracy. - Give sales reps full email engagement context directly inside HubSpot - Improve HubSpot lead scoring accuracy by incorporating Klaviyo behavioral signals - Identify unsubscribes in Klaviyo and automatically suppress outreach in HubSpot ### Trigger Klaviyo Flows Based on HubSpot Deal Stage Changes When a deal in HubSpot moves to a new pipeline stage — Proposal Sent, Negotiation, Closed Won — automatically trigger a corresponding Klaviyo email or SMS flow tailored to that moment in the buyer journey. Marketing communications stay aligned with the sales process without manual campaign launches. Closed-won customers can be enrolled in onboarding or upsell sequences the moment the deal closes. - Align marketing email sequences with sales pipeline milestones - Automatically onboard new customers in Klaviyo the moment a deal closes in HubSpot - Reduce time-to-first-touch for prospects advancing through the sales funnel ### Sync Klaviyo Purchase and Revenue Events to HubSpot Pass e-commerce purchase events and revenue data from Klaviyo into HubSpot deals or contact properties to give your sales and revenue teams a complete picture of customer value. This is especially useful for businesses using HubSpot as their CRM while driving repeat purchases through Klaviyo flows. Attribution reports in HubSpot become far more accurate when they include Klaviyo transaction data. - Attribute revenue accurately across marketing and CRM platforms - Automatically create or update HubSpot deals when a Klaviyo-tracked purchase occurs - Enable customer lifetime value calculations directly within HubSpot reporting ### Unsubscribe and Suppression List Sync When a contact unsubscribes in Klaviyo or is marked as a legal opt-out, their HubSpot record is automatically updated to reflect the correct communication preferences and suppress future outreach. Consistent opt-out data across both platforms is non-negotiable for GDPR, CAN-SPAM, and CASL compliance. This automation prevents marketing emails from reaching contacts who have opted out, protecting your sender reputation and legal standing. - Maintain consistent opt-out and suppression data across Klaviyo and HubSpot - Reduce compliance risk under GDPR, CAN-SPAM, and CASL regulations - Protect sender reputation by preventing emails to opted-out contacts ### Segment HubSpot Contacts Based on Klaviyo Engagement Scores Use Klaviyo's engagement scoring and predicted customer lifetime value data to build dynamic segments in HubSpot for targeted sales outreach and account prioritization. High-engagement Klaviyo subscribers can be automatically flagged in HubSpot for sales follow-up, while disengaged contacts get routed into re-engagement campaigns. This connects email marketing performance directly to CRM-driven sales strategy. - Prioritize sales outreach based on Klaviyo email engagement signals - Automatically route disengaged contacts into HubSpot re-engagement workflows - Create HubSpot smart lists that reflect real-time Klaviyo engagement scoring ### Bi-Directional Contact Property Updates Keep contact properties — job title, company, phone number, and custom fields — synchronized between HubSpot and Klaviyo in both directions, so updates in either platform are reflected automatically in the other. This is particularly useful for B2B e-commerce and SaaS businesses where sales teams update CRM records frequently. One reliable source of contact data improves personalization in both Klaviyo campaigns and HubSpot workflows. - Prevent data drift between HubSpot and Klaviyo contact records - Ensure personalization tokens in Klaviyo emails always reflect the latest CRM data - Reduce duplicate data entry burden on both marketing and sales teams ## Templates ### New HubSpot Contact to Klaviyo List Enrollment Automatically adds every new HubSpot contact to a designated Klaviyo list and syncs contact properties, so new leads are immediately eligible for email nurture campaigns without manual intervention. Connectors used: HubSpot, Klaviyo ### Klaviyo Email Event Logger for HubSpot Contact Timeline Listens for Klaviyo email events — opens, clicks, and unsubscribes — and logs each as a timeline activity on the matching HubSpot contact record, giving sales reps full email engagement visibility without leaving HubSpot. Connectors used: Klaviyo, HubSpot ### HubSpot Deal Stage Change to Klaviyo Flow Trigger Monitors HubSpot deal stage changes and automatically triggers the right Klaviyo email or SMS flow for the associated contact, so marketing communications stay aligned with where each prospect sits in the sales pipeline. Connectors used: HubSpot, Klaviyo ### Klaviyo Purchase Event to HubSpot Deal Creator Automatically creates or updates a HubSpot deal whenever a purchase event is tracked in Klaviyo, passing order value, product details, and customer information so your CRM reflects actual revenue without manual data entry. Connectors used: Klaviyo, HubSpot ### Bi-Directional Unsubscribe and Opt-Out Sync Keeps suppression lists in sync between Klaviyo and HubSpot in both directions. Unsubscribes in Klaviyo update HubSpot communication preferences, and opt-outs in HubSpot are suppressed in Klaviyo, maintaining compliance across both platforms. Connectors used: Klaviyo, HubSpot ### Klaviyo Segment Sync to HubSpot Smart Lists Periodically syncs Klaviyo segment membership into HubSpot contact lists, so sales teams can act on high-value email engagement segments and HubSpot workflows have access to Klaviyo behavioral segmentation data. Connectors used: Klaviyo, HubSpot ## Challenges Tray.ai solves ### Matching Contacts Across Platforms Without a Shared ID Klaviyo and HubSpot use different internal identifiers for contacts, which makes reliably matching records difficult — especially when email addresses aren't unique or have changed over time. Mismatches can produce duplicate records, failed syncs, or engagement data written to the wrong contact. **How Tray.ai helps:** tray.ai uses email address as the primary matching key with fallback logic for phone number or custom external IDs. Built-in deduplication steps check for existing records before creating new ones, so you don't end up with duplicate contacts piling up in HubSpot or Klaviyo. ### Handling High-Volume Klaviyo Event Webhooks at Scale A large campaign send can fire hundreds of thousands of Klaviyo email event webhooks in a short window. Simple integrations buckle under that load, leading to missed or delayed updates to HubSpot contact timelines, incomplete engagement data, and unreliable lead scoring. **How Tray.ai helps:** tray.ai's workflow engine handles high-throughput webhook ingestion with reliable queuing and parallel execution. Workflows process Klaviyo events asynchronously without data loss, and built-in retry logic means transient API failures don't permanently drop contact updates. ### Managing Field Mapping Complexity Between Different Data Models Klaviyo and HubSpot have fundamentally different data models. Klaviyo uses profile properties and custom metrics; HubSpot has contacts, companies, deals, and a structured property taxonomy. Mapping fields between these systems requires careful configuration, and mismatches can corrupt data or break downstream workflows. **How Tray.ai helps:** tray.ai's visual data mapper and built-in transformation functions make it straightforward to translate between Klaviyo's flat profile model and HubSpot's structured CRM schema. Teams can define explicit field mappings, apply conditional logic for property type differences like date formats and boolean fields, and update mappings centrally without rewriting integration code. ### Keeping Suppression and Opt-Out Lists Compliant in Real Time GDPR, CAN-SPAM, and CASL all require opt-out signals to propagate across marketing and CRM systems within strict timeframes. Even a few hours of delay syncing unsubscribes between Klaviyo and HubSpot can result in non-compliant sends that carry real legal and reputational consequences. **How Tray.ai helps:** tray.ai processes opt-out webhook events in near real time, typically within seconds of the unsubscribe action in either platform. Suppression sync workflows run at high priority and include alerting steps that notify compliance or marketing ops teams if a sync failure occurs — so you have both speed and an audit trail when regulators come asking. ### Avoiding Infinite Loops in Bi-Directional Syncs In a bi-directional sync, an update in one system can trigger a webhook that updates the other system, which then fires a webhook back — an infinite loop that burns through API quota, corrupts data, and causes rate limit errors on both platforms. **How Tray.ai helps:** tray.ai breaks the loop through workflow-level flags, custom sync metadata fields, and timestamp comparison logic. Workflows stamp records with a tray-managed last-synced timestamp and source identifier, so each step checks whether an incoming update originated from tray.ai before deciding whether to propagate the change — without suppressing legitimate updates. ## Learn more - Intelligent Integration: https://tray.ai/platform/intelligent-ipaas/ - Merlin Agent Builder: https://tray.ai/platform/merlin-agent-builder/ - Agent Gateway for MCP: https://tray.ai/platform/agent-gateway/ - Book a demo: https://tray.ai/contact/