> ## Documentation Index > Fetch the complete documentation index at: https://docs.omneo.io/llms.txt > Use this file to discover all available pages before exploring further. # Communications Extensions > How Omneo syncs with email and SMS marketing platforms. Omneo integrates with communications platforms to synchronise profile data, preferences, and incentive events, enabling personalised, permission-based customer communications. ## Supported platforms Klaviyo, Emarsys, Salesforce Marketing Cloud (SFMC), Campaign Monitor, Bronto, Responsys, SendGrid, MailChimp, and others via generic webhook/Target integration. ## What comms extensions do ### Profile and preference sync When a customer's profile or communication preferences change in Omneo, the update is pushed to the connected comms platform in real time. This ensures that: * Opt-ins and opt-outs are honoured immediately * Profile attributes (name, birthday, tier, reward balance) are current in your comms platform * Segments based on Omneo data stay accurate ### Incentive notifications via Targets Omneo's Target system sends formatted JSON payloads to comms platform endpoints when incentive events occur. This powers: * Reward issuance emails ("You have \$50 to spend!") * Reward expiry reminders ("Your reward expires in 14 days") * Tier attainment congratulations ("You've reached Gold tier!") * Benefit notifications ("Your birthday gift is ready") ### eReceipts Post-purchase digital receipts are triggered via the comms extension when a transaction is created and an email address is on file. ## How comms extensions are configured Comms integrations use a combination of: 1. **API credentials** for the comms platform (list ID, API key) 2. **Omneo Targets** configured with the comms platform's API endpoint and the Twig template for each notification type 3. **Reactions** that trigger the Targets on the relevant Omneo events 4. **Webhooks** for real-time profile sync Content needed: per-platform Klaviyo and SFMC setup guides with example Target templates.