diff --git a/src/App.vue b/src/App.vue
index 045a28bf8..cae31dd24 100644
--- a/src/App.vue
+++ b/src/App.vue
@@ -8,6 +8,7 @@
     <funnelFooter />
     <loadingModal :showLoader="shouldShowLoader" :showTextCarousel="shouldShowTextCarousel" />
     <salesforceWebchat />
+    <sierra-webchat />
 </template>
 
 <script>
@@ -16,6 +17,7 @@ import loadingModal from "@/fmg-components/loading-modal/loading-modal.vue";
 import { showFmgLoadingModal } from "@/helpers/loading-modal-helper";
 import funnelFooter from "@/fmg-components/funnel-footer/funnel-footer.vue";
 import salesforceWebchat from "./digital-components/salesforce-webchat/salesforce-webchat.vue";
+import sierraWebchat from "./digital-components/sierra-webchat/sierra-webchat.vue";
 
 export default {
     name: "app",
@@ -38,6 +40,7 @@ export default {
         loadingModal,
         funnelFooter,
         salesforceWebchat,
+        sierraWebchat,
     },
     mounted() {
         showFmgLoadingModal(true);
diff --git a/src/digital-components/sierra-webchat/sierra-webchat.spec.js b/src/digital-components/sierra-webchat/sierra-webchat.spec.js
new file mode 100644
index 000000000..5734eaab8
--- /dev/null
+++ b/src/digital-components/sierra-webchat/sierra-webchat.spec.js
@@ -0,0 +1,84 @@
+import { shallowMount } from "@vue/test-utils";
+import SierraWebchat from "./sierra-webchat.vue";
+
+describe("sierraWebchat.vue", () => {
+    let wrapper;
+
+    beforeEach(() => {
+        wrapper = shallowMount(SierraWebchat);
+        // Mock global window properties
+        window.sierraChat = { openChatModal: jest.fn(), closeChatModal: jest.fn() };
+        window.sierra = undefined;
+        window.SierraChat = undefined;
+        window.embedded_svc = {
+            bootstrapEmbeddedService: jest.fn(),
+            liveAgentAPI: { startChat: jest.fn() },
+            settings: {},
+        };
+    });
+
+    afterEach(() => {
+        wrapper.unmount();
+        jest.clearAllMocks();
+        delete window.sierraChat;
+        delete window.embedded_svc;
+    });
+
+    it("should mount the component", () => {
+        expect(wrapper.exists()).toBe(true);
+    });
+
+    it("calls openSierraChatModal when launchSierraChat is called and script is loaded", () => {
+        const spy = jest.spyOn(wrapper.vm, "openSierraChatModal");
+        // Simulate script already loaded
+        document.body.appendChild(document.createElement("script")).id = "sierra-chat-embed";
+        wrapper.vm.launchSierraChat();
+        expect(spy).toHaveBeenCalled();
+        document.getElementById("sierra-chat-embed").remove();
+    });
+
+    it("calls closeSierraChat when invoked", () => {
+        wrapper.vm.closeSierraChat();
+        expect(window.sierraChat.closeChatModal).toHaveBeenCalled();
+    });
+
+    it("dispatches sierra-chat-closed on handleSierraOnClose", () => {
+        const eventSpy = jest.spyOn(window, "dispatchEvent");
+        wrapper.vm.createSierraConfig().onClose();
+        expect(eventSpy).toHaveBeenCalledWith(
+            expect.objectContaining({ type: "sierra-chat-closed" })
+        );
+    });
+
+    it("dispatches sierra-chat-transfer on handleSierraOnTransfer", () => {
+        const eventSpy = jest.spyOn(window, "dispatchEvent");
+        const transfer = {
+            data: { first_name: "A", last_name: "B", email: "a@b.com", chat_summary: "summary" },
+        };
+        wrapper.vm.createSierraConfig().onTransfer(transfer);
+        expect(eventSpy).toHaveBeenCalledWith(
+            expect.objectContaining({ type: "sierra-chat-transfer" })
+        );
+    });
+
+    it("handles sierra-chat-transfer event and starts Salesforce chat with prepopulated fields", () => {
+        const transfer = {
+            data: {
+                first_name: "A",
+                last_name: "B",
+                email: "a@b.com",
+                chat_summary: "summary",
+            },
+        };
+        const event = new CustomEvent("sierra-chat-transfer", { detail: transfer });
+        window.dispatchEvent(event);
+        expect(window.sierraChat.closeChatModal).toHaveBeenCalled();
+        expect(window.embedded_svc.settings.prepopulatedPrechatFields).toEqual({
+            FirstName: "A",
+            LastName: "B",
+            Email: "a@b.com",
+            Subject: "summary",
+        });
+        expect(window.embedded_svc.liveAgentAPI.startChat).toHaveBeenCalled();
+    });
+});
diff --git a/src/digital-components/sierra-webchat/sierra-webchat.vue b/src/digital-components/sierra-webchat/sierra-webchat.vue
new file mode 100644
index 000000000..0d686202f
--- /dev/null
+++ b/src/digital-components/sierra-webchat/sierra-webchat.vue
@@ -0,0 +1,115 @@
+<template>
+    <div ref="sierraContainer"></div>
+</template>
+
+<script>
+export default {
+    name: "sierraWebchat",
+    methods: {
+        openSierraChatModal() {
+            const sierra = window.sierraChat || window.sierra || window.SierraChat;
+            if (sierra && typeof sierra.openChatModal === "function") {
+                sierra.openChatModal();
+            } else {
+                const launchLink = document.createElement("a");
+                launchLink.setAttribute("data-sierra-chat", "modal");
+                launchLink.style.display = "none";
+                document.body.appendChild(launchLink);
+                launchLink.click();
+                document.body.removeChild(launchLink);
+            }
+        },
+        createSierraConfig() {
+            return {
+                variables: { application: "funnel" },
+                display: "corner",
+                onLoad: () => this.openSierraChatModal(),
+                onOpen: () => {},
+                onClose: () => window.dispatchEvent(new CustomEvent("sierra-chat-closed")),
+                onTransfer: (transfer) =>
+                    window.dispatchEvent(
+                        new CustomEvent("sierra-chat-transfer", { detail: transfer })
+                    ),
+            };
+        },
+        launchSierraChat() {
+            window.sierraConfig = this.createSierraConfig();
+            // Preload CSS if not already present
+            if (!document.getElementById("sierra-chat-embed-css")) {
+                const link = document.createElement("link");
+                link.rel = "preload";
+                link.as = "style";
+                link.href =
+                    "https://sierra.chat/agent/OxY5TbsBlJZsHxIBlJZsmCiQdcXfa2rePO38ZwOlx40/embed-css";
+                link.id = "sierra-chat-embed-css";
+                document.head.appendChild(link);
+            }
+            // Load script if not loaded, otherwise open modal directly
+            if (!document.getElementById("sierra-chat-embed")) {
+                const script = document.createElement("script");
+                script.type = "module";
+                script.id = "sierra-chat-embed";
+                script.src =
+                    "https://sierra.chat/agent/OxY5TbsBlJZsHxIBlJZsmCiQdcXfa2rePO38ZwOlx40/embed";
+                document.body.appendChild(script);
+            } else {
+                this.openSierraChatModal();
+            }
+        },
+        triggerSierraChat() {
+            this.launchSierraChat();
+        },
+        closeSierraChat() {
+            const sierra = window.sierraChat || window.sierra || window.SierraChat;
+            if (sierra && typeof sierra.closeChatModal === "function") {
+                sierra.closeChatModal();
+            }
+        },
+    },
+    mounted() {
+        window.addEventListener("launch-sierra-webchat", this.triggerSierraChat);
+        // Listen for transfer event to close Sierra chat and open Salesforce chat
+        this._handleSierraTransfer = (event) => {
+            const sierra = window.sierraChat || window.sierra || window.SierraChat;
+            if (sierra && typeof sierra.closeChatModal === "function") {
+                sierra.closeChatModal();
+            }
+            // Pass data to Salesforce chat if available
+            const transfer = event.detail;
+            if (
+                window.embedded_svc &&
+                typeof window.embedded_svc.bootstrapEmbeddedService === "function"
+            ) {
+                if (
+                    transfer &&
+                    transfer.data &&
+                    transfer.data.first_name &&
+                    transfer.data.last_name &&
+                    transfer.data.email
+                ) {
+                    window.embedded_svc.settings.prepopulatedPrechatFields = {
+                        FirstName: transfer.data.first_name,
+                        LastName: transfer.data.last_name,
+                        Email: transfer.data.email,
+                        Subject: transfer.data.chat_summary, // for now passing in chat_summery in Subject. But this will be changed in future.
+                    };
+                    // Start chat immediately if required fields are present
+                    if (
+                        window.embedded_svc.liveAgentAPI &&
+                        typeof window.embedded_svc.liveAgentAPI.startChat === "function"
+                    ) {
+                        window.embedded_svc.liveAgentAPI.startChat();
+                        return;
+                    }
+                }
+                window.embedded_svc.bootstrapEmbeddedService();
+            }
+        };
+        window.addEventListener("sierra-chat-transfer", this._handleSierraTransfer);
+    },
+    beforeUnmount() {
+        window.removeEventListener("launch-sierra-webchat", this.triggerSierraChat);
+        window.removeEventListener("sierra-chat-transfer", this._handleSierraTransfer);
+    },
+};
+</script>
diff --git a/src/fmg-components/funnel-header/funnel-header.vue b/src/fmg-components/funnel-header/funnel-header.vue
index d740cbc8b..fc77336d3 100644
--- a/src/fmg-components/funnel-header/funnel-header.vue
+++ b/src/fmg-components/funnel-header/funnel-header.vue
@@ -44,6 +44,7 @@ import { globalEvents } from "@/constants/events";
 import menuModal from "@/fmg-components/funnel-header/menu-modal/menu-modal";
 import progressBar from "@/fmg-components/funnel-header/progress-bar/progress-bar";
 import { webchatHelper } from "@/helpers/webchat-helper";
+import store from "@/store";
 
 // Constants
 const ALERT_DURATION = 3000; // millisecond time to display alert before dismissal
@@ -53,6 +54,7 @@ export default {
     data() {
         return {
             globalAlertMessages: [],
+            sierraChatOpen: false,
         };
     },
     props: {
@@ -71,6 +73,13 @@ export default {
             return this.getCmsContent(this.cmsWidgetName, "LogoImage");
         },
         shouldShowWebchatButton() {
+            // Always update experiment flag before computing visibility
+            this.syncSierraExperimentFlag();
+            // Show if Sierra experiment is active and chat is not open
+            if (this.webchatGlobalNonpersistedState.shouldLaunchSierra) {
+                return !this.sierraChatOpen;
+            }
+            // Otherwise, use Salesforce logic
             return (
                 !this.shouldHideWebchatButtonOnPage &&
                 this.webchatGlobalNonpersistedState.showWebchatButton
@@ -91,8 +100,21 @@ export default {
             this.globalAlertMessages.push(alertToPush);
         },
         webchatClicked(event) {
-            event.preventDefault(); // avoid validation firing
+            event.preventDefault();
             this.launchWebchat();
+            // Only set sierraChatOpen if Sierra experiment is active
+            if (this.webchatGlobalNonpersistedState.shouldLaunchSierra) {
+                this.sierraChatOpen = true;
+            }
+        },
+        syncSierraExperimentFlag() {
+            const experiments = store.getters.applicationUser.experiments;
+            const sierraExp = experiments?.find(
+                (exp) =>
+                    exp.universeName === "CONTENT_FMG_SierraWebchat" &&
+                    exp.settings?.UseSierraChat === "true"
+            );
+            this.webchatGlobalNonpersistedState.shouldLaunchSierra = !!sierraExp;
         },
     },
     components: {
@@ -122,6 +144,14 @@ export default {
             unknownAlertEvent.displayAlert = true;
             this.globalAlertMessages.push(unknownAlertEvent);
         }
+        // Listen for Sierra chat close event to re-enable the chat button if needed
+        this._handleSierraChatClosed = () => {
+            this.sierraChatOpen = false;
+        };
+        window.addEventListener("sierra-chat-closed", this._handleSierraChatClosed);
+    },
+    beforeUnmount() {
+        window.removeEventListener("sierra-chat-closed", this._handleSierraChatClosed);
     },
 };
 </script>
diff --git a/src/helpers/webchat-helper.js b/src/helpers/webchat-helper.js
index f2b624916..917d6de0f 100644
--- a/src/helpers/webchat-helper.js
+++ b/src/helpers/webchat-helper.js
@@ -9,7 +9,7 @@ const webchatGlobalNonpersistedState = reactive({
 export const webchatHelper = () => {
     function launchWebchat() {
         if (webchatGlobalNonpersistedState.shouldLaunchSierra) {
-            // do sierra logic here
+            window.dispatchEvent(new CustomEvent("launch-sierra-webchat")); // launches the sierra chat
         } else {
             window.embedded_svc.bootstrapEmbeddedService(); // launches the salesForce prechat form
         }
diff --git a/src/layouts/payment-method/afterpay-breakout/afterpay-breakout.vue b/src/layouts/payment-method/afterpay-breakout/afterpay-breakout.vue
index abe6221ba..9e98eb9c3 100644
--- a/src/layouts/payment-method/afterpay-breakout/afterpay-breakout.vue
+++ b/src/layouts/payment-method/afterpay-breakout/afterpay-breakout.vue
@@ -1,6 +1,9 @@
 <template>
     <div class="alert fade show my-2 py-2 border-0 alert-info" role="alert">
-        <component :is="'script'" src="https://js.afterpay.com/afterpay-1.x.js" async></component>
+        <component
+            :is="'script'"
+            src="https://js.squarecdn.com/square-marketplace.js"
+            async></component>
         <div class="my-4 alert-heading text-center">
             <span v-html="afterpayHeaderCopy" />
             <span class="afterpay-amount">{{ this.afterpayPrice }}</span>
@@ -10,7 +13,7 @@
             <a
                 id="afterpay-learnmore"
                 href="#"
-                data-afterpay-modal="en_US-safelite"
+                data-afterpay-modal="en_US"
                 data-bind="click:afterpayLearnMore"
                 class="afterpay-learn-more">
                 <img :src="infoIcon" alt="Info Icon" class="info-icon" />
diff --git a/src/layouts/quote/afterpay-modal-banner/afterpay-modal-banner.vue b/src/layouts/quote/afterpay-modal-banner/afterpay-modal-banner.vue
index c40e518df..4c3644cac 100644
--- a/src/layouts/quote/afterpay-modal-banner/afterpay-modal-banner.vue
+++ b/src/layouts/quote/afterpay-modal-banner/afterpay-modal-banner.vue
@@ -1,6 +1,9 @@
 <template>
     <div class="alert fade show my-2 py-2 border-0 alert-info" role="alert">
-        <component :is="'script'" src="https://js.afterpay.com/afterpay-1.x.js" async></component>
+        <component
+            :is="'script'"
+            src="https://js.squarecdn.com/square-marketplace.js"
+            async></component>
 
         <div
             class="mx-4 my-0 alert-heading text-center"
@@ -17,7 +20,7 @@
             <a
                 id="afterpay-learnmore"
                 href="#"
-                data-afterpay-modal="en_US-safelite"
+                data-afterpay-modal="en_US"
                 data-bind="click:afterpayLearnMore">
                 {{ modalCopy }}
             </a>