diff --git a/app/javascript/dashboard/components-next/Editor/Editor.vue b/app/javascript/dashboard/components-next/Editor/Editor.vue
index 671a628dc..6b5fefab9 100644
--- a/app/javascript/dashboard/components-next/Editor/Editor.vue
+++ b/app/javascript/dashboard/components-next/Editor/Editor.vue
@@ -41,6 +41,8 @@ const props = defineProps({
     default: 'info',
     validator: value => ['info', 'error', 'success'].includes(value),
   },
+  enableVariables: { type: Boolean, default: false },
+  enableCannedResponses: { type: Boolean, default: true },
 });
 
 const emit = defineEmits(['update:modelValue']);
@@ -116,6 +118,8 @@ watch(
         :placeholder="placeholder"
         :focus-on-mount="focusOnMount"
         :disabled="disabled"
+        :enable-variables="enableVariables"
+        :enable-canned-responses="enableCannedResponses"
         @input="handleInput"
         @focus="handleFocus"
         @blur="handleBlur"
diff --git a/app/javascript/dashboard/components-next/NewConversation/ComposeConversation.vue b/app/javascript/dashboard/components-next/NewConversation/ComposeConversation.vue
index b5d57f202..44ab54393 100644
--- a/app/javascript/dashboard/components-next/NewConversation/ComposeConversation.vue
+++ b/app/javascript/dashboard/components-next/NewConversation/ComposeConversation.vue
@@ -2,6 +2,7 @@
 import { ref, computed, onMounted, watch } from 'vue';
 import { useStore, useMapGetter } from 'dashboard/composables/store';
 import { useI18n } from 'vue-i18n';
+import { useUISettings } from 'dashboard/composables/useUISettings';
 import { vOnClickOutside } from '@vueuse/components';
 import { useAlert } from 'dashboard/composables';
 import { ExceptionWithMessage } from 'shared/helpers/CustomErrors';
@@ -30,6 +31,8 @@ const props = defineProps({
 const store = useStore();
 const { t } = useI18n();
 
+const { fetchSignatureFlagFromUISettings } = useUISettings();
+
 const contacts = ref([]);
 const selectedContact = ref(null);
 const targetInbox = ref(null);
@@ -43,6 +46,11 @@ const contactsUiFlags = useMapGetter('contacts/getUIFlags');
 const currentUser = useMapGetter('getCurrentUser');
 const globalConfig = useMapGetter('globalConfig/get');
 const uiFlags = useMapGetter('contactConversations/getUIFlags');
+const messageSignature = useMapGetter('getMessageSignature');
+
+const sendWithSignature = computed(() =>
+  fetchSignatureFlagFromUISettings(targetInbox.value?.channelType)
+);
 
 const directUploadsEnabled = computed(
   () => globalConfig.value.directUploadsEnabled
@@ -202,6 +210,8 @@ useKeyboardEvents(keyboardEvents);
       :contact-conversations-ui-flags="uiFlags"
       :contacts-ui-flags="contactsUiFlags"
       :class="composePopoverClass"
+      :message-signature="messageSignature"
+      :send-with-signature="sendWithSignature"
       @search-contacts="onContactSearch"
       @reset-contact-search="resetContacts"
       @update-selected-contact="handleSelectedContact"
diff --git a/app/javascript/dashboard/components-next/NewConversation/components/ActionButtons.vue b/app/javascript/dashboard/components-next/NewConversation/components/ActionButtons.vue
index 89784037d..4df1e87be 100644
--- a/app/javascript/dashboard/components-next/NewConversation/components/ActionButtons.vue
+++ b/app/javascript/dashboard/components-next/NewConversation/components/ActionButtons.vue
@@ -1,6 +1,5 @@
 <script setup>
-import { defineAsyncComponent, ref, computed } from 'vue';
-import { useMapGetter } from 'dashboard/composables/store';
+import { defineAsyncComponent, ref, computed, watch, nextTick } from 'vue';
 import { useI18n } from 'vue-i18n';
 import { useUISettings } from 'dashboard/composables/useUISettings';
 import { useFileUpload } from 'dashboard/composables/useFileUpload';
@@ -8,51 +7,24 @@ import { vOnClickOutside } from '@vueuse/components';
 import { ALLOWED_FILE_TYPES } from 'shared/constants/messages';
 import { useKeyboardEvents } from 'dashboard/composables/useKeyboardEvents';
 import FileUpload from 'vue-upload-component';
+import { extractTextFromMarkdown } from 'dashboard/helper/editorHelper';
 
 import Button from 'dashboard/components-next/button/Button.vue';
 import WhatsAppOptions from './WhatsAppOptions.vue';
 
 const props = defineProps({
-  attachedFiles: {
-    type: Array,
-    default: () => [],
-  },
-  isWhatsappInbox: {
-    type: Boolean,
-    default: false,
-  },
-  isEmailOrWebWidgetInbox: {
-    type: Boolean,
-    default: false,
-  },
-  isTwilioSmsInbox: {
-    type: Boolean,
-    default: false,
-  },
-  messageTemplates: {
-    type: Array,
-    default: () => [],
-  },
-  channelType: {
-    type: String,
-    default: '',
-  },
-  isLoading: {
-    type: Boolean,
-    default: false,
-  },
-  disableSendButton: {
-    type: Boolean,
-    default: false,
-  },
-  hasNoInbox: {
-    type: Boolean,
-    default: false,
-  },
-  isDropdownActive: {
-    type: Boolean,
-    default: false,
-  },
+  attachedFiles: { type: Array, default: () => [] },
+  isWhatsappInbox: { type: Boolean, default: false },
+  isEmailOrWebWidgetInbox: { type: Boolean, default: false },
+  isTwilioSmsInbox: { type: Boolean, default: false },
+  messageTemplates: { type: Array, default: () => [] },
+  channelType: { type: String, default: '' },
+  isLoading: { type: Boolean, default: false },
+  disableSendButton: { type: Boolean, default: false },
+  hasSelectedInbox: { type: Boolean, default: false },
+  hasNoInbox: { type: Boolean, default: false },
+  isDropdownActive: { type: Boolean, default: false },
+  messageSignature: { type: String, default: '' },
 });
 
 const emit = defineEmits([
@@ -74,8 +46,11 @@ const EmojiInput = defineAsyncComponent(
   () => import('shared/components/emoji/EmojiInput.vue')
 );
 
-const messageSignature = useMapGetter('getMessageSignature');
-const signatureToApply = computed(() => messageSignature.value);
+const signatureToApply = computed(() =>
+  props.isEmailOrWebWidgetInbox
+    ? props.messageSignature
+    : extractTextFromMarkdown(props.messageSignature)
+);
 
 const {
   fetchSignatureFlagFromUISettings,
@@ -87,13 +62,9 @@ const sendWithSignature = computed(() => {
   return fetchSignatureFlagFromUISettings(props.channelType);
 });
 
-const isSignatureEnabledForInbox = computed(() => {
-  return props.isEmailOrWebWidgetInbox && sendWithSignature.value;
-});
-
 const setSignature = () => {
   if (signatureToApply.value) {
-    if (isSignatureEnabledForInbox.value) {
+    if (sendWithSignature.value) {
       emit('addSignature', signatureToApply.value);
     } else {
       emit('removeSignature', signatureToApply.value);
@@ -106,6 +77,18 @@ const toggleMessageSignature = () => {
   setSignature();
 };
 
+// Added this watch to dynamically set signature.
+// Only targetInbox has value and is Advance Editor(used by isEmailOrWebWidgetInbox)
+// Set the signature only if the inbox based flag is true
+watch(
+  () => props.hasSelectedInbox,
+  newValue => {
+    nextTick(() => {
+      if (newValue && props.isEmailOrWebWidgetInbox) setSignature();
+    });
+  }
+);
+
 const onClickInsertEmoji = emoji => {
   emit('insertEmoji', emoji);
 };
@@ -213,7 +196,7 @@ useKeyboardEvents(keyboardEvents);
         />
       </FileUpload>
       <Button
-        v-if="isEmailOrWebWidgetInbox"
+        v-if="hasSelectedInbox && !isWhatsappInbox"
         icon="i-lucide-signature"
         color="slate"
         size="sm"
diff --git a/app/javascript/dashboard/components-next/NewConversation/components/ComposeNewConversationForm.vue b/app/javascript/dashboard/components-next/NewConversation/components/ComposeNewConversationForm.vue
index b1596ac04..0e6a79f51 100644
--- a/app/javascript/dashboard/components-next/NewConversation/components/ComposeNewConversationForm.vue
+++ b/app/javascript/dashboard/components-next/NewConversation/components/ComposeNewConversationForm.vue
@@ -6,6 +6,7 @@ import { INBOX_TYPES } from 'dashboard/helper/inbox';
 import {
   appendSignature,
   removeSignature,
+  extractTextFromMarkdown,
 } from 'dashboard/helper/editorHelper';
 import {
   buildContactableInboxesList,
@@ -33,6 +34,8 @@ const props = defineProps({
   isDirectUploadsEnabled: { type: Boolean, default: false },
   contactConversationsUiFlags: { type: Object, default: null },
   contactsUiFlags: { type: Object, default: null },
+  messageSignature: { type: String, default: '' },
+  sendWithSignature: { type: Boolean, default: false },
 });
 
 const emit = defineEmits([
@@ -184,6 +187,14 @@ const handleInboxAction = ({ value, action, ...rest }) => {
 
 const removeTargetInbox = value => {
   v$.value.$reset();
+  // Remove the signature from message content
+  // Based on the Advance Editor (used in isEmailOrWebWidget) and Plain editor(all other inboxes except WhatsApp)
+  if (props.sendWithSignature) {
+    const signatureToRemove = inboxTypes.value.isEmailOrWebWidget
+      ? props.messageSignature
+      : extractTextFromMarkdown(props.messageSignature);
+    state.message = removeSignature(state.message, signatureToRemove);
+  }
   emit('updateTargetInbox', value);
   state.attachedFiles = [];
 };
@@ -302,6 +313,8 @@ const handleSendWhatsappMessage = async ({ message, templateParams }) => {
     <MessageEditor
       v-if="!inboxTypes.isWhatsapp && !showNoInboxAlert"
       v-model="state.message"
+      :message-signature="messageSignature"
+      :send-with-signature="sendWithSignature"
       :is-email-or-web-widget-inbox="inboxTypes.isEmailOrWebWidget"
       :has-errors="validationStates.isMessageInvalid"
       :has-attachments="state.attachedFiles.length > 0"
@@ -322,8 +335,10 @@ const handleSendWhatsappMessage = async ({ message, templateParams }) => {
       :channel-type="inboxChannelType"
       :is-loading="isCreating"
       :disable-send-button="isCreating"
+      :has-selected-inbox="!!targetInbox"
       :has-no-inbox="showNoInboxAlert"
       :is-dropdown-active="isAnyDropdownActive"
+      :message-signature="messageSignature"
       @insert-emoji="onClickInsertEmoji"
       @add-signature="handleAddSignature"
       @remove-signature="handleRemoveSignature"
diff --git a/app/javascript/dashboard/components-next/NewConversation/components/MessageEditor.vue b/app/javascript/dashboard/components-next/NewConversation/components/MessageEditor.vue
index ca54f7eca..01b2e4a8d 100644
--- a/app/javascript/dashboard/components-next/NewConversation/components/MessageEditor.vue
+++ b/app/javascript/dashboard/components-next/NewConversation/components/MessageEditor.vue
@@ -1,22 +1,22 @@
 <script setup>
+import { ref, watch, computed, nextTick } from 'vue';
 import { useI18n } from 'vue-i18n';
+import {
+  appendSignature,
+  extractTextFromMarkdown,
+  removeSignature,
+} from 'dashboard/helper/editorHelper';
 
 import Editor from 'dashboard/components-next/Editor/Editor.vue';
 import TextArea from 'dashboard/components-next/textarea/TextArea.vue';
+import CannedResponse from 'dashboard/components/widgets/conversation/CannedResponse.vue';
 
-defineProps({
-  isEmailOrWebWidgetInbox: {
-    type: Boolean,
-    required: true,
-  },
-  hasErrors: {
-    type: Boolean,
-    default: false,
-  },
-  hasAttachments: {
-    type: Boolean,
-    default: false,
-  },
+const props = defineProps({
+  isEmailOrWebWidgetInbox: { type: Boolean, required: true },
+  hasErrors: { type: Boolean, default: false },
+  hasAttachments: { type: Boolean, default: false },
+  sendWithSignature: { type: Boolean, default: false },
+  messageSignature: { type: String, default: '' },
 });
 
 const { t } = useI18n();
@@ -25,41 +25,98 @@ const modelValue = defineModel({
   type: String,
   default: '',
 });
+
+const state = ref({
+  hasSlashCommand: false,
+  showMentions: false,
+  mentionSearchKey: '',
+});
+
+const plainTextSignature = computed(() =>
+  extractTextFromMarkdown(props.messageSignature)
+);
+
+watch(
+  modelValue,
+  newValue => {
+    if (props.isEmailOrWebWidgetInbox) return;
+
+    const bodyWithoutSignature = newValue
+      ? removeSignature(newValue, plainTextSignature.value)
+      : '';
+
+    // Check if message starts with slash
+    const startsWithSlash = bodyWithoutSignature.startsWith('/');
+
+    // Update slash command and mentions state
+    state.value = {
+      ...state.value,
+      hasSlashCommand: startsWithSlash,
+      showMentions: startsWithSlash,
+      mentionSearchKey: startsWithSlash ? bodyWithoutSignature.slice(1) : '',
+    };
+  },
+  { immediate: true }
+);
+
+const hideMention = () => {
+  state.value.showMentions = false;
+};
+
+const replaceText = async message => {
+  // Only append signature on replace if sendWithSignature is true
+  const finalMessage = props.sendWithSignature
+    ? appendSignature(message, plainTextSignature.value)
+    : message;
+
+  await nextTick();
+  modelValue.value = finalMessage;
+};
 </script>
 
 <template>
-  <div
-    v-if="isEmailOrWebWidgetInbox"
-    class="flex-1 h-full"
-    :class="!hasAttachments && 'min-h-[200px]'"
-  >
-    <Editor
-      v-model="modelValue"
-      :placeholder="
-        t('COMPOSE_NEW_CONVERSATION.FORM.MESSAGE_EDITOR.PLACEHOLDER')
-      "
-      class="[&>div]:!border-transparent [&>div]:px-4 [&>div]:py-4 [&>div]:!bg-transparent h-full [&_.ProseMirror-woot-style]:!max-h-[200px]"
-      :class="
-        hasErrors
-          ? '[&_.empty-node]:before:!text-n-ruby-9 [&_.empty-node]:dark:before:!text-n-ruby-9'
-          : ''
-      "
-      :show-character-count="false"
-    />
-  </div>
-  <div v-else class="flex-1 h-full" :class="!hasAttachments && 'min-h-[200px]'">
-    <TextArea
-      v-model="modelValue"
-      :placeholder="
-        t('COMPOSE_NEW_CONVERSATION.FORM.MESSAGE_EDITOR.PLACEHOLDER')
-      "
-      class="!px-0 [&>div]:!px-4 [&>div]:!border-transparent [&>div]:!bg-transparent"
-      auto-height
-      :custom-text-area-class="
-        hasErrors
-          ? 'placeholder:!text-n-ruby-9 dark:placeholder:!text-n-ruby-9'
-          : ''
-      "
-    />
+  <div class="flex-1 h-full" :class="[!hasAttachments && 'min-h-[200px]']">
+    <template v-if="isEmailOrWebWidgetInbox">
+      <Editor
+        v-model="modelValue"
+        :placeholder="
+          t('COMPOSE_NEW_CONVERSATION.FORM.MESSAGE_EDITOR.PLACEHOLDER')
+        "
+        class="[&>div]:!border-transparent [&>div]:px-4 [&>div]:py-4 [&>div]:!bg-transparent h-full [&_.ProseMirror-woot-style]:!max-h-[200px]"
+        :class="
+          hasErrors
+            ? '[&_.empty-node]:before:!text-n-ruby-9 [&_.empty-node]:dark:before:!text-n-ruby-9'
+            : ''
+        "
+        enable-variables
+        :show-character-count="false"
+      />
+    </template>
+    <template v-else>
+      <TextArea
+        v-model="modelValue"
+        :placeholder="
+          t('COMPOSE_NEW_CONVERSATION.FORM.MESSAGE_EDITOR.PLACEHOLDER')
+        "
+        class="!px-0 [&>div]:!px-4 [&>div]:!border-transparent [&>div]:!bg-transparent"
+        :custom-text-area-class="
+          hasErrors
+            ? 'placeholder:!text-n-ruby-9 dark:placeholder:!text-n-ruby-9'
+            : ''
+        "
+        auto-height
+        allow-signature
+        :signature="messageSignature"
+        :send-with-signature="sendWithSignature"
+      >
+        <CannedResponse
+          v-if="state.showMentions && state.hasSlashCommand"
+          v-on-clickaway="hideMention"
+          class="normal-editor__canned-box"
+          :search-key="state.mentionSearchKey"
+          @replace="replaceText"
+        />
+      </TextArea>
+    </template>
   </div>
 </template>
diff --git a/app/javascript/dashboard/components-next/textarea/TextArea.vue b/app/javascript/dashboard/components-next/textarea/TextArea.vue
index 16e0fe052..80ab8e3df 100644
--- a/app/javascript/dashboard/components-next/textarea/TextArea.vue
+++ b/app/javascript/dashboard/components-next/textarea/TextArea.vue
@@ -1,72 +1,35 @@
 <script setup>
 import { computed, ref, onMounted, nextTick, watch } from 'vue';
+import {
+  appendSignature,
+  removeSignature,
+  extractTextFromMarkdown,
+} from 'dashboard/helper/editorHelper';
 
 const props = defineProps({
-  modelValue: {
-    type: String,
-    default: '',
-  },
-  label: {
-    type: String,
-    default: '',
-  },
-  placeholder: {
-    type: String,
-    default: '',
-  },
-  maxLength: {
-    type: Number,
-    default: 200,
-  },
-  id: {
-    type: String,
-    default: '',
-  },
-  disabled: {
-    type: Boolean,
-    default: false,
-  },
-  customTextAreaClass: {
-    type: String,
-    default: '',
-  },
-  customTextAreaWrapperClass: {
-    type: String,
-    default: '',
-  },
-  showCharacterCount: {
-    type: Boolean,
-    default: false,
-  },
-  autoHeight: {
-    type: Boolean,
-    default: false,
-  },
-  resize: {
-    type: Boolean,
-    default: false,
-  },
-  minHeight: {
-    type: String,
-    default: '4rem',
-  },
-  maxHeight: {
-    type: String,
-    default: '12rem',
-  },
-  autofocus: {
-    type: Boolean,
-    default: false,
-  },
-  message: {
-    type: String,
-    default: '',
-  },
+  modelValue: { type: String, default: '' },
+  label: { type: String, default: '' },
+  placeholder: { type: String, default: '' },
+  maxLength: { type: Number, default: 200 },
+  id: { type: String, default: '' },
+  disabled: { type: Boolean, default: false },
+  customTextAreaClass: { type: String, default: '' },
+  customTextAreaWrapperClass: { type: String, default: '' },
+  showCharacterCount: { type: Boolean, default: false },
+  autoHeight: { type: Boolean, default: false },
+  resize: { type: Boolean, default: false },
+  minHeight: { type: String, default: '4rem' },
+  maxHeight: { type: String, default: '12rem' },
+  autofocus: { type: Boolean, default: false },
+  message: { type: String, default: '' },
   messageType: {
     type: String,
     default: 'info',
     validator: value => ['info', 'error', 'success'].includes(value),
   },
+  signature: { type: String, default: '' },
+  sendWithSignature: { type: Boolean, default: false }, // add this as a prop, so that we won't have to add useUISettings
+  allowSignature: { type: Boolean, default: false }, // allowSignature is a kill switch, ensuring no signature methods are triggered except when this flag is true
 });
 
 const emit = defineEmits(['update:modelValue']);
@@ -75,6 +38,9 @@ const textareaRef = ref(null);
 const isFocused = ref(false);
 
 const characterCount = computed(() => props.modelValue.length);
+const cleanedSignature = computed(() =>
+  extractTextFromMarkdown(props.signature)
+);
 
 const messageClass = computed(() => {
   switch (props.messageType) {
@@ -97,6 +63,32 @@ const adjustHeight = () => {
   textareaRef.value.style.height = `${textareaRef.value.scrollHeight}px`;
 };
 
+const setCursor = () => {
+  if (!textareaRef.value) return;
+
+  const bodyWithoutSignature = removeSignature(
+    props.modelValue,
+    cleanedSignature.value
+  );
+  const bodyEndsAt = bodyWithoutSignature.trimEnd().length;
+
+  textareaRef.value.focus();
+  textareaRef.value.setSelectionRange(bodyEndsAt, bodyEndsAt);
+};
+
+const toggleSignatureInEditor = signatureEnabled => {
+  if (!props.allowSignature) return;
+  const valueWithSignature = signatureEnabled
+    ? appendSignature(props.modelValue, cleanedSignature.value)
+    : removeSignature(props.modelValue, cleanedSignature.value);
+  emit('update:modelValue', valueWithSignature);
+
+  nextTick(() => {
+    adjustHeight();
+    setCursor();
+  });
+};
+
 const handleInput = event => {
   emit('update:modelValue', event.target.value);
   if (props.autoHeight) {
@@ -126,13 +118,20 @@ watch(
   }
 );
 
+watch(
+  () => props.sendWithSignature,
+  newValue => {
+    if (props.allowSignature) toggleSignatureInEditor(newValue);
+  }
+);
+
 onMounted(() => {
   if (props.autoHeight) {
     nextTick(adjustHeight);
   }
 
   if (props.autofocus) {
-    textareaRef.value.focus();
+    textareaRef.value?.focus();
   }
 });
 </script>
@@ -161,6 +160,7 @@ onMounted(() => {
         },
       ]"
     >
+      <slot /><!-- Slot for adding popover -->
       <textarea
         :id="id"
         ref="textareaRef"