diff --git a/ct/headers/sync-in b/ct/headers/sync-in
new file mode 100644
index 000000000..f5ae41c66
--- /dev/null
+++ b/ct/headers/sync-in
@@ -0,0 +1,6 @@
+   _____                        _     
+  / ___/__  ______  _____      (_)___ 
+  \__ \/ / / / __ \/ ___/_____/ / __ \
+ ___/ / /_/ / / / / /__/_____/ / / / /
+/____/\__, /_/ /_/\___/     /_/_/ /_/ 
+     /____/                           
diff --git a/ct/sync-in.sh b/ct/sync-in.sh
new file mode 100644
index 000000000..4b43c6dd4
--- /dev/null
+++ b/ct/sync-in.sh
@@ -0,0 +1,65 @@
+#!/usr/bin/env bash
+source <(curl -fsSL https://raw.githubusercontent.com/community-scripts/ProxmoxVE/main/misc/build.func)
+# Copyright (c) 2021-2026 community-scripts ORG
+# Author: MickLesk (CanbiZ)
+# License: MIT | https://github.com/community-scripts/ProxmoxVE/raw/main/LICENSE
+# Source: https://github.com/Sync-in/server
+
+APP="Sync-in"
+var_tags="${var_tags:-files;sync;collaboration}"
+var_cpu="${var_cpu:-2}"
+var_ram="${var_ram:-2048}"
+var_disk="${var_disk:-20}"
+var_os="${var_os:-debian}"
+var_version="${var_version:-13}"
+var_arm64="${var_arm64:-yes}"
+var_unprivileged="${var_unprivileged:-1}"
+
+header_info "$APP"
+variables
+color
+catch_errors
+
+function update_script() {
+  header_info
+  check_container_storage
+  check_container_resources
+
+  if [[ ! -d /opt/sync-in/node_modules/@sync-in ]]; then
+    msg_error "No ${APP} Installation Found!"
+    exit
+  fi
+
+  if check_for_gh_release "sync-in" "Sync-in/server"; then
+    msg_info "Stopping Service"
+    systemctl stop sync-in
+    msg_ok "Stopped Service"
+
+    msg_info "Updating Sync-in"
+    $STD npm install --prefix /opt/sync-in "@sync-in/server@${CHECK_UPDATE_RELEASE#v}"
+    msg_ok "Updated Sync-in"
+
+    msg_info "Running Database Migrations"
+    cd /opt/sync-in
+    $STD npx sync-in-server migrate-db
+    msg_ok "Ran Database Migrations"
+
+    VERSION=$(node -pe "require('/opt/sync-in/node_modules/@sync-in/server/package.json').version" 2>/dev/null || echo "")
+    [[ -n "$VERSION" ]] && echo "$VERSION" >~/.sync-in
+
+    msg_info "Starting Service"
+    systemctl start sync-in
+    msg_ok "Started Service"
+    msg_ok "Updated successfully!"
+  fi
+  exit
+}
+
+start
+build_container
+description
+
+msg_ok "Completed Successfully!\n"
+echo -e "${CREATING}${GN}${APP} setup has been successfully initialized!${CL}"
+echo -e "${INFO}${YW}Access it using the following URL:${CL}"
+echo -e "${GATEWAY}${BGN}http://${IP}:8080${CL}"
diff --git a/install/sync-in-install.sh b/install/sync-in-install.sh
new file mode 100644
index 000000000..0550fecca
--- /dev/null
+++ b/install/sync-in-install.sh
@@ -0,0 +1,82 @@
+#!/usr/bin/env bash
+
+# Copyright (c) 2021-2026 community-scripts ORG
+# Author: MickLesk (CanbiZ)
+# License: MIT | https://github.com/community-scripts/ProxmoxVE/raw/main/LICENSE
+# Source: https://github.com/Sync-in/server
+
+source /dev/stdin <<<"$FUNCTIONS_FILE_PATH"
+color
+verb_ip6
+catch_errors
+setting_up_container
+network_check
+update_os
+
+NODE_VERSION="22" setup_nodejs
+setup_mariadb
+MARIADB_DB_NAME="sync_in" MARIADB_DB_USER="sync_in" setup_mariadb_db
+
+msg_info "Installing Sync-in"
+mkdir -p /opt/sync-in/data
+$STD npm install --prefix /opt/sync-in @sync-in/server
+msg_ok "Installed Sync-in"
+
+msg_info "Configuring Sync-in"
+ENCRYPT_KEY=$(openssl rand -hex 32)
+ACCESS_SECRET=$(openssl rand -hex 32)
+REFRESH_SECRET=$(openssl rand -hex 32)
+cat <<EOF >/opt/sync-in/environment.yaml
+server:
+  port: 8080
+mysql:
+  url: 'mysql://${MARIADB_DB_USER}:${MARIADB_DB_PASS}@localhost:3306/${MARIADB_DB_NAME}'
+auth:
+  encryptionKey: '${ENCRYPT_KEY}'
+  token:
+    access:
+      secret: '${ACCESS_SECRET}'
+    refresh:
+      secret: '${REFRESH_SECRET}'
+applications:
+  files:
+    dataPath: '/opt/sync-in/data'
+EOF
+msg_ok "Configured Sync-in"
+
+msg_info "Running Database Migrations"
+cd /opt/sync-in
+$STD npx sync-in-server migrate-db
+msg_ok "Ran Database Migrations"
+
+msg_info "Creating Admin User"
+cd /opt/sync-in
+$STD npx sync-in-server create-user
+msg_ok "Created Admin User"
+
+VERSION=$(node -pe "require('/opt/sync-in/node_modules/@sync-in/server/package.json').version" 2>/dev/null || echo "")
+[[ -n "$VERSION" ]] && echo "$VERSION" >~/.sync-in
+
+msg_info "Creating Service"
+cat <<EOF >/etc/systemd/system/sync-in.service
+[Unit]
+Description=Sync-in Server
+After=network.target mariadb.service
+
+[Service]
+Type=simple
+User=root
+WorkingDirectory=/opt/sync-in
+ExecStart=/opt/sync-in/node_modules/.bin/sync-in-server start
+Restart=on-failure
+RestartSec=5
+
+[Install]
+WantedBy=multi-user.target
+EOF
+systemctl enable -q --now sync-in
+msg_ok "Created Service"
+
+motd_ssh
+customize
+cleanup_lxc