diff --git a/aiohasupervisor/models/__init__.py b/aiohasupervisor/models/__init__.py
index 8f3c610..1a3614b 100644
--- a/aiohasupervisor/models/__init__.py
+++ b/aiohasupervisor/models/__init__.py
@@ -8,6 +8,7 @@
     AddonsSecurityOptions,
     AddonsStats,
     AddonStage,
+    AddonStartup,
     AddonState,
     AddonsUninstall,
     AppArmor,
@@ -132,6 +133,7 @@
     "RootInfo",
     "AvailableUpdate",
     "AddonStage",
+    "AddonStartup",
     "AddonBoot",
     "AddonBootConfig",
     "CpuArch",
diff --git a/aiohasupervisor/models/addons.py b/aiohasupervisor/models/addons.py
index b7ae168..67293c9 100644
--- a/aiohasupervisor/models/addons.py
+++ b/aiohasupervisor/models/addons.py
@@ -99,6 +99,16 @@ class AddonState(StrEnum):
     ERROR = "error"
 
 
+class AddonStartup(StrEnum):
+    """AddonStartup type."""
+
+    APPLICATION = "application"
+    INITIALIZE = "initialize"
+    ONCE = "once"
+    SERVICES = "services"
+    SYSTEM = "system"
+
+
 # --- OBJECTS ----
 
 
@@ -232,6 +242,7 @@ class InstalledAddonComplete(
     udev: bool
     video: bool
     audio: bool
+    startup: AddonStartup
     services: list[str]
     discovery: list[str]
     translations: dict[str, Any]
diff --git a/tests/test_addons.py b/tests/test_addons.py
index e17e04f..1c89a98 100644
--- a/tests/test_addons.py
+++ b/tests/test_addons.py
@@ -11,6 +11,7 @@
     AddonsOptions,
     AddonsSecurityOptions,
     AddonStage,
+    AddonStartup,
     AddonState,
     AddonsUninstall,
     Capability,
@@ -64,6 +65,7 @@ async def test_addons_info(
     assert addon.supervisor_role == SupervisorRole.MANAGER
     assert addon.system_managed is False
     assert addon.system_managed_config_entry is None
+    assert addon.startup == AddonStartup.SERVICES
 
 
 async def test_addons_uninstall(