diff --git a/script/hassfest/codeowners.py b/script/hassfest/codeowners.py
index 958f54a77ff..ae5af2f3a99 100644
--- a/script/hassfest/codeowners.py
+++ b/script/hassfest/codeowners.py
@@ -2,7 +2,7 @@
 
 from __future__ import annotations
 
-from .model import Config, Integration
+from .model import Config, Integration, IntegrationType
 
 BASE = """
 # This file is generated by script/hassfest/codeowners.py
@@ -65,7 +65,7 @@ def generate_and_validate(integrations: dict[str, Integration], config: Config)
     for domain in sorted(integrations):
         integration = integrations[domain]
 
-        if integration.integration_type == "virtual":
+        if integration.integration_type == IntegrationType.VIRTUAL:
             continue
 
         codeowners = integration.manifest["codeowners"]
diff --git a/script/hassfest/config_flow.py b/script/hassfest/config_flow.py
index 1f8b7d1139b..54ca4230001 100644
--- a/script/hassfest/config_flow.py
+++ b/script/hassfest/config_flow.py
@@ -6,7 +6,7 @@ import json
 from typing import Any
 
 from .brand import validate as validate_brands
-from .model import Brand, Config, Integration
+from .model import Brand, Config, Integration, IntegrationType
 from .serializer import format_python_namespace
 
 UNIQUE_ID_IGNORE = {"huawei_lte", "mqtt", "adguard"}
@@ -75,7 +75,7 @@ def _generate_and_validate(integrations: dict[str, Integration], config: Config)
 
         _validate_integration(config, integration)
 
-        if integration.integration_type == "helper":
+        if integration.integration_type == IntegrationType.HELPER:
             domains["helper"].append(domain)
         else:
             domains["integration"].append(domain)
@@ -94,8 +94,8 @@ def _populate_brand_integrations(
     for domain in sub_integrations:
         integration = integrations.get(domain)
         if not integration or integration.integration_type in (
-            "entity",
-            "system",
+            IntegrationType.ENTITY,
+            IntegrationType.SYSTEM,
         ):
             continue
         metadata: dict[str, Any] = {
@@ -170,7 +170,10 @@ def _generate_integrations(
             result["integration"][domain] = metadata
         else:  # integration
             integration = integrations[domain]
-            if integration.integration_type in ("entity", "system"):
+            if integration.integration_type in (
+                IntegrationType.ENTITY,
+                IntegrationType.SYSTEM,
+            ):
                 continue
 
             if integration.translated_name:
@@ -180,7 +183,7 @@ def _generate_integrations(
 
             metadata["integration_type"] = integration.integration_type
 
-            if integration.integration_type == "virtual":
+            if integration.integration_type == IntegrationType.VIRTUAL:
                 if integration.supported_by:
                     metadata["supported_by"] = integration.supported_by
                 if integration.iot_standards:
@@ -195,7 +198,7 @@ def _generate_integrations(
                 ):
                     metadata["single_config_entry"] = single_config_entry
 
-            if integration.integration_type == "helper":
+            if integration.integration_type == IntegrationType.HELPER:
                 result["helper"][domain] = metadata
             else:
                 result["integration"][domain] = metadata
diff --git a/script/hassfest/core_files.py b/script/hassfest/core_files.py
index ac480de11a3..24e9315a02b 100644
--- a/script/hassfest/core_files.py
+++ b/script/hassfest/core_files.py
@@ -4,7 +4,7 @@ import re
 
 from homeassistant.util.yaml import load_yaml_dict
 
-from .model import Config, Integration
+from .model import Config, Integration, IntegrationType
 
 # Non-entity-platform components that belong in base_platforms
 EXTRA_BASE_PLATFORMS = {"diagnostics"}
@@ -29,7 +29,7 @@ def validate(integrations: dict[str, Integration], config: Config) -> None:
     entity_platforms = {
         integration.domain
         for integration in integrations.values()
-        if integration.manifest.get("integration_type") == "entity"
+        if integration.integration_type == IntegrationType.ENTITY
         and integration.domain != "tag"
     }
 
diff --git a/script/hassfest/icons.py b/script/hassfest/icons.py
index 6d2187e3fe6..83efb6d6764 100644
--- a/script/hassfest/icons.py
+++ b/script/hassfest/icons.py
@@ -11,7 +11,7 @@ from voluptuous.humanize import humanize_error
 import homeassistant.helpers.config_validation as cv
 from homeassistant.helpers.icon import convert_shorthand_service_icon
 
-from .model import Config, Integration
+from .model import Config, Integration, IntegrationType
 from .translations import translation_key_validator
 
 
@@ -141,7 +141,7 @@ TRIGGER_ICONS_SCHEMA = cv.schema_with_slug_keys(
 
 
 def icon_schema(
-    core_integration: bool, integration_type: str, no_entity_platform: bool
+    core_integration: bool, integration_type: IntegrationType, no_entity_platform: bool
 ) -> vol.Schema:
     """Create an icon schema."""
 
@@ -189,8 +189,12 @@ def icon_schema(
         }
     )
 
-    if integration_type in ("entity", "helper", "system"):
-        if integration_type != "entity" or no_entity_platform:
+    if integration_type in (
+        IntegrationType.ENTITY,
+        IntegrationType.HELPER,
+        IntegrationType.SYSTEM,
+    ):
+        if integration_type != IntegrationType.ENTITY or no_entity_platform:
             field = vol.Optional("entity_component")
         else:
             field = vol.Required("entity_component")
@@ -207,7 +211,7 @@ def icon_schema(
                 )
             }
         )
-    if integration_type not in ("entity", "system"):
+    if integration_type not in (IntegrationType.ENTITY, IntegrationType.SYSTEM):
         schema = schema.extend(
             {
                 vol.Optional("entity"): vol.All(
diff --git a/script/hassfest/integration_info.py b/script/hassfest/integration_info.py
index 8747e256be7..85a327e147d 100644
--- a/script/hassfest/integration_info.py
+++ b/script/hassfest/integration_info.py
@@ -2,7 +2,7 @@
 
 from __future__ import annotations
 
-from .model import Config, Integration
+from .model import Config, Integration, IntegrationType
 from .serializer import format_python
 
 
@@ -12,12 +12,12 @@ def validate(integrations: dict[str, Integration], config: Config) -> None:
     if config.specific_integrations:
         return
 
-    int_type = "entity"
+    int_type = IntegrationType.ENTITY
 
     domains = [
         integration.domain
         for integration in integrations.values()
-        if integration.manifest.get("integration_type") == int_type
+        if integration.integration_type == int_type
         # Tag is type "entity" but has no entity platform
         and integration.domain != "tag"
     ]
@@ -36,7 +36,7 @@ def validate(integrations: dict[str, Integration], config: Config) -> None:
 
 def generate(integrations: dict[str, Integration], config: Config) -> None:
     """Generate integration file."""
-    int_type = "entity"
+    int_type = IntegrationType.ENTITY
     filename = "entity_platforms"
     platform_path = config.root / f"homeassistant/generated/{filename}.py"
     platform_path.write_text(config.cache[f"integrations_{int_type}"])
diff --git a/script/hassfest/manifest.py b/script/hassfest/manifest.py
index 6e6a5e2d84d..dacc34d3dea 100644
--- a/script/hassfest/manifest.py
+++ b/script/hassfest/manifest.py
@@ -21,7 +21,7 @@ from homeassistant.const import Platform
 from homeassistant.helpers import config_validation as cv
 from script.util import sort_manifest as util_sort_manifest
 
-from .model import Config, Integration, ScaledQualityScaleTiers
+from .model import Config, Integration, IntegrationType, ScaledQualityScaleTiers
 
 DOCUMENTATION_URL_SCHEMA = "https"
 DOCUMENTATION_URL_HOST = "www.home-assistant.io"
@@ -206,15 +206,7 @@ INTEGRATION_MANIFEST_SCHEMA = vol.Schema(
         vol.Required("domain"): str,
         vol.Required("name"): str,
         vol.Optional("integration_type", default="hub"): vol.In(
-            [
-                "device",
-                "entity",
-                "hardware",
-                "helper",
-                "hub",
-                "service",
-                "system",
-            ]
+            [t.value for t in IntegrationType if t != IntegrationType.VIRTUAL]
         ),
         vol.Optional("config_flow"): bool,
         vol.Optional("mqtt"): [str],
@@ -311,7 +303,7 @@ VIRTUAL_INTEGRATION_MANIFEST_SCHEMA = vol.Schema(
     {
         vol.Required("domain"): str,
         vol.Required("name"): str,
-        vol.Required("integration_type"): "virtual",
+        vol.Required("integration_type"): IntegrationType.VIRTUAL.value,
         vol.Exclusive("iot_standards", "virtual_integration"): [
             vol.Any("homekit", "zigbee", "zwave")
         ],
@@ -322,7 +314,7 @@ VIRTUAL_INTEGRATION_MANIFEST_SCHEMA = vol.Schema(
 
 def manifest_schema(value: dict[str, Any]) -> vol.Schema:
     """Validate integration manifest."""
-    if value.get("integration_type") == "virtual":
+    if value.get("integration_type") == IntegrationType.VIRTUAL:
         return VIRTUAL_INTEGRATION_MANIFEST_SCHEMA(value)
     return INTEGRATION_MANIFEST_SCHEMA(value)
 
@@ -373,12 +365,12 @@ def validate_manifest(integration: Integration, core_components_dir: Path) -> No
     if (
         domain not in NO_IOT_CLASS
         and "iot_class" not in integration.manifest
-        and integration.manifest.get("integration_type") != "virtual"
+        and integration.integration_type != IntegrationType.VIRTUAL
     ):
         integration.add_error("manifest", "Domain is missing an IoT Class")
 
     if (
-        integration.manifest.get("integration_type") == "virtual"
+        integration.integration_type == IntegrationType.VIRTUAL
         and (supported_by := integration.manifest.get("supported_by"))
         and not (core_components_dir / supported_by).exists()
     ):
diff --git a/script/hassfest/model.py b/script/hassfest/model.py
index 06e1df4caf3..494d727fccc 100644
--- a/script/hassfest/model.py
+++ b/script/hassfest/model.py
@@ -3,7 +3,7 @@
 from __future__ import annotations
 
 from dataclasses import dataclass, field
-from enum import IntEnum
+from enum import IntEnum, StrEnum
 import json
 import pathlib
 from typing import Any, Literal
@@ -200,9 +200,15 @@ class Integration:
         return self.manifest.get("supported_by", {})
 
     @property
-    def integration_type(self) -> str:
+    def integration_type(self) -> IntegrationType:
         """Get integration_type."""
-        return self.manifest.get("integration_type", "hub")
+        integration_type = self.manifest.get("integration_type", "hub")
+        try:
+            return IntegrationType(integration_type)
+        except ValueError:
+            # The manifest validation will catch this as an error, so we can default to
+            # a valid value here to avoid ValueErrors in other plugins
+            return IntegrationType.HUB
 
     @property
     def iot_class(self) -> str | None:
@@ -248,6 +254,19 @@ class Integration:
         self.manifest_path = manifest_path
 
 
+class IntegrationType(StrEnum):
+    """Supported integration types."""
+
+    DEVICE = "device"
+    ENTITY = "entity"
+    HARDWARE = "hardware"
+    HELPER = "helper"
+    HUB = "hub"
+    SERVICE = "service"
+    SYSTEM = "system"
+    VIRTUAL = "virtual"
+
+
 class ScaledQualityScaleTiers(IntEnum):
     """Supported manifest quality scales."""
 
diff --git a/script/hassfest/quality_scale.py b/script/hassfest/quality_scale.py
index 94b23e32b55..3e5b852d5b4 100644
--- a/script/hassfest/quality_scale.py
+++ b/script/hassfest/quality_scale.py
@@ -11,7 +11,7 @@ from homeassistant.const import Platform
 from homeassistant.exceptions import HomeAssistantError
 from homeassistant.util.yaml import load_yaml_dict
 
-from .model import Config, Integration, ScaledQualityScaleTiers
+from .model import Config, Integration, IntegrationType, ScaledQualityScaleTiers
 from .quality_scale_validation import (
     RuleValidationProtocol,
     action_setup,
@@ -2200,7 +2200,7 @@ def validate_iqs_file(config: Config, integration: Integration) -> None:
         if (
             integration.domain not in INTEGRATIONS_WITHOUT_QUALITY_SCALE_FILE
             and integration.domain not in NO_QUALITY_SCALE
-            and integration.integration_type != "virtual"
+            and integration.integration_type != IntegrationType.VIRTUAL
         ):
             integration.add_error(
                 "quality_scale",
@@ -2218,7 +2218,7 @@ def validate_iqs_file(config: Config, integration: Integration) -> None:
             )
             return
         return
-    if integration.integration_type == "virtual":
+    if integration.integration_type == IntegrationType.VIRTUAL:
         integration.add_error(
             "quality_scale",
             "Virtual integrations are not allowed to have a quality scale file.",
diff --git a/script/hassfest/translations.py b/script/hassfest/translations.py
index 5e55b9a1ca8..cd24b42879d 100644
--- a/script/hassfest/translations.py
+++ b/script/hassfest/translations.py
@@ -14,7 +14,7 @@ from voluptuous.humanize import humanize_error
 import homeassistant.helpers.config_validation as cv
 from script.translations import upload
 
-from .model import Config, Integration
+from .model import Config, Integration, IntegrationType
 
 UNDEFINED = 0
 REQUIRED = 1
@@ -345,7 +345,9 @@ def gen_strings_schema(config: Config, integration: Integration) -> vol.Schema:
                 flow_title=REMOVED,
                 require_step_title=False,
                 mandatory_description=(
-                    "user" if integration.integration_type == "helper" else None
+                    "user"
+                    if integration.integration_type == IntegrationType.HELPER
+                    else None
                 ),
             ),
             vol.Optional("config_subentries"): cv.schema_with_slug_keys(