diff --git a/homeassistant/components/eufy/__init__.py b/homeassistant/components/eufy/__init__.py
index ffa30aa6262e..f2198dc70463 100644
--- a/homeassistant/components/eufy/__init__.py
+++ b/homeassistant/components/eufy/__init__.py
@@ -10,6 +10,7 @@ from homeassistant.const import (
     CONF_PASSWORD,
     CONF_TYPE,
     CONF_USERNAME,
+    Platform,
 )
 from homeassistant.core import HomeAssistant
 from homeassistant.helpers import discovery
@@ -42,14 +43,14 @@ CONFIG_SCHEMA = vol.Schema(
     extra=vol.ALLOW_EXTRA,
 )
 
-EUFY_DISPATCH = {
-    "T1011": "light",
-    "T1012": "light",
-    "T1013": "light",
-    "T1201": "switch",
-    "T1202": "switch",
-    "T1203": "switch",
-    "T1211": "switch",
+PLATFORMS = {
+    "T1011": Platform.LIGHT,
+    "T1012": Platform.LIGHT,
+    "T1013": Platform.LIGHT,
+    "T1201": Platform.SWITCH,
+    "T1202": Platform.SWITCH,
+    "T1203": Platform.SWITCH,
+    "T1211": Platform.SWITCH,
 }
 
 
@@ -62,19 +63,19 @@ def setup(hass: HomeAssistant, config: ConfigType) -> bool:
         )
         for device in data:
             kind = device["type"]
-            if kind not in EUFY_DISPATCH:
+            if kind not in PLATFORMS:
                 continue
-            discovery.load_platform(hass, EUFY_DISPATCH[kind], DOMAIN, device, config)
+            discovery.load_platform(hass, PLATFORMS[kind], DOMAIN, device, config)
 
     for device_info in config[DOMAIN][CONF_DEVICES]:
         kind = device_info["type"]
-        if kind not in EUFY_DISPATCH:
+        if kind not in PLATFORMS:
             continue
         device = {}
         device["address"] = device_info["address"]
         device["code"] = device_info["access_token"]
         device["type"] = device_info["type"]
         device["name"] = device_info["name"]
-        discovery.load_platform(hass, EUFY_DISPATCH[kind], DOMAIN, device, config)
+        discovery.load_platform(hass, PLATFORMS[kind], DOMAIN, device, config)
 
     return True
diff --git a/homeassistant/components/geniushub/__init__.py b/homeassistant/components/geniushub/__init__.py
index 72a759427f53..38a0ff15af35 100644
--- a/homeassistant/components/geniushub/__init__.py
+++ b/homeassistant/components/geniushub/__init__.py
@@ -18,6 +18,7 @@ from homeassistant.const import (
     CONF_TOKEN,
     CONF_USERNAME,
     TEMP_CELSIUS,
+    Platform,
 )
 from homeassistant.core import HomeAssistant, ServiceCall, callback
 from homeassistant.helpers import config_validation as cv
@@ -95,6 +96,14 @@ SET_ZONE_OVERRIDE_SCHEMA = vol.Schema(
     }
 )
 
+PLATFORMS = (
+    Platform.CLIMATE,
+    Platform.WATER_HEATER,
+    Platform.SENSOR,
+    Platform.BINARY_SENSOR,
+    Platform.SWITCH,
+)
+
 
 async def async_setup(hass: HomeAssistant, config: ConfigType) -> bool:
     """Create a Genius Hub system."""
@@ -120,7 +129,7 @@ async def async_setup(hass: HomeAssistant, config: ConfigType) -> bool:
 
     async_track_time_interval(hass, broker.async_update, SCAN_INTERVAL)
 
-    for platform in ("climate", "water_heater", "sensor", "binary_sensor", "switch"):
+    for platform in PLATFORMS:
         hass.async_create_task(async_load_platform(hass, platform, DOMAIN, {}, config))
 
     setup_service_functions(hass, broker)
diff --git a/homeassistant/components/incomfort/__init__.py b/homeassistant/components/incomfort/__init__.py
index 0d255d84ccec..8a40c279c2af 100644
--- a/homeassistant/components/incomfort/__init__.py
+++ b/homeassistant/components/incomfort/__init__.py
@@ -7,7 +7,7 @@ from aiohttp import ClientResponseError
 from incomfortclient import Gateway as InComfortGateway
 import voluptuous as vol
 
-from homeassistant.const import CONF_HOST, CONF_PASSWORD, CONF_USERNAME
+from homeassistant.const import CONF_HOST, CONF_PASSWORD, CONF_USERNAME, Platform
 from homeassistant.core import HomeAssistant, callback
 from homeassistant.helpers import config_validation as cv
 from homeassistant.helpers.aiohttp_client import async_get_clientsession
@@ -33,6 +33,13 @@ CONFIG_SCHEMA = vol.Schema(
     extra=vol.ALLOW_EXTRA,
 )
 
+PLATFORMS = (
+    Platform.WATER_HEATER,
+    Platform.BINARY_SENSOR,
+    Platform.SENSOR,
+    Platform.CLIMATE,
+)
+
 
 async def async_setup(hass: HomeAssistant, hass_config: ConfigType) -> bool:
     """Create an Intergas InComfort/Intouch system."""
@@ -54,7 +61,7 @@ async def async_setup(hass: HomeAssistant, hass_config: ConfigType) -> bool:
     for heater in heaters:
         await heater.update()
 
-    for platform in ("water_heater", "binary_sensor", "sensor", "climate"):
+    for platform in PLATFORMS:
         hass.async_create_task(
             async_load_platform(hass, platform, DOMAIN, {}, hass_config)
         )
diff --git a/homeassistant/components/keba/__init__.py b/homeassistant/components/keba/__init__.py
index a754321331aa..b957acd2a310 100644
--- a/homeassistant/components/keba/__init__.py
+++ b/homeassistant/components/keba/__init__.py
@@ -5,7 +5,7 @@ import logging
 from keba_kecontact.connection import KebaKeContact
 import voluptuous as vol
 
-from homeassistant.const import CONF_HOST
+from homeassistant.const import CONF_HOST, Platform
 from homeassistant.core import HomeAssistant, ServiceCall
 from homeassistant.helpers import discovery
 import homeassistant.helpers.config_validation as cv
@@ -14,7 +14,7 @@ from homeassistant.helpers.typing import ConfigType
 _LOGGER = logging.getLogger(__name__)
 
 DOMAIN = "keba"
-SUPPORTED_COMPONENTS = ["binary_sensor", "sensor", "lock", "notify"]
+PLATFORMS = (Platform.BINARY_SENSOR, Platform.SENSOR, Platform.LOCK, Platform.NOTIFY)
 
 CONF_RFID = "rfid"
 CONF_FS = "failsafe"
@@ -93,9 +93,9 @@ async def async_setup(hass: HomeAssistant, config: ConfigType) -> bool:
         hass.services.async_register(DOMAIN, service, execute_service)
 
     # Load components
-    for domain in SUPPORTED_COMPONENTS:
+    for platform in PLATFORMS:
         hass.async_create_task(
-            discovery.async_load_platform(hass, domain, DOMAIN, {}, config)
+            discovery.async_load_platform(hass, platform, DOMAIN, {}, config)
         )
 
     # Start periodic polling of charging station data
diff --git a/homeassistant/components/lightwave/__init__.py b/homeassistant/components/lightwave/__init__.py
index 9a33265b2abd..e774a27999de 100644
--- a/homeassistant/components/lightwave/__init__.py
+++ b/homeassistant/components/lightwave/__init__.py
@@ -2,8 +2,6 @@
 from lightwave.lightwave import LWLink
 import voluptuous as vol
 
-from homeassistant.components.climate import DOMAIN as CLIMATE_DOMAIN
-from homeassistant.components.sensor import DOMAIN as SENSOR_DOMAIN
 from homeassistant.const import (
     CONF_HOST,
     CONF_LIGHTS,
@@ -65,6 +63,8 @@ CONFIG_SCHEMA = vol.Schema(
     extra=vol.ALLOW_EXTRA,
 )
 
+PLATFORMS = (Platform.CLIMATE, Platform.SENSOR)
+
 
 async def async_setup(hass: HomeAssistant, config: ConfigType) -> bool:
     """Try to start embedded Lightwave broker."""
@@ -88,8 +88,7 @@ async def async_setup(hass: HomeAssistant, config: ConfigType) -> bool:
         proxy_port = trv[CONF_PROXY_PORT]
         lwlink.set_trv_proxy(proxy_ip, proxy_port)
 
-        platforms = [CLIMATE_DOMAIN, SENSOR_DOMAIN]
-        for platform in platforms:
+        for platform in PLATFORMS:
             hass.async_create_task(
                 async_load_platform(hass, platform, DOMAIN, trvs, config)
             )
diff --git a/homeassistant/components/modbus/const.py b/homeassistant/components/modbus/const.py
index 2594408bd745..dccd2eb49906 100644
--- a/homeassistant/components/modbus/const.py
+++ b/homeassistant/components/modbus/const.py
@@ -1,19 +1,13 @@
 """Constants used in modbus integration."""
 from enum import Enum
 
-from homeassistant.components.binary_sensor import DOMAIN as BINARY_SENSOR_DOMAIN
-from homeassistant.components.climate.const import DOMAIN as CLIMATE_DOMAIN
-from homeassistant.components.cover import DOMAIN as COVER_DOMAIN
-from homeassistant.components.fan import DOMAIN as FAN_DOMAIN
-from homeassistant.components.light import DOMAIN as LIGHT_DOMAIN
-from homeassistant.components.sensor import DOMAIN as SENSOR_DOMAIN
-from homeassistant.components.switch import DOMAIN as SWITCH_DOMAIN
 from homeassistant.const import (
     CONF_BINARY_SENSORS,
     CONF_COVERS,
     CONF_LIGHTS,
     CONF_SENSORS,
     CONF_SWITCHES,
+    Platform,
 )
 
 # configuration names
@@ -131,11 +125,11 @@ MODBUS_DOMAIN = "modbus"
 ACTIVE_SCAN_INTERVAL = 2  # limit to force an extra update
 
 PLATFORMS = (
-    (BINARY_SENSOR_DOMAIN, CONF_BINARY_SENSORS),
-    (CLIMATE_DOMAIN, CONF_CLIMATES),
-    (COVER_DOMAIN, CONF_COVERS),
-    (LIGHT_DOMAIN, CONF_LIGHTS),
-    (FAN_DOMAIN, CONF_FANS),
-    (SENSOR_DOMAIN, CONF_SENSORS),
-    (SWITCH_DOMAIN, CONF_SWITCHES),
+    (Platform.BINARY_SENSOR, CONF_BINARY_SENSORS),
+    (Platform.CLIMATE, CONF_CLIMATES),
+    (Platform.COVER, CONF_COVERS),
+    (Platform.LIGHT, CONF_LIGHTS),
+    (Platform.FAN, CONF_FANS),
+    (Platform.SENSOR, CONF_SENSORS),
+    (Platform.SWITCH, CONF_SWITCHES),
 )
diff --git a/homeassistant/components/qwikswitch/__init__.py b/homeassistant/components/qwikswitch/__init__.py
index a91440db1ed1..ecf7720b2834 100644
--- a/homeassistant/components/qwikswitch/__init__.py
+++ b/homeassistant/components/qwikswitch/__init__.py
@@ -15,6 +15,7 @@ from homeassistant.const import (
     CONF_URL,
     EVENT_HOMEASSISTANT_START,
     EVENT_HOMEASSISTANT_STOP,
+    Platform,
 )
 from homeassistant.core import HomeAssistant, callback
 from homeassistant.helpers.aiohttp_client import async_get_clientsession
@@ -166,11 +167,11 @@ async def async_setup(hass: HomeAssistant, config: ConfigType) -> bool:
 
     hass.data[DOMAIN] = qsusb
 
-    comps: dict[str, list] = {
-        "switch": [],
-        "light": [],
-        "sensor": [],
-        "binary_sensor": [],
+    comps: dict[Platform, list] = {
+        Platform.SWITCH: [],
+        Platform.LIGHT: [],
+        Platform.SENSOR: [],
+        Platform.BINARY_SENSOR: [],
     }
 
     sensor_ids = []
@@ -179,9 +180,9 @@ async def async_setup(hass: HomeAssistant, config: ConfigType) -> bool:
             _, _type = SENSORS[sens["type"]]
             sensor_ids.append(sens["id"])
             if _type is bool:
-                comps["binary_sensor"].append(sens)
+                comps[Platform.BINARY_SENSOR].append(sens)
                 continue
-            comps["sensor"].append(sens)
+            comps[Platform.SENSOR].append(sens)
             for _key in ("invert", "class"):
                 if _key in sens:
                     _LOGGER.warning(
@@ -199,9 +200,9 @@ async def async_setup(hass: HomeAssistant, config: ConfigType) -> bool:
             if dev.qstype != QSType.relay:
                 _LOGGER.warning("You specified a switch that is not a relay %s", qsid)
                 continue
-            comps["switch"].append(qsid)
+            comps[Platform.SWITCH].append(qsid)
         elif dev.qstype in (QSType.relay, QSType.dimmer):
-            comps["light"].append(qsid)
+            comps[Platform.LIGHT].append(qsid)
         else:
             _LOGGER.warning("Ignored unknown QSUSB device: %s", dev)
             continue
diff --git a/homeassistant/components/slide/__init__.py b/homeassistant/components/slide/__init__.py
index eee487196852..6ab3528a927a 100644
--- a/homeassistant/components/slide/__init__.py
+++ b/homeassistant/components/slide/__init__.py
@@ -22,7 +22,7 @@ from homeassistant.helpers.typing import ConfigType
 
 from .const import (
     API,
-    COMPONENT,
+    COMPONENT_PLATFORM,
     CONF_INVERT_POSITION,
     DEFAULT_OFFSET,
     DEFAULT_RETRY,
@@ -167,7 +167,9 @@ async def async_setup(hass: HomeAssistant, config: ConfigType) -> bool:
 
     await update_slides()
 
-    hass.async_create_task(async_load_platform(hass, COMPONENT, DOMAIN, {}, config))
+    hass.async_create_task(
+        async_load_platform(hass, COMPONENT_PLATFORM, DOMAIN, {}, config)
+    )
 
     async_track_time_interval(hass, update_slides, scaninterval)
 
diff --git a/homeassistant/components/slide/const.py b/homeassistant/components/slide/const.py
index 9748e5e0f8c8..ad59b1f268d3 100644
--- a/homeassistant/components/slide/const.py
+++ b/homeassistant/components/slide/const.py
@@ -1,7 +1,9 @@
 """Define constants for the Slide component."""
 
+from homeassistant.const import Platform
+
 API = "api"
-COMPONENT = "cover"
+COMPONENT_PLATFORM = Platform.COVER
 CONF_INVERT_POSITION = "invert_position"
 DOMAIN = "slide"
 SLIDES = "slides"
diff --git a/homeassistant/components/supla/__init__.py b/homeassistant/components/supla/__init__.py
index 647714bc4616..a1e821695969 100644
--- a/homeassistant/components/supla/__init__.py
+++ b/homeassistant/components/supla/__init__.py
@@ -8,7 +8,7 @@ import async_timeout
 from asyncpysupla import SuplaAPI
 import voluptuous as vol
 
-from homeassistant.const import CONF_ACCESS_TOKEN
+from homeassistant.const import CONF_ACCESS_TOKEN, Platform
 from homeassistant.core import HomeAssistant
 from homeassistant.helpers.aiohttp_client import async_get_clientsession
 import homeassistant.helpers.config_validation as cv
@@ -28,9 +28,9 @@ CONF_SERVERS = "servers"
 SCAN_INTERVAL = timedelta(seconds=10)
 
 SUPLA_FUNCTION_HA_CMP_MAP = {
-    "CONTROLLINGTHEROLLERSHUTTER": "cover",
-    "CONTROLLINGTHEGATE": "cover",
-    "LIGHTSWITCH": "switch",
+    "CONTROLLINGTHEROLLERSHUTTER": Platform.COVER,
+    "CONTROLLINGTHEGATE": Platform.COVER,
+    "LIGHTSWITCH": Platform.SWITCH,
 }
 SUPLA_FUNCTION_NONE = "NONE"
 SUPLA_SERVERS = "supla_servers"
@@ -98,7 +98,7 @@ async def discover_devices(hass, hass_config):
 
     Currently it is only run at startup.
     """
-    component_configs = {}
+    component_configs: dict[Platform, list[dict]] = {}
 
     for server_name, server in hass.data[DOMAIN][SUPLA_SERVERS].items():