diff --git a/.mergify.yml b/.mergify.yml
index a2ea0870..341a451d 100644
--- a/.mergify.yml
+++ b/.mergify.yml
@@ -1,4 +1,12 @@
 pull_request_rules:
+  - name: assign and label scala-steward's PRs
+    conditions:
+      - author=scala-steward
+    actions:
+      assign:
+        users: [eikek]
+      label:
+        add: ["type: dependencies"]
   - name: automatically merge Scala Steward PRs on CI success
     conditions:
       - author=scala-steward
diff --git a/modules/backend/src/main/scala/docspell/backend/ops/OCollective.scala b/modules/backend/src/main/scala/docspell/backend/ops/OCollective.scala
index d7417fd9..5579445e 100644
--- a/modules/backend/src/main/scala/docspell/backend/ops/OCollective.scala
+++ b/modules/backend/src/main/scala/docspell/backend/ops/OCollective.scala
@@ -71,6 +71,9 @@ object OCollective {
   type TagCount = docspell.store.queries.TagCount
   val TagCount = docspell.store.queries.TagCount
 
+  type CategoryCount = docspell.store.queries.CategoryCount
+  val CategoryCount = docspell.store.queries.CategoryCount
+
   type InsightData = QCollective.InsightData
   val insightData = QCollective.InsightData
 
diff --git a/modules/restapi/src/main/resources/docspell-openapi.yml b/modules/restapi/src/main/resources/docspell-openapi.yml
index d579b278..252831ac 100644
--- a/modules/restapi/src/main/resources/docspell-openapi.yml
+++ b/modules/restapi/src/main/resources/docspell-openapi.yml
@@ -4242,6 +4242,7 @@ components:
       required:
         - count
         - tagCloud
+        - tagCategoryCloud
         - fieldStats
         - folderStats
       properties:
@@ -4250,6 +4251,8 @@ components:
           format: int32
         tagCloud:
           $ref: "#/components/schemas/TagCloud"
+        tagCategoryCloud:
+          $ref: "#/components/schemas/NameCloud"
         fieldStats:
           type: array
           items:
@@ -4354,7 +4357,7 @@ components:
             $ref: "#/components/schemas/TagCount"
     TagCount:
       description: |
-        Generic structure for counting something.
+        Structure for counting tags.
       required:
         - tag
         - count
@@ -4364,6 +4367,30 @@ components:
         count:
           type: integer
           format: int32
+
+    NameCloud:
+      description: |
+        A set of counters.
+      required:
+        - items
+      properties:
+        items:
+          type: array
+          items:
+            $ref: "#/components/schemas/NameCount"
+    NameCount:
+      description: |
+        Generic structure for counting something.
+      required:
+        - name
+        - count
+      properties:
+        name:
+          type: string
+        count:
+          type: integer
+          format: int32
+
     AttachmentMeta:
       description: |
         Extracted meta data of an attachment.
diff --git a/modules/restserver/src/main/scala/docspell/restserver/conv/Conversions.scala b/modules/restserver/src/main/scala/docspell/restserver/conv/Conversions.scala
index ed4d5f0e..99b01138 100644
--- a/modules/restserver/src/main/scala/docspell/restserver/conv/Conversions.scala
+++ b/modules/restserver/src/main/scala/docspell/restserver/conv/Conversions.scala
@@ -31,6 +31,7 @@ trait Conversions {
     SearchStats(
       sum.count,
       mkTagCloud(sum.tags),
+      mkTagCategoryCloud(sum.cats),
       sum.fields.map(mkFieldStats),
       sum.folders.map(mkFolderStats)
     )
@@ -63,6 +64,9 @@ trait Conversions {
   def mkTagCloud(tags: List[OCollective.TagCount]) =
     TagCloud(tags.map(tc => TagCount(mkTag(tc.tag), tc.count)))
 
+  def mkTagCategoryCloud(tags: List[OCollective.CategoryCount]) =
+    NameCloud(tags.map(tc => NameCount(tc.category, tc.count)))
+
   // attachment meta
   def mkAttachmentMeta(rm: RAttachmentMeta): AttachmentMeta =
     AttachmentMeta(
diff --git a/modules/store/src/main/scala/docspell/store/qb/DBFunction.scala b/modules/store/src/main/scala/docspell/store/qb/DBFunction.scala
index 40db91b2..705bf959 100644
--- a/modules/store/src/main/scala/docspell/store/qb/DBFunction.scala
+++ b/modules/store/src/main/scala/docspell/store/qb/DBFunction.scala
@@ -9,11 +9,11 @@ object DBFunction {
   val countAll: DBFunction = CountAll
 
   def countAs[A](column: Column[A]): DBFunction =
-    Count(column)
+    Count(column, false)
 
   case object CountAll extends DBFunction
 
-  case class Count(column: Column[_]) extends DBFunction
+  case class Count(column: Column[_], distinct: Boolean) extends DBFunction
 
   case class Max(expr: SelectExpr) extends DBFunction
 
diff --git a/modules/store/src/main/scala/docspell/store/qb/DSL.scala b/modules/store/src/main/scala/docspell/store/qb/DSL.scala
index d2e78be1..c8a883f4 100644
--- a/modules/store/src/main/scala/docspell/store/qb/DSL.scala
+++ b/modules/store/src/main/scala/docspell/store/qb/DSL.scala
@@ -63,7 +63,10 @@ trait DSL extends DoobieMeta {
     FromExpr.From(sel, alias)
 
   def count(c: Column[_]): DBFunction =
-    DBFunction.Count(c)
+    DBFunction.Count(c, false)
+
+  def countDistinct(c: Column[_]): DBFunction =
+    DBFunction.Count(c, true)
 
   def countAll: DBFunction =
     DBFunction.CountAll
diff --git a/modules/store/src/main/scala/docspell/store/qb/impl/DBFunctionBuilder.scala b/modules/store/src/main/scala/docspell/store/qb/impl/DBFunctionBuilder.scala
index c57a9ac3..eba78b27 100644
--- a/modules/store/src/main/scala/docspell/store/qb/impl/DBFunctionBuilder.scala
+++ b/modules/store/src/main/scala/docspell/store/qb/impl/DBFunctionBuilder.scala
@@ -13,8 +13,9 @@ object DBFunctionBuilder extends CommonBuilder {
       case DBFunction.CountAll =>
         sql"COUNT(*)"
 
-      case DBFunction.Count(col) =>
-        sql"COUNT(" ++ column(col) ++ fr")"
+      case DBFunction.Count(col, distinct) =>
+        if (distinct) sql"COUNT(DISTINCT " ++ column(col) ++ fr")"
+        else sql"COUNT(" ++ column(col) ++ fr")"
 
       case DBFunction.Max(expr) =>
         sql"MAX(" ++ SelectExprBuilder.build(expr) ++ fr")"
diff --git a/modules/store/src/main/scala/docspell/store/queries/CategoryCount.scala b/modules/store/src/main/scala/docspell/store/queries/CategoryCount.scala
new file mode 100644
index 00000000..fd502037
--- /dev/null
+++ b/modules/store/src/main/scala/docspell/store/queries/CategoryCount.scala
@@ -0,0 +1,3 @@
+package docspell.store.queries
+
+final case class CategoryCount(category: String, count: Int)
diff --git a/modules/store/src/main/scala/docspell/store/queries/QItem.scala b/modules/store/src/main/scala/docspell/store/queries/QItem.scala
index 637a6890..b9335055 100644
--- a/modules/store/src/main/scala/docspell/store/queries/QItem.scala
+++ b/modules/store/src/main/scala/docspell/store/queries/QItem.scala
@@ -190,9 +190,38 @@ object QItem {
     for {
       count   <- searchCountSummary(today)(q)
       tags    <- searchTagSummary(today)(q)
+      cats    <- searchTagCategorySummary(today)(q)
       fields  <- searchFieldSummary(today)(q)
       folders <- searchFolderSummary(today)(q)
-    } yield SearchSummary(count, tags, fields, folders)
+    } yield SearchSummary(count, tags, cats, fields, folders)
+
+  def searchTagCategorySummary(
+      today: LocalDate
+  )(q: Query): ConnectionIO[List[CategoryCount]] = {
+    val tagFrom =
+      from(ti)
+        .innerJoin(tag, tag.tid === ti.tagId)
+        .innerJoin(i, i.id === ti.itemId)
+
+    val tagCloud =
+      findItemsBase(q.fix, today, 0).unwrap
+        .withSelect(select(tag.category).append(countDistinct(i.id).as("num")))
+        .changeFrom(_.prepend(tagFrom))
+        .changeWhere(c => c && queryCondition(today, q.fix.account.collective, q.cond))
+        .groupBy(tag.category)
+        .build
+        .query[CategoryCount]
+        .to[List]
+
+    // the previous query starts from tags, so items with tag-count=0
+    // are not included they are fetched separately
+    for {
+      existing <- tagCloud
+      allCats  <- RTag.listCategories(q.fix.account.collective)
+      other = allCats.diff(existing.map(_.category))
+    } yield existing ++ other.map(CategoryCount(_, 0))
+
+  }
 
   def searchTagSummary(today: LocalDate)(q: Query): ConnectionIO[List[TagCount]] = {
     val tagFrom =
diff --git a/modules/store/src/main/scala/docspell/store/queries/SearchSummary.scala b/modules/store/src/main/scala/docspell/store/queries/SearchSummary.scala
index 0530c211..7beb1724 100644
--- a/modules/store/src/main/scala/docspell/store/queries/SearchSummary.scala
+++ b/modules/store/src/main/scala/docspell/store/queries/SearchSummary.scala
@@ -3,6 +3,7 @@ package docspell.store.queries
 case class SearchSummary(
     count: Int,
     tags: List[TagCount],
+    cats: List[CategoryCount],
     fields: List[FieldStats],
     folders: List[FolderCount]
 )
diff --git a/modules/store/src/main/scala/docspell/store/queries/TagCount.scala b/modules/store/src/main/scala/docspell/store/queries/TagCount.scala
index e392f889..b7237f2f 100644
--- a/modules/store/src/main/scala/docspell/store/queries/TagCount.scala
+++ b/modules/store/src/main/scala/docspell/store/queries/TagCount.scala
@@ -2,4 +2,4 @@ package docspell.store.queries
 
 import docspell.store.records.RTag
 
-case class TagCount(tag: RTag, count: Int)
+final case class TagCount(tag: RTag, count: Int)
diff --git a/modules/webapp/src/main/elm/Comp/SearchMenu.elm b/modules/webapp/src/main/elm/Comp/SearchMenu.elm
index b0355286..768374f0 100644
--- a/modules/webapp/src/main/elm/Comp/SearchMenu.elm
+++ b/modules/webapp/src/main/elm/Comp/SearchMenu.elm
@@ -92,7 +92,7 @@ type TextSearchModel
 
 init : Flags -> Model
 init flags =
-    { tagSelectModel = Comp.TagSelect.init [] []
+    { tagSelectModel = Comp.TagSelect.init [] [] [] []
     , tagSelection = Comp.TagSelect.emptySelection
     , directionModel =
         Comp.Dropdown.makeSingleList
@@ -483,7 +483,9 @@ updateDrop ddm flags settings msg model =
         GetAllTagsResp (Ok stats) ->
             let
                 tagSel =
-                    Comp.TagSelect.modifyAll stats.tagCloud.items model.tagSelectModel
+                    Comp.TagSelect.modifyAll stats.tagCloud.items
+                        stats.tagCategoryCloud.items
+                        model.tagSelectModel
             in
             { model = { model | tagSelectModel = tagSel }
             , cmd = Cmd.none
@@ -500,9 +502,14 @@ updateDrop ddm flags settings msg model =
 
         GetStatsResp (Ok stats) ->
             let
-                selectModel =
+                tagCount =
                     List.sortBy .count stats.tagCloud.items
-                        |> Comp.TagSelect.modifyCount model.tagSelectModel
+
+                catCount =
+                    List.sortBy .count stats.tagCategoryCloud.items
+
+                selectModel =
+                    Comp.TagSelect.modifyCount model.tagSelectModel tagCount catCount
 
                 model_ =
                     { model
diff --git a/modules/webapp/src/main/elm/Comp/TagSelect.elm b/modules/webapp/src/main/elm/Comp/TagSelect.elm
index 79bd149a..31fa8cda 100644
--- a/modules/webapp/src/main/elm/Comp/TagSelect.elm
+++ b/modules/webapp/src/main/elm/Comp/TagSelect.elm
@@ -1,6 +1,5 @@
 module Comp.TagSelect exposing
-    ( Category
-    , Model
+    ( Model
     , Msg
     , Selection
     , WorkModel
@@ -18,6 +17,7 @@ module Comp.TagSelect exposing
     , viewTagsDrop2
     )
 
+import Api.Model.NameCount exposing (NameCount)
 import Api.Model.Tag exposing (Tag)
 import Api.Model.TagCount exposing (TagCount)
 import Data.Icons as I
@@ -38,9 +38,9 @@ import Util.Maybe
 
 type alias Model =
     { availableTags : Dict String TagCount
-    , availableCats : Dict String Category
+    , availableCats : Dict String NameCount
     , tagCounts : List TagCount
-    , categoryCounts : List Category
+    , categoryCounts : List NameCount
     , filterTerm : Maybe String
     , expandedTags : Bool
     , expandedCats : Bool
@@ -48,23 +48,16 @@ type alias Model =
     }
 
 
-type alias Category =
-    { name : String
-    , count : Int
-    }
-
-
-init : List TagCount -> List TagCount -> Model
-init allTags tags =
+init : List TagCount -> List NameCount -> List TagCount -> List NameCount -> Model
+init allTags allCats tags cats =
     { availableTags =
         List.map (\e -> ( e.tag.id, e )) allTags
             |> Dict.fromList
-    , availableCats = sumCategories allTags
+    , availableCats =
+        List.map (\e -> ( e.name, e )) allCats
+            |> Dict.fromList
     , tagCounts = tags
-    , categoryCounts =
-        sumCategories tags
-            |> Dict.toList
-            |> List.map Tuple.second
+    , categoryCounts = cats
     , filterTerm = Nothing
     , expandedTags = False
     , expandedCats = False
@@ -72,24 +65,23 @@ init allTags tags =
     }
 
 
-modifyAll : List TagCount -> Model -> Model
-modifyAll allTags model =
+modifyAll : List TagCount -> List NameCount -> Model -> Model
+modifyAll allTags allCats model =
     { model
         | availableTags =
             List.map (\e -> ( e.tag.id, e )) allTags
                 |> Dict.fromList
-        , availableCats = sumCategories allTags
+        , availableCats =
+            List.map (\e -> ( e.name, e )) allCats
+                |> Dict.fromList
     }
 
 
-modifyCount : Model -> List TagCount -> Model
-modifyCount model tags =
+modifyCount : Model -> List TagCount -> List NameCount -> Model
+modifyCount model tags cats =
     { model
         | tagCounts = tags
-        , categoryCounts =
-            sumCategories tags
-                |> Dict.toList
-                |> List.map Tuple.second
+        , categoryCounts = cats
     }
 
 
@@ -108,34 +100,11 @@ toggleTag id =
     ToggleTag id
 
 
-sumCategories : List TagCount -> Dict String Category
-sumCategories tags =
-    let
-        filterCat tc =
-            Maybe.map (\cat -> Category cat tc.count) tc.tag.category
-
-        withCats =
-            List.filterMap filterCat tags
-
-        sum cat mc =
-            Maybe.map ((+) cat.count) mc
-                |> Maybe.withDefault cat.count
-                |> Just
-
-        sumCounts cat dict =
-            Dict.update cat.name (sum cat) dict
-
-        cats =
-            List.foldl sumCounts Dict.empty withCats
-    in
-    Dict.map (\name -> \count -> Category name count) cats
-
-
 type alias Selection =
     { includeTags : List TagCount
     , excludeTags : List TagCount
-    , includeCats : List Category
-    , excludeCats : List Category
+    , includeCats : List NameCount
+    , excludeCats : List NameCount
     }
 
 
@@ -145,7 +114,7 @@ emptySelection =
 
 
 type alias WorkModel =
-    { filteredCats : List Category
+    { filteredCats : List NameCount
     , filteredTags : List TagCount
     , selectedTags : Dict String Bool
     , selectedCats : Dict String Bool
@@ -166,7 +135,7 @@ orderTagCountStable model tagCounts =
     List.sortBy order tagCounts
 
 
-orderCatCountStable : Model -> List Category -> List Category
+orderCatCountStable : Model -> List NameCount -> List NameCount
 orderCatCountStable model catCounts =
     let
         order cat =
@@ -193,7 +162,7 @@ removeEmptyTagCounts sel tagCounts =
     List.filter (\tc -> isSelected tc || tc.count > 0) tagCounts
 
 
-removeEmptyCatCounts : Selection -> List Category -> List Category
+removeEmptyCatCounts : Selection -> List NameCount -> List NameCount
 removeEmptyCatCounts sel catCounts =
     let
         selected =
@@ -548,7 +517,7 @@ viewTagItem2 ddm settings model tag =
         ]
 
 
-viewCategoryItem2 : UiSettings -> WorkModel -> Category -> Html Msg
+viewCategoryItem2 : UiSettings -> WorkModel -> NameCount -> Html Msg
 viewCategoryItem2 settings model cat =
     let
         state =