diff --git a/apps/start/src/components/report-chart/histogram/chart.tsx b/apps/start/src/components/report-chart/histogram/chart.tsx
index 529ab1a2..ac63c2c4 100644
--- a/apps/start/src/components/report-chart/histogram/chart.tsx
+++ b/apps/start/src/components/report-chart/histogram/chart.tsx
@@ -61,9 +61,14 @@ export function Chart({ data }: Props) {
       range,
       series: reportSeries,
       breakdowns,
+      options: reportOptions,
     },
     options: { hideXAxis, hideYAxis },
   } = useReportChartContext();
+
+  const histogramOptions =
+    reportOptions?.type === 'histogram' ? reportOptions : undefined;
+  const isStacked = histogramOptions?.stacked ?? false;
   const trpc = useTRPC();
   const references = useQuery(
     trpc.reference.getChartReferences.queryOptions(
@@ -155,68 +160,70 @@ export function Chart({ data }: Props) {
         <div className={cn('h-full w-full', isEditMode && 'card p-4')}>
           <ResponsiveContainer>
             <BarChart data={rechartData}>
-            <CartesianGrid
-              strokeDasharray="3 3"
-              vertical={false}
-              className="stroke-def-200"
-            />
-            <Tooltip
-              content={<ReportChartTooltip.Tooltip />}
-              cursor={<BarHover />}
-            />
-            <YAxis {...yAxisProps} />
-            <XAxis {...xAxisProps} scale={'auto'} type="category" />
-            {previous
-              ? series.map((serie) => {
-                  return (
-                    <Bar
-                      key={`${serie.id}:prev`}
-                      name={`${serie.id}:prev`}
-                      dataKey={`${serie.id}:prev:count`}
-                      fill={getChartColor(serie.index)}
-                      fillOpacity={0.3}
-                      radius={5}
-                    />
-                  );
-                })
-              : null}
-            {series.map((serie) => {
-              return (
-                <Bar
-                  key={serie.id}
-                  name={serie.id}
-                  dataKey={`${serie.id}:count`}
-                  fill={getChartColor(serie.index)}
-                  radius={5}
-                  fillOpacity={1}
-                />
-              );
-            })}
-            {references.data?.map((ref) => (
-              <ReferenceLine
-                key={ref.id}
-                x={ref.date.getTime()}
-                stroke={'oklch(from var(--foreground) l c h / 0.1)'}
-                strokeDasharray={'3 3'}
-                label={{
-                  value: ref.title,
-                  position: 'centerTop',
-                  fill: '#334155',
-                  fontSize: 12,
-                }}
-                fontSize={10}
+              <CartesianGrid
+                strokeDasharray="3 3"
+                vertical={false}
+                className="stroke-def-200"
               />
-            ))}
-          </BarChart>
-        </ResponsiveContainer>
-      </div>
-      {isEditMode && (
-        <ReportTable
-          data={data}
-          visibleSeries={series}
-          setVisibleSeries={setVisibleSeries}
-        />
-      )}
+              <Tooltip
+                content={<ReportChartTooltip.Tooltip />}
+                cursor={<BarHover />}
+              />
+              <YAxis {...yAxisProps} />
+              <XAxis {...xAxisProps} scale={'auto'} type="category" />
+              {previous
+                ? series.map((serie) => {
+                    return (
+                      <Bar
+                        key={`${serie.id}:prev`}
+                        name={`${serie.id}:prev`}
+                        dataKey={`${serie.id}:prev:count`}
+                        fill={getChartColor(serie.index)}
+                        fillOpacity={0.3}
+                        radius={5}
+                        stackId={isStacked ? 'prev' : undefined}
+                      />
+                    );
+                  })
+                : null}
+              {series.map((serie) => {
+                return (
+                  <Bar
+                    key={serie.id}
+                    name={serie.id}
+                    dataKey={`${serie.id}:count`}
+                    fill={getChartColor(serie.index)}
+                    radius={isStacked ? 0 : 4}
+                    fillOpacity={1}
+                    stackId={isStacked ? 'current' : undefined}
+                  />
+                );
+              })}
+              {references.data?.map((ref) => (
+                <ReferenceLine
+                  key={ref.id}
+                  x={ref.date.getTime()}
+                  stroke={'oklch(from var(--foreground) l c h / 0.1)'}
+                  strokeDasharray={'3 3'}
+                  label={{
+                    value: ref.title,
+                    position: 'centerTop',
+                    fill: '#334155',
+                    fontSize: 12,
+                  }}
+                  fontSize={10}
+                />
+              ))}
+            </BarChart>
+          </ResponsiveContainer>
+        </div>
+        {isEditMode && (
+          <ReportTable
+            data={data}
+            visibleSeries={series}
+            setVisibleSeries={setVisibleSeries}
+          />
+        )}
       </ChartClickMenu>
     </ReportChartTooltip.TooltipProvider>
   );
diff --git a/apps/start/src/components/report/reportSlice.ts b/apps/start/src/components/report/reportSlice.ts
index 24351176..8b4ebd99 100644
--- a/apps/start/src/components/report/reportSlice.ts
+++ b/apps/start/src/components/report/reportSlice.ts
@@ -361,6 +361,17 @@ export const reportSlice = createSlice({
         state.options.include = action.payload;
       }
     },
+    changeStacked(state, action: PayloadAction<boolean>) {
+      state.dirty = true;
+      if (!state.options || state.options.type !== 'histogram') {
+        state.options = {
+          type: 'histogram',
+          stacked: action.payload,
+        };
+      } else {
+        state.options.stacked = action.payload;
+      }
+    },
     reorderEvents(
       state,
       action: PayloadAction<{ fromIndex: number; toIndex: number }>,
@@ -406,6 +417,7 @@ export const {
   changeSankeySteps,
   changeSankeyExclude,
   changeSankeyInclude,
+  changeStacked,
   reorderEvents,
 } = reportSlice.actions;
 
diff --git a/apps/start/src/components/report/sidebar/ReportSettings.tsx b/apps/start/src/components/report/sidebar/ReportSettings.tsx
index 6c31095b..7f12ce34 100644
--- a/apps/start/src/components/report/sidebar/ReportSettings.tsx
+++ b/apps/start/src/components/report/sidebar/ReportSettings.tsx
@@ -17,6 +17,7 @@ import {
   changeSankeyInclude,
   changeSankeyMode,
   changeSankeySteps,
+  changeStacked,
   changeUnit,
 } from '../reportSlice';
 
@@ -25,14 +26,17 @@ export function ReportSettings() {
   const previous = useSelector((state) => state.report.previous);
   const unit = useSelector((state) => state.report.unit);
   const options = useSelector((state) => state.report.options);
-  
+
   const retentionOptions = options?.type === 'retention' ? options : undefined;
   const criteria = retentionOptions?.criteria ?? 'on_or_after';
-  
+
   const funnelOptions = options?.type === 'funnel' ? options : undefined;
   const funnelGroup = funnelOptions?.funnelGroup;
   const funnelWindow = funnelOptions?.funnelWindow;
 
+  const histogramOptions = options?.type === 'histogram' ? options : undefined;
+  const stacked = histogramOptions?.stacked ?? false;
+
   const dispatch = useDispatch();
   const { projectId } = useAppParams();
   const eventNames = useEventNames({ projectId });
@@ -61,6 +65,10 @@ export function ReportSettings() {
       fields.push('sankeyInclude');
     }
 
+    if (chartType === 'histogram') {
+      fields.push('stacked');
+    }
+
     return fields;
   }, [chartType]);
 
@@ -259,6 +267,15 @@ export function ReportSettings() {
             />
           </div>
         )}
+        {fields.includes('stacked') && (
+          <Label className="flex items-center justify-between mb-0">
+            <span className="whitespace-nowrap">Stack series</span>
+            <Switch
+              checked={stacked}
+              onCheckedChange={(val) => dispatch(changeStacked(!!val))}
+            />
+          </Label>
+        )}
       </div>
     </div>
   );
diff --git a/packages/validation/src/index.ts b/packages/validation/src/index.ts
index 0d7dc1c6..0b101226 100644
--- a/packages/validation/src/index.ts
+++ b/packages/validation/src/index.ts
@@ -126,14 +126,21 @@ export const zSankeyOptions = z.object({
   include: z.array(z.string()).optional(),
 });
 
+export const zHistogramOptions = z.object({
+  type: z.literal('histogram'),
+  stacked: z.boolean().default(false),
+});
+
 export const zReportOptions = z.discriminatedUnion('type', [
   zFunnelOptions,
   zRetentionOptions,
   zSankeyOptions,
+  zHistogramOptions,
 ]);
 
 export type IReportOptions = z.infer<typeof zReportOptions>;
 export type ISankeyOptions = z.infer<typeof zSankeyOptions>;
+export type IHistogramOptions = z.infer<typeof zHistogramOptions>;
 
 export const zWidgetType = z.enum(['realtime', 'counter']);
 export type IWidgetType = z.infer<typeof zWidgetType>;