diff --git a/x-pack/plugins/observability_solution/investigate_app/kibana.jsonc b/x-pack/plugins/observability_solution/investigate_app/kibana.jsonc
index 9b8284808a657..e105cacf75d05 100644
--- a/x-pack/plugins/observability_solution/investigate_app/kibana.jsonc
+++ b/x-pack/plugins/observability_solution/investigate_app/kibana.jsonc
@@ -23,7 +23,8 @@
       "security",
       "observability",
       "licensing",
-      "ruleRegistry"
+      "ruleRegistry",
+      "usageCollection"
     ],
     "requiredBundles": [
       "esql",
diff --git a/x-pack/plugins/observability_solution/investigate_app/server/lib/collectors/fetcher.test.ts b/x-pack/plugins/observability_solution/investigate_app/server/lib/collectors/fetcher.test.ts
new file mode 100644
index 0000000000000..e13ae951975bf
--- /dev/null
+++ b/x-pack/plugins/observability_solution/investigate_app/server/lib/collectors/fetcher.test.ts
@@ -0,0 +1,71 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License
+ * 2.0; you may not use this file except in compliance with the Elastic License
+ * 2.0.
+ */
+
+import { ElasticsearchClientMock, savedObjectsRepositoryMock } from '@kbn/core/server/mocks';
+import { CollectorFetchContext } from '@kbn/usage-collection-plugin/server';
+import { fetcher } from './fetcher';
+
+let savedObjectClient: ReturnType<typeof savedObjectsRepositoryMock.create>;
+
+let closeMock: jest.Mock;
+let esClient: ElasticsearchClientMock;
+
+describe('Investigation usage collector fetcher', () => {
+  beforeEach(() => {
+    savedObjectClient = savedObjectsRepositoryMock.create();
+    closeMock = jest.fn();
+  });
+
+  it('without any existing investigation', async () => {
+    savedObjectClient.createPointInTimeFinder.mockReturnValue({
+      find: async function* find() {
+        return {
+          [Symbol.asyncIterator]: async () => {},
+          next: () => {},
+        };
+      },
+      close: closeMock,
+    });
+
+    const results = await fetcher({
+      soClient: savedObjectClient,
+      esClient,
+    } as CollectorFetchContext);
+
+    expect(closeMock).toHaveBeenCalled();
+    expect(results.investigation).toMatchInlineSnapshot(`
+      Object {
+        "by_origin": Object {
+          "alert": 0,
+          "blank": 0,
+        },
+        "by_status": Object {
+          "active": 0,
+          "cancelled": 0,
+          "mitigated": 0,
+          "resolved": 0,
+          "triage": 0,
+        },
+        "items": Object {
+          "avg": 0,
+          "max": 0,
+          "min": 0,
+          "p90": 0,
+          "p95": 0,
+        },
+        "notes": Object {
+          "avg": 0,
+          "max": 0,
+          "min": 0,
+          "p90": 0,
+          "p95": 0,
+        },
+        "total": 0,
+      }
+    `);
+  });
+});
diff --git a/x-pack/plugins/observability_solution/investigate_app/server/lib/collectors/fetcher.ts b/x-pack/plugins/observability_solution/investigate_app/server/lib/collectors/fetcher.ts
new file mode 100644
index 0000000000000..9f21e39e999a0
--- /dev/null
+++ b/x-pack/plugins/observability_solution/investigate_app/server/lib/collectors/fetcher.ts
@@ -0,0 +1,84 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License
+ * 2.0; you may not use this file except in compliance with the Elastic License
+ * 2.0.
+ */
+import { CollectorFetchContext } from '@kbn/usage-collection-plugin/server';
+import { StoredInvestigation } from '../../models/investigation';
+import { SO_INVESTIGATION_TYPE } from '../../saved_objects/investigation';
+import { computeMetrics } from './helpers/metrics';
+import { Usage } from './type';
+
+export const fetcher = async (context: CollectorFetchContext) => {
+  const finder = context.soClient.createPointInTimeFinder<StoredInvestigation>({
+    type: SO_INVESTIGATION_TYPE,
+    perPage: 10,
+  });
+
+  let usage: Usage['investigation'] = {
+    total: 0,
+    by_status: {
+      triage: 0,
+      active: 0,
+      mitigated: 0,
+      resolved: 0,
+      cancelled: 0,
+    },
+    by_origin: {
+      alert: 0,
+      blank: 0,
+    },
+    items: {
+      avg: 0,
+      p90: 0,
+      p95: 0,
+      max: 0,
+      min: 0,
+    },
+    notes: {
+      avg: 0,
+      p90: 0,
+      p95: 0,
+      max: 0,
+      min: 0,
+    },
+  };
+
+  const items: number[] = [];
+  const notes: number[] = [];
+
+  for await (const response of finder.find()) {
+    usage = response.saved_objects.reduce((acc, so) => {
+      items.push(so.attributes.items.length);
+      notes.push(so.attributes.notes.length);
+
+      return {
+        ...acc,
+        total: acc.total + 1,
+        by_status: {
+          ...acc.by_status,
+          ...(so.attributes.status === 'triage' && { triage: acc.by_status.triage + 1 }),
+          ...(so.attributes.status === 'active' && { active: acc.by_status.active + 1 }),
+          ...(so.attributes.status === 'mitigated' && { mitigated: acc.by_status.mitigated + 1 }),
+          ...(so.attributes.status === 'resolved' && { resolved: acc.by_status.resolved + 1 }),
+          ...(so.attributes.status === 'cancelled' && { cancelled: acc.by_status.cancelled + 1 }),
+        },
+        by_origin: {
+          ...acc.by_origin,
+          ...(so.attributes.origin.type === 'alert' && { alert: acc.by_origin.alert + 1 }),
+          ...(so.attributes.origin.type === 'blank' && { blank: acc.by_origin.blank + 1 }),
+        },
+      };
+    }, usage);
+  }
+
+  usage.items = computeMetrics(items.sort());
+  usage.notes = computeMetrics(notes.sort());
+
+  await finder.close();
+
+  return {
+    investigation: usage,
+  };
+};
diff --git a/x-pack/plugins/observability_solution/investigate_app/server/lib/collectors/helpers/metrics.test.ts b/x-pack/plugins/observability_solution/investigate_app/server/lib/collectors/helpers/metrics.test.ts
new file mode 100644
index 0000000000000..d4e8964b95751
--- /dev/null
+++ b/x-pack/plugins/observability_solution/investigate_app/server/lib/collectors/helpers/metrics.test.ts
@@ -0,0 +1,42 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License
+ * 2.0; you may not use this file except in compliance with the Elastic License
+ * 2.0.
+ */
+
+import { computeMetrics } from './metrics';
+
+describe('ComputeMetrics', () => {
+  it('computes the metrics correctly', async () => {
+    expect(computeMetrics([])).toMatchInlineSnapshot(`
+      Object {
+        "avg": 0,
+        "max": 0,
+        "min": 0,
+        "p90": 0,
+        "p95": 0,
+      }
+    `);
+    expect(computeMetrics([10, 10, 100])).toMatchInlineSnapshot(`
+      Object {
+        "avg": 40,
+        "max": 100,
+        "min": 10,
+        "p90": 100,
+        "p95": 100,
+      }
+    `);
+
+    const arr = Array.from({ length: 100 }, (_, i) => i);
+    expect(computeMetrics(arr)).toMatchInlineSnapshot(`
+      Object {
+        "avg": 49.5,
+        "max": 99,
+        "min": 0,
+        "p90": 90,
+        "p95": 95,
+      }
+    `);
+  });
+});
diff --git a/x-pack/plugins/observability_solution/investigate_app/server/lib/collectors/helpers/metrics.ts b/x-pack/plugins/observability_solution/investigate_app/server/lib/collectors/helpers/metrics.ts
new file mode 100644
index 0000000000000..a6a4a0b28760d
--- /dev/null
+++ b/x-pack/plugins/observability_solution/investigate_app/server/lib/collectors/helpers/metrics.ts
@@ -0,0 +1,32 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License
+ * 2.0; you may not use this file except in compliance with the Elastic License
+ * 2.0.
+ */
+
+import { sum } from 'lodash';
+
+export function computeMetrics(arr: number[]) {
+  if (arr.length === 0) {
+    return {
+      avg: 0,
+      p90: 0,
+      p95: 0,
+      max: 0,
+      min: 0,
+    };
+  }
+
+  const total = sum(arr);
+  const r90 = (90 / 100) * (arr.length - 1) + 1;
+  const r95 = (95 / 100) * (arr.length - 1) + 1;
+
+  return {
+    avg: total / arr.length,
+    p90: arr[Math.floor(r90)],
+    p95: arr[Math.floor(r95)],
+    max: arr[arr.length - 1],
+    min: arr[0],
+  };
+}
diff --git a/x-pack/plugins/observability_solution/investigate_app/server/lib/collectors/register.ts b/x-pack/plugins/observability_solution/investigate_app/server/lib/collectors/register.ts
new file mode 100644
index 0000000000000..56c88eb322807
--- /dev/null
+++ b/x-pack/plugins/observability_solution/investigate_app/server/lib/collectors/register.ts
@@ -0,0 +1,147 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License
+ * 2.0; you may not use this file except in compliance with the Elastic License
+ * 2.0.
+ */
+
+import { UsageCollectionSetup } from '@kbn/usage-collection-plugin/server';
+import { fetcher } from './fetcher';
+import type { Usage } from './type';
+
+export function registerUsageCollector(usageCollection?: UsageCollectionSetup): void {
+  if (!usageCollection) {
+    return;
+  }
+
+  const usageCollector = usageCollection.makeUsageCollector<Usage>({
+    type: 'investigation',
+    schema: {
+      investigation: {
+        total: {
+          type: 'long',
+          _meta: {
+            description: 'The total number of investigations in the cluster',
+          },
+        },
+        by_status: {
+          triage: {
+            type: 'long',
+            _meta: {
+              description: 'The number of investigations in triage status in the cluster',
+            },
+          },
+          active: {
+            type: 'long',
+            _meta: { description: 'The number of investigations in active status in the cluster' },
+          },
+          mitigated: {
+            type: 'long',
+            _meta: {
+              description: 'The number of investigations in mitigated status in the cluster',
+            },
+          },
+          resolved: {
+            type: 'long',
+            _meta: {
+              description: 'The number of investigations in resolved status in the cluster',
+            },
+          },
+          cancelled: {
+            type: 'long',
+            _meta: {
+              description: 'The number of investigations in cancelled status in the cluster',
+            },
+          },
+        },
+        by_origin: {
+          alert: {
+            type: 'long',
+            _meta: {
+              description: 'The number of investigations created from alerts in the cluster',
+            },
+          },
+          blank: {
+            type: 'long',
+            _meta: {
+              description: 'The number of investigations created from scratch in the cluster',
+            },
+          },
+        },
+        items: {
+          avg: {
+            type: 'long',
+            _meta: {
+              description: 'The average number of items across all investigations in the cluster',
+            },
+          },
+          p90: {
+            type: 'long',
+            _meta: {
+              description:
+                'The 90th percentile of the number of items across all investigations in the cluster',
+            },
+          },
+          p95: {
+            type: 'long',
+            _meta: {
+              description:
+                'The 95th percentile of the number of items across all investigations in the cluster',
+            },
+          },
+          max: {
+            type: 'long',
+            _meta: {
+              description: 'The maximum number of items across all investigations in the cluster',
+            },
+          },
+          min: {
+            type: 'long',
+            _meta: {
+              description: 'The minimum number of items across all investigations in the cluster',
+            },
+          },
+        },
+        notes: {
+          avg: {
+            type: 'long',
+            _meta: {
+              description: 'The average number of notes across all investigations in the cluster',
+            },
+          },
+          p90: {
+            type: 'long',
+            _meta: {
+              description:
+                'The 90th percentile of the number of notes across all investigations in the cluster',
+            },
+          },
+          p95: {
+            type: 'long',
+            _meta: {
+              description:
+                'The 95th percentile of the number of notes across all investigations in the cluster',
+            },
+          },
+          max: {
+            type: 'long',
+            _meta: {
+              description: 'The maximum number of notes across all investigations in the cluster',
+            },
+          },
+          min: {
+            type: 'long',
+            _meta: {
+              description: 'The minimum number of notes across all investigations in the cluster',
+            },
+          },
+        },
+      },
+    },
+    isReady: () => true,
+    fetch: fetcher,
+  });
+
+  // register usage collector
+  usageCollection.registerCollector(usageCollector);
+}
diff --git a/x-pack/plugins/observability_solution/investigate_app/server/lib/collectors/type.ts b/x-pack/plugins/observability_solution/investigate_app/server/lib/collectors/type.ts
new file mode 100644
index 0000000000000..b7d4215195b4d
--- /dev/null
+++ b/x-pack/plugins/observability_solution/investigate_app/server/lib/collectors/type.ts
@@ -0,0 +1,37 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License
+ * 2.0; you may not use this file except in compliance with the Elastic License
+ * 2.0.
+ */
+
+export interface Usage {
+  investigation: {
+    total: number;
+    by_status: {
+      triage: number;
+      active: number;
+      mitigated: number;
+      resolved: number;
+      cancelled: number;
+    };
+    by_origin: {
+      alert: number;
+      blank: number;
+    };
+    items: {
+      avg: number;
+      p90: number;
+      p95: number;
+      max: number;
+      min: number;
+    };
+    notes: {
+      avg: number;
+      p90: number;
+      p95: number;
+      max: number;
+      min: number;
+    };
+  };
+}
diff --git a/x-pack/plugins/observability_solution/investigate_app/server/plugin.ts b/x-pack/plugins/observability_solution/investigate_app/server/plugin.ts
index f1ee1cacd155b..ec710cffa3b8d 100644
--- a/x-pack/plugins/observability_solution/investigate_app/server/plugin.ts
+++ b/x-pack/plugins/observability_solution/investigate_app/server/plugin.ts
@@ -19,6 +19,7 @@ import type {
 } from './types';
 import { investigation } from './saved_objects/investigation';
 import { InvestigateAppConfig } from './config';
+import { registerUsageCollector } from './lib/collectors/register';
 
 export class InvestigateAppPlugin
   implements
@@ -53,6 +54,7 @@ export class InvestigateAppPlugin
 
     if (this.config.enabled === true) {
       coreSetup.savedObjects.registerType(investigation);
+      registerUsageCollector(pluginsSetup.usageCollection);
 
       registerServerRoutes({
         core: coreSetup,
diff --git a/x-pack/plugins/observability_solution/investigate_app/server/types.ts b/x-pack/plugins/observability_solution/investigate_app/server/types.ts
index fa4db6ccfcb05..8803221000d5b 100644
--- a/x-pack/plugins/observability_solution/investigate_app/server/types.ts
+++ b/x-pack/plugins/observability_solution/investigate_app/server/types.ts
@@ -10,6 +10,7 @@ import {
   RuleRegistryPluginSetupContract,
   RuleRegistryPluginStartContract,
 } from '@kbn/rule-registry-plugin/server';
+import { UsageCollectionSetup } from '@kbn/usage-collection-plugin/server';
 
 /* eslint-disable @typescript-eslint/no-empty-interface*/
 
@@ -18,6 +19,7 @@ export interface ConfigSchema {}
 export interface InvestigateAppSetupDependencies {
   observability: ObservabilityPluginSetup;
   ruleRegistry: RuleRegistryPluginSetupContract;
+  usageCollection: UsageCollectionSetup;
 }
 
 export interface InvestigateAppStartDependencies {
diff --git a/x-pack/plugins/observability_solution/investigate_app/tsconfig.json b/x-pack/plugins/observability_solution/investigate_app/tsconfig.json
index a853456b1156c..d3974c0c0ed49 100644
--- a/x-pack/plugins/observability_solution/investigate_app/tsconfig.json
+++ b/x-pack/plugins/observability_solution/investigate_app/tsconfig.json
@@ -69,5 +69,6 @@
     "@kbn/charts-plugin",
     "@kbn/observability-utils",
     "@kbn/observability-alerting-rule-utils",
+    "@kbn/usage-collection-plugin",
   ],
 }
diff --git a/x-pack/plugins/telemetry_collection_xpack/schema/xpack_plugins.json b/x-pack/plugins/telemetry_collection_xpack/schema/xpack_plugins.json
index 79f9a373a92ba..257ad9c3af07b 100644
--- a/x-pack/plugins/telemetry_collection_xpack/schema/xpack_plugins.json
+++ b/x-pack/plugins/telemetry_collection_xpack/schema/xpack_plugins.json
@@ -13643,6 +13643,138 @@
         }
       }
     },
+    "investigation": {
+      "properties": {
+        "investigation": {
+          "properties": {
+            "total": {
+              "type": "long",
+              "_meta": {
+                "description": "The total number of investigations in the cluster"
+              }
+            },
+            "by_status": {
+              "properties": {
+                "triage": {
+                  "type": "long",
+                  "_meta": {
+                    "description": "The number of investigations in triage status in the cluster"
+                  }
+                },
+                "active": {
+                  "type": "long",
+                  "_meta": {
+                    "description": "The number of investigations in active status in the cluster"
+                  }
+                },
+                "mitigated": {
+                  "type": "long",
+                  "_meta": {
+                    "description": "The number of investigations in mitigated status in the cluster"
+                  }
+                },
+                "resolved": {
+                  "type": "long",
+                  "_meta": {
+                    "description": "The number of investigations in resolved status in the cluster"
+                  }
+                },
+                "cancelled": {
+                  "type": "long",
+                  "_meta": {
+                    "description": "The number of investigations in cancelled status in the cluster"
+                  }
+                }
+              }
+            },
+            "by_origin": {
+              "properties": {
+                "alert": {
+                  "type": "long",
+                  "_meta": {
+                    "description": "The number of investigations created from alerts in the cluster"
+                  }
+                },
+                "blank": {
+                  "type": "long",
+                  "_meta": {
+                    "description": "The number of investigations created from scratch in the cluster"
+                  }
+                }
+              }
+            },
+            "items": {
+              "properties": {
+                "avg": {
+                  "type": "long",
+                  "_meta": {
+                    "description": "The average number of items across all investigations in the cluster"
+                  }
+                },
+                "p90": {
+                  "type": "long",
+                  "_meta": {
+                    "description": "The 90th percentile of the number of items across all investigations in the cluster"
+                  }
+                },
+                "p95": {
+                  "type": "long",
+                  "_meta": {
+                    "description": "The 95th percentile of the number of items across all investigations in the cluster"
+                  }
+                },
+                "max": {
+                  "type": "long",
+                  "_meta": {
+                    "description": "The maximum number of items across all investigations in the cluster"
+                  }
+                },
+                "min": {
+                  "type": "long",
+                  "_meta": {
+                    "description": "The minimum number of items across all investigations in the cluster"
+                  }
+                }
+              }
+            },
+            "notes": {
+              "properties": {
+                "avg": {
+                  "type": "long",
+                  "_meta": {
+                    "description": "The average number of notes across all investigations in the cluster"
+                  }
+                },
+                "p90": {
+                  "type": "long",
+                  "_meta": {
+                    "description": "The 90th percentile of the number of notes across all investigations in the cluster"
+                  }
+                },
+                "p95": {
+                  "type": "long",
+                  "_meta": {
+                    "description": "The 95th percentile of the number of notes across all investigations in the cluster"
+                  }
+                },
+                "max": {
+                  "type": "long",
+                  "_meta": {
+                    "description": "The maximum number of notes across all investigations in the cluster"
+                  }
+                },
+                "min": {
+                  "type": "long",
+                  "_meta": {
+                    "description": "The minimum number of notes across all investigations in the cluster"
+                  }
+                }
+              }
+            }
+          }
+        }
+      }
+    },
     "kibana_settings": {
       "properties": {
         "xpack": {