diff --git a/README.md b/README.md
index a4b6c44..a254385 100644
--- a/README.md
+++ b/README.md
@@ -94,6 +94,7 @@ The repository is split into three top-level areas. Within each, there is one di
 - **React-Resume**: Resume builder with MinIO and PostgreSQL
 - **Passbolt**: Team password manager
 - **Wiki.js**: Modern documentation platform
+- **Outline**: Team knowledge base and wiki (PostgreSQL, Redis/Valkey, MinIO S3, Authentik SSO)
 - **Zipline**: File sharing and screenshot service
 - **Gotify**: Push notification server with REST API and WebSocket support
 - **Ntfy**: Push notification service
diff --git a/applications/infisical/Infisical-secrets/outline-infisicalsecret.yaml b/applications/infisical/Infisical-secrets/outline-infisicalsecret.yaml
new file mode 100644
index 0000000..539b1fe
--- /dev/null
+++ b/applications/infisical/Infisical-secrets/outline-infisicalsecret.yaml
@@ -0,0 +1,22 @@
+apiVersion: secrets.infisical.com/v1alpha1
+kind: InfisicalSecret
+metadata:
+  name: outline-secrets
+  namespace: infisical
+spec:
+  hostAPI: https://infisical.jsme.be
+  resyncInterval: 30
+  authentication:
+    universalAuth:
+      secretsScope:
+        projectSlug: "kubernetes"
+        envSlug: "prod"
+        secretsPath: "/outline"
+        recursive: true
+      credentialsRef:
+        secretName: infisical-universal-auth
+        secretNamespace: infisical
+  managedSecretReference:
+    secretName: outline-secrets
+    secretNamespace: outline
+    secretType: Opaque
diff --git a/applications/outline/outline/outline-deployment.yaml b/applications/outline/outline/outline-deployment.yaml
new file mode 100644
index 0000000..efeb081
--- /dev/null
+++ b/applications/outline/outline/outline-deployment.yaml
@@ -0,0 +1,118 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  namespace: outline
+  name: outline
+spec:
+  replicas: 1
+  selector:
+    matchLabels:
+      app: outline
+  template:
+    metadata:
+      labels:
+        app: outline
+    spec:
+      restartPolicy: Always
+      terminationGracePeriodSeconds: 60
+      containers:
+        - name: outline
+          image: docker.getoutline.com/outlinewiki/outline:1.8.1
+          resources:
+            requests:
+              memory: "512Mi"
+              cpu: "250m"
+            limits:
+              memory: "2Gi"
+              cpu: "2000m"
+          ports:
+            - containerPort: 3000
+          env:
+            - name: TZ
+              value: "Europe/Brussels"
+            - name: NODE_ENV
+              value: "production"
+            - name: URL
+              value: "https://outline.jsme.be"
+            - name: PORT
+              value: "3000"
+            # TLS is terminated at the gateway and X-Forwarded-Proto is set to
+            # https on the HTTPRoute, so Outline must not force an https redirect.
+            - name: FORCE_HTTPS
+              value: "false"
+
+            # --- Database (PostgreSQL) ---
+            - name: DATABASE_URL
+              valueFrom:
+                secretKeyRef:
+                  name: outline-secrets
+                  key: database_url
+            # In-cluster Postgres has no TLS; disable SSL on the connection.
+            - name: PGSSLMODE
+              value: "disable"
+
+            # --- Cache / queue (Redis-compatible Valkey) ---
+            - name: REDIS_URL
+              value: "redis://outline-redis.outline.svc.cluster.local:6379"
+
+            # --- Secrets ---
+            - name: SECRET_KEY
+              valueFrom:
+                secretKeyRef:
+                  name: outline-secrets
+                  key: secret_key
+            - name: UTILS_SECRET
+              valueFrom:
+                secretKeyRef:
+                  name: outline-secrets
+                  key: utils_secret
+
+            # --- File storage (MinIO / S3) ---
+            - name: FILE_STORAGE
+              value: "s3"
+            - name: AWS_REGION
+              value: "us-east-1"
+            - name: AWS_S3_UPLOAD_BUCKET_URL
+              value: "https://s3.jsme.be"
+            - name: AWS_S3_UPLOAD_BUCKET_NAME
+              value: "outline"
+            - name: AWS_S3_FORCE_PATH_STYLE
+              value: "true"
+            - name: AWS_S3_ACL
+              value: "private"
+            - name: AWS_ACCESS_KEY_ID
+              valueFrom:
+                secretKeyRef:
+                  name: outline-secrets
+                  key: s3_access_key
+            - name: AWS_SECRET_ACCESS_KEY
+              valueFrom:
+                secretKeyRef:
+                  name: outline-secrets
+                  key: s3_secret_key
+
+            # --- Authentication (Authentik OIDC) ---
+            - name: OIDC_DISPLAY_NAME
+              value: "Authentik"
+            - name: OIDC_AUTH_URI
+              value: "https://auth.jsme.be/application/o/authorize/"
+            - name: OIDC_TOKEN_URI
+              value: "https://auth.jsme.be/application/o/token/"
+            - name: OIDC_USERINFO_URI
+              value: "https://auth.jsme.be/application/o/userinfo/"
+            - name: OIDC_LOGOUT_URI
+              value: "https://auth.jsme.be/application/o/outline/end-session/"
+            - name: OIDC_USERNAME_CLAIM
+              value: "preferred_username"
+            - name: OIDC_SCOPES
+              value: "openid profile email"
+            - name: OIDC_CLIENT_ID
+              valueFrom:
+                secretKeyRef:
+                  name: outline-secrets
+                  key: oidc_client_id
+            - name: OIDC_CLIENT_SECRET
+              valueFrom:
+                secretKeyRef:
+                  name: outline-secrets
+                  key: oidc_client_secret
diff --git a/applications/outline/outline/outline-httproute.yaml b/applications/outline/outline/outline-httproute.yaml
new file mode 100644
index 0000000..cbaf0ec
--- /dev/null
+++ b/applications/outline/outline/outline-httproute.yaml
@@ -0,0 +1,51 @@
+apiVersion: gateway.networking.k8s.io/v1
+kind: HTTPRoute
+metadata:
+  name: outline-route
+  namespace: outline
+spec:
+  parentRefs:
+    - group: gateway.networking.k8s.io
+      kind: Gateway
+      name: gateway-internal
+      namespace: envoy-gateway
+      sectionName: outline
+    - group: gateway.networking.k8s.io
+      kind: Gateway
+      name: gateway-public
+      namespace: envoy-gateway
+      sectionName: outline
+  hostnames:
+    - "outline.jsme.be"
+  rules:
+    - matches:
+        - path:
+            type: PathPrefix
+            value: /
+      filters:
+        - type: RequestHeaderModifier
+          requestHeaderModifier:
+            set:
+              - name: X-Forwarded-Host
+                value: "outline.jsme.be"
+              - name: X-Forwarded-Proto
+                value: https
+        - type: ResponseHeaderModifier
+          responseHeaderModifier:
+            set:
+              - name: Strict-Transport-Security
+                value: "max-age=31536000; includeSubDomains"
+              - name: X-Content-Type-Options
+                value: nosniff
+              - name: X-Frame-Options
+                value: SAMEORIGIN
+              - name: Referrer-Policy
+                value: strict-origin-when-cross-origin
+              - name: Permissions-Policy
+                value: "camera=(), microphone=(), geolocation=(), payment=()"
+      backendRefs:
+        - name: outline
+          port: 3000
+          kind: Service
+          group: ""
+          weight: 1
diff --git a/applications/outline/outline/outline-service.yaml b/applications/outline/outline/outline-service.yaml
new file mode 100644
index 0000000..34b3759
--- /dev/null
+++ b/applications/outline/outline/outline-service.yaml
@@ -0,0 +1,13 @@
+apiVersion: v1
+kind: Service
+metadata:
+  namespace: outline
+  name: outline
+spec:
+  selector:
+    app: outline
+  ports:
+    - protocol: TCP
+      port: 3000
+      targetPort: 3000
+  type: ClusterIP
diff --git a/applications/outline/postgres/outline-postgres-persistentvolumeclaim.yaml b/applications/outline/postgres/outline-postgres-persistentvolumeclaim.yaml
new file mode 100644
index 0000000..8b9afc2
--- /dev/null
+++ b/applications/outline/postgres/outline-postgres-persistentvolumeclaim.yaml
@@ -0,0 +1,12 @@
+apiVersion: v1
+kind: PersistentVolumeClaim
+metadata:
+  namespace: outline
+  name: outline-postgres-pvc
+spec:
+  accessModes:
+    - ReadWriteOnce
+  storageClassName: longhorn-static
+  resources:
+    requests:
+      storage: 5Gi
diff --git a/applications/outline/postgres/outline-postgres-service.yaml b/applications/outline/postgres/outline-postgres-service.yaml
new file mode 100644
index 0000000..5fec60f
--- /dev/null
+++ b/applications/outline/postgres/outline-postgres-service.yaml
@@ -0,0 +1,14 @@
+apiVersion: v1
+kind: Service
+metadata:
+  name: outline-postgres
+  namespace: outline
+spec:
+  selector:
+    app: outline-postgres
+  type: ClusterIP
+  ports:
+    - name: outline-postgres-port
+      protocol: TCP
+      port: 5432
+      targetPort: 5432
diff --git a/applications/outline/postgres/outline-postgres-statefulset.yaml b/applications/outline/postgres/outline-postgres-statefulset.yaml
new file mode 100644
index 0000000..4d27096
--- /dev/null
+++ b/applications/outline/postgres/outline-postgres-statefulset.yaml
@@ -0,0 +1,55 @@
+apiVersion: apps/v1
+kind: StatefulSet
+metadata:
+  namespace: outline
+  name: outline-postgres
+spec:
+  replicas: 1
+  serviceName: outline-postgres
+  selector:
+    matchLabels:
+      app: outline-postgres
+  template:
+    metadata:
+      labels:
+        app: outline-postgres
+    spec:
+      restartPolicy: Always
+      terminationGracePeriodSeconds: 60
+      containers:
+        - name: outline-postgres
+          image: postgres:18
+          resources:
+            requests:
+              memory: "256Mi"
+              cpu: "100m"
+            limits:
+              memory: "1Gi"
+              cpu: "500m"
+          ports:
+            - containerPort: 5432
+          volumeMounts:
+            - name: outline-postgres-data
+              mountPath: /var/lib/postgresql/data
+          env:
+            - name: PGDATA
+              value: "/var/lib/postgresql/data/pgdata"
+            - name: POSTGRES_USER
+              valueFrom:
+                secretKeyRef:
+                  name: outline-secrets
+                  key: db_user
+            - name: POSTGRES_PASSWORD
+              valueFrom:
+                secretKeyRef:
+                  name: outline-secrets
+                  key: db_password
+            - name: POSTGRES_DB
+              valueFrom:
+                secretKeyRef:
+                  name: outline-secrets
+                  key: db_name
+      volumes:
+        - name: outline-postgres-data
+          persistentVolumeClaim:
+            claimName: outline-postgres-pvc
diff --git a/applications/outline/redis/outline-redis-deployment.yaml b/applications/outline/redis/outline-redis-deployment.yaml
new file mode 100644
index 0000000..63db0d2
--- /dev/null
+++ b/applications/outline/redis/outline-redis-deployment.yaml
@@ -0,0 +1,28 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  namespace: outline
+  name: outline-redis
+spec:
+  replicas: 1
+  selector:
+    matchLabels:
+      app: outline-redis
+  template:
+    metadata:
+      labels:
+        app: outline-redis
+    spec:
+      restartPolicy: Always
+      containers:
+        - name: outline-redis
+          image: valkey/valkey:9
+          resources:
+            requests:
+              memory: "64Mi"
+              cpu: "50m"
+            limits:
+              memory: "256Mi"
+              cpu: "200m"
+          ports:
+            - containerPort: 6379
diff --git a/applications/outline/redis/outline-redis-service.yaml b/applications/outline/redis/outline-redis-service.yaml
new file mode 100644
index 0000000..0267b61
--- /dev/null
+++ b/applications/outline/redis/outline-redis-service.yaml
@@ -0,0 +1,14 @@
+apiVersion: v1
+kind: Service
+metadata:
+  name: outline-redis
+  namespace: outline
+spec:
+  selector:
+    app: outline-redis
+  type: ClusterIP
+  ports:
+    - name: outline-redis-port
+      protocol: TCP
+      port: 6379
+      targetPort: 6379
diff --git a/infra/argocd/applications/outline-application.yaml b/infra/argocd/applications/outline-application.yaml
new file mode 100644
index 0000000..1afc2ea
--- /dev/null
+++ b/infra/argocd/applications/outline-application.yaml
@@ -0,0 +1,24 @@
+apiVersion: argoproj.io/v1alpha1
+kind: Application
+metadata:
+  name: outline
+  namespace: argocd
+spec:
+  project: default
+  source:
+    repoURL: https://gitea.jsme.be/Jeffrey/Kubernetes-Manifests.git
+    path: applications/outline
+    targetRevision: HEAD
+    directory:
+      recurse: true
+  destination:
+    server: https://kubernetes.default.svc
+    namespace: outline
+  syncPolicy:
+    automated:
+      prune: true
+      selfHeal: true
+    syncOptions:
+      - CreateNamespace=true
+      - ServerSideApply=true
+      - PrunePropagationPolicy=foreground
diff --git a/infra/envoy-gateway/kustomization.yaml b/infra/envoy-gateway/kustomization.yaml
index bd2d013..2146962 100644
--- a/infra/envoy-gateway/kustomization.yaml
+++ b/infra/envoy-gateway/kustomization.yaml
@@ -48,6 +48,7 @@ resources:
   - affine/affine-certificate.yaml
   - pelican/pelican-certificate.yaml
   - pelican/pelican-wings-certificate.yaml
+  - outline/outline-certificate.yaml
 
 patches:
   # Internal gateway patches
@@ -273,6 +274,12 @@ patches:
       kind: Gateway
       name: gateway-internal
     path: pelican/pelican-wings-gateway-patch.yaml
+  - target:
+      group: gateway.networking.k8s.io
+      version: v1
+      kind: Gateway
+      name: gateway-internal
+    path: outline/outline-gateway-patch.yaml
 
   # Public gateway patches
   - target:
@@ -347,6 +354,12 @@ patches:
       kind: Gateway
       name: gateway-public
     path: gotify/gotify-gateway-public-patch.yaml
+  - target:
+      group: gateway.networking.k8s.io
+      version: v1
+      kind: Gateway
+      name: gateway-public
+    path: outline/outline-gateway-public-patch.yaml
   # Uncomment to expose Grafana publicly — ensure Grafana auth is properly configured first
   # - target:
   #     group: gateway.networking.k8s.io
diff --git a/infra/envoy-gateway/outline/outline-certificate.yaml b/infra/envoy-gateway/outline/outline-certificate.yaml
new file mode 100644
index 0000000..bdff7a7
--- /dev/null
+++ b/infra/envoy-gateway/outline/outline-certificate.yaml
@@ -0,0 +1,14 @@
+apiVersion: cert-manager.io/v1
+kind: Certificate
+metadata:
+  name: outline-tls
+  namespace: envoy-gateway
+spec:
+  secretName: outline-tls
+  privateKey:
+    rotationPolicy: Always
+  issuerRef:
+    name: azure-dns
+    kind: ClusterIssuer
+  dnsNames:
+    - outline.jsme.be
diff --git a/infra/envoy-gateway/outline/outline-gateway-patch.yaml b/infra/envoy-gateway/outline/outline-gateway-patch.yaml
new file mode 100644
index 0000000..20d5bf4
--- /dev/null
+++ b/infra/envoy-gateway/outline/outline-gateway-patch.yaml
@@ -0,0 +1,19 @@
+- op: add
+  path: /spec/listeners/-
+  value:
+    name: outline
+    protocol: HTTPS
+    port: 443
+    hostname: "outline.jsme.be"
+    allowedRoutes:
+      namespaces:
+        from: Selector
+        selector:
+          matchLabels:
+            kubernetes.io/metadata.name: outline
+    tls:
+      mode: Terminate
+      certificateRefs:
+        - kind: Secret
+          name: outline-tls
+          namespace: envoy-gateway
diff --git a/infra/envoy-gateway/outline/outline-gateway-public-patch.yaml b/infra/envoy-gateway/outline/outline-gateway-public-patch.yaml
new file mode 100644
index 0000000..20d5bf4
--- /dev/null
+++ b/infra/envoy-gateway/outline/outline-gateway-public-patch.yaml
@@ -0,0 +1,19 @@
+- op: add
+  path: /spec/listeners/-
+  value:
+    name: outline
+    protocol: HTTPS
+    port: 443
+    hostname: "outline.jsme.be"
+    allowedRoutes:
+      namespaces:
+        from: Selector
+        selector:
+          matchLabels:
+            kubernetes.io/metadata.name: outline
+    tls:
+      mode: Terminate
+      certificateRefs:
+        - kind: Secret
+          name: outline-tls
+          namespace: envoy-gateway