diff --git a/src/app/(main)/websites/[websiteId]/sessions/SessionDeleteButton.tsx b/src/app/(main)/websites/[websiteId]/sessions/SessionDeleteButton.tsx
new file mode 100644
index 000000000..7f1199157
--- /dev/null
+++ b/src/app/(main)/websites/[websiteId]/sessions/SessionDeleteButton.tsx
@@ -0,0 +1,72 @@
+'use client';
+import { useQueryClient } from '@tanstack/react-query';
+import { ConfirmationForm } from '@/components/common/ConfirmationForm';
+import { useDeleteQuery, useMessages } from '@/components/hooks';
+import { Trash } from '@/components/icons';
+import { DialogButton } from '@/components/input/DialogButton';
+
+const invalidationKeys = [
+  ['sessions:stats'],
+  ['websites:stats'],
+  ['websites:events'],
+  ['websites:events:stats'],
+  ['websites:revenue:chart'],
+  ['websites:revenue:metrics'],
+  ['realtime'],
+];
+
+export function SessionDeleteButton({
+  websiteId,
+  sessionId,
+  onSave,
+}: {
+  websiteId: string;
+  sessionId: string;
+  onSave?: () => void;
+}) {
+  const queryClient = useQueryClient();
+  const { t, labels, messages, getErrorMessage } = useMessages();
+  const { mutateAsync, isPending, error, touch } = useDeleteQuery(
+    `/websites/${websiteId}/sessions/${sessionId}`,
+  );
+
+  const handleConfirm = async (close: () => void) => {
+    await mutateAsync(null, {
+      onSuccess: async () => {
+        touch('sessions');
+        touch('replays');
+        touch('revenue-sessions');
+
+        await Promise.all(
+          invalidationKeys.map(queryKey => queryClient.invalidateQueries({ queryKey })),
+        );
+
+        onSave?.();
+        close();
+      },
+    });
+  };
+
+  return (
+    <DialogButton
+      aria-label={t(labels.delete)}
+      data-test="button-delete-session"
+      icon={<Trash />}
+      title={t(labels.confirm)}
+      variant="quiet"
+      width="400px"
+    >
+      {({ close }) => (
+        <ConfirmationForm
+          message={t(messages.confirmDelete, { target: t(labels.session) })}
+          isLoading={isPending}
+          error={getErrorMessage(error)}
+          onConfirm={handleConfirm.bind(null, close)}
+          onClose={close}
+          buttonLabel={t(labels.delete)}
+          buttonVariant="danger"
+        />
+      )}
+    </DialogButton>
+  );
+}
diff --git a/src/app/(main)/websites/[websiteId]/sessions/SessionProfile.test.tsx b/src/app/(main)/websites/[websiteId]/sessions/SessionProfile.test.tsx
new file mode 100644
index 000000000..d07830146
--- /dev/null
+++ b/src/app/(main)/websites/[websiteId]/sessions/SessionProfile.test.tsx
@@ -0,0 +1,94 @@
+import { expect, test, vi } from 'vitest';
+import { render, screen } from '@/test/render';
+import { SessionProfile } from './SessionProfile';
+
+const mockUseConfig = vi.fn();
+const mockUseWebsiteSessionQuery = vi.fn();
+
+vi.mock('@/components/hooks', async () => {
+  const actual = await vi.importActual<typeof import('@/components/hooks')>('@/components/hooks');
+
+  return {
+    ...actual,
+    useConfig: () => mockUseConfig(),
+    useMessages: () => ({
+      t: (value: string) => value,
+      labels: {
+        activity: 'Activity',
+        properties: 'Properties',
+        replays: 'Replays',
+      },
+    }),
+    useMobile: () => ({ isMobile: false }),
+    useWebsiteSessionQuery: () => mockUseWebsiteSessionQuery(),
+  };
+});
+
+vi.mock('@/components/common/Avatar', () => ({
+  Avatar: () => <div>Avatar</div>,
+}));
+
+vi.mock('@/components/common/LoadingPanel', () => ({
+  LoadingPanel: ({ children, data }: { children: React.ReactNode; data: unknown }) =>
+    data ? <div>{children}</div> : null,
+}));
+
+vi.mock('./SessionActivity', () => ({
+  SessionActivity: () => <div>SessionActivity</div>,
+}));
+
+vi.mock('./SessionDeleteButton', () => ({
+  SessionDeleteButton: () => <div data-test="session-delete-button" />,
+}));
+
+vi.mock('./SessionData', () => ({
+  SessionData: () => <div>SessionData</div>,
+}));
+
+vi.mock('./SessionInfo', () => ({
+  SessionInfo: () => <div>SessionInfo</div>,
+}));
+
+vi.mock('./SessionReplaysDataTable', () => ({
+  SessionReplaysDataTable: () => <div>SessionReplaysDataTable</div>,
+}));
+
+vi.mock('./SessionStats', () => ({
+  SessionStats: () => <div>SessionStats</div>,
+}));
+
+function createSessionQueryResult(canDelete: boolean) {
+  return {
+    data: {
+      id: 'session-1',
+      canDelete,
+      firstAt: new Date('2026-07-24T00:00:00.000Z'),
+      lastAt: new Date('2026-07-24T00:05:00.000Z'),
+      distinctId: 'distinct-1',
+    },
+    isLoading: false,
+    error: undefined,
+  };
+}
+
+test('hides the delete button on share routes', () => {
+  mockUseConfig.mockReturnValue({ sessionDeletionEnabled: true });
+  mockUseWebsiteSessionQuery.mockReturnValue(createSessionQueryResult(true));
+
+  render(<SessionProfile websiteId="website-1" sessionId="session-1" onClose={() => null} />, {
+    route: '/share/slug/sessions?session=session-1',
+  });
+
+  expect(screen.queryByTestId('session-delete-button')).not.toBeInTheDocument();
+});
+
+test('shows the delete button on regular website routes when deletion is allowed', () => {
+  mockUseConfig.mockReturnValue({ sessionDeletionEnabled: true });
+  mockUseWebsiteSessionQuery.mockReturnValue(createSessionQueryResult(true));
+
+  render(<SessionProfile websiteId="website-1" sessionId="session-1" onClose={() => null} />, {
+    route: '/websites/website-1/sessions?session=session-1',
+  });
+
+  expect(screen.getByTestId('session-delete-button')).toBeInTheDocument();
+});
diff --git a/src/app/(main)/websites/[websiteId]/sessions/SessionProfile.tsx b/src/app/(main)/websites/[websiteId]/sessions/SessionProfile.tsx
index 1c0405472..a6ccbad72 100644
--- a/src/app/(main)/websites/[websiteId]/sessions/SessionProfile.tsx
+++ b/src/app/(main)/websites/[websiteId]/sessions/SessionProfile.tsx
@@ -10,11 +10,18 @@ import {
   Tabs,
   TextField,
 } from '@umami/react-zen';
-import { X } from 'lucide-react';
+import {
+  useConfig,
+  useMessages,
+  useMobile,
+  useNavigation,
+  useWebsiteSessionQuery,
+} from '@/components/hooks';
+import { X } from '@/components/icons';
 import { Avatar } from '@/components/common/Avatar';
 import { LoadingPanel } from '@/components/common/LoadingPanel';
-import { useMessages, useMobile, useWebsiteSessionQuery } from '@/components/hooks';
 import { SessionActivity } from './SessionActivity';
+import { SessionDeleteButton } from './SessionDeleteButton';
 import { SessionData } from './SessionData';
 import { SessionInfo } from './SessionInfo';
 import { SessionReplaysDataTable } from './SessionReplaysDataTable';
@@ -32,8 +39,14 @@ export function SessionProfile({
   onClose?: () => void;
 }) {
   const { data, isLoading, error } = useWebsiteSessionQuery(websiteId, sessionId);
+  const config = useConfig();
   const { t, labels } = useMessages();
   const { isMobile } = useMobile();
+  const { pathname } = useNavigation();
+  const isSharePage = pathname.includes('/share/');
+  const showDeleteButton = Boolean(
+    !isSharePage && config?.sessionDeletionEnabled && data?.canDelete,
+  );
 
   return (
     <LoadingPanel
@@ -46,7 +59,14 @@ export function SessionProfile({
       {data && (
         <Column gap>
           {onClose && (
-            <Row justifyContent="flex-end">
+            <Row justifyContent="flex-end" gap="1">
+              {showDeleteButton && (
+                <SessionDeleteButton
+                  websiteId={websiteId}
+                  sessionId={sessionId}
+                  onSave={onClose}
+                />
+              )}
               <Button onPress={onClose} variant="quiet">
                 <Icon>
                   <X />
diff --git a/src/app/api/config/route.ts b/src/app/api/config/route.ts
index 42f72693e..b4d2cd1a8 100644
--- a/src/app/api/config/route.ts
+++ b/src/app/api/config/route.ts
@@ -1,3 +1,4 @@
+import { isRelationalOnly } from '@/lib/db';
 import { parseRequest } from '@/lib/request';
 import { json } from '@/lib/response';
 
@@ -16,6 +17,7 @@ export async function GET(request: Request) {
     linksUrl: process.env.LINKS_URL,
     pixelsUrl: process.env.PIXELS_URL,
     privateMode: !!process.env.PRIVATE_MODE,
+    sessionDeletionEnabled: isRelationalOnly(),
     telemetryDisabled: !!process.env.DISABLE_TELEMETRY,
     trackerScriptName: process.env.TRACKER_SCRIPT_NAME,
     updatesDisabled: !!process.env.DISABLE_UPDATES,
diff --git a/src/app/api/websites/[websiteId]/sessions/[sessionId]/route.test.ts b/src/app/api/websites/[websiteId]/sessions/[sessionId]/route.test.ts
index 7a50b1770..2d5f92ed6 100644
--- a/src/app/api/websites/[websiteId]/sessions/[sessionId]/route.test.ts
+++ b/src/app/api/websites/[websiteId]/sessions/[sessionId]/route.test.ts
@@ -1,32 +1,49 @@
 import { beforeEach, expect, test, vi } from 'vitest';
+import { isRelationalOnly } from '@/lib/db';
 import { parseRequest } from '@/lib/request';
-import { canViewWebsiteSection } from '@/permissions';
+import { canDeleteWebsite, canViewWebsiteSection } from '@/permissions';
+import { deleteSession } from '@/queries/prisma';
 import { getLinkedDistinctIds, getLinkedSessionIds, getWebsiteSession } from '@/queries/sql';
-import { GET } from './route';
+import { DELETE, GET } from './route';
+
+vi.mock('@/lib/db', () => ({
+  isRelationalOnly: vi.fn(),
+}));
 
 vi.mock('@/lib/request', () => ({
   parseRequest: vi.fn(),
 }));
 
 vi.mock('@/permissions', () => ({
+  canDeleteWebsite: vi.fn(),
   canViewWebsiteSection: vi.fn(),
 }));
 
+vi.mock('@/queries/prisma', () => ({
+  deleteSession: vi.fn(),
+}));
+
 vi.mock('@/queries/sql', () => ({
   getLinkedDistinctIds: vi.fn(),
   getLinkedSessionIds: vi.fn(),
   getWebsiteSession: vi.fn(),
 }));
 
+const isRelationalOnlyMock = vi.mocked(isRelationalOnly);
 const parseRequestMock = vi.mocked(parseRequest);
+const canDeleteWebsiteMock = vi.mocked(canDeleteWebsite);
 const canViewWebsiteSectionMock = vi.mocked(canViewWebsiteSection);
+const deleteSessionMock = vi.mocked(deleteSession);
 const getLinkedDistinctIdsMock = vi.mocked(getLinkedDistinctIds);
 const getLinkedSessionIdsMock = vi.mocked(getLinkedSessionIds);
 const getWebsiteSessionMock = vi.mocked(getWebsiteSession);
 
 beforeEach(() => {
+  isRelationalOnlyMock.mockReset();
   parseRequestMock.mockReset();
+  canDeleteWebsiteMock.mockReset();
   canViewWebsiteSectionMock.mockReset();
+  deleteSessionMock.mockReset();
   getLinkedDistinctIdsMock.mockReset();
   getLinkedSessionIdsMock.mockReset();
   getWebsiteSessionMock.mockReset();
@@ -35,6 +52,8 @@ beforeEach(() => {
 test('GET returns not found when the session does not exist', async () => {
   parseRequestMock.mockResolvedValue({ auth: {}, error: undefined });
   canViewWebsiteSectionMock.mockResolvedValue(true);
+   isRelationalOnlyMock.mockReturnValue(true);
+   canDeleteWebsiteMock.mockResolvedValue(false);
   getWebsiteSessionMock.mockResolvedValue(undefined);
 
   const response = await GET(
@@ -51,3 +70,105 @@ test('GET returns not found when the session does not exist', async () => {
   expect(getLinkedDistinctIdsMock).not.toHaveBeenCalled();
   expect(getLinkedSessionIdsMock).not.toHaveBeenCalled();
 });
+
+test('GET includes canDelete when relational storage and delete permission are available', async () => {
+  parseRequestMock.mockResolvedValue({ auth: {}, error: undefined });
+  canViewWebsiteSectionMock.mockResolvedValue(true);
+  isRelationalOnlyMock.mockReturnValue(true);
+  canDeleteWebsiteMock.mockResolvedValue(true);
+  getWebsiteSessionMock.mockResolvedValue({
+    id: 'session-1',
+    distinctId: 'distinct-1',
+  });
+  getLinkedSessionIdsMock.mockResolvedValue([
+    { sessionId: 'session-2', createdAt: '2026-07-24T00:00:00.000Z' },
+  ]);
+
+  const response = await GET(
+    new Request('http://localhost/api/websites/website-1/sessions/session-1'),
+    {
+      params: Promise.resolve({ websiteId: 'website-1', sessionId: 'session-1' }),
+    },
+  );
+
+  expect(response.status).toBe(200);
+  await expect(response.json()).resolves.toMatchObject({
+    id: 'session-1',
+    canDelete: true,
+    stitchedSessionCount: 2,
+  });
+});
+
+test('DELETE rejects session deletion for non-relational storage', async () => {
+  parseRequestMock.mockResolvedValue({ auth: {}, error: undefined });
+  isRelationalOnlyMock.mockReturnValue(false);
+
+  const response = await DELETE(
+    new Request('http://localhost/api/websites/website-1/sessions/session-1', { method: 'DELETE' }),
+    {
+      params: Promise.resolve({ websiteId: 'website-1', sessionId: 'session-1' }),
+    },
+  );
+
+  expect(response.status).toBe(400);
+  await expect(response.json()).resolves.toMatchObject({
+    error: { code: 'bad-request' },
+  });
+  expect(canDeleteWebsiteMock).not.toHaveBeenCalled();
+  expect(deleteSessionMock).not.toHaveBeenCalled();
+});
+
+test('DELETE returns unauthorized when the user cannot delete the website', async () => {
+  parseRequestMock.mockResolvedValue({ auth: {}, error: undefined });
+  isRelationalOnlyMock.mockReturnValue(true);
+  canDeleteWebsiteMock.mockResolvedValue(false);
+
+  const response = await DELETE(
+    new Request('http://localhost/api/websites/website-1/sessions/session-1', { method: 'DELETE' }),
+    {
+      params: Promise.resolve({ websiteId: 'website-1', sessionId: 'session-1' }),
+    },
+  );
+
+  expect(response.status).toBe(401);
+  expect(deleteSessionMock).not.toHaveBeenCalled();
+});
+
+test('DELETE returns not found when the session does not exist', async () => {
+  parseRequestMock.mockResolvedValue({ auth: {}, error: undefined });
+  isRelationalOnlyMock.mockReturnValue(true);
+  canDeleteWebsiteMock.mockResolvedValue(true);
+  deleteSessionMock.mockResolvedValue(null);
+
+  const response = await DELETE(
+    new Request('http://localhost/api/websites/website-1/sessions/missing-session', {
+      method: 'DELETE',
+    }),
+    {
+      params: Promise.resolve({ websiteId: 'website-1', sessionId: 'missing-session' }),
+    },
+  );
+
+  expect(response.status).toBe(404);
+  await expect(response.json()).resolves.toMatchObject({
+    error: { code: 'not-found', status: 404 },
+  });
+});
+
+test('DELETE removes the session when the request is valid', async () => {
+  parseRequestMock.mockResolvedValue({ auth: {}, error: undefined });
+  isRelationalOnlyMock.mockReturnValue(true);
+  canDeleteWebsiteMock.mockResolvedValue(true);
+  deleteSessionMock.mockResolvedValue({ id: 'session-1' });
+
+  const response = await DELETE(
+    new Request('http://localhost/api/websites/website-1/sessions/session-1', { method: 'DELETE' }),
+    {
+      params: Promise.resolve({ websiteId: 'website-1', sessionId: 'session-1' }),
+    },
+  );
+
+  expect(response.status).toBe(200);
+  await expect(response.json()).resolves.toEqual({ ok: true });
+  expect(deleteSessionMock).toHaveBeenCalledWith('website-1', 'session-1');
+});
diff --git a/src/app/api/websites/[websiteId]/sessions/[sessionId]/route.ts b/src/app/api/websites/[websiteId]/sessions/[sessionId]/route.ts
index 2c32d52cc..68aa40c72 100644
--- a/src/app/api/websites/[websiteId]/sessions/[sessionId]/route.ts
+++ b/src/app/api/websites/[websiteId]/sessions/[sessionId]/route.ts
@@ -1,6 +1,8 @@
+import { isRelationalOnly } from '@/lib/db';
 import { parseRequest } from '@/lib/request';
-import { json, notFound, unauthorized } from '@/lib/response';
-import { canViewWebsiteSection } from '@/permissions';
+import { badRequest, json, notFound, ok, unauthorized } from '@/lib/response';
+import { canDeleteWebsite, canViewWebsiteSection } from '@/permissions';
+import { deleteSession } from '@/queries/prisma';
 import { getLinkedDistinctIds, getLinkedSessionIds, getWebsiteSession } from '@/queries/sql';
 
 export async function GET(
@@ -14,6 +16,7 @@ export async function GET(
   }
 
   const { websiteId, sessionId } = await params;
+  const canDelete = isRelationalOnly() && (await canDeleteWebsite(auth, websiteId));
 
   if (
     !(await canViewWebsiteSection(auth, websiteId, ['sessions', 'events', 'realtime', 'revenue']))
@@ -49,6 +52,36 @@ export async function GET(
 
   return json({
     ...data,
+    canDelete,
     stitchedSessionCount,
   });
 }
+
+export async function DELETE(
+  request: Request,
+  { params }: { params: Promise<{ websiteId: string; sessionId: string }> },
+) {
+  const { auth, error } = await parseRequest(request);
+
+  if (error) {
+    return error();
+  }
+
+  if (!isRelationalOnly()) {
+    return badRequest({ message: 'Session deletion is only available with relational storage.' });
+  }
+
+  const { websiteId, sessionId } = await params;
+
+  if (!(await canDeleteWebsite(auth, websiteId))) {
+    return unauthorized();
+  }
+
+  const deletedSession = await deleteSession(websiteId, sessionId);
+
+  if (!deletedSession) {
+    return notFound();
+  }
+
+  return ok();
+}
diff --git a/src/components/hooks/useConfig.ts b/src/components/hooks/useConfig.ts
index c1cdcaf67..4f5178165 100644
--- a/src/components/hooks/useConfig.ts
+++ b/src/components/hooks/useConfig.ts
@@ -8,6 +8,7 @@ export type Config = {
   linksUrl?: string;
   pixelsUrl?: string;
   privateMode: boolean;
+  sessionDeletionEnabled: boolean;
   telemetryDisabled: boolean;
   trackerScriptName?: string;
   updatesDisabled: boolean;
diff --git a/src/lib/db.test.ts b/src/lib/db.test.ts
index 06503f6db..09eae675e 100644
--- a/src/lib/db.test.ts
+++ b/src/lib/db.test.ts
@@ -81,6 +81,29 @@ describe('runQuery', () => {
   });
 });
 
+describe('isRelationalOnly', () => {
+  test('returns true for a postgresql database without clickhouse', () => {
+    vi.stubEnv('CLICKHOUSE_URL', '');
+    vi.stubEnv('DATABASE_URL', 'postgresql://user:pass@localhost:5432/umami');
+
+    expect(db.isRelationalOnly()).toBe(true);
+  });
+
+  test('returns false when clickhouse is enabled', () => {
+    vi.stubEnv('CLICKHOUSE_URL', 'http://localhost:8123');
+    vi.stubEnv('DATABASE_URL', 'postgresql://user:pass@localhost:5432/umami');
+
+    expect(db.isRelationalOnly()).toBe(false);
+  });
+
+  test('returns false for unsupported non-relational databases', () => {
+    vi.stubEnv('CLICKHOUSE_URL', '');
+    vi.stubEnv('DATABASE_URL', 'mysql://user:pass@localhost:3306/umami');
+
+    expect(db.isRelationalOnly()).toBe(false);
+  });
+});
+
 describe('BigInt.prototype.toJSON', () => {
   test('serializes bigint values as numbers', () => {
     expect((BigInt(123) as any).toJSON()).toBe(123);
diff --git a/src/lib/db.ts b/src/lib/db.ts
index f363a9df9..474c8aa8e 100644
--- a/src/lib/db.ts
+++ b/src/lib/db.ts
@@ -19,6 +19,10 @@ export function getDatabaseType(url = process.env.DATABASE_URL) {
   return type;
 }
 
+export function isRelationalOnly() {
+  return !process.env.CLICKHOUSE_URL && getDatabaseType() === POSTGRESQL;
+}
+
 export async function runQuery(queries: any) {
   if (process.env.CLICKHOUSE_URL) {
     if (queries[KAFKA]) {
diff --git a/src/queries/prisma/index.ts b/src/queries/prisma/index.ts
index 27288c31c..ad6c50ea6 100644
--- a/src/queries/prisma/index.ts
+++ b/src/queries/prisma/index.ts
@@ -3,6 +3,7 @@ export * from './link';
 export * from './pixel';
 export * from './report';
 export * from './segment';
+export * from './session';
 export * from './sessionReplay';
 export * from './share';
 export * from './team';
diff --git a/src/queries/prisma/session.ts b/src/queries/prisma/session.ts
new file mode 100644
index 000000000..6383c5c0e
--- /dev/null
+++ b/src/queries/prisma/session.ts
@@ -0,0 +1,121 @@
+import prisma from '@/lib/prisma';
+
+export async function deleteSession(
+  websiteId: string,
+  sessionId: string,
+): Promise<{ id: string } | null> {
+  const transaction = prisma.transaction as <T>(input: (tx: any) => Promise<T>) => Promise<T>;
+
+  return transaction(async tx => {
+    const session = await tx.session.findFirst({
+      where: {
+        id: sessionId,
+        websiteId,
+      },
+      select: {
+        id: true,
+      },
+    });
+
+    if (!session) {
+      return null;
+    }
+
+    const websiteEvents = await tx.websiteEvent.findMany({
+      where: {
+        websiteId,
+        sessionId,
+      },
+      select: {
+        id: true,
+        visitId: true,
+      },
+    });
+
+    const sessionReplays = await tx.sessionReplay.findMany({
+      where: {
+        websiteId,
+        sessionId,
+      },
+      select: {
+        visitId: true,
+      },
+    });
+
+    const eventIds = websiteEvents.map(({ id }) => id);
+    const visitIds = Array.from(
+      new Set([...websiteEvents, ...sessionReplays].map(({ visitId }) => visitId)),
+    );
+
+    if (eventIds.length) {
+      await tx.eventData.deleteMany({
+        where: {
+          websiteEventId: {
+            in: eventIds,
+          },
+        },
+      });
+    }
+
+    if (visitIds.length) {
+      await tx.sessionReplaySaved.deleteMany({
+        where: {
+          websiteId,
+          visitId: {
+            in: visitIds,
+          },
+        },
+      });
+    }
+
+    await tx.sessionReplay.deleteMany({
+      where: {
+        websiteId,
+        sessionId,
+      },
+    });
+
+    await tx.heatmapEvent.deleteMany({
+      where: {
+        websiteId,
+        sessionId,
+      },
+    });
+
+    await tx.revenue.deleteMany({
+      where: {
+        websiteId,
+        sessionId,
+      },
+    });
+
+    await tx.sessionData.deleteMany({
+      where: {
+        websiteId,
+        sessionId,
+      },
+    });
+
+    await tx.sessionLink.deleteMany({
+      where: {
+        websiteId,
+        sessionId,
+      },
+    });
+
+    await tx.websiteEvent.deleteMany({
+      where: {
+        websiteId,
+        sessionId,
+      },
+    });
+
+    await tx.session.delete({
+      where: {
+        id: sessionId,
+      },
+    });
+
+    return session;
+  });
+}