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diff --git a/packages/renderer/src/components/sidebar/ServiceSwitcher.tsx b/packages/renderer/src/components/sidebar/ServiceSwitcher.tsx
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+++ b/packages/renderer/src/components/sidebar/ServiceSwitcher.tsx
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+/*
+ * Copyright (C)  2022 Kristóf Marussy <kristof@marussy.com>
+ *
+ * This file is part of Sophie.
+ *
+ * Sophie is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, version 3.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ *
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+import Tab from '@mui/material/Tab';
+import Tabs from '@mui/material/Tabs';
+import { alpha, styled } from '@mui/material/styles';
+import type { TFunction } from 'i18next';
+import { observer } from 'mobx-react-lite';
+import React from 'react';
+import { useTranslation } from 'react-i18next';
+
+import type RendererStore from '../../stores/RendererStore.js';
+import type Service from '../../stores/Service.js';
+import { getServicePanelID } from '../ServicePanel.js';
+
+import ServiceIcon from './ServiceIcon.js';
+
+const ServiceSwitcherRoot = styled(Tabs, {
+  name: 'ServiceSwitcher',
+  slot: 'Root',
+})({
+  // Move the indicator to the outer side of the window.
+  '.MuiTabs-indicator': {
+    left: 0,
+    right: 'auto',
+    width: 4,
+  },
+});
+
+const ServiceSwitcherTab = styled(Tab, {
+  name: 'ServiceSwitcher',
+  slot: 'Tab',
+})(({ theme }) => ({
+  minWidth: 0,
+  paddingInline: theme.spacing(2),
+  transition: theme.transitions.create('background-color', {
+    duration: theme.transitions.duration.shortest,
+  }),
+  '&.Mui-selected': {
+    backgroundColor:
+      theme.palette.mode === 'dark'
+        ? alpha(theme.palette.text.primary, 0.1)
+        : alpha(theme.palette.primary.light, 0.24),
+  },
+}));
+
+function getServiceTitle(service: Service, t: TFunction) {
+  const {
+    settings: { name },
+    directMessageCount,
+    indirectMessageCount,
+  } = service;
+  let messagesText: string | undefined;
+  if (indirectMessageCount > 0) {
+    messagesText =
+      directMessageCount > 0
+        ? t('service.title.directAndIndirectMessageCount', {
+            directMessageCount,
+            indirectMessageCount,
+          })
+        : t('service.title.indirectMessageCount', {
+            count: indirectMessageCount,
+          });
+  } else if (directMessageCount > 0) {
+    messagesText = t('service.title.directMessageCount', {
+      count: directMessageCount,
+    });
+  }
+  if (messagesText === undefined) {
+    return t('service.title.nameWithNoMessages', { name });
+  }
+  return t('service.title.nameWithMessages', { name, messages: messagesText });
+}
+
+function ServiceSwitcher({
+  store: { settings, services },
+}: {
+  store: RendererStore;
+}): JSX.Element {
+  const { t } = useTranslation();
+
+  const { selectedService } = settings;
+
+  return (
+    <ServiceSwitcherRoot
+      variant="scrollable"
+      orientation="vertical"
+      value={selectedService === undefined ? false : selectedService.id}
+      onChange={(_event, newValue: string) =>
+        settings.setSelectedServiceId(newValue)
+      }
+    >
+      {services.map((service) => (
+        <ServiceSwitcherTab
+          key={service.id}
+          value={service.id}
+          icon={<ServiceIcon service={service} />}
+          aria-label={getServiceTitle(service, t)}
+          aria-controls={getServicePanelID(service)}
+        />
+      ))}
+    </ServiceSwitcherRoot>
+  );
+}
+
+export default observer(ServiceSwitcher);