diff --git a/packages/browser/src/profiling/integration.ts b/packages/browser/src/profiling/integration.ts
index 5173705feaa6..3f823429c122 100644
--- a/packages/browser/src/profiling/integration.ts
+++ b/packages/browser/src/profiling/integration.ts
@@ -1,5 +1,5 @@
-import { getCurrentScope } from '@sentry/core';
-import type { Client, EventEnvelope, EventProcessor, Hub, Integration, Transaction } from '@sentry/types';
+import { convertIntegrationFnToClass, getCurrentScope } from '@sentry/core';
+import type { EventEnvelope, IntegrationFn, Transaction } from '@sentry/types';
 import type { Profile } from '@sentry/types/src/profiling';
 import { logger } from '@sentry/utils';
 
@@ -16,108 +16,97 @@ import {
   takeProfileFromGlobalCache,
 } from './utils';
 
-/**
- * Browser profiling integration. Stores any event that has contexts["profile"]["profile_id"]
- * This exists because we do not want to await async profiler.stop calls as transaction.finish is called
- * in a synchronous context. Instead, we handle sending the profile async from the promise callback and
- * rely on being able to pull the event from the cache when we need to construct the envelope. This makes the
- * integration less reliable as we might be dropping profiles when the cache is full.
- *
- * @experimental
- */
-export class BrowserProfilingIntegration implements Integration {
-  public static id: string = 'BrowserProfilingIntegration';
+const INTEGRATION_NAME = 'BrowserProfiling';
 
-  public readonly name: string;
+const browserProfilingIntegration: IntegrationFn = () => {
+  return {
+    name: INTEGRATION_NAME,
+    setup(client) {
+      const scope = getCurrentScope();
 
-  /** @deprecated This is never set. */
-  public getCurrentHub?: () => Hub;
+      const transaction = scope.getTransaction();
 
-  public constructor() {
-    this.name = BrowserProfilingIntegration.id;
-  }
-
-  /**
-   * @inheritDoc
-   */
-  public setupOnce(_addGlobalEventProcessor: (callback: EventProcessor) => void, _getCurrentHub: () => Hub): void {
-    // noop
-  }
-
-  /** @inheritdoc */
-  public setup(client: Client): void {
-    const scope = getCurrentScope();
-
-    const transaction = scope.getTransaction();
-
-    if (transaction && isAutomatedPageLoadTransaction(transaction)) {
-      if (shouldProfileTransaction(transaction)) {
-        startProfileForTransaction(transaction);
-      }
-    }
-
-    if (typeof client.on !== 'function') {
-      logger.warn('[Profiling] Client does not support hooks, profiling will be disabled');
-      return;
-    }
-
-    client.on('startTransaction', (transaction: Transaction) => {
-      if (shouldProfileTransaction(transaction)) {
-        startProfileForTransaction(transaction);
-      }
-    });
-
-    client.on('beforeEnvelope', (envelope): void => {
-      // if not profiles are in queue, there is nothing to add to the envelope.
-      if (!getActiveProfilesCount()) {
-        return;
+      if (transaction && isAutomatedPageLoadTransaction(transaction)) {
+        if (shouldProfileTransaction(transaction)) {
+          startProfileForTransaction(transaction);
+        }
       }
 
-      const profiledTransactionEvents = findProfiledTransactionsFromEnvelope(envelope);
-      if (!profiledTransactionEvents.length) {
+      if (typeof client.on !== 'function') {
+        logger.warn('[Profiling] Client does not support hooks, profiling will be disabled');
         return;
       }
 
-      const profilesToAddToEnvelope: Profile[] = [];
-
-      for (const profiledTransaction of profiledTransactionEvents) {
-        const context = profiledTransaction && profiledTransaction.contexts;
-        const profile_id = context && context['profile'] && context['profile']['profile_id'];
-        const start_timestamp = context && context['profile'] && context['profile']['start_timestamp'];
-
-        if (typeof profile_id !== 'string') {
-          DEBUG_BUILD && logger.log('[Profiling] cannot find profile for a transaction without a profile context');
-          continue;
+      client.on('startTransaction', (transaction: Transaction) => {
+        if (shouldProfileTransaction(transaction)) {
+          startProfileForTransaction(transaction);
         }
+      });
 
-        if (!profile_id) {
-          DEBUG_BUILD && logger.log('[Profiling] cannot find profile for a transaction without a profile context');
-          continue;
+      client.on('beforeEnvelope', (envelope): void => {
+        // if not profiles are in queue, there is nothing to add to the envelope.
+        if (!getActiveProfilesCount()) {
+          return;
         }
 
-        // Remove the profile from the transaction context before sending, relay will take care of the rest.
-        if (context && context['profile']) {
-          delete context.profile;
+        const profiledTransactionEvents = findProfiledTransactionsFromEnvelope(envelope);
+        if (!profiledTransactionEvents.length) {
+          return;
         }
 
-        const profile = takeProfileFromGlobalCache(profile_id);
-        if (!profile) {
-          DEBUG_BUILD && logger.log(`[Profiling] Could not retrieve profile for transaction: ${profile_id}`);
-          continue;
+        const profilesToAddToEnvelope: Profile[] = [];
+
+        for (const profiledTransaction of profiledTransactionEvents) {
+          const context = profiledTransaction && profiledTransaction.contexts;
+          const profile_id = context && context['profile'] && context['profile']['profile_id'];
+          const start_timestamp = context && context['profile'] && context['profile']['start_timestamp'];
+
+          if (typeof profile_id !== 'string') {
+            DEBUG_BUILD && logger.log('[Profiling] cannot find profile for a transaction without a profile context');
+            continue;
+          }
+
+          if (!profile_id) {
+            DEBUG_BUILD && logger.log('[Profiling] cannot find profile for a transaction without a profile context');
+            continue;
+          }
+
+          // Remove the profile from the transaction context before sending, relay will take care of the rest.
+          if (context && context['profile']) {
+            delete context.profile;
+          }
+
+          const profile = takeProfileFromGlobalCache(profile_id);
+          if (!profile) {
+            DEBUG_BUILD && logger.log(`[Profiling] Could not retrieve profile for transaction: ${profile_id}`);
+            continue;
+          }
+
+          const profileEvent = createProfilingEvent(
+            profile_id,
+            start_timestamp as number | undefined,
+            profile,
+            profiledTransaction as ProfiledEvent,
+          );
+          if (profileEvent) {
+            profilesToAddToEnvelope.push(profileEvent);
+          }
         }
 
-        const profileEvent = createProfilingEvent(
-          profile_id,
-          start_timestamp as number | undefined,
-          profile,
-          profiledTransaction as ProfiledEvent,
-        );
-        if (profileEvent) {
-          profilesToAddToEnvelope.push(profileEvent);
-        }
-      }
+        addProfilesToEnvelope(envelope as EventEnvelope, profilesToAddToEnvelope);
+      });
+    },
+  };
+};
 
-      addProfilesToEnvelope(envelope as EventEnvelope, profilesToAddToEnvelope);
-    });
-  }
-}
+/**
+ * Browser profiling integration. Stores any event that has contexts["profile"]["profile_id"]
+ * This exists because we do not want to await async profiler.stop calls as transaction.finish is called
+ * in a synchronous context. Instead, we handle sending the profile async from the promise callback and
+ * rely on being able to pull the event from the cache when we need to construct the envelope. This makes the
+ * integration less reliable as we might be dropping profiles when the cache is full.
+ *
+ * @experimental
+ */
+// eslint-disable-next-line deprecation/deprecation
+export const BrowserProfilingIntegration = convertIntegrationFnToClass(INTEGRATION_NAME, browserProfilingIntegration);
diff --git a/packages/bun/src/integrations/bunserver.ts b/packages/bun/src/integrations/bunserver.ts
index 6644728c19b3..89d245908400 100644
--- a/packages/bun/src/integrations/bunserver.ts
+++ b/packages/bun/src/integrations/bunserver.ts
@@ -1,28 +1,30 @@
-import { Transaction, captureException, continueTrace, runWithAsyncContext, startSpan } from '@sentry/core';
-import type { Integration } from '@sentry/types';
+import {
+  Transaction,
+  captureException,
+  continueTrace,
+  convertIntegrationFnToClass,
+  runWithAsyncContext,
+  startSpan,
+} from '@sentry/core';
+import type { IntegrationFn } from '@sentry/types';
 import { getSanitizedUrlString, parseUrl } from '@sentry/utils';
 
+const INTEGRATION_NAME = 'BunServer';
+
+const bunServerIntegration: IntegrationFn = () => {
+  return {
+    name: INTEGRATION_NAME,
+    setupOnce() {
+      instrumentBunServe();
+    },
+  };
+};
+
 /**
  * Instruments `Bun.serve` to automatically create transactions and capture errors.
  */
-export class BunServer implements Integration {
-  /**
-   * @inheritDoc
-   */
-  public static id: string = 'BunServer';
-
-  /**
-   * @inheritDoc
-   */
-  public name: string = BunServer.id;
-
-  /**
-   * @inheritDoc
-   */
-  public setupOnce(): void {
-    instrumentBunServe();
-  }
-}
+// eslint-disable-next-line deprecation/deprecation
+export const BunServer = convertIntegrationFnToClass(INTEGRATION_NAME, bunServerIntegration);
 
 /**
  * Instruments Bun.serve by patching it's options.
diff --git a/packages/core/src/metrics/integration.ts b/packages/core/src/metrics/integration.ts
index 9ce7f836ca8c..0c3fa626a9e5 100644
--- a/packages/core/src/metrics/integration.ts
+++ b/packages/core/src/metrics/integration.ts
@@ -1,38 +1,23 @@
-import type { ClientOptions, Integration } from '@sentry/types';
+import type { ClientOptions, IntegrationFn } from '@sentry/types';
 import type { BaseClient } from '../baseclient';
+import { convertIntegrationFnToClass } from '../integration';
 import { SimpleMetricsAggregator } from './simpleaggregator';
 
+const INTEGRATION_NAME = 'MetricsAggregator';
+
+const metricsAggregatorIntegration: IntegrationFn = () => {
+  return {
+    name: INTEGRATION_NAME,
+    setup(client: BaseClient<ClientOptions>) {
+      client.metricsAggregator = new SimpleMetricsAggregator(client);
+    },
+  };
+};
+
 /**
  * Enables Sentry metrics monitoring.
  *
  * @experimental This API is experimental and might having breaking changes in the future.
  */
-export class MetricsAggregator implements Integration {
-  /**
-   * @inheritDoc
-   */
-  public static id: string = 'MetricsAggregator';
-
-  /**
-   * @inheritDoc
-   */
-  public name: string;
-
-  public constructor() {
-    this.name = MetricsAggregator.id;
-  }
-
-  /**
-   * @inheritDoc
-   */
-  public setupOnce(): void {
-    // Do nothing
-  }
-
-  /**
-   * @inheritDoc
-   */
-  public setup(client: BaseClient<ClientOptions>): void {
-    client.metricsAggregator = new SimpleMetricsAggregator(client);
-  }
-}
+// eslint-disable-next-line deprecation/deprecation
+export const MetricsAggregator = convertIntegrationFnToClass(INTEGRATION_NAME, metricsAggregatorIntegration);
diff --git a/packages/integration-shims/src/Feedback.ts b/packages/integration-shims/src/Feedback.ts
index 3f41a15a8231..78db6083d3c2 100644
--- a/packages/integration-shims/src/Feedback.ts
+++ b/packages/integration-shims/src/Feedback.ts
@@ -1,4 +1,5 @@
 import type { Integration } from '@sentry/types';
+import { consoleSandbox } from '@sentry/utils';
 
 /**
  * This is a shim for the Feedback integration.
@@ -20,8 +21,10 @@ class FeedbackShim implements Integration {
   public constructor(_options: any) {
     this.name = FeedbackShim.id;
 
-    // eslint-disable-next-line no-console
-    console.error('You are using new Feedback() even though this bundle does not include Feedback.');
+    consoleSandbox(() => {
+      // eslint-disable-next-line no-console
+      console.error('You are using new Feedback() even though this bundle does not include Feedback.');
+    });
   }
 
   /** jsdoc */