diff --git a/package-lock.json b/package-lock.json
index c8f5c70..a01150e 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -23,6 +23,7 @@
         "@tanstack/react-virtual": "^3.13.12",
         "@tosspayments/payment-widget-sdk": "^0.12.0",
         "@tosspayments/tosspayments-sdk": "^2.4.0",
+        "@vercel/speed-insights": "^1.2.0",
         "axios": "^1.11.0",
         "class-variance-authority": "^0.7.1",
         "clsx": "^2.1.1",
@@ -10030,6 +10031,41 @@
         "win32"
       ]
     },
+    "node_modules/@vercel/speed-insights": {
+      "version": "1.2.0",
+      "resolved": "https://registry.npmjs.org/@vercel/speed-insights/-/speed-insights-1.2.0.tgz",
+      "integrity": "sha512-y9GVzrUJ2xmgtQlzFP2KhVRoCglwfRQgjyfY607aU0hh0Un6d0OUyrJkjuAlsV18qR4zfoFPs/BiIj9YDS6Wzw==",
+      "hasInstallScript": true,
+      "license": "Apache-2.0",
+      "peerDependencies": {
+        "@sveltejs/kit": "^1 || ^2",
+        "next": ">= 13",
+        "react": "^18 || ^19 || ^19.0.0-rc",
+        "svelte": ">= 4",
+        "vue": "^3",
+        "vue-router": "^4"
+      },
+      "peerDependenciesMeta": {
+        "@sveltejs/kit": {
+          "optional": true
+        },
+        "next": {
+          "optional": true
+        },
+        "react": {
+          "optional": true
+        },
+        "svelte": {
+          "optional": true
+        },
+        "vue": {
+          "optional": true
+        },
+        "vue-router": {
+          "optional": true
+        }
+      }
+    },
     "node_modules/@vitest/expect": {
       "version": "0.34.7",
       "resolved": "https://registry.npmjs.org/@vitest/expect/-/expect-0.34.7.tgz",
diff --git a/package.json b/package.json
index f0f6f17..6c6cf3e 100644
--- a/package.json
+++ b/package.json
@@ -42,6 +42,7 @@
     "@tanstack/react-virtual": "^3.13.12",
     "@tosspayments/payment-widget-sdk": "^0.12.0",
     "@tosspayments/tosspayments-sdk": "^2.4.0",
+    "@vercel/speed-insights": "^1.2.0",
     "axios": "^1.11.0",
     "class-variance-authority": "^0.7.1",
     "clsx": "^2.1.1",
diff --git a/src/app/layout.tsx b/src/app/layout.tsx
index f04898d..76857cd 100644
--- a/src/app/layout.tsx
+++ b/src/app/layout.tsx
@@ -1,6 +1,7 @@
 import type { Metadata } from 'next';
 import { Suspense } from 'react';
 import { pretendard } from '@/lib/fonts';
+import { SpeedInsights } from '@vercel/speed-insights/next';
 import ClientLayout from '@/components/common/ClientLayout';
 import './globals.css';
 
@@ -70,6 +71,7 @@ export default function RootLayout({
         <Suspense>
           <ClientLayout>{children}</ClientLayout>
         </Suspense>
+        <SpeedInsights />
       </body>
     </html>
   );
diff --git a/src/store/likeStore.ts b/src/store/likeStore.ts
index 4ea1591..a90d965 100644
--- a/src/store/likeStore.ts
+++ b/src/store/likeStore.ts
@@ -1,101 +1,99 @@
 import { create } from 'zustand';
+import { persist, createJSONStorage } from 'zustand/middleware';
 import { Activity } from '@/types/activities.type';
 
 interface FavoritesState {
-  favorites: Activity[];
-  currentUserId: number | null;
+  favoritesByUser: Record<number, Activity[]>; // 모든 사용자의 찜 목록을 저장
+  currentUserId: number | null; // 현재 로그인한 사용자 ID (세션 상태)
+  favorites: Activity[]; // 현재 사용자의 찜 목록 (UI용)
+
   initializeUser: (userId: number) => void;
   isFavorite: (activityId: number) => boolean;
   removeFavorite: (activityId: number) => void;
   toggleFavorite: (activity: Activity) => void;
   clearFavorites: () => void;
 }
+export const useFavoritesStore = create<FavoritesState>()(
+  persist(
+    (set, get) => ({
+      favoritesByUser: {},
+      currentUserId: null,
+      favorites: [],
 
-// 사용자별 로컬 키 생성
-const getUserStorageKey = (userId: number) => `favorites-${userId}`;
+      initializeUser: (userId) => {
+        const { currentUserId, favoritesByUser } = get();
+        // 이미 같은 사용자로 초기화된 경우 중복 실행 방지
+        if (currentUserId === userId) return;
 
-// 사용자별 찜 목록 불러오기
-const loadUserFavorites = (userId: number): Activity[] => {
-  try {
-    const key = getUserStorageKey(userId);
-    const saved = localStorage.getItem(key);
-    return saved ? JSON.parse(saved) : [];
-  } catch (error) {
-    console.error('찜 목록 불러오기 실패:', error);
-    return [];
-  }
-};
+        // `favoritesByUser`에서 현재 사용자의 찜 목록을 가져와 UI용 상태에 설정
+        const userFavorites = favoritesByUser[userId] || [];
+        set({
+          currentUserId: userId,
+          favorites: userFavorites,
+        });
+      },
 
-// 사용자별 찜 목록 저장
-const saveUserFavorites = (userId: number, favorites: Activity[]) => {
-  try {
-    const key = getUserStorageKey(userId);
-    localStorage.setItem(key, JSON.stringify(favorites));
-  } catch (error) {
-    console.error('찜 목록 저장 실패:', error);
-  }
-};
+      isFavorite: (activityId) => {
+        // 현재 사용자의 찜 목록에서 확인
+        return get().favorites.some((fav) => fav.id === activityId);
+      },
 
-export const useFavoritesStore = create<FavoritesState>()((set, get) => ({
-  favorites: [],
-  currentUserId: null,
-  // 사용자 판별
-  initializeUser: (userId) => {
-    const currentUserId = get().currentUserId;
-    // 이미 같은 사용자면 리턴
-    if (currentUserId === userId) return;
-    // 새 사용자의 찜 목록 로드
-    const userFavorites = loadUserFavorites(userId);
-    set({
-      currentUserId: userId,
-      favorites: userFavorites,
-    });
-  },
-  // 찜되어 있는지 확인
-  isFavorite: (activityId) => {
-    const state = get();
-    return state.favorites.some((fav) => fav.id === activityId);
-  },
-  // 찜목록에 제거
-  removeFavorite: (activityId) => {
-    const { currentUserId } = get();
+      removeFavorite: (activityId) => {
+        const { currentUserId, favorites } = get();
+        if (!currentUserId) {
+          console.warn('사용자가 로그인되지 않았습니다.');
+          return;
+        }
 
-    if (!currentUserId) {
-      console.warn('사용자가 로그인되지 않았습니다.');
-      return;
-    }
+        const newFavorites = favorites.filter((fav) => fav.id !== activityId);
 
-    set((state) => {
-      const newFavorites = state.favorites.filter((fav) => fav.id !== activityId);
-      saveUserFavorites(currentUserId, newFavorites);
-      return { favorites: newFavorites };
-    });
-  },
-  // 찜목록 토글 기능
-  toggleFavorite: (activity) => {
-    const { currentUserId } = get();
+        set((state) => ({
+          favorites: newFavorites, // UI 상태 업데이트
+          favoritesByUser: {
+            ...state.favoritesByUser,
+            [currentUserId]: newFavorites, // 영속성 상태 업데이트
+          },
+        }));
+      },
 
-    if (!currentUserId) {
-      console.warn('사용자가 로그인되지 않았습니다.');
-      return;
-    }
+      toggleFavorite: (activity) => {
+        const { currentUserId, favorites } = get();
+        if (!currentUserId) {
+          console.warn('사용자가 로그인되지 않았습니다.');
+          return;
+        }
 
-    let newFavorites;
-    set((state) => {
-      const isAlreadyFavorite = get().isFavorite(activity.id);
-      if (isAlreadyFavorite) {
-        newFavorites = state.favorites.filter((fav) => fav.id !== activity.id);
-      } else {
-        newFavorites = [...state.favorites, activity];
-      }
-      saveUserFavorites(currentUserId, newFavorites);
-      return { favorites: newFavorites };
-    });
-  },
-  clearFavorites: () => {
-    set({
-      favorites: [],
-      currentUserId: null,
-    });
-  },
-}));
+        const isAlreadyFavorite = get().isFavorite(activity.id);
+        const newFavorites = isAlreadyFavorite
+          ? favorites.filter((fav) => fav.id !== activity.id)
+          : [...favorites, activity];
+
+        set((state) => ({
+          favorites: newFavorites, // UI 상태 업데이트
+          favoritesByUser: {
+            ...state.favoritesByUser,
+            [currentUserId]: newFavorites, // 영속성 상태 업데이트
+          },
+        }));
+      },
+
+      clearFavorites: () => {
+        // 로그아웃 시 현재 사용자 정보만 초기화
+        set({
+          currentUserId: null,
+          favorites: [],
+        });
+      },
+    }),
+    {
+      name: 'favorites-storage', // localStorage에 저장될 고유한 키
+      storage: createJSONStorage(() => localStorage),
+      // `favoritesByUser` 상태만 localStorage에 저장
+      partialize: (state) => ({ favoritesByUser: state.favoritesByUser }),
+      // 스토리지에서 데이터를 성공적으로 불러왔을 때 실행
+      onRehydrateStorage: () => () => {
+        console.log('찜 목록을 성공적으로 불러왔습니다.');
+      },
+    },
+  ),
+);
diff --git a/src/store/recentlyWatched.ts b/src/store/recentlyWatched.ts
index fc70ef2..378e89c 100644
--- a/src/store/recentlyWatched.ts
+++ b/src/store/recentlyWatched.ts
@@ -1,5 +1,6 @@
 import { create } from 'zustand';
 import { Activity } from '@/types/activities.type';
+import { persist, createJSONStorage } from 'zustand/middleware';
 
 interface ViewedActivity extends Activity {
   viewedAt: string; // ISO string
@@ -16,23 +17,6 @@ interface RecentViewedState {
 const WEEK_MS = 7 * 24 * 60 * 60 * 1000;
 const STORAGE_KEY = 'recent-viewed';
 
-const loadRecent = (): ViewedActivity[] => {
-  try {
-    const saved = localStorage.getItem(STORAGE_KEY);
-    return saved ? JSON.parse(saved) : [];
-  } catch {
-    return [];
-  }
-};
-
-const saveRecent = (items: ViewedActivity[]) => {
-  try {
-    localStorage.setItem(STORAGE_KEY, JSON.stringify(items));
-  } catch (e) {
-    console.error('최근 본 목록 저장 실패:', e);
-  }
-};
-
 const formatDateLabel = (date: Date) => {
   const today = new Date();
   const yesterday = new Date(Date.now() - 86400000);
@@ -64,38 +48,46 @@ const groupByLabel = (items: ViewedActivity[]) => {
   return groups;
 };
 
-export const useRecentViewedStore = create<RecentViewedState>((set) => {
-  const initial = loadRecent();
-  return {
-    recentViewed: initial,
-    grouped: groupByLabel(initial),
-
-    addViewed: (activity) => {
-      const now = new Date();
-      const weekAgo = now.getTime() - WEEK_MS;
-
-      set((state) => {
-        const filtered = state.recentViewed.filter(
-          (a) => a.id !== activity.id && new Date(a.viewedAt).getTime() >= weekAgo,
-        );
-
-        const newItems = [{ ...activity, viewedAt: now.toISOString() }, ...filtered];
-
-        saveRecent(newItems);
-        return { recentViewed: newItems, grouped: groupByLabel(newItems) };
-      });
-    },
-
-    removeViewed: (activityId) =>
-      set((state) => {
-        const newItems = state.recentViewed.filter((a) => a.id !== activityId);
-        saveRecent(newItems);
-        return { recentViewed: newItems, grouped: groupByLabel(newItems) };
-      }),
-
-    clearViewed: () => {
-      saveRecent([]);
-      set({ recentViewed: [], grouped: {} });
+export const useRecentViewedStore = create<RecentViewedState>()(
+  persist(
+    (set) => ({
+      recentViewed: [],
+      grouped: {},
+
+      addViewed: (activity) => {
+        const now = new Date();
+        const weekAgo = now.getTime() - WEEK_MS;
+
+        set((state) => {
+          const filtered = state.recentViewed.filter(
+            (a) => a.id !== activity.id && new Date(a.viewedAt).getTime() >= weekAgo,
+          );
+
+          const newItems = [{ ...activity, viewedAt: now.toISOString() }, ...filtered];
+
+          return { recentViewed: newItems, grouped: groupByLabel(newItems) };
+        });
+      },
+
+      removeViewed: (activityId) =>
+        set((state) => {
+          const newItems = state.recentViewed.filter((a) => a.id !== activityId);
+          return { recentViewed: newItems, grouped: groupByLabel(newItems) };
+        }),
+
+      clearViewed: () => {
+        set({ recentViewed: [], grouped: {} });
+      },
+    }),
+    {
+      name: STORAGE_KEY,
+      storage: createJSONStorage(() => localStorage),
+      partialize: (state) => ({ recentViewed: state.recentViewed }),
+      onRehydrateStorage: () => (state) => {
+        if (state) {
+          state.grouped = groupByLabel(state.recentViewed);
+        }
+      },
     },
-  };
-});
+  ),
+);