diff --git a/.changeset/heavy-points-clean.md b/.changeset/heavy-points-clean.md
new file mode 100644
index 000000000..9c83c72c3
--- /dev/null
+++ b/.changeset/heavy-points-clean.md
@@ -0,0 +1,5 @@
+---
+"active-campaign-client": minor
+---
+
+Add sync users script
diff --git a/packages/active-campaign-client/src/scripts/sync_all_users.ts b/packages/active-campaign-client/src/scripts/sync_all_users.ts
new file mode 100644
index 000000000..81af09be6
--- /dev/null
+++ b/packages/active-campaign-client/src/scripts/sync_all_users.ts
@@ -0,0 +1,172 @@
+// This script is only ment to be launched manually to sync all users from Cognito to ActiveCampaign
+/* eslint-disable */
+import { ActiveCampaignClient } from '../clients/activeCampaignClient';
+import { CognitoIdentityServiceProvider } from 'aws-sdk';
+import { DynamoDBClient, QueryCommand } from '@aws-sdk/client-dynamodb';
+import { ContactPayload } from '../types/contactPayload';
+import * as dotenv from 'dotenv';
+
+const activeCampaignClient = new ActiveCampaignClient(
+  process.env.TEST_AC_BASE_URL,
+  process.env.TEST_AC_API_KEY
+);
+
+const userPoolId = () => process.env.COGNITO_USER_POOL_ID!;
+
+// Initialize Cognito client
+const cognito = new CognitoIdentityServiceProvider({
+  region: process.env.AWS_REGION,
+  credentials: {
+    accessKeyId: process.env.AWS_ACCESS_KEY_ID!,
+    secretAccessKey: process.env.AWS_SECRET_ACCESS_KEY!,
+  },
+});
+
+export async function getSubscribedWebinars(username: string): Promise<any[]> {
+  try {
+    const dynamoClient = new DynamoDBClient({ region: process.env.AWS_REGION });
+    const command = new QueryCommand({
+      TableName: process.env.DYNAMO_WEBINARS_TABLE_NAME,
+      KeyConditionExpression: 'username = :username',
+      ExpressionAttributeValues: {
+        ':username': { S: username },
+      },
+    });
+
+    const response = await dynamoClient.send(command);
+    return response.Items as any[];
+  } catch (error) {
+    console.error('Error querying items by username:', error);
+    return [];
+  }
+}
+
+// Load all users from Cognito
+async function listAllUsers() {
+  try {
+    const allUsers = [];
+    let paginationToken = undefined;
+
+    do {
+      const params: any = {
+        UserPoolId: userPoolId(),
+        PaginationToken: paginationToken,
+      };
+
+      const response = await cognito.listUsers(params).promise();
+      if (response.Users) {
+        allUsers.push(...response.Users);
+      }
+      paginationToken = response.PaginationToken;
+    } while (paginationToken);
+
+    return allUsers;
+  } catch (error) {
+    console.error('Error fetching users:', error);
+    return [];
+  }
+}
+
+async function main() {
+  dotenv.config();
+  console.log(process.env);
+  const users = await listAllUsers();
+
+  console.log(process.env.DYNAMO_WEBINARS_TABLE_NAME);
+
+  const usersAndWebinars = [];
+
+  for (const user of users) {
+    if (!user.Username) {
+      continue;
+    }
+    const subscribedWebinars = await getSubscribedWebinars(user.Username);
+    usersAndWebinars.push({
+      user,
+      subscribedWebinars: subscribedWebinars
+        .map((webinar: any) => webinar?.webinarId?.S)
+        .filter(Boolean),
+    });
+  }
+
+  const allLists: any = await activeCampaignClient.getLists();
+
+  const webinarIdByName = allLists.lists.reduce((acc: any, list: any) => {
+    acc[list.name] = Number(list.id);
+    return acc;
+  }, {});
+
+  const emails = new Set();
+  // remove duplicates on emails
+  const uniqueUsersAndWebinars = usersAndWebinars.filter((userAndWebinars) => {
+    const email = userAndWebinars?.user?.Attributes?.find(
+      (attr: any) => attr.Name === 'email'
+    )?.Value;
+    if (emails.has(email)) {
+      return false;
+    }
+    emails.add(email);
+    return true;
+  });
+
+  // TODO: limit uniqueUsersAndWebinars to 10 remove after testing
+  const limitedUniqueUsersAndWebinars = uniqueUsersAndWebinars
+    .filter((userAndWebinars) => userAndWebinars.subscribedWebinars.length > 0)
+    .slice(0, 10);
+
+  const acPayload = limitedUniqueUsersAndWebinars.map(
+    (userAndWebinars, index) => {
+      const attributes = userAndWebinars.user.Attributes;
+      return {
+        contact: {
+          email: attributes?.find((attr: any) => attr.Name === 'email')?.Value,
+          firstName: attributes?.find((attr: any) => attr.Name === 'given_name')
+            ?.Value,
+          lastName: attributes?.find((attr: any) => attr.Name === 'family_name')
+            ?.Value,
+          phone: `cognito:${userAndWebinars.user.Username}`,
+          fieldValues: [
+            {
+              field: '2',
+              value: attributes?.find(
+                (attr: any) => attr.Name === 'custom:company_type'
+              )?.Value,
+            },
+            {
+              field: '1',
+              value: attributes?.find(
+                (attr: any) => attr.Name === 'custom:job_role'
+              )?.Value,
+            },
+            {
+              field: '3',
+              value:
+                attributes?.find(
+                  (attr: any) => attr.Name === 'custom:mailinglist_accepted'
+                )?.Value === 'true'
+                  ? 'TRUE'
+                  : 'FALSE',
+            },
+          ],
+        },
+        listIds: userAndWebinars.subscribedWebinars
+          .map((webinar: any) => webinarIdByName[webinar])
+          .filter(Boolean) as unknown as number[],
+      };
+    }
+  ) as unknown as readonly (ContactPayload & {
+    readonly listIds: readonly number[];
+  })[];
+
+  console.log(acPayload.filter((user: any) => user.listIds.length !== 0));
+
+  const response = await activeCampaignClient.bulkAddContactToList(acPayload);
+
+  console.log(response);
+}
+
+// Execute the main function
+main().catch((error) => {
+  console.error('Error executing sync:', error);
+  process.exit(1);
+});