Is it possible to build a secure web-app using Webflow where users can create accounts, login, submit confidential information through an online form, update the form with attachments and text, integrate Zoom for scheduling calls, and send SMS and emails, with the form input integrated into a serverless DB like Airtable?

Yes, it is definitely possible to build a secure web app with Webflow that can fulfill all the requirements you mentioned. Here's an outline of how you can achieve each feature using Webflow's capabilities as well as integrating third-party services:

1. User Accounts and Authentication:
Webflow doesn't natively support user account systems, but you can integrate third-party authentication services like Firebase or Auth0. These services provide secure user authentication and management, allowing users to create accounts, login, and handle password recovery.

2. Confidential Form Submission:
You can create a custom form in Webflow to capture confidential information. Ensure that your form submission uses HTTPS secure protocol to encrypt data in transit. Additionally, you can add additional security by implementing reCAPTCHA to prevent spam and bot submissions.

3. Form Attachments and Updates:
Webflow's built-in form functionality may not support file attachments directly. However, you can use form submission services like Zapier or Integromat to receive form data, including attachments, and integrate them with other applications like Airtable. These services provide triggers and actions that enable you to route form data to Airtable, along with the ability to handle attachments.

4. Zoom Integration for Scheduling Calls:
Webflow allows you to embed HTML code on your pages, so you can easily integrate Zoom into your web app. You can use the Zoom API and embed the necessary code to facilitate scheduling calls, sending invites, and managing meeting details.

5. SMS and Email Notifications:
To send SMS and email notifications, you can integrate third-party services like Twilio or SendGrid. These services provide APIs that allow you to programmatically send messages and emails. You can trigger these notifications based on specific events or form submissions within your Webflow web app.

6. Integration with Airtable or Serverless Database:
Webflow has limited backend capabilities, but you can use services like Airtable, Google Sheets, or Firebase to create a serverless database. These services provide APIs that you can utilize to store and retrieve data from your web app. By setting up webhooks or using tools like Zapier or Integromat, you can connect form submissions to your serverless database and send relevant data to Airtable or any other chosen database platform.

Overall, by combining Webflow's front-end design and layout capabilities with the integration of various third-party services, you can create a secure web app that allows users to create accounts, submit confidential information, integrate with Zoom, and send SMS and email notifications while storing form data in a serverless database like Airtable.