We are looking to replace Zoho CRM with a custom-built CRM stack using: Airtable (database/backend) n8n (automation & integrations) Stacker or similar (secure user login interface) We want something that functions similarly to Zoho CRM in usability and structure — but with: More flexibility Unlimited custom fields Deep AI integration capabilities Lower long-term per-user costs Full control over automation and workflows This will be a multi-user CRM with role-based access.