!!!
This functionality requires a PAID or FREE TRIAL account on Sociocs.
!!!

You can use contact lists in the Contacts page to upload a contact once, and use it in the bulk messaging or in the Zapier integration.

## Useful with channels

- SMS (with Telnyx)
- SMS (with Twilio)
- WhatsApp (with Gupshup)
- WhatsApp (with Twilio)

## Useful with functionality

- [Bulk messaging](/bulk-messaging.md)
- [Zapier integration](/integrations/zapier/introduction.md)

## Data sources supported

- CSV file
- Excel file