Which Database Should I Use for a WhatsApp Bot with n8n?

Below is some guidance regarding using SQLite with your WhatsApp bot project in n8n:

Using SQLite in n8n

n8n uses SQLite as the default database if no other database is defined. It stores credentials, past executions, and workflows in a single file (typically located at ~/.n8n/database.sqlite on self-hosted instances). For many small projects with limited data, SQLite is a valid and budget-friendly choice.

Accessing SQLite

Since SQLite is used behind the scenes by n8n, you typically don’t interact with it directly during workflow creation. Instead, you build workflows using the provided nodes. When your workflows execute (for example, logging WhatsApp interactions) the execution data is saved automatically into the SQLite database.

If you need to perform more complex queries or access stored client data outside of n8n, you could open the SQLite file with an external tool (such as the SQLite command-line client or a GUI tool). However, with n8n cloud, direct access might be limited since the environment is managed.

Security & Scaling Considerations

• Sensitive Data: Although SQLite can handle small-scale client data, ensure you secure access to your instance. For sensitive details, consider additional encryption or dedicated data storage solutions if needed.

• Workload & Data Volume: SQLite is well suited for smaller projects. However, if you anticipate growth in data volume or workflow complexity in the future, you might later consider migrating to a more scalable system like PostgresDB.

Summary Recommendation

For a small project with limited data and budget:

• Using the built-in SQLite support in n8n is appropriate.
• Manage your workflows through n8n nodes—the platform will handle saving and retrieving data.
• When running on n8n cloud, verify with your service provider regarding direct access or backups for the underlying database, especially if you plan to access client data for reporting or additional processing.

This approach should cover your current requirements while keeping the initial setup simple and cost-effective.