Yes, Chaiiwala is considered halal. For example, the Chaiiwala Knightsbridge location has reviews on Google Maps that mention it as a halal restaurant.

However, there is no specific mention of halal certification or cross-contamination guarantees in their official allergen documentation.

For confirmation, it is always best to check directly with the specific location you plan to visit. You can view their allergen information here.

And Allah knows best.