Notes from deployments: what WhatsApp and Instagram actually allow, why a template gets rejected, what a workflow costs to run, and the numbers we counted on the way. Written by the people who build them.
The 24-hour messaging window, the one private reply you get per comment, the seven-day human agent tag and why it is not for bots. The rules that decide whether an Instagram workflow survives its first month.
Youssef Kamal · Co-founder, Helm
From 1 October 2026 Meta charges per message for service messages and for utility templates sent inside the 24-hour customer service window. What that means for a business running support on WhatsApp, and what it does not change.
Youssef Kamal · Co-founder, Helm
INCORRECT_CATEGORY, silent re-categorisation from utility to marketing, a body that ends with a variable, missing samples. The rejection reasons we hit most often across a hundred-odd live templates, and what we changed each time.
Youssef Kamal · Co-founder, Helm