Naven
Communities
A parent group that does not become a phone book
A class WhatsApp group hands every parent's number to every other parent, including the ones nobody knows. A channel joined by a link does the same job without the exchange.
Who this is for
Class parent representatives and PTA groups of twenty to a hundred people.
How it is usually set up
One channel per class joined by link, and the school's own tool for anything official.
What Naven does not claim
Naven promises no security and no moderation. Messages are screened before they send against twelve published categories, by software written by one person — it misses things, and it is weaker in languages other than English. Calls are not screened at all. Naven is not end-to-end encrypted, which is what makes screening possible; anyone whose first requirement is end-to-end encryption should use Signal.
What it costs
Nothing. Naven is free, with no advertising, no paid tier and no data sale.