This is the hardest one to get right, because WhatsApp has gotten very good at detecting third-party automation, and shluchim are losing accounts over it. The honest guidance from the group is to be conservative. The tools that promise easy mass-sending are the ones that get numbers restricted.
Start from consent: message people who gave you their number and expect to hear from you, and stop the moment someone asks to be removed. WhatsApp's enforcement leans heavily on whether recipients actually want your messages, so this is both the right thing and the best way to keep your number healthy.
The paths the community trusts:
The paths that get people burned:
The safe and genuinely useful half of WhatsApp plus AI is voice notes. Apps like Zapia, TranscribeMe, and Sofer.ai transcribe a long voice note in seconds, and you can paste that text into any model for a summary or a set of follow-ups.
The full breakdown, including what the group uses instead, is on the community wiki: WhatsApp Automation.
Discussions are coming soon. Every skill, app, and guide will carry its own thread where shluchim compare notes on what worked.