Why We Went All-In on WhatsApp (And Not Voice AI)
A software company explaining, on the record, the product it decided not to build. The busiest minute on the biggest property website in the country is 8.48pm on a Wednesday, an hour when a phone call is socially impossible, and Sky and Sterling argue that the industry answered that shift by automating the agent's oldest habit rather than the customer's actual behaviour. SalesRook prototyped voice AI, watched the improvement curve flatten short of the bar, and shelved it. Two synthetic presenters then take the obvious objection to themselves head on: the line that matters is not machine against human, it is whether a thing is disclosed, chosen and easy to step past.
8.48pm
Wednesday, the busiest minute on the UK's biggest property site
7 in 10
Britons rarely or never answer an unrecognised number (YouGov)
64%
of 5,728 customers would rather companies did not use AI in service (Gartner)
3 days
how long one London agency group kept its new voice AI switched on
In this episode
- Why the nine o'clock ring-round is heritage rather than failure, and what automating it really automates
- Why we built a voice AI and shelved it, including the London agency group that switched theirs off within three days
- The uncanny valley, named in 1970, and why a better synthetic voice makes the moment of discovery worse rather than better
- Two AI presenters answer the objection to themselves: disclosed, chosen, escapable, and why an interrupted message is only paused
Who is in this episode
- Sky and Sterling — hosts, SalesRook
- Sebastien Lewis — Managing Director, Warren Powell Richards. In his own words, used with permission
- Ed Gain — formerly of Rezx. An industry peer, not a customer of ours. Used with permission
- Tom Doyle — Founding Director, Moove Happy, previously Client Relationship Manager at Duncan Yeardley. In his own words, used with permission
Every figure in the episode is sourced and explained in the report.


