WhatsApp Does a Passive-Aggressive Stats Release to Call Out Others for Bullshit Metrics

WhatsApp now has 400 million active users.

Benchmark’s Mitch Lasky on App Discovery, Distribution and the Power of Chat Networks

The successful games investor chats about, well, chat.

With Private Messaging, Instagram and Twitter Continue Their Arms Race

It’s getting harder and harder to tell the two apps apart.

Twitter Wants to Know What You Watched on TV Last Night, So It’s Asking You What You Watched on TV Last Night

Just as important: What were you doing while you watched TV?

Russia’s Mail.ru Hopes to Crack U.S. Market With Mobile Chat and Email Programs

Sure it is a crowded market. But, says Mail.ru CEO Dmitry Grishin: “We can learn a lot and compete with the best companies.”

BlackBerry Racks Up 20 Million New BBM Users in a Week

Twenty million new users in a week is great, but what now?

AllThingsD Week in Review: BlackBerry Is Just Resting, and YouTube Goes Mobile First

The Top 10 stories that powered AllThingsD this week, in one convenient post.

Twitter Plans to Revamp Its Private Messaging Product

Apparently, even the “global town square” needs a good, private place for people to communicate.

BlackBerry’s Patent Portfolio Ripe for Picking

How much might BlackBerry’s patents be worth? And who might be interested in buying them?

Katy Perry’s New Music Video Is Told Almost Entirely Through WhatsApp

Katy Perry uses WhatsApp all day — on the elliptical, in the bath and even on the toilet.