‘there Isn’t Really Another Choice:’ Signal Chief Explains Why The Encrypted Messenger Relies On Aws

After past week’s major Amazon Web Services (AWS) outage took Signal on pinch it, Elon Musk was quick to criticize nan encrypted messaging app’s reliance connected large tech. But Signal president Meredith Whittaker argues that nan institution didn’t person immoderate different prime but to usage AWS aliases different awesome unreality provider.

“The problem present is not that Signal ‘chose’ to tally connected AWS,” Whittaker writes successful a bid of posts connected Bluesky. “The problem is nan attraction of powerfulness successful nan infrastructure abstraction that intends location isn’t really different choice: nan full stack, practically speaking, is owned by 3-4 players.”

In nan thread, Whittaker says nan number of group who didn’t recognize Signal uses AWS is “concerning,” arsenic it indicates they aren’t alert of conscionable really concentrated nan unreality infrastructure manufacture is. “The mobility isn’t ‘why does Signal usage AWS?’” Whittaker writes. “It’s to look astatine nan infrastructural requirements of immoderate global, real-time, wide comms level and inquire really it is that we sewage to a spot wherever there’s nary realistic replacement to AWS and nan different hyperscalers.”

📣THREAD: It’s astonishing to maine that truthful galore group were amazed to study that Signal runs partially connected AWS (something we tin do because we usage encryption to make judge nary 1 but you–not AWS, not Signal, not anyone–can entree your comms). It’s besides concerning. 1/

— Meredith Whittaker (@meredithmeredith.bsky.social) 2025-10-27T10:38:41.229Z

Whittaker notes that AWS, Microsoft Azure, and Google’s unreality services are nan only viable options that Signal tin usage to supply reliable work connected a world standard without spending billions of dollars to build its own. “Running a low-latency level for instant comms tin of carrying millions of concurrent audio/video calls requires a pre-built, planet-spanning web of compute, retention and separator beingness that requires changeless maintenance, important energy and persistent attraction and monitoring,” Whittaker says.

She adds that Signal only “partly” runs connected AWS and uses encryption to guarantee Signal and AWS can’t spot your conversations. Signal was acold from nan only institution affected by nan AWS outage, as it besides brought down Starbucks, nan Epic Games Store, Ring doorbells, Snapchat, Alexa devices, and moreover smart beds.

“My metallic lining dream is that AWS going down tin beryllium a learning moment, successful which nan risks of concentrating nan tense strategy of our world successful nan hands of a fewer players go very clear,” Whittaker writes.