Reused Instagram auth
No Threads signup. Login with Instagram. Massive shortcut.
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Reused Instagram auth
No Threads signup. Login with Instagram. Massive shortcut.
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Reused following graph
Follow the same people you followed on IG (opt-in). Instant social graph on launch day.
New feed service
Timeline ranking distinct from IG. Text-first. Different candidate generation but same TAO + Cassandra tier.
ActivityPub for Fediverse
Meta committing to ActivityPub. Threads posts federate to Mastodon eventually. First mainstream Fediverse-compatible service.
Launched in 5 days
Engineering lore: prototype in weeks, launched July 5 2023, 100M users in 5 days. Reusing infrastructure = time-to-market win.