← /daily-startup-idea
June 27, 2026

Gossip

“A gossip protocol for your friend group. Every spicy detail gets epidemic-broadcast in O(log n) hops. Anti-entropy runs at brunch. Eventually consistent within 36 hours — sooner if Sarah’s involved. CAP theorem says you can’t have privacy, peace of mind, and your sister-in-law all at once.”

The Problem

Right now, when your cousin gets engaged, she has to manually fan out the news to 34 group chats with overlapping members and inconsistent emoji conventions. The system is serializable. Latency is weeks. Aunt Linda finds out from Instagram, learns about it third, and never recovers. Meanwhile thebadnews — the breakup, the firing, the haircut — somehow reaches everyone in 11 minutes through channels nobody can audit.

The Solution

Gossip enrolls all your contacts as nodes in an epidemic protocol. You whisper an update to 3 peers. Each of them whispers to 3 more on a 17-minute round. Within four rounds, your entire two-hop social graph has converged. Anti-entropy reconciles conflicts at brunch (“wait, I heard it was Tahoe”). Tombstones expire on a 90-day TTL so nobody has to keep gossiping about your divorce forever.

GOSSIP · epidemic dissemination · fanout=3
payload: “they’re engaged”
t = 0
1/81
you
t = 17m
4/81
+ 3 peers
t = 34m
13/81
their peers
t = 68m
81/81
convergence
O(log n) hopsn = 81 nodesconverged in 68m
aunt linda: notified at t+41mshe still calls to ask anyway

Live Feed

What’s currently propagating through your network. Read receipts and version vectors elided to protect the guilty.

payload
status
saturation
megan & dev are engaged
CONVERGED
100%
tyler got laid off (again)
PROPAGATING
62%
the wedding is in Tahoe (unconfirmed)
CONFLICT
—
you bought a peloton
QUARANTINED
0%
ella’s parents are getting divorced
EMBARGOED
9%
marcus quit his job to make pottery
STALE (90d TTL)
expired

Consistency Models

Pick the strongest guarantee your nervous system can afford.

EVENTUAL
everyone knows, eventuallyDefault. Truth converges by Sunday. Aunt Linda still calls.
CAUSAL
engagement → wedding → babyPreserves narrative order. Prevents the ‘wait, they’re married?’ class of bug.
READ-YOUR-WRITES
you hear your own news firstPrevents finding out from a tagged photo. Worth the premium.
LINEARIZABLE
global order, no overlapRequires a coordinator (your mother). Latency: 4–6 weeks.

Pricing

Hobby
personal
$7 / mo
Up to 50 nodes. Fanout of 3. Anti-entropy at one (1) brunch per week. Tombstones default to 30d so the breakup actually goes away.
Drama
most popular
$19 / mo
Includes read-your-writes, conflict resolution by group vote, and a CRDT for who actually said what at the wedding.
Dynasty
enterprise
$59 / mo
Up to 4 generations. Causal consistency across in-laws. Compliance mode redacts your finances from the propagation layer. Mostly.

TAM

Pieces of gossip in flight globally at any given moment
8.1B humans × 4.2 active rumors × 0.7 embellishment factor
= 23.8B simultaneous payloads
Of which an estimated 14B are about Megan.

The Ask

$5M seed. Builds the anti-entropy daemon, the conflict-resolution brunch scheduler, and a tombstone manager that actuallylets your most embarrassing year of college expire. Two engineers, one cultural anthropologist, and a lawyer on retainer for whatever Sarah does in week three.

Series A pitch:“We’re Cassandra for the things your mother is going to find out anyway.”