Enreef Earth

Run the real world forward.

Enreef Earth turns real geography, population, housing, businesses, transit, infrastructure, and institutions into one living world. Fork a place, change it, run time forward, and follow the consequences through the systems and people inside it.

San Francisco

Ask questions reality won't let you test.

What changes if thousands of homes are added in one neighborhood?
How do nearby travel, retail demand, rents, transit use, and household moves change together?
What happens when commuter or visitor demand drops for a month?
What happens when a major street closes for three days?
How does a port, airport, transit, or utility disruption move through the city?
What changes when transit frequency doubles or a new station opens?

Keep the baseline. Create a branch. Change the world. Then compare what moved, where it moved, and the chain of events behind the difference.

Inside Enreef Earth

World Explorer

Open the living baseline and inspect households, businesses, buildings, streets, transit, institutions, and the systems connecting them.

Branch Lab

Fork a place, change housing, transit, streets, demand, or policy, run time forward, and compare the branches side by side.

History Replay

Recreate known past conditions, run them forward, and compare the world with observed history.

Entity Trace

Move from a citywide change down to the households, businesses, routes, institutions, and events that produced it.

Reference world

San Francisco, compiled.

Enreef assembles geography, buildings, households, jobs, transit, roads, land use, and observed conditions into a versioned world. Every source remains traceable back to its snapshot and build input.

Census ACS / PUMS — households and population distributions
Census TIGER/Line — geography
LEHD / LODES — jobs and workplace distributions
Overture Maps — buildings, places, transportation, addresses
OpenStreetMap — routing network and enrichment
DataSF — parcels, land use, zoning, height and bulk
SFMTA GTFS — transit service
Caltrans PeMS — traffic observations

Where it matters first

Decisions with connected consequences.

Development & real estate

See how a project can reshape access, movement, neighborhood activity, housing pressure, and nearby demand.

Planning & mobility

Compare changes to transit, streets, land use, closures, and infrastructure inside one connected world.

Campuses & districts

Run bounded places with clearer ownership, operational data, repeated decisions, and measurable outcomes.

Bring us a real scenario →

Enreef Earth

Every real-world future earns its credibility.

A convincing outcome is not evidence. Enreef keeps the sources, assumptions, versions, branches, and history behind every Earth run inspectable — and uses historical replay to measure where a model holds up and where it does not.

Sources: Every Earth world records the data, licenses, snapshot dates, and build inputs behind it.
Historical replay: Run known past conditions and compare the resulting world with what actually happened.
Calibration: Models are measured against observed data, holdouts, and simpler baselines instead of trusted by appearance.
Uncertainty: A branch is not presented as the one inevitable future. Assumptions and uncertainty stay visible.

Enreef Worlds

Created worlds answer to a different standard: their authored rules, continuity, relationships, resources, and history must remain coherent over time.

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