CARBON SELF-HOSTED • ·····   ENTER →

CARBON  •  A DATABASE OF YOUR OWN

Carbon is a spreadsheet database that runs on a real machine, not a rented cloud. No plans, no seats, no silent sync. Every table is real PostgreSQL, and the data is yours to query, export, and take anywhere.

UNDER THE SURFACE

Structure forms under pressure.

Every table you create becomes a real PostgreSQL table, with real typed columns. Filters are SQL. Sorts are SQL. Nothing is faked in an app layer.

The grid takes shape.

  • REAL POSTGRESQL TABLES.
  • CSV, JSON, AND EXCEL IN AND OUT.
  • LINKED RECORDS, LOOKUPS, ROLLUPS.
  • RUNS ON YOUR OWN IRON.
↑↓←→ MOVEENTER EDIT TAB COMMITCTRL+Z UNDO
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IN PLACE

A list you typed in ninety seconds is still the fastest way to think. Every other database makes you name the columns before it will let you type a word, so the thinking waits on the paperwork.

Carbon takes the mess. When the shape finally shows up, the list hardens where it sits, inside the note you were already writing. One thing that changed state, never a copy in a second place.

SELECTPROMOTE TYPES GUESSED, NOT ASSUMEDNOTHING ELSE MOVES
Kitchen rebuild NOTE

Contractor is back on the 18th. Anything still unticked by then is money I spend twice.

KITCHEN REBUILD • 4 ROWS FROM THIS NOTE
done
task
due
cost
- [ ] Replace the hood vent, 2026-08-14, 220 Replace the hood vent2026-08-14220
- [x] Measure the alcove, 2026-07-30, 0 Measure the alcove2026-07-300
- [ ] Pick the tile, 2026-08-22, 480 Pick the tile2026-08-22480
- [ ] Book the electrician, 2026-09-02, 600 Book the electrician2026-09-02600

Four columns, four rows. Every type is a guess: click one to change it.

Everything around it stayed exactly where it was.

Click the list

THE SQL

Most tools hide your data behind an interface and hope you never ask what's underneath. Carbon shows you. Every table you click into existence is a real CREATE TABLE, every field a typed column, readable by anything that speaks SQL.

There is no proprietary format holding you hostage. Look under the hood any time. It's your engine.

THE PULSE

The crystal in the corner of every page is not a logo. It spins with your server's heartbeat and freezes the moment the connection drops. No status page, no support ticket, no waiting for a vendor to admit something broke. You always know, without reading a word.

LATENCY 41MS • STATE ALIVE
SPIN SPEED = SERVER HEALTH

IMPORT & EXPORT

The business model for big platforms is that it makes arriving easy and leaving painful. Drop in a spreadsheet, and a table forms around it. Ask for your data back, and it leaves whole in widely used formats: CSV, XLSX, and JSON.

You stay because it's good, not because you're stuck.

SELF-HOSTED

Untouched by anyone's cloud.

Leave the cloud.
Keep everything.

Carbon is in active build, and access is by invitation. If someone you know sent you, ask for a seat.