# Chromia: the relational blockchain. The database nobody can fake.

> Chromia is a relational blockchain: apps and AI agents keep data in real tables, query it like SQL, and anyone can check every record. Users pay no gas.

Source: https://chromia.com/

## Live demo: query the chain
The home page runs read-only Rell queries on Chromia mainnet and shows the node's own answer (pick a chain, e.g. directory_chain get_summary(), economy_chain get_price_oracle_rates(), my_neighbor_alice assets.get_account_count()). Comparison with Ethereum and Solana: https://chromia.com/compare/

Relational blockchain · mainnet since July 2024

# The database *nobody can fake.*

For developers building apps and AI agents: **real tables and SQL-like queries** on a public chain. Anyone can check every record. Nobody can rewrite one.

[Start building](https://chromia.com/developers/#start)[How it works ↓](#plain)

**chromia=#** SELECT chain, height, block, txs FROM mainnet.blocks ORDER BY time DESC;

|  | chain | height | block | txs | status |
| --- | --- | --- | --- | --- | --- |
| 1 | system\_anchoring | 31,705,522 | 61f5a7…5d1d | 1 | ✓ final |
| 2 | cluster\_anchoring\_pink | 31,812,527 | 84a1f6…0e12 | 1 | ✓ final |
| 3 | economy\_chain | 23,674,625 | bbeba9…2bc3 | 1 | ✓ final |
| 4 | token\_chain | 1,550,186 | 122871…ab0f | 1 | ✓ final |
| 5 | my\_neighbor\_alice | 14,651,522 | 4bd0cb…7c64 | 1 | ✓ final |
| 6 | directory\_chain | 2,420,487 | 74e34e…287e | 1 | ✓ final |

6 rows · snapshot 1 Nov 2026[44 chains · 35 nodes · 19 providers · 11 countries →](https://chromia.com/network/)

## Choose your path

[For developers 01

### Build an app

Tables and SQL-like queries in one language, Rell. Runs on your laptop.

Start building **→**](https://chromia.com/developers/#start)
[For everyone 02

### Use the apps

Games, AI agents and payments, live now. Users pay no gas fees.

See the apps **→**](https://chromia.com/ecosystem/)
[For CHR holders 03

### Hold & stake CHR

Stake in Chromia Vault: 3% a year plus a share of fees (Oct 2026).

Buy & stake CHR **→**](https://chromia.com/token/)

In plain words

## A shared database. Every row signed.

STEP 01

### An app writes a row

A game item, payment or agent decision.

STEP 02

### The network signs it

Companies that run nodes agree within one to two seconds.

4 of 5 signed (over 2/3): final.

STEP 03

### Anyone can check it

Past records can’t be rewritten. Every change is a new signed record.

**220M+**transactions *latest public count, Apr 2026*

**1M+**accounts *latest public count, Apr 2026*

**≈2 s**per block when busy, final on commit *no reorgs*

**150K+**monthly active users *chromia.com, Jan 2026*

[Where each number comes from →](https://chromia.com/sources/)

Built for AI agents

## Every agent action, signed and checkable.

[See use cases →](https://chromia.com/use-cases/)

Audit trails

### Every decision, signed

An agent writes each action as a row. Anyone can check it later.

Agent accounts

### Agents that hold funds

Agents get on-chain accounts and move tokens. Each transfer is a signed record.

Guardrails

### Rules before actions

Check each action against set rules before it runs, and keep every verdict as a signed record.

agent\_log.rell · example

```
entity decision {
  agent: text;
  action: text;
  verdict: text;
}

operation log_decision(
  agent: text,
  action: text,
  verdict: text
) {
  create decision(
    agent, action, verdict
  );
}

// read it back like SQL
query decisions_by(agent: text) =
  decision @* { .agent == agent };
```

Why Chromia

## Why not just a database?

A regular databaseA typical blockchainChromia

Tables and SQL-like queriesDatabaseYesBlockchainNo, key-value storageChromiaYes, in Rell

Records nobody can quietly editDatabaseNo, the owner canBlockchainYesChromiaYes

Anyone can check the dataDatabaseNoBlockchainYesChromiaYes

No fees for usersDatabaseYesBlockchainNo, users pay gasChromiaYes, the app pays hosting

For developers

## Hello world, locally.

[First, install chr (Docker or Homebrew) →](https://chromia.com/developers/#start)

terminal

```
chr create-rell-dapp
cd my-rell-dapp
# local node: localhost:7740
chr node start
# in a second terminal
chr query hello_world  # "Hello World!"
```

[Free course**Your first Rell app**26 lessons →](https://chromia.com/learn/book-review/introduction/)[Developers**Deploy, cost, AI tools**Developer page →](https://chromia.com/developers/)

## Build your first app on Chromia.

[Start building](https://chromia.com/developers/#start)[Buy & stake CHR](https://chromia.com/token/#get)