[Crypto projects](https://revain.org/projects/) › Immutable

# Immutable (IMX): how it works, supply and reviews

## In short

- **Type**: Gaming chain built on Ethereum from a geth fork; Immutable calls it a layer-2 blockchain purpose-built for games
- **Maximum supply**: 2,000,000,000 IMX
- **Risks and caveats**: Immutable Chain runs Clique proof-of-authority consensus, and its Ethereum bridge relies on Axelar messaging rather than ZK proofs today.
- **Checked**: 31 October 2026

## Key facts

- **Ticker**: IMX
- **Official site**: [immutable.com](https://www.immutable.com/)

Key facts checked on 31 October 2026 against official sources.

## What is Immutable

Immutable is a gaming technology company whose Immutable Chain (Immutable zkEVM) is an EVM-compatible chain built for games on Ethereum. IMX, issued by the IMX token foundation, is the chain's gas token and can be staked; Immutable's earlier StarkEx rollup, Immutable X, was merged into Immutable Chain in early 2026.

## Network and consensus

| Parameter | Details |
|---|---|
| Type | Gaming chain built on Ethereum from a geth fork; Immutable calls it a layer-2 blockchain purpose-built for games |
| Consensus | Node software reports Clique proof-of-authority consensus |
| Chain ID | Immutable zkEVM mainnet chain ID 13371; gas token IMX |
| Block time | About 2 seconds, with finality in about 2 seconds |
| Smart contracts | Geth fork aligned with Ethereum's Cancun fork; Solidity up to 0.8.28; blob transactions not supported |
| Bridge | The canonical Ethereum bridge uses Axelar for cross-chain messaging; ZK proofs are planned |

## Supply and issuance

| Parameter | Details |
|---|---|
| Maximum supply | 2,000,000,000 IMX |
| Initial distribution | Ecosystem development 51.72%, project development 25%, private sale 13.86%, public sale 5.42%, foundation reserve 4% |
| Fee mechanism | 20% of the protocol fee on each Immutable transaction is paid in IMX and reserved for staking rewards |

## What IMX is used for

- Gas on Immutable Chain
- Staking, provided by the IMX token foundation
- Governance votes on ecosystem proposals via Snapshot
- Part of protocol fees is paid in IMX

## Who develops and governs Immutable

- **Developer**: Immutable Pty. Ltd. is the exclusive technology service provider; it also develops Gods Unchained and Guild of Guardians
- **Foundation**: IMX is issued by a foundation: Digital Worlds Ltd. NFTS (British Virgin Islands) in the 2023 whitepaper, the IMX Ecosystem Foundation in current docs
- **Governance**: IMX holders vote on token-related proposals; the foundation curates which proposals go to a vote
- **Open source**: The Immutable geth fork, bridge contracts and migration contracts are published on GitHub

## History

| Date | Event |
|---|---|
| 2018 | Immutable raises a seed round, followed by a USD 15 million Series A in September 2019. |
| 7 March 2024 | IMX liquidity rewards start on the newly launched Immutable zkEVM chain. |
| 2026 | Immutable X, the StarkEx-based rollup, is merged into Immutable Chain; its assets migrate through a bridge upgrade. |

## Security and audits

- The bridge has flow-rate limits: large withdrawals are queued for 24 hours and bursts above capacity are held for manual review.
- Bridge contracts and the Immutable X migration contracts have published audit reports (migration audited by Nethermind).

## Security incidents

| Date | What happened | Source |
|---|---|---|
| 21 September 2024 | Hack: Immutable says a Discord incident began at 4:05 PM UTC on 21 September 2024 and that an employee posted in its Discord within two hours with the issue contained. Funds returned: not stated | [x.com](https://x.com/Immutable/status/1838169450387996865) |

## Official IMX contracts

| Network | Contract address |
|---|---|
| Ethereum | [0xf57e7e7c23978c3caec3c3548e3d615c346e79ff](https://etherscan.io/token/0xf57e7e7c23978c3caec3c3548e3d615c346e79ff) |
| Immutable Chain (wIMX) | [0x3a0c2ba54d6cbd3121f01b96dfd20e99d1696c9d](https://explorer.immutable.com/address/0x3a0c2ba54d6cbd3121f01b96dfd20e99d1696c9d) |

IMX is native on Immutable Chain and an ERC-20 on Ethereum; wIMX is the wrapped ERC-20 on Immutable Chain.

## Risks and caveats

- Immutable Chain runs Clique proof-of-authority consensus, and its Ethereum bridge relies on Axelar messaging rather than ZK proofs today.
- Immutable X is deprecated: its sequencer no longer processes new transactions and remaining interfaces will be removed.
- Immutable's main website now leads with an AI growth platform for games; the chain is an opt-in product.

## Official links

- Website: [www.immutable.com](https://www.immutable.com/)
- Docs: [docs.immutable.com](https://docs.immutable.com/)
- Block explorer: [explorer.immutable.com](https://explorer.immutable.com/)
- Token site: [imx.community](https://imx.community/)
- Source code: [github.com/immutable](https://github.com/immutable)

## Questions and answers

**What is Immutable?**

Immutable is a gaming technology company; its Immutable Chain (Immutable zkEVM) is an EVM-compatible chain for games with IMX as gas.

**What is the maximum supply of IMX?**

2,000,000,000 IMX, according to the 2023 Immutable whitepaper.

**What happened to Immutable X?**

Immutable X, the StarkEx-based rollup, was merged into Immutable Chain in early 2026 and its assets were migrated.

**What is IMX used for?**

IMX pays gas on Immutable Chain, can be staked, and is used to vote on ecosystem proposals.

**How is Immutable Chain secured?**

Its nodes run Clique proof-of-authority consensus, and the Ethereum bridge uses Axelar messaging with flow-rate limits.

## Sources

- [Immutable — Home](https://www.immutable.com/)
- [Immutable — Chain](https://www.immutable.com/chain)
- [Immutable Docs — Immutable Chain overview](https://docs.immutable.com/docs/products/immutable-chain/overview.md)
- [Immutable Docs — Native token](https://docs.immutable.com/docs/products/immutable-chain/native-token.md)
- [Immutable Docs — Immutable X deprecation](https://docs.immutable.com/docs/products/immutable-chain/immutable-x-deprecation.md)
- [Immutable Docs — Differences from Ethereum](https://docs.immutable.com/docs/products/immutable-chain/differences-from-ethereum.md)
- [Immutable Docs — Bridging](https://docs.immutable.com/docs/products/immutable-chain/bridging.md)
- [Immutable Docs — Running nodes](https://docs.immutable.com/docs/products/immutable-chain/running-nodes.md)
- [IMX token site — Overview](https://imx.community/)
- [IMX token site — Tokenomics](https://imx.community/tokenomics)
- [Immutable Whitepaper Update 2023 (PDF)](https://cdn.prod.website-files.com/646557ee455c3e16e4a9bcb3/6499367de527dd82ab7475a3_Immutable%20Whitepaper%20Update%202023%20(3).pdf)

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Page updated: 2026-10-31

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Source: https://revain.org/projects/immutable/