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

# Quantstamp (QSP): how it works, supply and reviews

## In short

- **Type**: QSP is an ERC-20 token on Ethereum with 18 decimals.
- **Maximum supply**: The token contract states that QSP has a fixed supply.
- **Risks and caveats**: The token contract is owned (Ownable) and was written so that transfers stayed locked until the owner enabled them.
- **Checked**: 1 November 2026

## Key facts

- **Ticker**: QSP
- **Official site**: [quantstamp.com](https://quantstamp.com/)

Key facts checked on 1 November 2026 against official sources.

## What is Quantstamp

Quantstamp is a blockchain security company that has run smart contract audits and other web3 security services since 2017. Its ERC-20 token QSP was created for the Quantstamp Security Network, a decentralized smart contract scanning service on Ethereum.

## Network and consensus

| Parameter | Details |
|---|---|
| Type | QSP is an ERC-20 token on Ethereum with 18 decimals. |
| Runs on | The Quantstamp Security Network V2 ran decentralized scans and stored reports on the Ethereum blockchain (June 2019 announcement). |
| Open source | Quantstamp made the Security Network code open source in June 2019. |

## Supply and issuance

| Parameter | Details |
|---|---|
| Maximum supply | The token contract states that QSP has a fixed supply. |
| Burnable | The token contract is burnable (it inherits BurnableToken). |

## What QSP is used for

- QSP was designed to pay for decentralized smart contract scans on the Quantstamp Security Network.
- Node operators could run the network without being whitelisted by Quantstamp (V2, June 2019).

## Who develops and governs Quantstamp

- **Company**: The website terms are an agreement with Quantstamp, Inc.
- **Headquarters**: The contact address in the terms is in Dover, Delaware, USA.
- **Founders**: Richard Ma is listed as CEO and Founder; a 2019 post calls him co-founder and CEO of Quantstamp Inc.
- **Investors**: In February 2019 Quantstamp announced investment from Nomura Holdings and Digital Garage and set up Quantstamp Japan GK.
- **Open source**: Quantstamp publishes research tools on GitHub, for example a Halo2 circuit analyzer and an ERC-4337 checker.

## History

| Date | Event |
|---|---|
| 2017 | Quantstamp starts its blockchain security work. |
| 27 February 2019 | Quantstamp announces Quantstamp Japan GK after investment from Nomura Holdings and Digital Garage. |
| 20 June 2019 | The Quantstamp Security Network V2 goes live on Ethereum mainnet and its code is open-sourced. |
| 19 October 2023 | Quantstamp announces DeFi Protection, a product that reimburses customers for losses from a gap in its security services. |

## Security and audits

- Quantstamp lists two Ethereum 2.0 clients, Prysm and Teku, among the systems it has secured.
- Public Quantstamp audit reports can be checked at certificate.quantstamp.com.
- Quantstamp's blog publishes monthly round-ups of crypto security incidents.

## Security incidents

No security incident is recorded in the sources checked on 1 November 2026 (the company’s own channels and incident databases): [defillama.com/hacks](https://defillama.com/hacks), [hacked.slowmist.io](https://hacked.slowmist.io/), [rekt.news/leaderboard](https://rekt.news/leaderboard/), [quantstamp.com/blog](https://quantstamp.com/blog)

## Official QSP contracts

| Network | Contract address |
|---|---|
| Ethereum | [0x99ea4db9ee77acd40b119bd1dc4e33e1c070b80d](https://etherscan.io/token/0x99ea4db9ee77acd40b119bd1dc4e33e1c070b80d) |

QSP is an ERC-20 token on Ethereum. The contract source names Quantstamp Technologies Inc.

## Risks and caveats

- The token contract is owned (Ownable) and was written so that transfers stayed locked until the owner enabled them.
- Quantstamp's current site describes audit and security services; it does not describe a current use for the QSP token.

## Official links

- Website: [quantstamp.com](https://quantstamp.com/)
- Blog: [quantstamp.com/blog](https://quantstamp.com/blog)
- Audit reports: [quantstamp.com/audits](https://quantstamp.com/audits)
- Source code: [github.com/quantstamp](https://github.com/quantstamp)
- Block explorer: [etherscan.io/token/0x99ea4db9ee77acd40b119bd1dc4e33e1c070b80d](https://etherscan.io/token/0x99ea4db9ee77acd40b119bd1dc4e33e1c070b80d)

## Questions and answers

**What is Quantstamp?**

A blockchain security company, active since 2017, that runs smart contract audits and other web3 security services.

**Who founded Quantstamp?**

Quantstamp's team page lists Richard Ma as CEO and Founder; a 2019 Quantstamp post calls him co-founder and CEO of Quantstamp Inc.

**What is the QSP token?**

An ERC-20 token on Ethereum with a fixed supply, created for paying for decentralized scans on the Quantstamp Security Network.

**What is the supply of QSP?**

Etherscan showed a max total supply of about 976,442,388 QSP on 1 November 2026.

## Sources

- [Quantstamp - Home](https://quantstamp.com/)
- [Quantstamp - Team](https://quantstamp.com/team)
- [Quantstamp - Terms of Use](https://quantstamp.com/legal/terms)
- [Quantstamp - Audits](https://quantstamp.com/audits)
- [Quantstamp - Blog](https://quantstamp.com/blog)
- [Quantstamp - The Quantstamp Security Network V2 is Now Live on Ethereum Mainnet](https://quantstamp.com/blog/the-quantstamp-security-network-v2-is-now-live-on-ethereum-mainnet)
- [Quantstamp - Quantstamp Expands to Japan with Investment from Nomura Holdings and Digital Garage](https://quantstamp.com/blog/quantstamp-expands-to-japan-with-investment-from-nomura-holdings-and-digital-garage)
- [Quantstamp - DeFi Protection: Compensating Users For DeFi Losses](https://quantstamp.com/blog/defi-protection-compensating-users-for-defi-losses)
- [GitHub - quantstamp](https://github.com/quantstamp)
- [Etherscan - Quantstamp (QSP) token](https://etherscan.io/token/0x99ea4db9ee77acd40b119bd1dc4e33e1c070b80d)

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Page updated: 2026-11-01

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