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
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Key facts
- Ticker
- QSP
- Official site
- 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, hacked.slowmist.io, rekt.news/leaderboard, quantstamp.com/blog
Official QSP contracts
| Network | Contract address |
|---|---|
| Ethereum | 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
- Blog: quantstamp.com/blog
- Audit reports: quantstamp.com/audits
- Source code: github.com/quantstamp
- Block explorer: 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
- Quantstamp - Team
- Quantstamp - Terms of Use
- Quantstamp - Audits
- Quantstamp - Blog
- Quantstamp - The Quantstamp Security Network V2 is Now Live on Ethereum Mainnet
- Quantstamp - Quantstamp Expands to Japan with Investment from Nomura Holdings and Digital Garage
- Quantstamp - DeFi Protection: Compensating Users For DeFi Losses
- GitHub - quantstamp
- Etherscan - Quantstamp (QSP) token
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