Vendor
softstack
Flensburg Web3 company offering smart contract audits, pentests, development and compliance
About
softstack is a Web3 security, development and consulting company operated by softstack GmbH, registered at the Flensburg local court and based at Schiffbrückstraße 8 in Flensburg, Germany. The company states that it is headquartered and operates fully in Germany with a team of full-time employees, and that it mostly works on fixed-price projects. Its security offer includes smart contract audits, digital asset assessments, penetration testing, threat-led penetration testing, dApp audits and preparation for MiCA, DORA and VARA compliance. The audit service combines automated vulnerability testing, manual line-by-line code review, business logic and economic attack analysis, fuzzing and edge case evaluation, a final report with a developer debrief and one free re-audit after fixes. On the development side, softstack builds custom software, mobile apps, dApps and smart contracts, and it also provides project management, software development consulting, Web3 regulation consulting and ISMS consulting. It lists supported ecosystems including Ethereum, Arbitrum, Optimism, Base, Polygon, BNB Chain, Avalanche, Solana, Sui, Aptos, TON, NEAR, Polkadot and Tezos, and its tooling includes Solidity, Rust, TypeScript and Hardhat. Case studies cover tokenised securities, stablecoins and DeFi protocols.
At a glance
- Operated by softstack GmbH, Flensburg, Germany
- Audit includes fuzzing, economic attack analysis and a free re-audit
- Sells penetration testing, including threat-led testing
- Also develops dApps, smart contracts and mobile apps
- MiCA, DORA and VARA compliance support
- Publishes audit reports in a public GitHub repository
- Services
- Development
- Audit
- Penetration testing
- Languages
- Solidity, Rust
- Headquarters
- Germany
- Public audit reports
- github.com(opens in a new tab)
softstack: frequently asked questions
- What services does softstack offer?
- According to its public information, softstack offers: Development, Audit, and Penetration testing.
- Which blockchains does softstack work with?
- softstack works with Ethereum, Arbitrum, Optimism, Base, Polygon, BNB Chain, Avalanche, Solana, Sui, Aptos, TON, NEAR, and Polkadot.
- Which smart contract languages does softstack use?
- softstack works with Solidity and Rust.
- Where is softstack based?
- softstack is headquartered in Germany.
- Is softstack verified on smart-contract.com?
- Not yet. This listing was compiled from public information and softstack has not claimed it or gone through the vetting process of smart-contract.com.
- How can I get a quote from softstack?
- Describe your project once on smart-contract.com: you receive comparable quotes from vendors that match it, in the same format. Development and audit are always entrusted to two independent companies.
Where this information comes from
This listing was compiled from the public pages below and last reviewed on September 24, 2026. The company has not claimed it yet, is not a partner of smart-contract.com and has not been vetted.
- https://softstack.io/
- https://softstack.io/legal-notice
- https://softstack.io/blockchain-security/services/smart-contract-audit
- https://softstack.io/blockchain-ecosystems
- https://softstack.io/programming-languages
- https://github.com/softstack/Smart-Contract-Security-Audits
- https://softstack.io/blockchain-development/services/smart-contract-development
- https://softstack.io/references
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