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Germanys Leading Web3 Experts

Softstack is a Germany-based Web3 software development and cybersecurity company specializing in blockchain infrastructure, smart contract audits, and production-grade software systems. Founded in 2017 (formerly Chainsulting), Softstack has completed 1,500+ smart contract audits with a zero-exploit track record and supports clients from early-stage startups to institutional players.

The company operates across major ecosystems including EVM, SVM, CosmosSDK, Substrate, and Layer 2s, and delivers services ranging from security audits and penetration testing to full-stack software development and infrastructure operations. As an ISO 27001–certified provider, Softstack combines deep technical expertise with enterprise-grade security standards.

Softstack is trusted by leading organizations such as Ripple, TON, Tezos, BitGo, Fetch.ai, Bitcoin.com, and Anchorage Digital, and focuses on building secure, scalable systems that are ready for real-world adoption.

Certifications/Compliance

ISO 9001:2015
ISO 27001
CMMI Level 2
CMMI Level 3
CMMI Level 4
CMMI Level 5
Great Place To Work

Partner Programs

AWS Partner
Google Partner
Shopify Partner
Meta Business Partner
Germany Germany
Schiffbrueckstrasse 8, Flensburg, Schleswig-Holstein 24937
$100 - $149/hr
10 - 49
2017

Service Focus

Focus of Blockchain Development
  • Smart Contract Development - 20%
  • Private Blockchain Development - 10%
  • Ethereum - 20%
  • Hyperledger - 10%
  • ICO Consulting - 20%
  • Cryptocurrency Exchange - 10%
  • Wallet Development - 10%
Focus of Software Development
  • Java - 10%
  • PHP - 10%
  • Javascript - 10%
  • AngularJS - 10%
  • C# - 10%
  • Python - 10%
  • Node.js - 10%
  • ReactJS - 30%
Focus of IT Services
  • Cyber Security - 40%
  • Network & System Administration - 40%
  • IT Consulting - 20%

Industry Focus

  • Enterprise - 20%
  • Startups - 10%
  • Banking - 10%
  • Advertising & Marketing - 5%
  • Business Services - 5%
  • Financial & Payments - 5%
  • Gaming - 5%
  • Government - 5%
  • Healthcare & Medical - 5%
  • Telecommunication - 5%
  • Manufacturing - 5%
  • Real Estate - 5%
  • Retail - 5%
  • Insurance - 5%
  • Industrial - 5%

Client Focus

50% Small Business
40% Medium Business
10% Large Business

Review Analytics of softstack

6
Total Reviews
5.0/5
Overall Rating
5
Recent Reviews

What Users Say

Professional and with great expertise always on time
Stefan Klein
Stefan Klein , Account Manager at neuroTree at neuroTree
Working with Softstack was smooth and professional from start to finish, giving us strong confidence
Sindre H
Sindre H
Professional, flexible, efficient, no nonsense approach
Thomas K
Thomas K , CPO at TMRW
Top Tier Web3 Security Auditor
Eric Downes
Eric Downes
We used Softstack for a smart contract audit. I value their expertise and clear communication.
Product Owner at Yumo

What Users Like The Most

  • Quick onboarding Fast turnaround Very detailed report
  • Professional, precise, fast, and easy to work with.
  • Professional, flexible, efficient, no nonsense approach, knowledgeable

What Users Like The Least

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Detailed Reviews of softstack

5.0 6 Reviews
  • All Services
  • Blockchain Development
  • Software Development
  • IT Services
  • Relevance
  • Most Recent
  • Rating: high to low
  • Rating: low to high
Write a Review
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Stefan Klein
Stefan Klein, Account Manager at neuroTree
Posted 1 month ago

Professional and with great expertise always on time

Softstack's engagement was very professional and we always felt treated as a valuable customer. Yannik and his team have great expertise and delivered as agreed

What was the project name that you have worked with softstack?

Secure blockchain vaults for patient-controlled neurodata

What service was provided as part of the project?

Blockchain Development

Describe your project in brief

NeuroVault is a blockchain-powered platform designed to transform how neuroTree, a leading telehealth provider for mental and neurological conditions, handles patient data. By integrating decentralized ledger technology, NeuroVault creates patient-controlled digital vaults that ensure HIPAA/GDPR-compliant sharing of sensitive records like therapy notes, PTSD assessments, and neuroimaging results. Patients use simple wallet apps to grant or revoke access instantly, eliminating outdated faxing and manual consents that plague traditional EHR systems. This addresses core pain points in telehealth: data silos across providers, breach risks, and administrative burdens costing clinics 70% of clinician time

What is it about the company that you appreciate the most?

expertise, professionalism

Rating Breakdown

  • Quality
  • Schedule & Timing
  • Communication
  • Overall Rating

Project Detail

  • $10001 to $50000
  • Completed
  • Healthcare & Medical
Verified via email/call
Thomas K
Thomas K, CPO at TMRW
Posted 3 months ago

Professional, flexible, efficient, no nonsense approach

We used Softstack for blockchain integration, enhancing transparency and adding verifiable information into our supply chain, which builds trust and improves operations. Professional, flexible, efficient, no nonsense approach

What was the project name that you have worked with softstack?

TON

What service was provided as part of the project?

Software Development, Blockchain Development

Describe your project in brief

We engaged Softstack to perform a security assessment of our new multi purpose token standard. Softstack reviewed the architecture and implementation for security, efficiency and adherence to best practices. All findings came with clear and practical recommendations. Communication was smooth, the report was delivered on time and gave our team strong confidence in going live. We would recommend Softstack to any project that needs an independent review of complex token or ledger functionality.

What is it about the company that you appreciate the most?

Professional, flexible, efficient, no nonsense approach, knowledgeable

What was it about the company that you didn't like which they should do better?

/

Rating Breakdown

  • Quality
  • Schedule & Timing
  • Communication
  • Overall Rating

Project Detail

  • $10001 to $50000
  • Completed
  • Information Technology
Verified via email/call
Sindre H
Sindre H
Posted 3 months ago

Working with Softstack was smooth and professional from start to finish, giving us strong confidence

Our overall experience with Softstack has been very positive. The team is professional, easy to work with and technically strong, and their report gave us clear, actionable insights and real confidence to move forward with our launch.

What was the project name that you have worked with softstack?

Security review of our new token standard

What service was provided as part of the project?

Blockchain Development

Describe your project in brief

We engaged Softstack to perform a security assessment of our new multi purpose token standard. Their team reviewed the architecture and implementation for security, efficiency and adherence to best practices. No critical, high or medium issues were found, and the few low level findings came with clear and practical recommendations. Communication was smooth, the report was delivered on time and gave our team strong confidence in going live. We would recommend Softstack to any project that needs an independent review of complex token or ledger functionality.

What is it about the company that you appreciate the most?

Professional, precise, fast, and easy to work with.

What was it about the company that you didn't like which they should do better?

/

Rating Breakdown

  • Quality
  • Schedule & Timing
  • Communication
  • Overall Rating

Project Detail

  • $10001 to $50000
  • Completed
  • Financial & Payments
Verified via email/call
Product Owner at Yumo
Posted 3 months ago

We used Softstack for a smart contract audit. I value their expertise and clear communication.

I appreciate that Softstack has a zero exploit record, which is quite rare and impressive in our industry. Their quick response times and personal approach made a significant difference; they treated us with great customer care rather than just another client. This white-glove service coupled with their high level of expertise and clear, concise reports have proven invaluable to us. Their professionalism and outstanding reputation in the industry further reassure me of their quality, making me eager to continue working with them and recommend them to others. Softstack’s services offer necessary security audits that are vital for launching our platform securely and safely, ensuring trust from users and partners. They have helped make what is essential for user safety, organizational safety, and peace of mind an achievable goal. Their expertise is critical for us to confidently scale our operations.

What was the project name that you have worked with softstack?

Yumo

What service was provided as part of the project?

IT Services, Blockchain Development

Describe your project in brief

Perps Dex on Solana

What is it about the company that you appreciate the most?

- Expertise - Professionalism - Punctuality - Friendly, personal approach

What was it about the company that you didn't like which they should do better?

/

Rating Breakdown

  • Quality
  • Schedule & Timing
  • Communication
  • Overall Rating

Project Detail

  • $10001 to $50000
  • In Progress
  • Information Technology
Verified via email/call
Eric Downes
Eric Downes
Posted 3 months ago

Top Tier Web3 Security Auditor

Softstack delivered multiple audits on our Token Core Protocol and Staking Emissions with a level of rigor and collaboration that exceeded expectations. Findings were precise, impact focused, and paired with clear remediation guidance. The team was responsive, thorough in retesting, and proactive about hardening our upgrade and treasury controls. We shipped with confidence.

What was the project name that you have worked with softstack?

Buddy Green

What service was provided as part of the project?

IT Services, Blockchain Development

Describe your project in brief

DeFi Protocol

What is it about the company that you appreciate the most?

Quick onboarding Fast turnaround Very detailed report

What was it about the company that you didn't like which they should do better?

/

Rating Breakdown

  • Quality
  • Schedule & Timing
  • Communication
  • Overall Rating

Project Detail

  • $10001 to $50000
  • Completed
  • Financial & Payments
Stephan T
Stephan T
Posted on Jun 09, 2020

Germanys leading blockchain dev company

Chainsulting have been constantly professional and have always delivered according their promises. We look forward to a continuing work with them over the months and years ahead.

What service was provided as part of the project?

Blockchain Development, Software Development

Rating Breakdown

  • Quality
  • Schedule & Timing
  • Communication
  • Overall Rating

Project Detail

  • $50001 to $200000
Company Response
softstack
softstack

Hi Stephan, Thanks for your review.

Posted on Jun 09, 2020