Software Expert Witness
A software expert witness analyzes the software at the center of a dispute — source code, system architecture, and development records — and explains what it shows in expert reports, deposition, and trial testimony. Sidespin Group provides PhD-level software expert witnesses for patent, trade secret, copyright, and contract litigation in U.S. District Courts, the ITC, and PTAB proceedings.
Every engagement is matched to the specific technology at issue, from artificial intelligence and cloud systems to networking, telecommunications, and mobile devices, and led by an expert who combines hands-on engineering experience with testifying experience.
How We Help Clients
Sidespin Group provides testifying and consulting expert witnesses for software and technology litigation. Our network of experts covers patent infringement, invalidity, copyright infringement, trade secret misappropriation, and breach of contract cases, with source code analysis to support each engagement.
Our experts have testified in U.S. District Courts, the International Trade Commission (ITC), Patent Trial and Appeal Board (PTAB) proceedings, state courts, and arbitration.
Our testifying software expert witnesses are PhD computer scientists with industry engineering backgrounds, retained in federal patent, trade secret, copyright, and contract litigation.
Patent Infringement
Patent infringement cases involving software require experts who can map claims to source code, explain technical functionality to non-technical audiences, and withstand cross-examination. Our experts have opined on infringement and invalidity in cases involving Google, Apple, Facebook, Intel, Nokia, and other major technology companies. We support claim construction, infringement analysis, damages input, and source code review. Our software patent expert witnesses support ITC Section 337 investigations and district court cases alike, from pre-filing viability analysis through trial.
Trade Secret Misappropriation
Trade secret cases in software typically involve former employees who take proprietary code, algorithms, or technical knowledge to a competitor. The technical challenge is identifying what constitutes the trade secret, whether it was actually misappropriated, and whether it has independent economic value. Our experts analyze source code, development histories, and technical documentation to build or defend these claims. A software trade secret expert witness can also establish independent development timelines through version control forensics.
IPR & Validity
Inter partes review and validity challenges require precise mapping of prior art to patent claims. The analysis must hold up to the PTAB‘s distinct evidentiary standards while remaining consistent with any parallel district court positions. Our experts prepare invalidity and validity opinions, analyze prior art references, and provide declarations for IPR petitions and responses.
Source Code Review
Source code review is central to most software litigation. Whether the task is identifying infringing functionality, tracing misappropriated trade secrets, or evaluating code quality in a breach of contract dispute, the analysis must be rigorous and the explanation must be clear. Our reviewers have worked at companies including Google and Facebook, and routinely handle codebases in C, C++, Java, Python, JavaScript, and other major languages.
Copyright Infringement
Software copyright cases range from direct code copying to more complex claims of contributory copyright infringement, where a platform or service facilitates unauthorized copying by others. These cases require analysis of code similarity, clean room development practices, and the scope of copyright protection for functional elements. Our Ph.D. computer scientists have handled both direct and contributory copyright infringement matters. Retaining a software copyright expert witness early helps frame what the copyright does and does not protect.
Breach of Contract
Software development projects that fail to meet contractual obligations are a common source of litigation. The disputes typically involve missed deadlines, budget overruns, or deliverables that do not meet specifications. Pinpointing the technical root cause requires experienced software development experts who can distinguish miscommunication from incompetence from unreasonable expectations. Our experts have supported breach of contract cases including a $20 million verdict involving proprietary LTE technology. A software contract expert witness evaluates delivered code against specifications, industry standards, and professional engineering practices.
Practice Areas
Software disputes are rarely generic: the case turns on the specific technology. Each practice area below is covered in depth on its own page, with representative matters and the questions our experts answer.
- Artificial Intelligence — Machine learning systems, model training and provenance, generative AI, and AI-related IP disputes.
- Internet and Web — Web applications, APIs, e-commerce platforms, SaaS agreements, and internet protocols.
- Telecommunications — Cellular networks through 5G, Wi-Fi, Bluetooth, VoIP, and telecom standards and patents.
- Software Development — Development practices, failed software projects, specification compliance, and engineering standards of care.
- Source Code Review — Forensic source code analysis for patent, copyright, and trade secret litigation.
- Networking Software — Network architectures, routing and switching, protocols, and network performance disputes.
- Cybersecurity — Data breaches, security engineering practices, encryption, and security liability standards.
- Cloud Computing — Cloud architectures, virtualization, distributed systems, and cloud service agreements.
- GPS & GIS — Positioning, navigation, geolocation systems, and mapping technologies.
- Database Systems — Database architectures, data integrity, SQL systems, and data-management disputes.
- Smartphone & Smart TV — Android and iOS devices, smart TVs, wearables, and mobile hardware-software integration.
- Streaming & Video — Video streaming, codecs, content delivery networks, and DRM technologies.
Case Studies
Patent Infringement
The patent holder was interested in analyzing the base station source code of several potential infringers. We worked with the already established claim chart to identify similar features in the source code and provided English language descriptions with citations of how and where the source code is exhibiting potentially infringing behavior. We also helped draft expert declarations.
Patent Portfolio Evaluation
A large communications equipment manufacturer was interested in understanding the value of their newly acquired patent portfolio. We analyzed the asset by categorizing the patents by area of invention, organized them into sub-areas and families, and identified potential targets for assertion. As a second step, we analyzed a specific set of patent families against a specific target. We were able to identify sets of assertable patents across several patent families, and assisted with creating initial claim charts.
Contributory Copyright Infringement
Our clients, the two largest bridalwear companies in the United States, complained that a cloud firewall provider enabled copycat manufacturers to commit copyright infringement by displaying our clients’ photographs. DMCA takedown notices were not possible to file, because the cloud firewall hid the infringers’ web servers. We helped interpret the DMCA and put it into technical context to make the complaint actionable.
Clients
Our experts have been retained by both plaintiffs and defendants in cases involving Google, Facebook, Apple, Uber, Intel, Cloudflare, Nokia, eBay, Salesforce, Slack, Dell, Roku, and others.
Previously Retained by
We have worked with attorneys at Fox Rothschild, Alston & Bird, Boies Schiller Flexner, Manning, Morgan Lewis, Stoel Rives, Hopkins Carley, Bursor Fisher, Stark & Stark, and others.
Frequently Asked Questions
What is a software expert witness?
A software expert witness is a technical specialist, typically a PhD-level computer scientist or veteran software engineer, retained in litigation to analyze software evidence and explain it in expert reports, depositions, and trial testimony. They opine on questions such as patent infringement, code copying, trade secret misappropriation, and whether delivered software met contractual specifications.
How do you find a software expert witness?
Attorneys typically find software expert witnesses through specialist consulting firms, referrals, and prior testimony records, evaluating candidates on technical depth, communication skills, and testifying experience. Sidespin Group maintains a network of PhD-level software experts and matches the specific technology at issue, from source code and cloud systems to networking and AI, to the right expert.
Who provides expert witness services for software patent litigation?
Sidespin Group provides expert witness services for software patent litigation, including infringement and invalidity analysis, claim construction support, source code review, and testimony. Our experts have opined in cases involving Google, Apple, Facebook, Intel, and Nokia, in U.S. District Courts, the ITC, and PTAB proceedings.
What should attorneys look for in an IP litigation expert witness?
Look for demonstrated expertise in the specific technology at issue, prior deposition and trial experience, and the ability to explain complex systems clearly to non-technical audiences while withstanding cross-examination. Credentials such as a PhD, industry engineering experience, and publications strengthen credibility with judges and juries.
Speak with an Expert about Your Case
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- 8am – 6pm PT
- 11am – 9pm ET
Discuss your Case
- info@sidespingroup.com
- (800) 510-6844
- Monday – Friday
- 8am – 6pm PT
- 11am – 9pm ET
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