16-17 June 2027 – London, InterContinental O2 | Magazine

LegalTech Diaries Volume 16

Bill Johnson

Founder & CEO
TCDI

LegalTech Diaries Volume 16

Bill Johnson

Founder & CEO
TCDI

You founded TCDI in 1988 and have steered the company through nearly four decades of transformation in legal technology. You have said that AI is too exciting to walk away from. What is it specifically about this moment in eDiscovery that feels different from every other wave of disruption you have navigated?

Over the past 37 years, the changes in legal technology have been evolutionary. Capabilities have improved in a consistent fashion, adapting to the changes in the nature of data being processed and the techniques used for its storage and production. Although there were significant changes tied to new technology, such as Technology Assisted Review (TAR), in the overall scope of the last few decades these were incremental changes and nothing that was paradigm shifting.

Over the past three years, the introduction of AI technology and techniques into the legal space has been revolutionary. It’s affecting every aspect of our service delivery, not just in the services offered to our clients, but in the fundamental way we do business.

For example, we have always developed software for use in the legal market, but AI is changing how we work with the integration of AI-assisted code generation. The result is a significant reduction in the time to develop new software. This allows for the creation of not just more robust solutions, but solutions addressing a wider breadth of problems that previously went unaddressed due to cost of development considerations. AI has also found its way into marketing, technical operations, finance and other aspects of everyday business. It’s making an impact not only on how we deliver solutions to our clients and the platforms they use, but on the entirety of the business, changing it from the ground up. AI has unleashed creative thinking throughout our organisation in a way that is truly revitalising.

TCDI’s Tech Lab was set up to rigorously evaluate AI vendors and emerging technology before they reach client workflows. Most legal teams lack the bandwidth to do that kind of due diligence themselves. What are the most common blind spots you see when law firms or corporate legal departments try to assess AI tools on their own?

Many teams end up judging tools based on demos, but actual legal work is often more complex and way messier. Tools need to be evaluated in an environment that reflects real world conditions. That means considering a realistic scope, the complexity of data, the actual questions being asked (for example, real world criteria for a privilege call), and a statistical analysis of the results. Demos are often constructed using a data set selected to produce the best results. Tests should be conducted using data that is as close to the real world as possible.

AI can perform very differently depending on the type of documents and workflows, and not every team has time to test it against their own data. It’s easy to overlook how well a tool actually fits into existing systems and processes, which can make adoption harder than expected. Many AI tools require a specific environment to run in, such as a particular cloud environment, which will need additional work to build adequate workflows into and out of existing data stores. Things like data security, privilege, and auditability are critical but can be difficult to evaluate thoroughly without a structured approach. Too often, these items are left until the end of evaluation (or even until implementation) when they become difficult to address and can affect the defensibility of the entire process. Teams don’t always have clear success metrics upfront, so it can be hard to measure whether a tool is really delivering value. “Good” is often a relative term, and defining the expectations of an AI-enabled process is instrumental in building a solid evaluation of any technology.

SMART Data won TCDI the Best Use of AI in eDiscovery award two years running. The product enriches unstructured content before human review even begins. How do you draw the line between what AI should handle autonomously and what still needs a human in the loop, and is that line shifting?

AI is strongest at handling large volumes of repetitive work like organising data, tagging content, and surfacing patterns early. It’s especially good at summarisation.

A good approach is to let AI do the heavy lifting first, such as high level in/out calls, then have humans focus on validation, edge cases, and final decisions. It can significantly speed up 1st Pass Review, but it can’t fully understand legal nuance, intent, or context the way a human does. For higher-risk decisions, like privilege calls or anything that could impact strategy, human judgment is still important. Transparency matters. Teams need to understand how the AI reached its output (note I didn’t say decisions) in order to trust and verify it. The line is shifting, but gradually. AI seems to be getting better at more complex tasks, so humans can spend less time on 1st Pass Review and more time on oversight and strategy. The line won’t disappear though, it will only move. As confidence in the technology grows, humans will still need to stay in the loop, but at higher-value points in the workflow. The goal needs to be a balanced workflow where AI improves speed and consistency, and humans ensure accuracy and accountability.

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