With the launch of Delphius, Lewis Silkin stepped into the new era of AI legal products, positioning the firm at the forefront of innovation in legal services.

But AI wasn’t just changing how legal expertise could be delivered. It was also changing how clients first engage with law firms.

New platforms were beginning to capture customers earlier in their legal journey, long before they would typically seek traditional legal support.

For Lewis Silkin, this presented a clear opportunity: extend their expertise beyond traditional engagements and bring legal insight to a much wider audience.

Working as their trusted partner, we helped shape this opportunity and launch Lettu: a new platform designed to bring Lewis Silkin’s legal expertise to the fast-moving creator economy.

As the creator economy continues to grow, brand partnerships, exclusivity agreements and licensing deals are being negotiated at scale every day.

Yet the infrastructure around this market has struggled to keep up, leaving many talent managers and creators navigating contracts without legal expertise or valuable years of deal experience.

Working closely with Lewis Silkin, we identified an opportunity to use AI to extend the firm’s expertise into this rapidly growing market.

Then we tested propositions with creators and talent managers to understand where that expertise could deliver the most value.

Two initial capabilities emerged as the foundation of the product: AI-powered contract review and tracking of usage and exclusivity.

Alongside proposition testing, we ran a series of technical spikes to determine how the product’s core capabilities could be built.

Our initial approach explored integrating an existing AI legal platform. But it quickly became clear that relying on its API would limit what the product could do.

Recognising that the real advantage lay in Lewis Silkin’s legal knowledge and commercial expertise, working closely with Partner’s like Phil Hughes, we designed a proprietary system that translates this expertise directly into the product.

The result is a system built around Lewis Silkin’s own IP, with the potential to power future products and ventures across the firm.

LLMs are non-deterministic by design, meaning the same prompt can produce different outputs. In legal services, that variability introduces a real risk. If outputs cannot be trusted, product development stalls.

To solve this, we worked closely with Lewis Silkin's lawyers to define what a good contract review looks like, then built automated tests to measure the system against that standard.

This created a stable baseline for the product, allowing prompts, models and architecture to scale while ensuring the system remained reliable enough to launch.

With the product direction set, it was important to ensure the brand reinforced the experience.

Many AI tools feel cold and transactional. For creators, that distance can quickly turn into mistrust. Lettu needed to feel human, approachable and built for their world.

Our goal was simple: create a brand that connects with the audience while reinforcing the credibility of Lewis Silkin’s expertise.

We developed a light-touch identity that brings warmth and personality to the product. A bold fisheye, selfie-style photography direction puts creators front and centre, making the platform feel immediately relatable.

Some capabilities we wanted to deliver simply did not exist when the project began. Contract red-lining, for example, proved particularly challenging.

Rather than waiting for new technology to appear, the team focused on building the core platform while continuing to explore emerging technical capabilities. As new open-source solutions emerged, they were quickly tested and incorporated into the product roadmap.

This agile approach allowed Lewis Silkin to bring a new kind of legal product to market while the landscape was still taking shape.

Together, we are continuing to build on these foundations, developing further functionality for Lettu’s customers and exploring how the capabilities developed for Lettu can support new ventures across the firm.