Litigation legal tech platform Wexler is diversifying its client base towards barristers’ chambers and investigations, as the startup looks towards a new funding round and US growth.
The ‘fact-finding’ technology that helps disputes lawyers establish the facts of a case is beginning to see uptake among barristers, according to co-founder and CEO Gregory Mostyn (pictured). ‘We have a large barristers’ chambers as a client which we will hopefully announce soon as well as a few more in the pilot phase,’ he said. ‘We see strong growth in that sector.’
In September, the company raised $5.3m in seed funding, at the same time as it unveiled Wexler Real-Time, a live fact-checking tool. Though Mostyn told Legal Business there are ‘imminent’ plans for a Series A funding round, the CEO explained that Wexler didn’t necessarily require additional capital, but that another raise would accelerate the company’s already rapid growth.
Mostyn’s focus is now pivoting from product development to rollout, as Wexler looks to grow market share and tap new markets. ‘We have a deep and detailed product but we want to double down on our go-to-market, especially in the US,’ he said.
This extends to an aim to crack the domestic US market, with Mostyn referencing ‘national US firms, as well as global firms with offices in London.’
The platform’s revenue grew by 15x in 2025 and is on track to grow 2.5x by the close of Q1, Mostyn said.
Clifford Chance was Wexler’s first major law firm client, with the magic circle firm committing last March to extend its partnership after a six-month pilot. Since then, Wexler has added Addleshaw Goddard, HSF Kramer and Goodwin as clients – with more on the way.
‘We’re working with some really large firms under NDA at the moment, which we’ll be announcing soon,’ Mostyn said.
Mostyn, whose father is a retired high court judge, co-founded the company with CTO Kush Madlani, and together they developed the platform to extract relevant facts from troves of documents and arrange them in a narrative.
‘LLMs are not good at this kind of temporal reasoning or understanding, sequencing events or noticing an inconsistency because someone was aware of a fact before they said they were,’ Mostyn explained.
Last month, US AI company Anthropic launched a new plugin for its Claude model for tasks that have seen more focus in the legal tech space such as document review, creating some anxiety that a widely accessible, and currently free, tool may begin to rival the focused legal tech firms.
For Mostyn, however, Wexler’s strength is that it is a ‘bespoke and custom’ tool to solve a particular pain point rather than a more general platform, and others in the legal tech space argue that a platform designed for legal offers advantages that a plugin for a general model cannot.
‘But nonetheless,’ Mostyn said, ‘It’s not a niche solution, it is the core exercise of a disputes lawyer.’ There are several other companies targeting disputes work, including Clearbrief in the US and Crimson in the UK, which is currently a part of A&O Shearman’s legal tech incubator, Fuse.
‘New entrants to the market is a good sign, there’s validation in the market,’ Mostyn said.
Mostyn is also confident that Wexler offers a product that provides distinct benefits. Madlani created Wexler by joining multiple LLMs to operate in sequence in what Mostyn called an ‘iterative’ process.
‘We have a fact extraction pipeline,’ said Mostyn, ‘which rationalises and elucidates facts from these complex datasets.’ As part of this process, Wexler’s platform deliberately includes 10-15% more items in the ‘fact-bank’ of a case than a human would pick out, to avoid any omissions of material that might be important to a case.
On top of this, Wexler has ambitions beyond legal, too. ‘We are interested in any areas you need a factual matrix,’ said Mostyn, referring to insurance and investigation work. ‘Facts are the engine that powers the rest of the products.’
