London-based workflow automation platform, Curvestone AI, has raised $4 million in seed funding to accelerate product development and expand go-to-market efforts, positioning itself as a trusted automation layer for agentic AI in regulated industries.
The round was led by MTech Capital, with participation from Boost Capital Partners, D2 Fund and Portfolio Ventures.
Founded in 2023 by brothers Dawid and Sebastian Kotur, who previously led AI automation programmes at PwC, Metro Bank and GKN, Curvestone AI builds workflow automation tools tailored for regulated industries such as legal, finance and insurance.
The company addresses a critical challenge in AI deployment: whilst individual AI tasks might achieve 98 per cent or higher accuracy, in complex multi-step workflows this small error rate compounds, and by step 12, overall accuracy can fall to just 30–40 per cent. This “compound error” issue has prevented companies from adopting AI at scale due to unreliable results.
Curvestone AI’s platform is designed to maintain consistent accuracy throughout entire document-heavy and compliance workflows, handling tasks like contract audits, insurance policy reviews, compliance checks and document extraction.
Before raising external funding, Curvestone AI reached profitability and grew revenue sevenfold in 12 months. The platform now processes billions of tokens quarterly across legal and financial services workflows.
Dawid Kotur, co-founder and CEO of Curvestone AI, said:
“In regulated industries, quality and scale have always been at odds. You can review everything and go broke, or cut corners and hope for the best. AI that actually works changes that equation by handling routine validation at scale while humans focus on the complex cases that need expert judgement.”
The platform takes a no-code “building-block” approach that lets clients deploy or customise AI workflows without needing engineering resources. The system is built to be “audit-ready by design”, meaning every review leaves a transparent, defensible trail suitable for internal or regulator audits.
Curvestone AI works with all large language models and integrates directly with existing systems, including customer relationship management software, document management tools and loan origination software, without forcing teams to adopt new workflows.
The company works with law firms, mortgage networks and wealth management firms, including Stephenson Harwood, Browne Jacobson, Walker Morris and Pivotal Growth Partners. Curvestone AI was recently selected by Pivotal Group to introduce AI-powered compliance automation across its mortgage services.
Notable achievements include helping Walker Morris to cut service agreement reviews by over 90 per cent (from four hours to 15 minutes), and helping Stephenson Harwood build a multistep compliance workflow addressing compliance with DORA EU rules.
Kevin McLoughlin, partner at MTech Capital, said:
“We have recently seen a lot of AI start-ups focused on automating workflows. Curvestone is solving the hard technical problem of automating complex workflows while achieving high accuracy, and accuracy is paramount in regulated industries like financial services.”
McLoughlin, who is joining Curvestone AI’s board, added that whilst many AI start-ups are burning significant capital, his firm was impressed that the founders bootstrapped to profitability before taking any outside funding: “The early traction they’re seeing validates real market demand.”
