Sonnet Capital — Legal Technology

Build value in legal technology through capital and involvement.

We back legal technology founders through strategic partnerships, angel investment, and board-level support — capital paired with real operating involvement, not a passive cheque.

Sector-led

One sector, not a mandate

Focused on legal technology and adjacent workflow infrastructure.

Active

Involved, not passive

Capital paired with involvement, challenge, and practical support.

Selective

Discipline over volume

Backing founders with clear thinking, traction, and discipline.

Long-term

Built to compound

Durable value creation rather than short-term noise.

The thesis

A focused strategy for legal technology growth.

Sonnet Capital is building a portfolio around the legal sector’s move toward better workflows, stronger knowledge systems, improved delivery, and smarter use of AI. We look for founders with clear domain insight, useful products, and the ambition to build something that matters.

How we get involved
01

Commercial partnerships

Partnerships that create distribution or market access for a portfolio company.

02

Founder collaboration

Working directly on product, go-to-market, and positioning.

03

Angel investment

Selected early-stage or growth-stage businesses.

04

Board and advisory roles

Active guidance where a seat at the table adds real value.

05

Hands-on support

Sharpening execution and building enterprise credibility.

Read the full thesis ↗

Where it fits

The kinds of companies that fit.

Workflow & coordination

Businesses improving how legal work is captured, assigned, tracked, or executed across teams.

Knowledge & intelligence

Products that make prior work product, precedent, matter insight, or internal know-how easier to find and use.

AI-enabled delivery

Companies applying AI in ways that improve quality, speed, insight, or economics for legal service delivery.

Infrastructure & compliance

Tools that strengthen governance, data handling, process control, and enterprise readiness.

Professional services leverage

Platforms that help firms scale output, improve margin, or create a better client experience.

Founder-market fit

Teams that understand the problem deeply and can turn insight into disciplined execution.

“Capital is one part. Execution support is the other.”
— Sonnet Capital
Who we back

Startup and early-stage growth companies.

We support founders at startup and early-stage growth, pairing capital with advisory support as they build. Where a portfolio company needs deeper operational, strategic, or AI-implementation work, that sits with our sister company.

Visit Sonnet Advisors, our consulting arm ↗
Led by

Craig Miller — 25 years in technology and growth, including 15+ years leading digital transformation for Microsoft Consulting, with board, M&A, and angel-investment experience.

Structure
Sonnet Capital LimitedUnited Kingdom
Sonnet Capital GmbHSwitzerland

Two entities, one strategy — both wholly owned by founder Craig Miller.

Your next move

Building something in legal technology? Let’s talk about where we can help.

A short call is the fastest way to find out whether there’s a fit — for capital, for a partnership, or just for a second opinion.

Book a call ↗