Delivering Value;
Not Hours
Hourly billing rewards time spent, not problems solved. Mercurae works differently: fixed monthly retainers and fixed project fees, agreed upfront, with no retrospective charges and no surprise invoices. Our incentive is the same as yours, to reach the right answer efficiently. You pay for outcomes, progress and quality, not open-ended time.
Fixed fees agreed before any work begins
Direct line to your lawyer, no gatekeepers
Long-term partners, not one-off transactions
Advice priced on value delivered, not time spent
Legal support that scales with your business
Your priorities shape how we work, not the clock
How We Work
Mercurae is your outsourced in-house legal team, delivered as a firm rather than a fractional hire. We start by understanding your business, your people, your pipeline and your appetite for risk. We then support you through two simple models: a fixed monthly retainer for day-to-day corporate, commercial and employment matters, and fixed project fees for discrete work such as M&A. Regular check-ins keep scope, priorities and fees aligned as your business evolves.
Get In Touch
Retainer
A dedicated, embedded legal function for an agreed monthly fee, supporting day-to-day queries, strategic decisions and everything in between. Ideal for organisations without in-house counsel, or those needing additional capability, bandwidth or expertise.
One agreed monthly fee, with no hourly billing and no surprise invoices
Lawyers who build long-term knowledge of your business, your people and your risk appetite
Project
For transactions, investments, restructures and major commercial projects: a clearly defined scope and a fixed fee, delivered against agreed milestones and timelines. Senior lawyers lead every project from kick-off to completion.
Fixed fee and scope agreed upfront, tied to clear milestones
Senior-led delivery from lawyers with City firm and in-house deal experience
Tech-Enabled Legal
We are in the efficiency business, and technology is how we compound it. The Mercurae App gives our team, and our clients, a live view of every instruction: progress, priorities, usage and spend, all in one place. Behind the scenes our lawyers pair deep expertise with AI tooling, because we believe a skilled human working with a machine will always beat either working alone. The result is productivity, delivered to you at speed, clarity and value, and we are only getting started.
Understand usage and billing
See how your retainer is being used, instruction by instruction, so fee conversations are grounded in shared data, and there are never surprises.
Your lawyer, a click away
Send an instruction or a question directly through the Mercurae App and our lawyers are notified immediately, or email or telephone. No formality, no gatekeeping, no barriers to asking.
Visibility
Live dashboards across all open matters, so you always know what is in progress, what is waiting on you and what is complete.
Areas of Expertise
From first investment to exit
Corporate
Investment rounds, shareholder agreements, articles of association, reorganisations and M&A, handled by lawyers who have sat on the client's side of the table. We structure businesses so they are easier to invest in, easier to run and easier to sell, and we keep the paperwork ready for the diligence that follows.
Contracts that keep pace with the business
Commercial
Customer, supplier, technology and SaaS contracts, drafted and negotiated at commercial speed. We build playbooks, templates and negotiation guardrails so your teams can close deals confidently, with Mercurae on hand for the points that genuinely need a lawyer.
People decisions, made with confidence
Employment
Contracts, policies, senior hires and exits, restructurings and the everyday HR questions in between. We give managers clear, practical answers quickly, so people issues are resolved early, fairly and in line with the way your organisation actually works.
Further areas of expertise
Data Protection
UK GDPR compliance, privacy notices, data-sharing and processing agreements, international transfers and breach response. We focus on what regulators and counterparties actually expect, so you get proportionate, workable compliance rather than paperwork for its own sake.
Intellectual Property
Ownership, licensing and commercialisation of the ideas, brands, software and content that give your business its edge. We make sure IP is properly secured in your contracts, with employees and contractors, and across your supply chain, so its value stays with you. We work with patent and trade mark attorney global specialists to ensure registration of valuable IP.
Regulatory Compliance
Governance, compliance frameworks and policies designed around your sector's rules and your actual risk profile. We help you understand what regulation requires, build proportionate controls and evidence compliance clearly, so regulatory questions never stall a deal or a decision.
Orange to yellow gradient background with text: Proud to be a member of LC Lawyers Cooperation.
We are proud to be a member of Lawyers Cooperation, an agile team of experienced and entrepreneurial business lawyers with 19 boutique firms in Europe and beyond.
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Whatever the challenge, we are here to make it happen.

We are practitioners in The Art of Possible.
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Copyright © 2026 Mercurae Limited, 10 Rathbone Place, London W1T 1HP
Mercurae Limited (company no. 12780967) is not authorised or regulated by the Solicitors Regulation Authority; it does not carry on reserved legal activities.
Our Partners, Consultants and Legal Counsel are solicitors individually authorised and regulated by the SRA. Regulatory information.