Best Sirion Alternative for Law Firms in the UK (2026)

Sirion, from SirionLabs, is an AI driven enterprise contract lifecycle management platform. It is strongest after signature, in obligation management, supplier and vendor contract tracking, contract analytics and risk scoring across very large portfolios. Big, procurement heavy organisations use it to keep thousands of supplier agreements under control. It is a serious tool, but law firms in the UK still compare it against other platforms on fit, AI depth, implementation effort and cost. This guide explains what Sirion does well, why law firms look around, and the real alternatives compared fairly. ## What Sirion is and who it suits Sirion suits large enterprises and procurement teams that run complex, high volume supplier contracting and need deep post signature obligation and performance management. For that buyer it is a capable, well supported platform. ## Why UK law firms look for an alternative Even strong platforms get compared. The first reason is cost and scale, since Sirion is priced and built for the large enterprise and can be heavy for a smaller team. The second is implementation weight, because a full deployment is a project. The third is focus, since its centre of gravity is supplier and post signature management rather than fast front end drafting. The fourth is pricing transparency, because quote only pricing makes budgeting and comparison harder. None of this makes Sirion a weak product. It means a buyer should test whether AI, workflow, cost and jurisdiction fit match their real priorities before committing. ## What law firms actually need A law firm needs drafting depth, precise clause control, the ability to match a client's or the firm's house style, linkage between documents, matters and clients, and clean exports to Word and PDF. Most CLM tools are built for corporate in house teams rather than firms, so fit for firm workflows matters more than procurement style features. ## The real alternatives for a UK law firm, compared fairly SpotDraft is an AI CLM aimed at fast moving in house teams, with drafting, workflow and tracking, and a reputation for quick onboarding. Pricing is quote based. Juro is a browser native contract platform with a clean editor and automation, popular with startups and scaling in house teams for everyday commercial contracts. It publishes some plan information but confirm current pricing with the vendor. LinkSquares focuses on AI analytics and extraction across a large executed estate, suited to in house teams that need visibility and reporting. Pricing is quote based. Ironclad offers a strong workflow designer and AI features for orchestrating the whole contract process, popular with large commercial and legal teams. Pricing is quote based. Adira is an AI legal operating system built on Anthropic's Claude that drafts, reviews, edits and tracks contracts in one workspace, worth a look as a challenger where AI drafting depth and transparent pricing matter, with the honest caveats below. ## Where Adira fits for law firms, and where it does not For a law firm, Adira is one of the few options designed with firm style drafting in mind rather than only corporate tracking. Its AI Drafting Studio produces a full structured contract from a catalogue and a brief, its company persona can be tuned to the firm's or a client's house style, clause level editing gives precise control with a diff, and files link documents to matters and clients. It is built on Claude, keeps a structured clause tree, exports cleanly to Word and PDF, and does not train on your corpus. Adira reports that 18 law firms already use it and rank it highly, with contract review and due diligence cut from 10 to 12 days down to under 2 hours in those deployments, its own measured result worth testing on a real matter. The honest caveat is India first depth today and expanding, so a UK firm should check its practice areas in the trial. On pricing, Adira publishes per seat rates, roughly 70 and 140 pounds per seat per month billed annually as an approximate conversion from about 89 and 179 US dollars for its Practice and Firm tiers, with a 7 day free trial and Enterprise priced custom (approx only, check Adira's pricing page for current figures). That is a transparent reference point that quote only incumbents rarely offer. See how Adira approaches drafting and review. ## How to choose Start from what Sirion did not meet for you. If you want quick onboarding for commercial work, look at SpotDraft or Juro. If you need analytics across a large estate, look at LinkSquares. If you want firm style AI drafting with precise clause control, try Adira. Then test each on a real matter in your main practice areas, check Word and PDF export fidelity, and pick the tool that matches how your firm actually drafts. ## Switching from Sirion: what to check before you move A move only pays off if the new tool fits how you work, so run the checks a careful buyer would. First, test export and import: confirm you can get your existing agreements and their key metadata out of Sirion and into the new tool without rekeying, and that renewal dates and obligations carry across. Second, test the integrations you actually use, from signature and storage to your CRM or finance stack, rather than the full list a vendor advertises. Third, put security and data handling through review early, including where data is stored, who can access it and whether your contracts are used to train any model. Fourth, run a real pilot on the contract types you sign most and measure drafting and review time against your current baseline, not a demo script. Fifth, model the fully loaded cost over three years including setup, training and any services, not just the per seat headline. A switch that clears those five checks is one you can defend to the business. This article is general information, not legal advice.