Lumen Juris
French SaaS platform combining AI contract analysis with full contract lifecycle management for lawyers, in-house counsel, procurement and HR teams, with every alert tied to Légifrance sources and all documents hosted in France.
What is Lumen Juris?
Lumen Juris is a French SaaS platform that pairs contract lifecycle management with AI-assisted contract analysis. It is published by Geoffrey Pin, a sole trader operating under the Lumen Juris trade name from Groslay, in the Val-d’Oise, and run by a team of three: Geoffrey and Laurent, co-founders with technical and product backgrounds, and Sonia, a consulting lawyer. The project grew out of a simple observation, that practitioners in firms and legal departments run short of time, and was triggered by the opening up of French public legal data. The platform rests on five blocks: a contract generator, review and analysis, collaborative negotiation, electronic signature, and deadline tracking with a contract repository. Contracts are imported as PDF or Word files and analysed clause by clause, with risky passages highlighted directly in the text. Four families of anomaly are detected: risky clauses, missing clauses, significant imbalance under Article 1171 of the French Civil Code, and version discrepancies. The tool returns an overall compliance score together with alerts ranked by severity. What sets the analysis apart is its sourcing. A dedicated Jurisprudence tab attaches rulings of the Cour de cassation, France’s supreme civil court, and of the courts of appeal to each clause, with the exact reference, a summary and a favourable, qualified or unfavourable reading. Legal texts come from Légifrance, the French state’s official legal database, queried through the PISTE API, alongside open case law and government open data. A clause library doubles as an internal contract playbook, and a discussion space lets users question the tool about the clauses it has flagged. The positioning is deliberately cautious: the AI prepares, the professional decides. The publisher presents the product as an aid to review, never as legal advice, and repeats that human control is mandatory. Hosting is entirely French, with the website, the application and the backups all held by o2switch in Clermont-Ferrand. The product is web-only: there is no mobile application and no browser extension.
What it does
- Upload a PDF or Word contract and get a clause-by-clause analysis highlighted inside the document
- Read an overall compliance score and alerts ranked by severity
- Consult the case law attached to each clause, with its exact reference, a summary and a favourable, qualified or unfavourable trend
- Apply reasoned rewordings taken from the clause library
- Compare an incoming contract with its earlier versions through automated redlining
- Negotiate through a secure link, with no account needed on the counterparty’s side
- Sign electronically, track deadlines and receive notice-period alerts
When to use Lumen Juris / When not to
A quick filter to help you decide if Lumen Juris is the right fit.
When to use Lumen Juris
- Lawyers and law firms preparing a review: sensitive clauses are surfaced before a partner reads the contract.
- In-house counsel and legal departments standardising their drafting through a clause library used as an internal reference.
- Procurement, HR and operational teams with no legal training who need to document a first review before escalating.
- Small French companies with no legal department on the Starter tier, and larger structured mid-market companies on Pro.
- Freelancers and micro-businesses on the permanent Free tier, handling everyday agreements: service contracts, NDAs, employment contracts, leases, partnerships and supplier contracts.
When not to use Lumen Juris
- Anyone who needs representation in court: the publisher states this is neither litigation representation nor individualised legal advice.
- Businesses working outside French law: the sources are Légifrance and French case law, and the interface exists in French only.
- Users looking for a substitute for a lawyer on legal strategy, disputes, significant financial stakes or procedural deadlines, which the site explicitly sends to a lawyer.
- Teams handling atypical or bespoke legal structures, for which no claim of exhaustive detection is made.
- Anyone wanting mobile or offline access: the product is web-only, with no mobile application and no browser extension.
How to use Lumen Juris
A typical end-to-end flow, from setup to results.
- Create a named account, after an introduction through the contact form or a Calendly demo rather than open self-service sign-up.
- Import the contract as a PDF or Word file, or draft it directly in Lumen Juris; no configuration is required for the review to start.
- State the kind of analysis you want, then let the AI review the contract clause by clause and rank what it finds.
- Work through the points of attention: highlighted passages, suggested rewordings and missing clauses.
- Question the discussion space about any clause that has been flagged.
- Apply the corrections and enrich the clause library so it becomes your internal reference.
- Send the contract into negotiation: the counterparty opens a secure link in the browser, comments and proposes changes without an account or installation.
- Move the agreed version into electronic signature, simple as standard or eIDAS advanced signature through DocuSign.
- File the signed contract in the repository, then follow deadlines and notice-period alerts from the renewals dashboard.
- Export a summary of the main points to check.
Pros & Cons
Pros
- Every alert is attached to a verifiable legal reference, from Légifrance or case law, which makes the reasoning auditable rather than a black box.
- Hosting is entirely in France, backups included, with the provider named: o2switch in Clermont-Ferrand.
- Unusual transparency on what is missing: the publisher states outright that it holds no ISO 27001, HDS, SecNumCloud or SOC 2 certification.
- A named and dated subprocessor table is published, and retention periods are set out line by line.
- The permanent free plan is genuinely usable: unlimited generation, unlimited simple e-signature, three AI analyses a month and legal monitoring.
- The lifecycle runs end to end without a break, from generation through review, negotiation, signature and the repository, with no export or re-keying.
- Prices are published per tier, online cancellation is offered “in three clicks” under French Decree 2023-417, and the counterparty needs neither account nor installation to negotiate.
Cons
- The scope is strictly French: Légifrance sources, French case law and a French-only interface make it unusable outside French law.
- No security certification at all, as the publisher itself states: no ISO 27001, HDS, SecNumCloud or SOC 2.
- The publisher is a micro-business, a sole trader with no share capital and a team of three, which raises a continuity question for critical use.
- The AI model provider is never named and processing may take place outside the European Union, the single exception to the French hosting promise.
- The training promise is inconsistent: the commitments page presents non-training as absolute, while the data protection policy makes it conditional.
- No public API and no API documentation: the API exists only on the Enterprise tier, “bespoke”, and there is no mobile app or browser extension.
- Entry-level quotas are tight, at three AI analyses a month on Free with watermarked exports and thirty on Starter, and the displayed Starter and Pro prices are the annual rates, the monthly ones costing 25% more (49 EUR and 119 EUR).
Pricing & Plans
A permanent free plan is available at 0 EUR. Prices are published on the pricing page in euros excluding tax, per user and per month, with a monthly / annual toggle offering a 20% discount on annual billing; the page displays the annual rate by default. The lowest paid entry point is the Starter tier at 39.00 EUR excluding tax per user per month on annual billing, or 49.00 EUR excluding tax per user per month on monthly billing. The Pro tier is 99.00 EUR annually or 119.00 EUR monthly, on the same basis, and the Enterprise tier is quoted on request. Subscriptions are monthly with tacit renewal, invoiced in advance and paid by card, with collection handled by Stripe within the European Union. Late payment by business customers carries interest at the increased statutory rate plus a fixed 40 EUR indemnity per invoice. The publisher may change its prices with reasonable notice, and consumers may terminate without penalty in the event of an increase.
- unlimited contract generation with watermarked exports
- unlimited simple electronic signature
- three AI contract analyses per month
- collaborative negotiation included
- legal monitoring included
- and a repository tracking five contracts.
- everything in Free
- plus watermark-free exports
- thirty AI analyses per month
- unlimited contracts and templates
- unlimited deadline tracking with notice-period and Chatel Act alerts
- and a renewals dashboard.
- everything in Starter
- plus unlimited AI analyses
- case law linked to the analysed clauses
- internal approval workflows
- ten eIDAS advanced signatures per month through DocuSign
- and standard integrations.
- everything in Pro
- plus advanced RBAC and multiple workspaces
- advanced signatures in volume
- bespoke API and business integrations
- a reinforced GDPR audit and compliance module
- SSO
- an SLA
- dedicated support and onboarding.
Data, GDPR & hosting
A consolidated view of how Lumen Juris handles your data.
GDPR overview
GDPR implementation is documented and specific. Both privacy policies, updated 18 September 2025, cite Regulation (EU) 2016/679 and French Law 78-17. The controller is named: Geoffrey Pin, 14 rue Berthelot, 95410 Groslay. Legal bases are stated: Article 6(1)(b) for contract performance, 6(1)(f) legitimate interest for security and B2B prospecting, 6(1)(a) consent for non-essential cookies. Access, rectification, erasure, restriction, objection, portability and post-mortem instructions are exercised at rgpd@lumenjuris.com, answered within one month, extendable by two. A processing record is kept, non-EU transfers rely on standard contractual clauses, a DPA can be annexed and an NDA supplied on request. Breaches are notified within 72 hours to the CNIL, the French regulator. The publisher states two caveats: no DPO appointed under Article 37, and no ISO 27001, HDS, SecNumCloud or SOC 2 certification. AI Act transparency notices appear in the legal terms.
Who owns the data?
Under the terms of sale and the legal notice, imported documents and data remain the user’s property, and the user keeps every right over them. The publisher receives only a limited, non-exclusive, worldwide licence, granted for the time strictly needed to deliver the service: processing, hosting, display and backup. For imported content, Lumen Juris acts as a processor on the customer’s instructions, the customer remaining the data controller; for account, billing, support and prospecting data, Lumen Juris is itself the controller. An export of content is offered on termination or on request, in an open format where possible.
Reuse rights
Imported documents serve one purpose only: producing the analysis or the document requested. They are neither sold nor passed to third parties for commercial ends. Extracts are transmitted to an AI model provider, which the site does not name, in order to produce the analysis; queries sent to the public legal databases are decoupled from the documents and carry only keywords and references, never the text itself. Human access is limited to three cases — a support ticket opened at the user’s express request, a precise technical diagnosis, and a legal requisition — and is authorised, logged and covered by confidentiality. On model training the site contradicts itself: the commitments page and the product page promise that contracts feed no model at all, “neither ours nor a third party’s”, whereas article 9 of the data protection policy is conditional (“without adequate information of the user and, where applicable, without an appropriate legal basis”) and the terms of sale add “unless explicitly consented to”. The models are otherwise fed with French public open data: Légifrance, rulings of the Cour de cassation and the courts of appeal, and state open data. B2B prospecting on business addresses is possible, with objection at any time, and no automated decision-making producing legal effects within the meaning of Article 22 GDPR is carried out.
Data retention & training
Hosting summary
The showcase website, the application, the documents you import and the associated backups are hosted in France, with o2switch, whose servers are at Chemin des Pardiaux, 63000 Clermont-Ferrand. The infrastructure is administered directly by the team. Data is encrypted in transit over HTTPS/TLS and at rest, with encrypted volumes and backups, environments are kept separate and key management is described as strict. The subprocessor table published on the commitments page and dated 28 July 2026 names o2switch in France, Stripe in the European Union for payment collection, and DocuSign in the European Union for eIDAS advanced signature. One line is not named: the AI model provider, whose location is “provided on request” and whose processing may take place outside the European Union, framed by standard contractual clauses. The full named list of subprocessors is supplied on request at rgpd@lumenjuris.com. Jurisdiction is therefore French and European, with that single documented exception.
Things to keep in mind
Risks and trade-offs to weigh before adopting Lumen Juris.
- The outputs are probabilistic: errors, approximations and bias are possible, and the publisher says so in plain terms. Treat the analysis as a first pass, not a verdict.
- No exhaustive detection of unlawful or unfair clauses is guaranteed, and the tool is not legal advice: validation by a professional is required before acting on it.
- Extracts of your documents leave for an AI model provider that is never named, possibly outside the European Union. This is the one breach in the French hosting promise.
- The site contradicts itself on training: non-training is presented as absolute on the commitments page and the product page, but is conditional in article 9 of the data protection policy and in the terms of sale. Get the point clarified in writing before uploading sensitive contracts.
- No recognised security certification is held, which the publisher acknowledges publicly, and the editor is a sole trader with no share capital: assess service continuity before a critical deployment.
- Prices are shown by default on annual billing; the monthly option costs 25% more, so read the toggle before budgeting.
- Homepage testimonials cannot be verified, there is no public social profile and no external evidence of use, and the terms of use explicitly exclude legal and regulatory monitoring from the guaranteed scope.
Setup & Integrations
Technical difficulty
Very low. Nothing is installed: the service runs entirely in the browser. You create a named account, import a PDF or Word file, and the review starts without any configuration. The counterparty needs neither an account nor an installation to negotiate, only a secure link. The one optional effort that pays off is populating the clause library, which turns the tool into a comparison against your own internal standard. SSO and advanced RBAC are reserved for the Enterprise tier. Onboarding goes through the contact form or a Calendly demo rather than self-service sign-up, which adds a step.
Deployment
Integrations
Supported languages
Behind Lumen Juris
Resources
All the official URLs gathered for verification and reference.
Frequently asked questions
How does Lumen Juris work?
How much can I trust the results?
Are my contracts used to train the AI?
Where is my data hosted?
Is there a free plan?
Which file formats can I import?
Does it flag unlawful or unfair clauses?
Is there an API, and how do I cancel?
Should you pick Lumen Juris?
Lumen Juris is a niche tool and makes no secret of it: French law only, from the contract generator through to the repository, and of no use to anyone drafting under another legal system. Its main strength is traceability. Every alert is tied to a verifiable reference, a Légifrance text or a court ruling, so the reasoning can be audited rather than trusted, and hosting is documented down to the named provider, o2switch in Clermont-Ferrand, backups included. The publisher also volunteers what most vendors keep quiet: it holds no ISO 27001, HDS, SecNumCloud or SOC 2 certification, publishes a dated subprocessor table, and sets out retention periods line by line. The main weakness is the size of the publisher, a sole trader with no share capital and a team of three, which is a real continuity question for any critical deployment. The absence of certification deserves the same scrutiny, as does an AI model provider that is never named and may process extracts outside the European Union. A discrepancy also runs through the site: the commitments page promises that contracts feed no model at all, while the data protection policy frames that promise conditionally. The permanent free plan makes evaluation easy, with three AI analyses a month and unlimited generation and simple signature, at no commitment. That is the sensible way in. Before going further, ask for the full subprocessor list and the AI provider’s location, both offered on request, read the data protection policy against the commitments page, and check that the monthly rate rather than the discounted annual one fits your budget. And take the publisher at its word: human review stays mandatory.
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