One single register for portfolios that nothing used to bring together.
Office, retail, residential: three legal regimes, three rent-review indices, three compliance calendars. Keysy holds them in one system, with an audit trail on every decision.
Guided rollout · data migration included · hosted in the European Union
A mixed portfolio is not just one more portfolio.
As soon as a single asset combines office, retail and residential, it no longer belongs to a single body of rules. Indices diverge, notice periods diverge, energy obligations diverge — and most systems force you to open one file per regime.
Keysy was designed from that constraint, not adapted to it afterwards.
| Regime | Review | Notice | Specific constraint |
|---|---|---|---|
| Office leaseOffices, business premises | ILATannual or three-yearly | 6 months | Tertiary decree — OPERATannual filing > 1,000 m² |
| Commercial leaseRetail | ILCannual | 6 months | Rent cap lifted at the 3-year markrental value, art. L145-33 |
| Residential leaseUnfurnished or furnished | IRLannual, mandatory clause | 3 or 6 months | Rent control + F/G EPC freezereview forbidden |
| Short-term leaseShort duration | FreeICC common | — | Reclassified past 3 yearsconverts to a standard commercial lease |
How the system reads a lease — and what it refuses to decide.
The extraction is not a black box. Every field carries a confidence score, a source page and a status. Below the threshold, the decision goes back to a human.
Reading
The document is segmented page by page: lease body, appendices, riders, plans. Tables and numbered clauses are recognised as such.
Extraction
A model specialised on French legal text identifies the 18 fields of the register and keeps, for each one, the source page and passage.
Control
Business rules applied to the output: rent/surface consistency, index compatible with the regime, ordered dates, applicable caps.
Decision
Above the threshold, the field is proposed pre-filled. Below it, the field is flagged and blocks validation until a manager settles it.
Four rules, non-negotiable.
- Nothing is written without a source.Every extracted field links back to its page and article. A manager can go straight to the text in one click, without reopening the PDF elsewhere.
- The threshold is yours.Configurable per field type. Above it, the field is proposed; below it, it blocks. No lease enters the register with an unresolved field.
- The model does not compute the review.Extraction identifies the index; the calculation is done by a deterministic rule, verifiable and reproducible. A regulated amount never comes out of a probabilistic model.
- Everything is logged.Proposed value, retained value, author of the decision, timestamp. The human correction is kept on the same footing as the proposal.
The portfolio is read, not compiled.
The reports you rebuild today in a spreadsheet are produced continuously: the effect of reviews, the maturity profile, collections, vacancy.
What applied reviews have actually earned
Annualised portfolio rent, with and without contractual reviews applied
Occupancy by asset
Let area against usable area, as of 16 August 2026
Maturity profile and remaining term
Annual rent reaching maturity, by year and by typology — rent-weighted average durations
A validation should not have to wait for you to get back to the office.
Most of what Keysy prepares can be approved in a few seconds. The iOS and Android app, currently in closed testing, will carry the same processing queue, the same validation flow and the same audit trail as the desktop.
- Approve on the move. Reviews, rent invoices, formal notices: the prepared document is viewable and signable from mobile, with strong authentication.
- Be alerted at the right moment. A threshold breach, an unpaid rent, a notice deadline: the notification carries the action, not just the information.
- Record on site. Timestamped photos, readings, move-out reservations — attached to the asset with no re-entry needed back at the office.
- The same log. A validation made from mobile is logged identically: author, timestamp, prior value.
Three operations, held at the source.
The lease is read, not re-keyed.
Parties, surfaces, rent, deposit, review index and base quarter, service-charge clauses, three-year break dates: fields are extracted and attached to the asset. Notarial deeds, move-in reports and riders follow the same path.
Every lease is reviewed against its own index.
The system identifies leases reaching their review date, applies the index and quarter set out in the contract, checks the caps and produces the regulatory letter. The calculation stays broken down line by line and defensible if challenged.
Payments are reconciled, discrepancies escalated.
Accounts are connected read-only through an open-banking aggregator. Every transaction is matched to its lease. Discrepancies, partial payments and emerging arrears feed the processing queue, with the formal notice drafted at the right contractual stage.
What binds the mandate never travels alone.
A rent review, a notice to leave, a formal notice engage the responsibility of both the manager and the owner. The system prepares; the approval remains a human decision, logged and attributable.
Audit trail
Every calculation, every send, every change keeps its author, its timestamp and its prior state. Exportable over any period.
Approval workflow
Thresholds configurable by amount and by act type. Beyond them, the document is routed to a designated approver before it goes out.
Separation of duties
Entry, control and approval can be split apart. Rights by entity, by mandate and by portfolio.
Accountability reporting
Statements by mandate, by asset and by legal entity, in the format expected by the accountant and the statutory auditor.
Exactly where the system stops.
We document the boundary rather than announce full automation. This table matches the state shipped as of 16 August 2026.
| Process | Detection | Preparation | Emission |
|---|---|---|---|
| IRL / ILC / ILAT / ICC reviewDue date, deterministic calculation, notice | Automatic | Automatic | On approval |
| Rent and service-charge invoicingPeriodic issuance, distribution, archiving | Automatic | Automatic | On approval |
| CollectionsReminder, formal notice, forfeiture clause | Automatic | Automatic | On approval |
| Bank reconciliationTransaction ↔ lease · open-banking aggregation | Automatic | Automatic | On approval |
| Document readingLeases, riders, deeds, move-in reports | Automatic | Automatic | On approval |
| Service-charge reconciliationInvoices, allocation keys, tenant statement | Automatic | Assisted | On approval |
| Renewal and cap removalThree-year breaks, notices, rental value | Automatic | Assisted | On approval |
| Energy complianceEPC, audit, OPERAT, F/G freeze | Automatic | Assisted | On approval |
| E-invoicing (Factur-X)VAT-liable leases | Beta | Beta | H2 2026 |
| Tenant portalDocuments, invoices, requests | Roadmap | — | — |
Three configurations, one system.
Office buildings
3/6/9 and short-term leases, ILAT, actual-cost recharging, tertiary decree and OPERAT filing, multi-tenant tracking by floor.
View
Retail assets
ILC, cap lifted at the three-year mark, turnover-indexed variable rent, tenant fit-out schedules.
View
Mixed-use buildings
The case few systems handle: three regimes in one asset, three indices, three calendars — consolidated on a single reporting line.
ViewThe deadlines that apply, and the ones that do not.
We document the exact scope rather than claim general compliance. Whatever does not concern your portfolio is marked as such.
Eleven annual deadlines, held by the system.
IRL reviews
Residential leases reaching their due date, cap checks in tight housing markets.
ILC / ILAT reviews
Commercial and office leases, art. L145-38 notice.
Service-charge reconciliation
Tenant statement for the past year, supporting documents.
Tax statements
Property income consolidated by entity, export to the accountant.
Notice decisions
Six-month notice for a 31 December break.
OPERAT · e-invoicing
Tertiary decree filing, mandatory electronic receipt.
“Keysy was born from a simple observation: property-management systems handle one legal regime at a time. As soon as a building combines offices, a ground-floor shop and flats, management fragments into as many tools — and consolidation is done by hand. We built the register that was missing.”
Tools and references, freely available.
Rent review
IRL, ILC, ILAT, ICC — base quarter, calculation and sample notice.
INSEE indices
History and latest publication of every index, updated automatically.
Regulatory deadlines
2026 and 2027 obligations by lease type and regime.
Deeds and letters
Notice to leave, review notice, formal notice, move-in report.
Rental exposure
Risk assessment of a portfolio from a handful of parameters.
Legal news
Texts and case law applicable to property management.
Evaluate Keysy on a real portfolio.
A forty-minute demo on your own assets, then a pilot on a restricted scope. Your leases are migrated by our teams; you judge on the first review campaign.
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