The smart way to manage rentals
See instantly who paid, who is late, and when to step in. No spreadsheets required.
Sample dashboard
Collected this month
€ 8.250
Late
2
Missing
1
Your rent income, live
Watch every euro arrive
Cynsio links your bank and matches each rent payment to the right lease automatically. No spreadsheets, no guesswork — just a clear view of what comes in each month.
Collected this month
€ 8.250Rent collected per month · auto-matched
Everything you need to manage rentals — in one place
Cynsio brings indexation, bank reconciliation, follow-up and reporting together. Built for the Belgian rental market, from 1 to 10,000+ units.
Nieuwe huur
€ 1.024
Belgian rent indexation, done right
Region-aware calculation (Flanders, Brussels, Wallonia) on the health index. See who is eligible and apply the new rent in one click — with an audit trail.
- Region-aware
- On the health index
- One click + audit trail
Mededeling: +++090/9337/55493+++
Appartement 3B
Janssens · contract #1042
Payments matched automatically
Connect your bank (secure, read-only). Cynsio matches every payment to the right contract on amount, reference and IBAN.
- Secure bank link
- Automatic matching
- Partial payments too
38
4
2
Herinnering verstuurd
Automatisch · 2 dagen voor de vervaldag
Follow-up & reminders
A live view of who paid, who is late and what is missing — with automatic, friendly reminders and escalation when needed.
- Paid · late · missing
- Automatic reminders
- Escalation to formal notice
Prognose 2026
€ 148.200
Cashflow in view
Monthly overviews and a yearly forecast of your income, so you see the money coming.
- Monthly overview
- Yearly forecast
- Export for your accountant
Management, documents & compliance
One source of truth for properties, units, contracts and contacts. Generate letters from templates — with user roles, audit trail and EU hosting.
- Properties, units & contracts
- Letters & documents
- Roles, audit & EU hosting
Your AI rental admin
Cynsio is building an AI layer over your entire rental management: an assistant that knows your portfolio, communication that writes itself, and alerts before anything goes wrong.
Cynsio assistant
Who can I index in March?
3 leases are eligible in March — together +€74 per month.
Apartment Deurne · Studio Antwerp · House Borgerhout
Draft the lettersCommunication that writes itself
Reminders and formal notices, drafted automatically at the right tone and escalation level — in NL and FR.
Smart payment matching
Matches the messy payments too: no reference, from a different account, or a round amount.
Proactive alerts
Cynsio warns you before it goes wrong — looming arrears, a double payment or an unusual amount.
Plus: let AI read your lease and fill in the contract automatically.
How it works
From bank connection to full overview — set up in minutes.
- 1
Connect your bank
Secure bank connection, read-only. We see your incoming payments but can never move money.
± 2 minutes - 2
Set your expected rent
Enter how much rent you expect per property and when. Or let AI pull it from your lease, soon.
Per property - 3
Get clarity instantly
Your dashboard shows in real time who paid, who is late and where action is needed — no more spreadsheets.
Real-time
Free check
Calculate your indexed rent
Enter the original rent and the lease start date. We compute from the official Statbel health index.
Estimate based on the official health index. Cynsio computes it precisely, accounting for region and EPC. Not legal advice.
Read the full indexation guideSimple, transparent pricing
Indicative early-access pricing. Lock in founder rates before launch.
Solo
For getting started
1 property
Sign up- Manual payment tracking
- Rent indexation calculator
- Automated reminders
- 1 user · no bank connection
Landlord
Collect & index correctly
Private landlord
Sign up- Automatic bank reconciliation (read-only, 1 account)
- Indexation letter + one-click + audit trail
- Automated reminders
- Accountant export
- 1 user
Manager
Full management & compliance
Active landlord
Sign up- Everything in Landlord
- EPC & compliance dossier
- Document management
- Dunning ladder & escalation
- Up to 5 users
Rentmeester
For agencies & portfolios
Agency / portfolio
Sign up- Everything in Manager
- Owners & bulk communication
- Multiple bank connections
- Unlimited users
- Volume discount from 50 properties
- Priority support & onboarding
More than 100 properties, or an agency?
Talk to usPer property, per month · indexation calculator free · excl. VAT · indicative for early access.
Frequently asked questions
Yes, we use PSD2 security (European standard) and connect in read-only mode. We see your payments but cannot send or change anything. You retain full control.
Axenimo BV is the company behind Cynsio. We build financial tools for the Belgian real estate sector.
Cynsio automatically compares what comes in with what you expect. Late, partial, or missing payments appear immediately in your dashboard.
No. Cynsio is not accounting software. It's a tool to track rental payments clearly. You can easily export everything for your accountant.
For landlords and property managers who want a clear overview without manual tracking — from single properties to large portfolios.
Built in Belgium. Made for landlords.
Stop chasing rent. Start collecting clarity.
Connect your bank, set expected rent, and let Cynsio handle tracking, reminders and indexation — in minutes.
Request early access
We’re inviting an initial group of landlords and property managers to get early access and help shape Cynsio based on real-world workflows.