Vendor lock-in is the cost of leaving a supplier: the money, time and risk it would take to move to something else. You measure it by listing what would have to be moved, rebuilt, relearned or renegotiated, and putting a rough score against each item.
Lock-in is not a fault in itself. Every useful system creates some. The point of measuring it is to know whether you are staying with a vendor because it is the best choice or because leaving has quietly become too hard.
The four places lock-in lives
Data. Anything you cannot take with you in a usable form: guest records, booking history, owner statements, reviews, message threads, photos, pricing rules. Test this by exporting, not by reading the feature list.
Integrations. Connections that only this vendor holds, such as links to listing channels, smart locks, cleaning schedulers, accounting and payment processing. Each one is something a replacement would need to match or do without.
Habits. Your reservations team knows where every button is. Your cleaners know the app. Owners know how to read their statements. Retraining is a real cost and it lands in your busiest months if you time it badly.
Contracts. The remaining term, the notice window, any fee for leaving early, and whether your data is returned at the end. Read your own agreement for these, and have a lawyer look at it where the amounts matter.
A simple scoring exercise
- List every system you pay for: property management system, channel manager, pricing tool, guest messaging, owner portal, accounting links.
- For each one, score data, integrations, habits and contracts from 0 (leaving is trivial) to 3 (leaving would be painful).
- For every 2 or 3, write one sentence saying exactly what the difficulty is. A score without a reason is a feeling, not a measurement.
- Add up the scores for each system, then write the yearly cost beside the total.
- Look first at systems where the cost is high and the score is low. Those are the easy decisions.
For the cost column, our software bill calculator will turn a per-unit or per-seat charge plus any flat platform fee into a yearly and a three-year total.
Dependence on a network is different from inconvenience
Some of what feels like lock-in is really dependence on a network. A listing channel brings you guests. You cannot rebuild its audience, and nobody else can either. That is not something to escape. It is something to price in and work with.
The software that sits between you and those channels is a separate matter. Ask how the connection to each channel works, who is permitted to hold it, and whether your listings, reviews and ranking belong to your account on the channel or to the software in the middle. If they belong to your own channel account, changing the software in the middle is an inconvenience. If they do not, it is a real dependence and should score a 3.
What to do with the result
A high score is a reason to reduce lock-in before you think about moving. Run a full export on a schedule. Make sure the domain, the payment processor account and the channel accounts are in your company's name. Write down how the integrations are set up. Each of those lowers the score without changing supplier, and leaves you in a better position at renewal.
A low score beside a large bill is where alternatives are worth a look. Our guide to owning your software covers switching risk and running two systems side by side. Our page for vacation rental managers sets out what managers rent and what can be rebuilt. Listing channels and card processing are not on that list: we build around them, not in place of them.