ManageEngine ServiceDesk Plus is available in three licensing models: (1) Perpetual - one-off license plus annual AMS, (2) Subscription - per agent/year OpEx fee, (3) Cloud (SaaS) - zero infrastructure, subscription per agent/year. The question: which model to pick? The answer depends on budget, infrastructure and scale. In this article I show TCO for each model and when to pick which.
Note on pricing. This article does not give specific license amounts - ManageEngine pricing depends on edition, number of technicians, selected modules and FX, and is updated periodically. Current prices should be confirmed with the vendor (manageengine.com) or with an implementation partner. Below we focus on cost structure and the logic of choosing a model.
Perpetual - one-off cost, full control
Model: A perpetual license purchased once plus an annual AMS fee (Annual Maintenance & Support), which at ManageEngine is typically around 20% of license value per year and covers updates and support. The software becomes the company's property.
TCO components: one-off license + AMS for subsequent years + cost of your own on-premise server infrastructure and its maintenance.
When: companies with stable, predictable scale, with a CapEx budget, that want to keep data on-premise and have the resources to maintain a server.
Subscription - flexibility, OpEx model
Model: subscription fee per technician (usually billed annually), no large upfront expense, with flexible scaling of technician count up and down.
TCO components: annual subscription per technician; in the on-premise variant add the cost of your own infrastructure.
When: MSPs, startups and companies with variable scale that prefer an operating cost (OpEx) over a one-off expense.
Cloud (SaaS) - no infrastructure to maintain
Model: SaaS subscription - the vendor handles servers, updates and backups. Access to features available only in the cloud.
TCO components: annual subscription per technician; no own infrastructure or administration cost.
When: startups, distributed teams, companies without an in-house infrastructure team that want a fast start and the latest features without ops work.
How to calculate TCO - model comparison
| Model | Upfront cost | Recurring cost | Infrastructure | When to pick |
|---|---|---|---|---|
| Perpetual | High (one-off license) | AMS per year (~20% of license value) | Own server + maintenance | Stable scale, on-prem, CapEx budget |
| Subscription | Low | Annual subscription per technician | Cloud or own server | Variable scale, OpEx preference |
| Cloud SaaS | Low | Annual subscription per technician | None (vendor-managed) | Fast start, no IT ops team |
Decision logic. In the perpetual model you pay a high upfront cost, but in the longer horizon (several years) the recurring cost narrows to AMS - for companies with stable scale this can be favorable. Subscription and cloud spread the cost across annual installments and give flexibility, at the cost of not "owning" the software. To compare models fairly, add up all TCO components over your chosen horizon (e.g. 3-5 years) at the vendor's current prices - we are happy to help with such a calculation.
Which model for which situation
Small MSP / startup with a handful of technicians: cloud or subscription are usually more favorable - low entry cost, flexible scaling, no server cost or maintenance.
Larger company with stable scale (e.g. a manufacturing plant with existing on-premise infrastructure and a CapEx budget): in the longer horizon the perpetual model often comes out better, since after the initial spend the main recurring cost is AMS.
FAQ
How does perpetual differ from subscription?
Perpetual is a one-off purchase of a perpetual license plus an annual AMS fee (typically ~20% of license value) for updates and support. Subscription is a fee billed cyclically (usually annually) per technician. Perpetual means a higher upfront expense, subscription spreads the cost over time and offers more flexibility.
Can I move from perpetual to cloud?
Migration is possible, but it usually requires a separate cloud license and data transfer - it is not an automatic upgrade. If you are considering cloud, it is worth factoring that direction in at the model selection stage.
Perpetual or subscription for a small helpdesk?
With a small number of technicians, subscription or cloud usually give a lower entry barrier and more flexibility. Perpetual starts to look attractive at larger and stable scale, when the company plans to use the system for many years.
Which model for an MSP?
For MSPs, cloud is often the most convenient - quick scaling and no infrastructure to maintain. The final choice depends on the billing model with your customers and the preference for CapEx vs OpEx.
Which model should you start with?
Rotech Group will run an audit - which model fits your scale and budget best.
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