OK, I admit it. I was totally drawn in by the provocative title of James Governor’s post. It was that “pathology” word that got me. According to Meriam-Webster:
pathology
- Function:
- noun
- Inflected Form(s):
- plural pa·thol·o·gies
- Etymology:
- New Latin pathologia & Middle French pathologie, from Greek pathologia study of the emotions, from path- + -logia -logy
1: the study of the essential nature of diseases and especially of the structural and functional changes produced by them 2: something abnormal: a: the structural and functional deviations from the normal that constitute disease or characterize a particular disease b: deviation from propriety or from an assumed normal state of something nonliving or nonmaterial  3: deviation giving rise to social ills pathologies…and crime
Well, it’s easy to see that I could have a load of fun with these! After all, I have a decades-long history of the gladiatorial combats that James and the linked material describes. That notwithstanding, a major point made in the article(s) centers on the inequity of the perpetual license model (sometimes incorrectly called the ‘enterprise license’ model). Presumably, the answer is software-as-a-service (SaaS) and its pay-as-you-go pricing model.
Let’s take a look at each pricing strategy, and the benefits and drawbacks of each…
Perpetual Licensing vs SaaS
Here are the characteristics of the perpetual licensing model:
The SaaS licensing model is essentially the converse:
Price – A Key Buying Criteria
How does a buyer compare prices between a perpetual license offering and a SaaS product?
The answer is to compare the total cost-of-ownership (TCO) of each. Of course, this can be tough given all the variables. But let’s make some assumptions and have at it!
Let’s assume:

In any such analysis, the duration of “current lifetime” is key. Let’s assume that P=1, and look at the results for the first three years.
As we can see, in this 3-year-timeline example, the SaaS solution is favored. This result is often the case, especially when the residual value of the perpetual license is valued at zero (as it is here).
Of course the analysis leaves out some items, such as the much-lower switching cost of SaaS, and the resultant high motivation of the SaaS vendor to provide good service and prevent churn.
What This Means for Untangle
We are big believers in the subscription model, and 100% of our offerings are available solely by subscription. Furthermore, we have tried to keep our customers’ upfront costs to a minimum, as evidenced by our ‘Re-router‘ product for Windows (soon to enter Version 2). Thus, our actual TCO advantage can more approach the ‘SaaS (best case)’ line on the chart above.
What do you think? Is our subscription-based, software-download model (much of it free) on track – or do you prefer appliances (and their up-front cost and replacement cycle)?
Inquiring minds want to know….
3 Responses on Open Source Rules, but Is Perpetual Licensing a “Pathology”?
For what you do, I think that your model works well. Different licensing models are appropriate for different products and different organizations. For companies who are paranoid about controlling their data, SaaS is a non-starter. For start-ups, things with high up-front costs don’t make sense.
How did you settle on HW cost being 25% of P? That seems… arbitrary. I’m also curious on how you decided that the monthly cost should be 1/25th of P. It seems like these comparisons would would look very different if those values were changed even just a little.
I think this would be much more interesting if numbers from actual products were used, even if the particular products were left unnamed.
@Q: Thanks for the comments.
Most of the price points are arbitrary, but not (I hope) OTL. I based them on some subscription deals that I have been involved with (including deliberations at Untangle).
Pricing usually begins with the monthly fee, so let’s begin there.
Assumed churn rate is a key input. For the model, I assumed just over 3% per month (a safe assumption). This yields a roughly two-year average subscription lifetime. If we assume that both vendors – perpetual and SaaS – want to receive the same income from their software, “1/25″ seems like a good WAG.
As for hardware, the 25% assumption is high for Untangle but low for some app’s. Of course, “hardware” has to include Internet bandwidth as appropriate.
[Note: Hardware/infrastructure/bandwidth costs are often a SaaS "dirty little secret" IMO. IOW, some pre-public SaaS vendors cover these costs up and try to recover them in other ways. The biggest offenders that I know of are the "remote storage/backup" folks (and YouTube).]
If I get a chance, I’ll write a follow-up with real-world numbers.
Bob
I think your licensing model is exactly what it needs to be. Many small businesses will not pay a massive up front cost because they just don’t have the money and they don’t see the need.
It’s hard to stress the importance of network security enough, let alone when they have to drop several thousand upfront for an appliance they don’t think they need.
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