Key points
- In the worked example, staying costs about $1.4M a year rising at 9% while switching runs $770,000 a year after $1.66M in one time cost, crossing just past month 38; walking into the renewal with that chart, if it moves the incumbent even 5% on a $1.4M run rate, is $70,000 a year for the price of one memo.
- In one worked example, staying costs roughly 1.4 million a year rising at nine percent, while switching runs about 770 thousand a year at three percent but carries 1.66 million in one time cost.
A number, not a gesture
The credible alternative builder starts from the incumbent contract and names the realistic competitors for that vendor, drawn from a curated registry covering the flagship families where a switch is genuinely on the table, Microsoft, Salesforce, Oracle, SAP, Workday, ServiceNow, Broadcom, and their peers. For each, it estimates the economics that actually decide a switch: the price ratio against your current spend, the implementation cost, how long you would run both systems in parallel, and the per seat cost of retraining.
Those inputs are not the vendor's marketing. They are planning defaults you can see and override, each one shown with its source and method, so the alternative is a model you control rather than a claim you inherit. Change the parallel running period or the retraining cost and the whole case recomputes in front of you.
app.isvcosell.com/contracts/alternative
The incumbent against realistic competitors, with every switching assumption visible and adjustable.
THE SAME JOB, TWICE
TODAY, BY HAND
You tell the vendor you are evaluating alternatives, without a named competitor or a costed migration behind the claim.
An analyst builds a switching model in Excel from the competitor's marketing pages, guessing at implementation cost and parallel running.
The retraining and migration assumptions get challenged internally, and nobody can say where the numbers came from.
The rep asks which alternative and what it would cost to move, and the bluff collapses on the second question.
Days of modelling for a threat that folds in one meeting
WITH ISVCOSELL
Open the credible alternative builder from the incumbent contract; it names realistic competitors from a curated registry of the flagship families.
Review the planning defaults, price ratio, implementation cost, parallel running, per seat retraining, each shown with its source, and override any of them.
Read the sixty month stay versus switch curves and take the break-even month, the point where staying overtakes leaving.
Export the memo, grounded and citation tagged, or accept the honest verdict that no credible alternative exists and use the leverage it surfaces instead.
About 30 minutes to a defensible break-even month
What changes: days of guesswork modelling become half an hour to a number the vendor has to answer. In the worked example, staying costs about $1.4M a year rising at 9% while switching runs $770,000 a year after $1.66M in one time cost, crossing just past month 38; walking into the renewal with that chart, if it moves the incumbent even 5% on a $1.4M run rate, is $70,000 a year for the price of one memo.
PART TWO
The break-even month is the whole argument
A one time migration cost and a lower run rate do not tell you whether to switch. The question is when the saving overtakes the cost of moving. So the builder draws two cumulative curves over sixty months: the cost of staying, compounding at the incumbent's uplift, and the cost of switching, front loaded with the one time spend and then running cheaper. Where they cross is the break-even month.
In one worked example, staying costs roughly 1.4 million a year rising at nine percent, while switching runs about 770 thousand a year at three percent but carries 1.66 million in one time cost. Those curves cross a little past month thirty eight. That single figure is what you take into the room. Not "we might leave," but "we are past break-even on the alternative in your third year, so your renewal number has to beat that math." It reframes the conversation from loyalty to arithmetic.
"A vendor does not fear that you are unhappy. A vendor fears a spreadsheet where leaving pays off in month thirty eight."
app.isvcosell.com/contracts/alternative
Stay and switch curves over sixty months. The break-even month is the number that reframes the renewal.
PART THREE
We will not build you a bluff
Not every vendor has a credible alternative, and pretending otherwise is how buyers get caught. Some products are so embedded, so specific, or so dominant that a switch is not real inside the renewal window, and a rep will expose a manufactured threat in one question. So when the vendor is not one where an honest alternative exists, the tool says so, plainly, rather than inventing a competitor to flatter you.
In that case it does something more useful than a fake threat. It surfaces the leverage you actually have, co-termination windows, timing, the parts of the estate where you do hold cards, so you negotiate from a true position instead of a bluff that collapses. A walk away you cannot defend is worse than none, because the moment it fails you have taught the vendor you have nothing.
WHAT IT NEEDS
What a credible alternative carries
1 A named competitor. Not "the market," a specific vendor a decision maker would actually consider, with its economics modelled against your contract.
2 A switching cost. Implementation, parallel running, and retraining, spread realistically, so the one time hit is honest rather than hand waved.
3 A break-even month. The point where staying overtakes leaving. This is the figure that turns a feeling into an argument the vendor must answer.
4 An honest verdict. If no real alternative exists, the tool says so and points you to the leverage you do have. A bluff that fails is worse than silence.
THE HONEST LIMIT
The model informs the nerve
A break-even chart does not make the decision for you, and the defaults are planning estimates, not a quote from the competitor. What the model gives you is a defensible starting position and the confidence to hold it, because you have actually done the arithmetic the vendor assumes you have not.
That is the real function of a credible alternative. It is rarely used to leave. It is used to make staying cost the vendor something, by proving to them that leaving would cost you less than they hoped. The memo exports as its own document, grounded and citation tagged, ready to sit quietly on the table while you talk about renewal.
About the author
Morten Andersen, Cofounder, ISVCOSELL
Morten brings two decades of enterprise and software procurement, with stints across Oracle, IBM, SAP, and Salesforce shaping how he reads a deal. He has led sourcing through hundreds of renewals, from mid market order forms to nine figure global agreements, and learned that the buyers who win are the ones who walk in knowing the market. He built ISVCOSELL to make that pattern recognition repeatable.
More posts by Morten Connect on LinkedIn →
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