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@RISK
ModelRisk
Analytic Solver
Audit, trace and stress-test confidential Excel financial models in your desktop browser. The workbook, its formulas and its numbers never leave your computer.
Website, pricing, platforms and company facts side by side.
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| Website | reactionic.github.io | fundquill.com |
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| Platforms | — | |
| Company | — | 2026 |
| Listed in |
In their own words, as submitted to SaaSHub.


No description of React-Ionic yet.
Every model you open in FundQuill stays on your own computer. The audit, the tracing and every recalculation happen there, so the workbook, its formulas and its numbers are never sent to a server, and we never receive them. For M&A advisors, VC and private equity associates, real estate...
What each product offers, as listed by its team.


Possible disadvantages
How often each product is chosen within a category, 0–100% relative to the other.


As answered by people managing React-Ionic and FundQuill.
FundQuill's answer:
Boutique M&A advisors, VC and private equity associates, real estate analysts, and fractional CFOs and finance consultants, typically in firms of one to fifty people. The common thread is that they check Excel models they are not allowed to put into a cloud tool: a pre-close LBO, a cap table, a development pro forma, a board model.
FundQuill's answer:
FundQuill never uploads your model. The audit, the formula tracing, the what-if recalculation and the Monte Carlo runs all happen on your own computer, inside the browser you already have. That is how the product is built, not a policy setting. There is no upload step to opt out of.
For a deal team, that removes the question of whether a pre-close model can go into a cloud tool at all. It also means the work you hand over can be checked: a Pro report is signed on your device, and the person who receives it can confirm, for free and without an account, that it has not been altered and which device signed it.
FundQuill's answer:
Against cloud spreadsheet and planning tools, your workbook simply never leaves your machine, so the confidentiality question does not come up.
Against the Excel add-ins for model auditing and simulation, there is nothing to install, which matters on a managed work laptop where adding software means an approval process. FundQuill also keeps the audit, the tracing, scenarios, sensitivity tables and Monte Carlo in one place, and its report can be checked by the recipient with a free tool, including an open-source checker that runs offline.
The free tier is a working auditor, not a trial: no account, no card, and no time limit.
FundQuill's answer:
FundQuill started from a narrow observation: the financial models that most need a second look are the ones that cannot be uploaded anywhere. A pre-close LBO or a cap table under NDA cannot go into a cloud spreadsheet or a chatbot, and many of the established checking tools are Excel add-ins, which a managed work laptop often will not let you install.
So we built a model auditor that runs in the browser but does all of its work on your own machine. It finds broken formulas and circular references, shows how every number is built, and recomputes the model under your own assumptions. Pro adds simulations and a signed report, so the review you hand over can be checked rather than taken on trust.
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