Molnify

What it is

Molnify is a web app builder that turns Excel and Google Sheets models into secure web applications. The company's site states it has been turning spreadsheets into software since 2016 and that Molnify has been used to build over 16,000 apps for more than 15,000 users. The same page names Telia, Vattenfall and If, Lund University Hospital, and government agencies from the Nordics to South Africa as organizations running production tools on it. The company's contact address is in Stockholm.

The site's argument is that most AI app builders answer a prompt by writing code, so the logic that decides a price or a forecast ends up where only a developer can check it. Molnify keeps the logic in a spreadsheet that anyone on the team can open and read, with the JavaScript, CSS, SQL and actions that power the app living in the same file. When a number is questioned, a team member can open the Excel file, find the cell, correct the formula and upload it again, without re-prompting the AI or reading generated code.

What you build and how

Molnify supports three ways to build: using the AI App Builder (describing the app in plain language and letting the AI build the model), building the model yourself in Excel (using spreadsheet formulas you already know), or uploading a Google Sheets model.

When building with AI, the builder describes the application in plain language (either in a terminal using Claude Code or any AI agent with the free Molnify App Builder skill, or on the hosted App Builder web interface available since September 8, 2026). The AI builds the application on Molnify and returns 2 things: a live web app the team can use in the browser, and the Excel file holding its logic, owned by the builder to open and read.

When building in Excel, builders create their models using spreadsheet formulas they already know, mark cells using Molnify's color conventions, and upload the file. Molnify converts it into a working web application in minutes. This is how most Molnify apps are built.

Applications support over 200 Excel and Google Sheets functions directly within the spreadsheet, which the site says is most of what business models use. Data sits in SQL tables that grow with the app.

Application features include external API connections (to any service that supports HTTP requests), PDF and Excel output (generating reports and documents from templates), email and messaging (sending email, SMS, Slack, and Teams messages as actions), file uploads (letting users attach files as part of workflows), digital signatures (signing documents inside the app through e-signing integration), and authentication and SSO options (email and password, Google, Microsoft, SAML, or custom login).

For builders who want code-level control, the platform allows JavaScript, HTML, and CSS directly in the file.

Data structure is maintained by the builder. The logic stays as spreadsheet formulas, so ordinary Excel skills are enough to check the numbers. Applications can read and write to Google Sheets data as part of their workflow, so builders can use Google Sheets as a data source alongside Excel models.

Publishing and iteration are straightforward. Once an application is created, it can be previewed in the Lab (a private staging copy on its own address) before publishing. Builders can build, refine, and preview as much as they like, with nothing reaching users until they press Publish. When the underlying model needs changes, builders modify the file, upload it again, and the application updates instantly. Everyone using the app is on the corrected version once the file is uploaded.

The site shows Quote Studio and Meridian as live, running Molnify apps open to anyone to try. Builders can also upload their own spreadsheet and describe to the App Builder what it should look like. The company names pricing tools, ROI apps, data capture forms and what-if scenarios as the most common builds, followed by insurance and risk calculators, engineering calculations and field inspection apps.

Pricing separates two costs: building and running. Building with the App Builder draws from a pool of Molnify Credits (200 free credits for new users, small apps usually taking 100 to 200 credits depending on complexity). Running a finished app costs a per-app monthly fee with unlimited users on every tier. The home page says "From 99 EUR per app per month. Unlimited users, never per seat." The company says most apps run on a Standard subscription, and that advanced features like the AI-prompt action or file uploads can change the price. Credits do not expire. Per-model rates can change with AI provider pricing, applied from the next billing period with an email first. New customers start with a 14-day free trial where they can build as many apps as they want.

Claims, plans and customers

The home page positions the product in one line: "Molnify turns both Excel files and Google Sheets models into web applications." It describes 3 ways in: "Describe it to the App Builder, upload a model you already use, or build it yourself in Excel. Either way the logic stays as spreadsheet formulas, so ordinary Excel skills are enough to check the numbers."

On the AI route, the company's blog post says the builder can be "an agent like Claude Code" with the company's free, open App Builder skill added, or a hosted App Builder that is "just a chat box on our site". The post says the hosted version has been open to everyone since 8 September 2026 and that the skill is free and open source at github.com/molnify/molnify-app-builder-skill. Either way you get back "a live web app your team can use in the browser, and the Excel file that holds its logic".

The contrast with other builders is stated plainly on the home page: "Most AI builders answer a prompt by writing code." The blog post makes the same case. It also says the app's owner can download the exact Excel model the app runs on, straight from the app, while end users only use the app.

Scale and history, as the company states it: "Molnify has been turning spreadsheets into real software since 2016", with "over 16,000 apps for more than 15,000 users", and production tools for "Telia, Vattenfall and If", for Lund University Hospital, and for government agencies from the Nordics to South Africa. The home page also lists "models inside the EU" among the things it combines.

Pricing and limits, from the home page: "14-day free trial", "200 free credits", "No credit card", and "From 99 EUR per app per month. Unlimited users, never per seat." Its FAQ explains that "Building with the App Builder draws from a pool of Molnify Credits you own" and that "a small app, like an ROI app, usually takes between 100 and 200 credits depending on complexity." Credits never expire. Per-model rates can change if the AI providers change theirs, applied from the next billing period after an email. After the trial "you pay only for the apps you keep online." The FAQ adds that unlimited users are included on every tier, "so ten people and a thousand cost the same." The blog post adds that most apps run on a Standard subscription and that features like the AI-prompt action or file uploads can change the price; the per-app tiers themselves sit on a separate plans and pricing page.

Security and data handling, from the home page and FAQ: the platform runs on Google Cloud in Western European data centers, communication between the browser and the servers is encrypted, and row-level access control decides which rows each user may see. Login options include Microsoft (Entra ID) and SAML single sign-on, or no login at all for an open app. The FAQ says that under GDPR the customer is the data controller and Molnify is the processor, that customer data is never used to train AI models, and that you can export it if you leave; procurement paperwork is sent on request. For AI builds you pick the model before you start: the FAQ names Gemini, GLM and Kimi as running inside the EU and Claude as the one that runs outside it, and advises building with made-up numbers before pointing the finished app at real data. The spreadsheet itself stays on the server, so end users get the interface and never the formulas behind it.

Features, from the home page: more than 200 Excel and Google Sheets functions; external APIs through HTTP requests; PDF and Excel output from your own templates; email, SMS, Slack and Teams messages as actions; file uploads; digital signatures through an e-signing integration; sign-in by email and password, Google, Microsoft and SAML, or your own login; and JavaScript, HTML and CSS directly in the file. Every build previews in the Lab, "a private staging copy on its own address", and "nothing reaches your users until you press Publish."

On Google Sheets, the FAQ says: "Molnify turns both Excel files and Google Sheets models into web applications, and apps can read and write Google Sheets data as part of the workflow." People using an app do not need Excel.

Who it suits and who it does not

Molnify suits teams whose business logic already lives in a spreadsheet: pricing tools, ROI calculators, what-if scenarios, insurance and engineering calculations. The company's pitch is that a finance or operations person who knows Excel can read and check every formula behind the app, and that the file stays theirs whichever AI built it. The flat per-app price with unlimited users also suits an app that many customers or colleagues will open, since the bill does not climb with headcount.

It fits teams that want AI speed but need to explain a number to a colleague, a client or a CFO. The company's point is that the owner can open the actual spreadsheet behind the app at any time, while the people using the app only see its interface.

There are caveats. The logic stays in Excel formulas, so the approach asks for some spreadsheet skill even when the AI writes the model. Pricing is per app, so a team with many small apps will pay for each one it keeps online, and the home page's 99 EUR is a starting figure rather than a fixed price. The credit rates for AI builds can change with the providers' prices. A builder who wants a drag-and-drop canvas rather than a spreadsheet model will find a different working style here. The FAQ also notes that the 200+ supported functions are most of what business models use but not every function Excel has, with the Molnify Reference listing which ones work.