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Introduction: A Quiet Revolution Nobody Expected
For more than a decade, many technology analysts believed that browser-based productivity belonged to Google. Google Sheets became synonymous with free online spreadsheets, especially among students, startups, and casual users. Microsoft Excel, meanwhile, was often viewed as the heavyweight desktop application reserved for professionals who needed advanced formulas, financial modeling, and enterprise-level analysis.
Yet beneath the surface, Microsoft was quietly executing one of its most successful long-term strategies. Instead of chasing headlines, the company invested billions into cloud infrastructure, web technologies, and artificial intelligence. Those investments, made years before AI became the center of the tech industry, are now producing measurable results.
According to Brian Jones, who leads Microsoft’s Excel Product Group, Excel on the web has increased its session count by an astonishing ten times over the past six years. It is a milestone that challenges the widespread belief that Google Sheets had permanently won the online spreadsheet market. More importantly, it demonstrates how patient engineering, cloud-first development, and continuous investment can reshape a product’s future long after public attention has shifted elsewhere.
Excel on the Web Records Massive Growth
Brian Jones recently revealed on X that Excel on the web has experienced a 10x increase in session count over the last six years. This remarkable growth was not accidental. According to Jones, it was the direct outcome of a strategic funding shift that Microsoft initiated roughly eight years ago to make the web version of Excel approach the capabilities of its desktop counterpart.
Session growth is far more meaningful than simple user registrations. A session represents real activity where users open workbooks, edit data, perform calculations, collaborate, and remain engaged within the application. This suggests Excel on the web is no longer just an emergency backup for desktop users. Instead, it has evolved into a preferred workplace for millions of people who choose the browser experience every day.
The achievement becomes even more impressive considering that Google Sheets has long dominated discussions surrounding browser-based productivity tools.
The Cloud Strategy That Changed
The foundation for today’s success can be traced back to Microsoft’s historic corporate restructuring in 2018.
CEO Satya Nadella fundamentally changed
At that time,
Azure cloud services were growing at extraordinary rates, Office 365 subscriptions continued expanding rapidly, while Windows revenue showed signs of slowing. Rather than protecting legacy products, Microsoft redirected talent and funding toward businesses demonstrating stronger long-term growth potential.
Excel on the web became one of the unexpected winners of this strategic transformation.
Instead of simply porting desktop features into browsers, Microsoft rebuilt much of Excel’s architecture to work efficiently in a cloud-native environment connected with OneDrive and Microsoft’s expanding ecosystem.
Years later, that investment is producing measurable returns.
Excel on the Web Is Free, But Many Users Still Don’t Know
One of
Many people still assume Google Sheets is the only major free spreadsheet platform available online.
In reality, Excel on the web has been completely free for years with nothing more than a Microsoft account. Users can even create a new workbook instantly using the simple excel.new shortcut, automatically saving files into OneDrive without purchasing Microsoft Office.
Google deserves credit for establishing the public perception of “free online productivity” long before Microsoft embraced cloud services. That branding advantage continues today.
However, the feature gap between the two platforms has narrowed significantly.
Although Google Sheets still launches slightly faster in many cases through sheets.new, Excel on the web increasingly offers a richer spreadsheet environment that appeals to users already familiar with desktop Excel.
Microsoft’s AI Future Is Being Built Inside Excel
While cloud infrastructure fueled Excel’s growth, Microsoft’s future ambitions now revolve around artificial intelligence.
Brian Jones has repeatedly described Excel as becoming an intelligent computational platform where AI assists users instead of replacing them.
Microsoft recently unveiled numerous Copilot capabilities aimed specifically at finance professionals.
These include intelligent workflow automation, specialized Copilot skills for recurring financial tasks, advanced financial data connectors from services like FactSet, Morningstar, and PitchBook, as well as a new planning mode that transparently previews every formula and spreadsheet modification before execution.
This trust-first design is particularly important in financial environments where a single incorrect formula can have significant business consequences.
To strengthen credibility, Microsoft has even collaborated with the Financial Modeling Institute to benchmark Copilot against real-world financial modeling scenarios.
The strategy reflects
Copilot Still Faces User Experience Challenges
Despite
Earlier implementations introduced a floating Copilot button directly inside Word, Excel, and PowerPoint. Unfortunately, Excel users quickly complained because the floating interface frequently covered spreadsheet cells and interfered with workflows.
Although
The incident highlights a recurring challenge across the AI industry.
Building powerful artificial intelligence is only part of the problem.
Integrating AI naturally into existing workflows without disrupting productivity is often even more difficult.
Cloud Investments Delivered Results. Will AI Do the Same?
Microsoft’s cloud strategy now stands as one of the company’s greatest business successes.
Azure generates tens of billions of dollars every quarter, while Microsoft Cloud revenue continues reaching record levels. Excel on the web’s rapid growth serves as another example of how long-term infrastructure investments can quietly transform mature software.
Artificial intelligence now represents
The
However, revenue projections alone do not guarantee widespread adoption.
Industry observers have questioned whether Microsoft can achieve mainstream AI usage comparable to the explosive success of Azure.
Some former Microsoft executives have even argued that the company risks repeating previous missed opportunities seen during the early internet and smartphone eras.
Reports suggesting relatively modest paid Copilot adoption among Microsoft 365 users continue fueling that debate.
Meanwhile, Microsoft has also adjusted parts of its AI branding strategy, quietly reducing emphasis on the Copilot+ PC label while extending several exclusive AI capabilities to older NVIDIA RTX graphics hardware.
These decisions illustrate how quickly
Why
Excel’s remarkable growth represents something much larger than a spreadsheet application becoming more popular.
It demonstrates that long-term technology leadership often depends less on dramatic product launches and more on sustained engineering investments that remain invisible for years.
The browser has evolved from a lightweight companion into a legitimate professional workspace.
Organizations increasingly expect productivity software to function seamlessly across desktops, laptops, tablets, and mobile devices while maintaining identical documents through cloud synchronization.
Excel on the web now occupies that role more effectively than many expected.
Rather than replacing desktop Excel, it complements
Its growth also validates Satya Nadella’s philosophy that Microsoft’s future lies in cloud services supported by intelligent software instead of relying solely on traditional operating system dominance.
Deep Analysis:
Microsoft’s Excel story illustrates how enterprise software evolves through infrastructure rather than marketing. The company did not attempt to outperform Google Sheets overnight. Instead, it spent nearly a decade modernizing backend services, improving browser rendering engines, optimizing cloud synchronization, and gradually bringing desktop-level functionality online.
This slow transformation mirrors
From a technical perspective, cloud-native applications increasingly depend on distributed services, scalable APIs, low-latency synchronization, and AI-assisted computation. Excel’s browser performance improvements likely came from years of optimization across Microsoft’s global cloud infrastructure rather than isolated feature additions.
Developers can observe similar architectural trends through modern cloud tooling:
Monitor Microsoft Azure CLI az login az account show
Check cloud resources
az group list
Clone Microsoft documentation
git clone https://github.com/MicrosoftDocs/azure-docs.git
Monitor Docker containers
docker ps -a
Kubernetes cluster overview
kubectl get nodes
View system resource usage
top
Monitor network connections
ss -tulnp
Inspect running services
systemctl list-units --type=service
Check disk performance
iostat -xz 1
Monitor memory usage
free -h
Review journal logs
journalctl -xe
Test network latency
ping microsoft.com
Benchmark storage
fio –name=test –rw=read –size=1G
Verify TLS connectivity
openssl s_client -connect microsoft.com:443
The AI transition introduces an entirely different challenge. Unlike cloud computing, AI success depends not only on infrastructure but also on trust. Users must believe generated formulas, calculations, summaries, and recommendations before integrating them into financial decisions.
Microsoft’s decision to introduce explainable AI inside Excel is therefore strategically important. Showing users which formulas will change before execution creates transparency that enterprise customers demand.
Google continues leading in simplicity and accessibility, while Microsoft increasingly focuses on professional-grade productivity enhanced by AI.
Whether that differentiation becomes a lasting competitive advantage depends largely on how well Copilot integrates naturally into existing workflows rather than interrupting them.
If Microsoft successfully balances automation with transparency, Excel may become not just the world’s most powerful spreadsheet but also one of the first mainstream AI-native productivity platforms trusted by professionals.
The broader lesson extends beyond spreadsheets. Technology companies frequently face criticism for investing billions before obvious results appear. Excel on the web demonstrates that infrastructure investments often require patience measured in years instead of quarters.
Today’s AI spending may follow the same trajectory—or it may not.
Unlike cloud computing, artificial intelligence must prove its value every time a user accepts or rejects an AI-generated recommendation.
That makes AI adoption fundamentally different from cloud adoption.
Microsoft now enters the most challenging phase of its strategy: convincing users that AI deserves a permanent place inside their daily work.
Only sustained real-world productivity gains will answer that question.
What Undercode Say:
Microsoft’s announcement is significant because it shifts attention away from flashy AI headlines toward measurable product adoption.
A 10x increase in sessions indicates sustained engagement rather than temporary curiosity.
Excel on the web has quietly become a serious competitor in browser productivity.
Google Sheets still owns strong brand recognition among casual users.
However,
Organizations already invested in Microsoft 365 naturally gravitate toward Excel.
Cloud synchronization has eliminated many historical limitations.
Performance improvements appear to be the result of years of backend engineering.
This validates Satya
The timing also reflects
Windows is no longer the center of
Cloud services have become the
Excel benefited directly from this organizational shift.
Many users still underestimate how capable Excel on the web has become.
Its free availability remains surprisingly unknown.
Microsoft’s marketing has not communicated this advantage effectively.
Google continues benefiting from the perception of being the default free option.
The AI roadmap introduces both opportunity and risk.
Finance professionals require absolute accuracy.
Trust is therefore more valuable than automation.
Microsoft appears to recognize this distinction.
Transparent AI workflows represent a stronger strategy than hidden automation.
The Copilot interface controversy demonstrated that usability cannot be ignored.
Even excellent AI loses value when it interrupts workflows.
Interface design matters as much as model intelligence.
Enterprise adoption will likely grow gradually rather than explosively.
Professional users prioritize reliability over novelty.
Microsoft’s partnership with financial institutions strengthens credibility.
Independent benchmarking is another positive development.
Infrastructure remains
Azure continues funding innovation across
Excel’s evolution reflects patient engineering rather than reactive development.
This story also highlights the importance of long-term corporate vision.
Strategic investments often appear expensive until years later.
Excel on the web is becoming evidence that Microsoft’s patience has paid off.
The next challenge is ensuring AI produces equally convincing results.
Cloud computing transformed
Artificial intelligence now has to prove it can do the same.
✅ Verified: Brian Jones publicly stated that Excel on the web recorded roughly a 10x increase in session count over six years, attributing the achievement to Microsoft’s long-term investment in cloud-based Excel development.
✅ Verified: Microsoft’s 2018 organizational restructuring under Satya Nadella shifted engineering priorities toward Azure, Microsoft 365, and cloud services, creating the environment that accelerated Excel on the web’s development.
❌ Not Fully Proven: Predictions that Copilot will become Microsoft’s next Azure remain speculative. While Microsoft’s AI revenue continues growing rapidly, long-term user adoption and sustained engagement have not yet reached the same level of certainty demonstrated by Azure’s mature cloud business.
Prediction
(+1)
(-1) If Copilot fails to deliver consistently reliable results or continues introducing disruptive interface changes, Microsoft may struggle to justify its massive AI investments, allowing competitors to gain ground despite Excel’s strong cloud momentum.
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