The data from 2025 and early 2026 tells a clear story: migration volume is accelerating.
Atlassian is sunsetting Data Center on a fixed timeline, and the organizations getting ahead of it are the ones pairing Atlassian’s FastShift program with an experienced Solution Partner. The question for most Atlassian customers is no longer whether to migrate to Cloud — it’s how to do it without disrupting the business.
Here’s what the numbers actually show.
By the Numbers: 99% of Atlassian Customers Are on Cloud
In September 2025, Atlassian announced that 99% of its 300,000+ customers have a footprint in the Cloud. Nearly all new customers now choose Cloud from day one.
That’s a remarkable number — and it matters to organizations still on Data Center for a simple reason: Atlassian’s product development is following its customer base. When 99% of your customers are on one platform, that’s where engineering investment, new features, and support resources go. Data Center is being maintained until its end-of-life date. It is not being grown.
For context on the enterprise dimension: more than 80% of the Fortune 500 are Atlassian customers. Cloud at enterprise scale is no longer an experiment — it’s the established pattern.
Cloud Revenue Growth: A Signal Worth Paying Attention To
Atlassian’s financial results give a useful lens on how fast this shift is happening:
- FY25 cloud revenue: $3.45 billion, up 26% year-over-year
- Total FY25 revenue: $5.2 billion, up 20% year-over-year
- DC-to-Cloud migrations in FY25: up over 60% from the prior year
- DC-to-Cloud migrations in Q1 FY26: more than doubled compared to the same period last year
- Customers with >$10K in Cloud ARR: 51,978 — up 13% year-over-year
Sources: ( Atlassian Q4 FY25 earnings, Q4 FY25 earnings call transcript, and Q1 FY26 Shareholder Letter)
The doubling of migration volume in a single quarter isn’t just a product trend — it reflects organizations making a real business decision under real time pressure.
The Data Center Timeline: Fixed Dates, Real Consequences
Atlassian’s Data Center end-of-life roadmap is worth having in front of you:
- December 2025: Atlassian stopped accepting new Marketplace app submissions for Data Center
- March 2026: New customers can no longer purchase Data Center subscriptions or associated Marketplace apps
- March 2028: Existing customers can no longer purchase new licenses, expansions, or Marketplace apps for Data Center
- March 2029: Full end of life — all Data Center subscriptions expire and instances become read-only
On top of the timeline, Data Center list pricing increased 15% in February 2026, with advantaged pricing up approximately 20-40% to be brought to list price. The cost trajectory for staying on Data Center is moving in one direction.
None of this is a surprise. Atlassian has been signaling this direction since the Server end-of-support in February 2024. But the March 2029 hard deadline means organizations now have a defined window, not an open-ended timeline.
Why Enterprise Teams Are Moving Now (Not Just Because of the Deadline)
The deadline is a factor, but it’s not the only one driving migrations. Several converging reasons are pushing enterprise teams to act:
Cloud-only AI capabilities. Rovo, Atlassian Intelligence, and the broader AI feature set are available exclusively on Cloud. Atlassian added more than 1,000 Cloud-exclusive features in 2024 alone, with approximately 8,000 deployments per month. Teams that want access to Atlassian’s AI roadmap have to be on Cloud to get it.
Scale that wasn’t there before. A common historical objection was that Cloud couldn’t handle large enterprise instances. That’s changed. Confluence Cloud now supports single sites with up to 150,000 users; Jira Cloud supports up to 100,000 users per site.
The compounding cost of staying. Between pricing increases, diminishing Marketplace app support, and the approaching EOL, the total cost of remaining on Data Center is rising each year — while Cloud pricing has held relatively stable for teams migrating proactively.
Need help convincing your boss to migrate sooner rather than later? Here are our tips for building the internal business case for cloud.
FastShift + Solution Partner: Your Move to Cloud
Atlassian’s FastShift program was built to address the single biggest reason enterprise migrations stall: timeline complexity. FastShift reduces migration timelines from the traditional 12–16 months down to 2–6 months. In Atlassian’s Q1 FY26 pilot, nearly 500,000 users accelerated their migrations through the program. One example: Expedia migrated 30,000 seats from Data Center to Cloud in three months.
Here’s how to estimate your cloud migration timeline.
FastShift is a significant unlock — but it works best when paired with an experienced Solution Partner who knows your environment.
Here’s why: FastShift handles the velocity. A Solution Partner handles the complexity. Most enterprise instances that have been running on Data Center for years carry accumulated weight: custom permission schemes, integrations, Marketplace apps with varying cloud compatibility, data residency considerations, and configurations built for a specific deployment model. FastShift won’t audit those for you. It accelerates the migration path once you know what that path is.
Working with a partner like Seibert means starting with a structured Cloud Migration Assessment: mapping your current environment, identifying what migrates cleanly, what needs to be rebuilt or replaced, and what requires compliance review before anything moves. That assessment becomes the foundation for a FastShift-eligible migration plan — so you get the speed benefit without inheriting problems on the other side.
The organizations getting the best outcomes in 2026 are the ones using both: Atlassian’s migration tooling and a Solution Partner who has guided complex enterprise migrations before.
Where Organizations Still Get Stuck
The migration blockers that exist today are real, even if they’re less common than they were two years ago:
- App compatibility. Not every Marketplace app has a Cloud equivalent. Auditing your current app stack before migration is a non-negotiable first step — discovering a critical app has no Cloud equivalent mid-migration is the kind of problem that derails timelines. See our step-by-step guide to auditing your Marketplace apps before migrating.
- Data residency and compliance. Organizations in regulated industries — healthcare, financial services, government-adjacent work — often have specific requirements around where data lives. Atlassian has made significant progress on data residency options, but compliance review needs to happen early.
- Heavily customized instances. Large Data Center instances with years of configuration debt take more planning, not more speed. This is where the assessment phase matters most.
None of these are migration-stoppers in most cases. They’re planning requirements. The teams that treat them as upfront work rather than last-minute surprises are the ones that hit their go-live dates.
What 2026 Looks Like for Data Center Teams
The data points to a clear window: migration volume is doubling quarter-over-quarter, Atlassian’s tooling for enterprise migrations is more mature than it’s ever been, and the cost and feature gap between Data Center and Cloud is widening with each product cycle.
The organizations that act in 2026 have more options — and more Marketplace app coverage — than the ones waiting until 2028. That gap only grows as the EOL date approaches and the Data Center ecosystem continues to wind down.
If you’re on Data Center and evaluating your options, a Cloud Migration Assessment is the right starting point. It gives you a clear picture of your environment, a realistic timeline, and a plan that pairs Atlassian’s FastShift program with hands-on support through the complexity.
Start your Cloud Migration Assessment with Seibert.