vendor lock-in → exit plan
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Storage & SAN migration path

From Pure Storage FlashArray to TrueNAS

Cost comparison, a phase-by-phase migration plan, and the automation to execute it.

Effort
Medium
Est. timeline
~15 wks
TrueNAS model
Free (Enterprise optional)
Open source
Yes
▶ Model your savings in the calculator

3-year cost calculator

Pre-filled for Pure Storage FlashArray → TrueNAS. Adjust every figure with your own numbers.

Every figure here is an illustrative estimate, not a vendor quote. Defaults are editable starting points compiled from public information; real, binding pricing comes from the vendor or an authorized distributor. See our methodology.

Sized at 500 TB usable — cost is computed on this.

Recommended for your requirements: Size for 500 TB usable at ~50k IOPS — midrange (100–500 TB). Plan redundancy (N+1), replication/DR, and snapshot capacity overhead (~20–30%).

Stay on Pure Storage FlashArray (3yr)
$127,500
Move to TrueNAS (3yr + migration)
$69,000
Projected savings
$58,500 (46%)
Payback period
18.2 mo
Build a decision report from these numbers:

All figures are illustrative and fully editable — adjust the cost-per-TB and migration inputs with your own numbers. Not guaranteed vendor pricing (defaults reviewed May 2026). For a binding quote, use the request form below to reach an authorized distributor or partner.

Quick comparison: Pure Storage FlashArray vs TrueNAS

Common trade-offs teams weigh when staying on Pure Storage FlashArray versus moving to TrueNAS. These are general, commonly-reported considerations — not statements of fact about any vendor — so check them against your own contract and the vendors' current terms.

Pure Storage FlashArray Current
Pure Storage · Evergreen subscription
  • Already in production — no migration effort or risk
  • Mature ecosystem with vendor support and SLAs
  • Evergreen subscription locks in recurring spend
  • Premium $/TB versus commodity hardware
  • Controller upgrades gated by subscription tier
  • Ongoing evergreen subscription cost to budget for
TrueNAS Planned
Open source · Free (Enterprise optional)
  • Open source — no license fees
  • No vendor lock-in
  • Cost model: Free (Enterprise optional)
  • Requires a migration (~15 weeks, medium effort)
  • Community support by default — paid support optional

Why teams evaluate alternatives to Pure Storage FlashArray

Reasons commonly cited by users and in public industry coverage for re-evaluating Pure Storage FlashArray. These are general, reported considerations — not statements of fact about Pure Storage — and may not reflect your situation or the vendor's current terms. Verify against your own contract before deciding.

  • Evergreen subscription locks in recurring spend
  • Premium $/TB versus commodity hardware
  • Controller upgrades gated by subscription tier

The migration plan

Roughly 15 weeks for a mid-size estate, in six phases.

Assessment & discovery
Inventory every workload, dependency, and integration; flag anything high-risk.
Target design & sizing
Size the new platform, design storage and networking, set RPO/RTO and rollback criteria.
Pilot migration
Migrate a small low-risk set end-to-end and validate the runbook.
↳ Create TrueNAS pools; migrate LUNs with host-side copy or replication; re-present iSCSI; validate then cut over.
Production migration
Move workloads in scheduled waves using automation; verify after each wave.
Validation & optimization
Tune performance, confirm backup/DR, and update monitoring and docs.
Decommission source
Reclaim licenses, retire old infrastructure, and capture lessons learned.

Tooling & automation

Create TrueNAS pools; migrate LUNs with host-side copy or replication; re-present iSCSI; validate then cut over.

OffVendor's wizard pre-fills these scripts with your environment — inventory export, disk/schema conversion, bulk provisioning, and validation.

Frequently asked

Is migrating from Pure Storage FlashArray to TrueNAS worth it?

For most teams facing rising Pure Storage FlashArray costs, yes — TrueNAS (free (enterprise optional)) typically lowers 3-year total cost of ownership, though the right answer depends on workload complexity and in-house skills. Use the calculator to model your own numbers.

How long does a Pure Storage FlashArray to TrueNAS migration take?

A typical mid-size estimate is around 15 weeks across six phases — discovery, design, pilot, waved production migration, validation, and decommission. Larger or more complex estates take longer.

What tools are used to migrate from Pure Storage FlashArray to TrueNAS?

Create TrueNAS pools; migrate LUNs with host-side copy or replication; re-present iSCSI; validate then cut over.

Get a vendor-accurate TrueNAS quote

A guided builder that turns your estimates into a requirements report you can send to a vendor, partner, or distributor to secure a binding quote.

How this works — and what's yours to provide
  • Your inputs, your responsibility. The figures and estimates here describe your environment and requirements — please make sure they're accurate. OffVendor's defaults are illustrative starting points only, not vendor pricing.
  • It generates a requirements report (RFQ). Use it to capture your sizing and requirements and share it with your authorized vendor / partner / distributor to obtain a final, binding quote.
  • Then close the loop on your TCO. When the real quote comes back, plug those actual prices into the calculator above to refine your TCO and see where reality differs from the estimate.
  1. 1Size it
  2. 2Requirements
  3. 3Your details
  4. 4Channels & export

How big is your Pure Storage FlashArray estate?

Sum your usable array capacity, or the total front-end data you protect. Not sure? Enter rough numbers — the distributor confirms exact counts later.

500 TB usable
Default mid-size assumption (500 TB usable)
Estimates are illustrative and configurable; production figures come from vendor list prices and your own quotes.