Guides / Basics
What is EOSL? End of Service Life explained
End of Service Life (EOSL) is the point at which a vendor no longer offers any support for a product — no updates, no spare parts, no maintenance contracts. Understanding the terms and the lifecycle lets you plan instead of react.
The terms: EOL, EOS, EOSL
Vendors use the abbreviations differently, but a typical product lifecycle has three milestones:
- End of Life / End of Sale (EOL): the product is no longer sold. Support usually continues for years.
- End of Support (EOS): regular updates and standard support end; extended (paid) support is often still available.
- End of Service Life (EOSL): the final cut — the vendor no longer offers any support, patches or maintenance contracts.
What happens after EOSL?
The hardware works the day after EOSL exactly as it did the day before — the date is a commercial decision by the vendor, not a technical defect. What changes is the risk profile: security vulnerabilities are no longer patched, vendor spare parts become scarcer, and compliance requirements (e.g. in regulated industries) demand a documented approach to unsupported systems.
Important: many devices are technically mid-life at EOSL. Enterprise servers and switches are designed for 10-15 years of operation, while vendor support often ends after 5-7 years.
The four options at a glance
After support ends there are four realistic paths:
- Vendor renewal (if still possible): the most expensive option, often tied to a forced hardware refresh.
- Third-party maintenance (TPM): independent providers keep maintaining the hardware — typically 30-70 % below the vendor price, even after EOSL.
- Extended security programmes (software): e.g. Windows ESU — security updates for a fee during a transition period.
- Replacement / migration: sensible when performance, power consumption or software requirements call for a change anyway.
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Request a free EOSL auditFrequently asked questions
Am I allowed to keep running hardware after EOSL?
Yes. EOSL is not a shutdown, it is the end of vendor support. What matters is consciously managing security and failure risks — for example through third-party maintenance with an SLA and spare-parts supply.
Is EOSL the same as End of Life?
No. End of Life (EOL) usually only marks the end of sales. EOSL is the later, final point from which there is no vendor support at all.
Where do the dates in the EOSL365 database come from?
From official vendor announcements, synchronised daily. The vendors' original notices are always authoritative.