Every piece of enterprise hardware eventually reaches the point where the manufacturer's support contract either costs more than it's worth, or isn't offered anymore. Third-party maintenance exists for that gap.
The basic difference
Manufacturer (OEM) support comes directly from the company that built the hardware — Cisco, Dell, HPE, and so on. Third-party maintenance (TPM) comes from an independent provider who stocks parts and provides break/fix support for that same hardware, usually at a lower cost, and often for hardware the OEM has already stopped supporting.
Why OEM support gets expensive with age
Manufacturers generally price support contracts to encourage refresh cycles — renewal pricing tends to climb as hardware ages, and at some point the OEM declares "end of service life," after which no amount of money buys official support. TPM providers aren't bound by that same incentive structure, so pricing stays more stable over a longer hardware lifespan.
What TPM typically covers
Hardware break/fix support: diagnosing a failed component and replacing it, usually within a defined service-level window. It generally does not cover software licensing, firmware updates tied to OEM accounts, or features that require an active OEM software subscription — those stay separate, and a TPM provider should be upfront about where that line falls for your specific hardware.
Signs it's worth evaluating
- Your OEM renewal quote jumped significantly from the prior term
- The hardware has been declared end-of-service-life by the manufacturer
- You're planning to keep the hardware running for another 2–3+ years regardless
- You have a mixed fleet where some gear is mission-critical (keep on OEM support) and some isn't (candidate for TPM)
What it doesn't mean
Moving to TPM doesn't mean your hardware is unsupported or risky — it means support is coming from a different, often more cost-effective source. Plenty of organizations run a mixed strategy: OEM support on newer, critical infrastructure, and TPM on everything else.