Two things make KeyProxy worth a look, and neither is the pool size.
The first is that it runs as a marketplace, with both buying and selling. The second is a feature called MultiPort, which addresses the most common frustration with mobile proxies.
What MultiPort Solves
Buy a mobile proxy anywhere and you typically get one address, on one port, usable by one thing at a time.
That is fine until you want to run several accounts or several tools through the same carrier connection, at which point you are either buying more proxies than you need or queueing your own work.
MultiPort splits one mobile connection across several ports, so multiple sessions can use it independently. You are paying for one SIM and getting genuine parallel use out of it.
For anyone whose mobile proxy bill has crept upward because they kept buying another one, this is the feature that stops the bleeding.
The Marketplace Angle
KeyProxy operates as an exchange, not only a shop. You can buy mobile proxies, and you can sell capacity into it.
Two things follow from that. Supply is not limited to what one company can build, which usually means better availability and competitive pricing. And the sourcing model is visible rather than buried, which is more than most residential providers manage.
If you already run mobile devices for your own work, the selling side turns idle capacity into something that offsets the cost.
Weekly and Monthly Rental
Pricing is published by the week and by the month, at figures that are modest by mobile proxy standards.
Weekly rental deserves credit. Mobile proxies are the most expensive category in this business, and being able to test one for a week rather than committing to a month lowers the cost of finding out whether carrier addresses solve your problem.
There is also a free test, which is the right way to sell something this specific.
Uptime Published Per Location
The site shows uptime figures against specific locations rather than a single site wide average, which is unusually granular.
An average across every location tells you nothing about the one you actually need. Per location figures let you check the place you care about before paying for it.
Who It Fits
KeyProxy suits anyone running multiple accounts through mobile addresses, users who want to test mobile proxies for a week rather than a month, operators with spare capacity to sell, and work focused on Eastern European geography.
Who Might Look Elsewhere
Location coverage is concentrated rather than global. If you need mobile addresses across many countries, a provider with a worldwide carrier footprint is the better fit.
Much of the site is in Ukrainian and Russian, with English available. If you want a fully English experience with English support at all hours, factor that in.
Final Verdict
KeyProxy is a focused, well featured mobile proxy operation with a genuinely useful piece of engineering behind it.
MultiPort makes one mobile connection do the work of several, the marketplace model keeps supply and pricing honest, weekly rental makes testing cheap, and per location uptime figures let you verify before buying.
Take the free test on the location you actually need, then try MultiPort with two or three parallel sessions, checking each one with our proxy checker so you know the ports are genuinely independent. If it holds up, you have just reduced how many mobile proxies you need to rent.
