If you've started shopping for a storage unit, you already know the problem: every company's website says "affordable," "secure," and "convenient."
None of that tells you anything. What actually matters is unit availability in your city, whether the gate code works at 6 a.m. or midnight, and whether the price you're quoted online is the price you'll actually pay in month three.
We dug into the 10 self-storage companies with the biggest footprint across the USA in 2026 - from the publicly traded giants to a few regional names worth knowing - and broke down what each one actually does well, and where it falls short.
These were five criteria that matter: number of units sizes/types, security features (gate codes, video cameras, alarms), climate control choices, availability of flexible leases, and how these companies approach their pricing and opening/closing time policy.
Some of these companies (Public Storage, Extra Space) have thousands of locations and are huge REITs. Others (Devon, Go Store It, West Coast) are smaller regional operators that tend to compete on service and price in the markets they cover.
Public Storage is the largest self-storage operator in the country, with more than 3,000 facilities across 40 states. That scale means you can find a unit - or several unit sizes to compare - almost anywhere you live.
It offers 11 different unit sizes, which is more than most competitors, plus climate control, vehicle storage, and month-to-month leases with no long-term commitment.
Facilities are gated and fenced, though camera coverage and on-site staffing vary by location - some sites are unmanned outside office hours.
Best for: People who want the most unit-size options and the widest coverage map.
Extra Space Storage has actually overtaken Public Storage on raw location count, with over 4,000 facilities (including its Life Storage and Storage Express brands) in 42 states plus D.C.
StorageMart differs from its competition with high degree of security measures: 24/7 video surveillance, individually alarmed units, at multiple facilities, and access by code are standard amenities rather than add-ons.
Unit sizes start from small 4x4 lockers all the way up to huge 20x30 bays which can be used to store everything that you need, including your car and business equipment.
Best for: Anyone storing valuables or business inventory who wants security as a baseline, not an add-on.
U-Haul runs more than 2,100 self-storage locations across the US and Canada, and its real advantage is bundling: truck rentals, moving supplies, and storage all under one account.
Book a one-way truck rental and you can often get a free month of storage at the destination.
U-Haul's standout perk is its 1-year price lock - your monthly rate is guaranteed not to increase for your first 12 months, which is rare in an industry where self-storage operators typically build rate increases into the yearly schedule rather than locking renters in.
Climate-controlled and drive-up units are available, though you'll need to supply your own round discus lock.
Best for: Anyone moving long-distance who wants the truck rental and the storage unit handled by the same company.
CubeSmart operates more than 1,500 locations and has built its reputation on being the value pick - it's confident enough in its pricing that it invites customers to compare rates with nearby competitors.
Units start around 5x5 lockers and scale up to large rooms, with climate control, wine storage (a nice niche touch), and business storage with loading dock access at some sites.
Security is solid but less consistent than Extra Space's - camera coverage varies by facility, so it's worth checking before you book.
Best for: Budget-conscious renters who don't need premium security features at every location.
StorageMart is a family-run operator (still owned by the Burnam family after nearly 30 years) with over 250 facilities across the US, Canada, and the UK - plus it owns Manhattan Mini Storage, the go-to brand for NYC renters.
The most advantageous aspect is the access flexibility: many facilities offer 24/7 access with prior approval, which is very important in case of unusual working hours or running a business that requires after-hours access to inventory.
They feature gated facilities, individual PIN codes, and 24/7 video surveillance as part of a package.
Best for: Renters who need genuinely flexible access hours, not just "open until 9 p.m."
SmartStop runs more than 460 properties across 35 states, D.C., and Canada, and has picked up Newsweek's top ranking for storage customer service multiple years running.
Every SmartStop lease is true month-to-month - no minimum stay, no early termination fee, no short-stay surcharge. That's genuinely useful if your timeline is unpredictable: a military move, a divorce, a business in transition.
Climate control, electronic gate access, and same-day online move-in are available at most locations.
Best for: Renters who don't know exactly how long they'll need the unit.
Mini Mall Storage is an operator using the hub-and-spoke strategy: there is no facility farther than 45 minutes away from the regional management office, so that employees remain truly accessible instead of redirecting calls to the national hotlines.
They operate in around 17 US states plus several provinces of Canada.
Their standard amenities include 24/7 video surveillance, coded gate access, and drive-up units, the company has on live chat and phone support ("Storage Concierge Specialists") for anyone who wants a human answer fast.
Best for: Renters in secondary or smaller markets who want more responsive local service than a national chain typically offers.
Devon Self Storage has been operating since 1988 and now runs 200+ facilities in 32 states, plus a handful in Europe.
It's part of the Inland Real Estate Group, but it still markets itself on local expertise - each facility is staffed by people who know that specific market.
All climate controlled services, free dollies and carts and month to month lease agreements are available at most GoStoreIt facilities, along with features like 24/7 video monitoring and 7 day a week access which are available at many but not all facilities.
Best for: Renters who want to filter facilities by specific features (like 24-hour access) before committing.
GoStoreIt is a relatively new and growing company established in 2013, mainly operating in Georgia, Florida, North and South Carolina, and Tennessee with a few locations around the country.
The company has grown through the acquisition and rebranding of smaller regional storage operators, hence you might see some of their old brand names like Snapbox or Exeter on the facility sign.
Units include traditional drive-up, climate-controlled, and vehicle/boat/RV storage, with recorded video surveillance and business delivery acceptance at most sites.
Best for: Renters in the Southeast who want a company still growing its local footprint and reputation.
West Coast Self-Storage has been established in 2006 by four executives from Shurgard and remained focused to one particular region: Washington, Oregon, California, Nevada, and Idaho (with 160 locations, majority being in Washington).
It offers 24-hour video surveillance, personalized PIN access, and month-to-month leases with no deposit or credit card required to reserve.
A partnership with StorageDefender adds optional "Smart Unit" monitoring at select locations, which is a step beyond what most competitors on this list offer.
Best for: Pacific Northwest renters who want a company that specializes exclusively in that region instead of spreading itself thin nationally.
The lowest advertised rate is almost never the real story. The first month prices quoted by storage companies often increase dramatically after a short period - see the historical prices or inquire about the price after month six, not just the first month price.
In addition, verify that the "climate controlled" service includes actual humidity control and not just heating, as they are sold in almost the same way but do a completely different job when storing sensitive material such as electronics or documents.
Company | Best For | Climate Control | Access |
|---|---|---|---|
Public Storage | Overall / most sizes | Yes | Varies, ~6am–9pm |
Extra Space | Security | Yes | Varies by site |
U-Haul | Moving + storage | Yes | Varies |
CubeSmart | Budget | Yes | Varies |
StorageMart | 24/7 access | Yes | 24-hr at many sites |
SmartStop | Flexible leases | Yes | Varies |
Mini Mall Storage | Local service | Yes | 24/7 monitored |
Devon | Filterable features | Yes | Varies |
GoStoreIt | Southeast coverage | Yes | Varies |
West Coast | Pacific Northwest | Varies | 24/7 monitored |
If you want the biggest selection and don't mind comparing a few unit sizes, start with Public Storage or Extra Space. If your timeline is uncertain, SmartStop's true month-to-month lease is hard to beat.
And if you're moving long distance, U-Haul's price lock plus bundled truck rental will likely save you the most hassle.
For everyone else, the regional players - Devon, GoStoreIt, West Coast, Mini Mall - are worth a call, since local operators sometimes beat the national chains on both price and actual customer service.
That said, if you're renting a unit because your business is outgrowing its current space and inventory is piling up, it's worth stepping back and asking whether better floor and space management on-site would solve the problem before you commit to an off-site unit.
