As mentioned, Tesla’s Workplace Charging program
Charging Partners | Tesla can include both Tesla-specific and standard J1772 charging stations.
ClipperCreek makes high-quality and robust equipment that will last for many years.
PowerFlex has some systems that can do coordination across many units to reduce the total demand charge of your site. You can install dozens or hundreds of stations and not need to risk getting a huge demand charge on your monthly electric bill (and issue on commercial electric bills) or exceed the capacity of an upstream panel/transformer.
Some employers don’t want to give out the electricity for free. Mine doesn’t because they don’t want ICE drivers to get jealous and complain, even though they give out free coffee to others (and I refuse to drink that “poison”) and they subsidize soda pop down to 25 cents a can in the vending machines. Each of those are more of a subsidy than free charging would actually be. Well, I do get 2 cents per day of electricity to recharge my Rad Power Bikes fat tire eBike on a dedicated outlet. For charging stations that can process payments:
The previously mentioned WattZilla units have an optional credit card reader option. They integrate a credit card system from a vending machine. There are some limitations with this, so be sure to contact them to discuss before purchase. This will be 2x to 3x the cost of a ClippedCreek unit.
In addition, there’s obviously ChargePoint. These stations are even more expensive and will be 2x the cost of the WattZilla stations and also include a monthly service fee for the payment processing and on-line repotting/monitoring. These have the ability to lock out non-employees from charging. We use these at work and before charging, you need to register your ChargePoint account to gain access.
It kind of depends upon what your goals are and how many stations you want to install.