SumUp’s free mobile processing app isn’t a good substitute for a full POS system, but for small businesses that only need basic POS features and on-the-go credit card processing, it’s definitely a contender.

PaymentCloud provides payment processing solutions for eCommerce, mail order/telephone order (MOTO), and other generally high-risk businesses. Although PaymentCloud serves lower-risk and brick-and-mortar establishments, this merchant services provider shines in the eCommerce and mid-to-high-risk space.

eMerchantBroker is a merchant account provider that specializes in offering credit card processing services to a wide variety of industries that are usually classified as being high-risk by traditional banks and credit card processors.

While many of the more reputable merchant account providers have abandoned terminal leases altogether in favor of selling the terminals directly (or allowing you to reuse your existing equipment), there are still plenty of other providers that are still pushing terminal leases. Check out the best credit card processing companies for some good options that let you buy your credit card terminal at an affordable price.

Host Merchant Services offers a full range of products and services for just about any type of business.

Of course, everyone’s experience with a particular processor won’t be the same. It’s important to weigh the complaint volume of a company against its processing volume. A processor serving a hundred thousand merchants with 100 complaints is a much different scenario from a processor serving ten thousand merchants with 100 complaints. That being said, a processor with a lot of complaints about the same issue should be an immediate red flag.

Is Square’s free card reader really the best out there? See how Square’s hardware stacks up against its competitors with our in-depth comparison.

Square’s merchant services are powerful and well priced — but they aren’t the same as having your own dedicated merchant account to accept credit card payments. See how Square’s credit card processing compares to top-tier merchant accounts in terms of pricing, support, overall value, and more.

There’s a lot to love about Helcim. What we love is that you won’t have to worry about the bait-and-switch tactics and long-term, binding contracts that plague the industry. Helcim distinguishes itself from many other providers by offering no binding contracts, exclusive interchange-plus pricing, consistently good customer service, and low account fees.

First Data (now Fiserv) is a massive company offering everything a merchant could need for payment processing. But small businesses will pay a premium for access, whereas large businesses might be able to negotiate a fair deal.