Best Payment Gateway software

Pays-as-you-go with no monthly fees.

Supports 135+ currencies and payment methods.

Account closures and fund freezes can happen without clear warning.

Support escalation process is slow, generic, and lacks transparency.

Instant bank withdrawals for supported banks.

Fast funding for online platforms.

Poor customer service with slow, unhelpful, or automated responses.

Frequent reports of accounts being closed or funds frozen without clear explanation.

Fast money transfers and easy bill splitting.

Flexible payment options like Pay in 4 for budgeting.

Customer service is slow and often unhelpful.

Dispute resolution favors sellers and lacks transparency.

Nickel Core is free and includes unlimited ACH transfers, eliminating per-transaction costs for basic money movement

Bill pay is part of the free plan rather than being reserved for a paid tier

The product is built for US businesses, so companies with operations outside the US or significant cross-border payment needs are not the target market

Advanced workflows sit behind paid plans, meaning the free tier covers basic payments but not deeper automation

Free plan with usage-based fees means businesses can adopt Square with no upfront monthly commitment — plans start at $0/month.

Tap to Pay on iPhone or Android turns an existing phone into a contactless terminal, eliminating hardware cost for low-volume or mobile sellers.

Flat-rate, usage-based processing fees are convenient but usually cost more than interchange-plus pricing for high-volume merchants.

Card readers and terminals are sold separately, so a fully equipped counter requires an upfront equipment purchase.

Enables receiving and sending payments in 190+ countries

Multi-currency digital wallet for freelancers and businesses

Frequent account closures without clear explanation

Slow and often unresponsive customer support