Small Transfers — charge from 0.000001 USD per request for your SaaS. It was shared on Show HN in 2025 and received 198 upvotes on Hacker News. Small Transfers is an online payment platform that lets SaaS and API providers bill their customers as little as 0.000001 USD per request. Prepaid bundles have a similar barrier to entry. Occasional users pay only for what they use. Example A simple use case Your Service You offer an online service that allows customers to increase the resolution of an image using AI. Charging Each time a customer uses your service, you charge their Small Transfers account 0.01 USD . Automated Payments We charge customers, keep track of their payment methods, retry failed payments, and send reminders. We don't store full card details (PCI DSS SAQ A). Amount Owed Limit Each customer also has a limit to the amount they can owe, which starts at 10 USD and increases up to 30 USD with successful payments. The customer is charged as soon as they reach that limit. If the amount is still under 2 USD , we charge at least 0.50 USD and credit the difference (after fees) to their account for future use. Easy Setup Three simple steps Connect Stripe Connect your existing Stripe account or create a new one, so we can easily transfer customer payments to you. Payment-processing fees are added to the customer's bill, never to yours. Not sure if Small Transfers is a good fit? Small Transfers was founded by Dr Rok Strniša , an entrepreneur with over 15 years of experience in the tech industry. Rok has a PhD in Computer Science from the University of Cambridge . Yes, you can charge a different amount for each request , which is useful when your cost varies with each request. If you are thinking of charging a different amount, please contact us . After a customer pays, the funds are immediately forwarded to your Stripe account using a Stripe transfer.