Stax (Fattmerchant, Inc.) offers SaaS payment processing and billing software for software platforms and SMBs.
Based in Florida, US, and founded in 2014, Fattmerchant, Inc., doing business as Stax, offers payment and management software to business owners and software companies. Its products include Stax Pay, Stax Connect, Stax Bill, Stax Processing and CardX by Stax. In October 2023, Stax, a portfolio company of Blue Star Innovation Partners, DeepWork Capital and PSG Equity, acquired Atlantic-Pacific Processing Systems (APPS). As of June 2024, the company had over 30,000 merchant customers and is led by CEO Paulette Rowe.
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