Square now processing $10 billion in payments annually

Square, the mobile payments startup founded by Jack Dorsey, is now processing $10 billion (UK£6.3 billion, AUD$965,158,000) in payments annually.

Since Dorsey is also the co-founder of Twitter, the announcement of this milestone came not from a press release, but from a tweet.

"Today we're processing $10B in payments annually, an amazing and humbling milestone," said Square, Inc. on Twitter.

Rounding out the 140 character limit, the company credited its users, saying, "To the small businesses growing with Square, thank you."

Square spokeswoman Faryl Ury added to that small business-focused sentiment.

"We've seen growth across the board," Ury told TechRadar, "from small food trucks and coffee shops, to retail stores and larger brick and mortar merchants."

A jolt expected from Starbucks

While Square may have a growing user base of small and medium-sized businesses, it's about to add a much larger client with 7,000 stores: Starbucks.

Starbucks is scheduled to start accepting the Square Wallet this month following the coffeehouse chain's $25 million (UK£15.7 million, AUD$24,128,950) investment in the startup.

Square faces growing competition from PayPal Here, Intuit GoPayment, and Groupon Payments, all of which offer slightly more affordable transaction fees.

However, the company remains the mobile payments leader.

Two months ago, Square reached $8 billion payments processed annually. With the impending addition of Starbucks, the "humbling milestone" tweets should keep on coming.