Braiins

Braiins Pool, originally launched as Bitcoin.cz Mining Pool in December 2010 by Marek "Slush" Palatinus and subsequently acquired and operated by Braiins, is the world's first and longest-running Bitcoin mining pool, with more than 1.3 million BTC mined across its 15-year history. The pool operates on a Full Pay Per Share model that includes transaction fees in reward calculations. In February 2024, Braiins partnered with payments infrastructure provider Voltage to introduce Lightning Network payouts with no minimum withdrawal threshold; the program exceeded 1,000 daily Lightning payouts within months of launch, with volume growing at approximately 20% month-over-month from mid-2024 into early 2025.

Braiins OS is open-source custom firmware compatible with Bitmain Antminer series ASICs and other major miners. The firmware's autotuning engine optimizes chip performance across any selected power limit, improving efficiency in joules per terahash and extending hardware lifespan. In 2019, Braiins co-authored the Stratum V2 specification alongside Bitcoin developer Matt Corallo, publishing an open-source mining protocol that encrypts miner-to-pool connections, compresses bandwidth, and gives miners the option to construct their own block templates, shifting block-building authority away from pools and toward individual operators.

Braiins Toolbox consolidates firmware deployment, performance optimization, and settings management for fleet operations into a single application. Braiins Farm Proxy reduces data transmission between mining farms and pools by up to 95%, supporting parallel multi-pool configuration and automated failover.

On hardware manufacturing, Braiins released the BMM 100 (marketed as the first Bitcoin miner designed and assembled in Europe), followed by the BMM 101, rated at 1 TH/s and 35 W, targeting home and small-scale miners. For industrial buyers, Braiins maintains ASIC inventory at warehouses in the United States and Hong Kong, alongside containers, transformers, switchgear, and liquid cooling components; U.S. orders ship domestically with no import duties, and international orders dispatch from Hong Kong within five to seven days under DAP terms. Braiins Hashpower, the company's virtual hashrate marketplace, allows buyers to acquire SHA-256 mining power on a pay-as-you-go basis with deployment to any pool or solo mining, without physical hardware ownership.

In 2023, Braiins raised funding for its hardware R&D subsidiary Hash Mining through a bond offering covering laboratory equipment, software licenses, and prototype production; the offering closed oversubscribed. Braiins subsequently acquired the remaining ownership stake in Braiins Pool from Palatinus, who refocused on SatoshiLabs, consolidating full operational control of the pool under the company.