Bitdeer challenges MARA as top Bitcoin miner with 71 EH/s capacity

Summary

• Bitdeer reports 71 EH/s under management, including 55.2 EH/s self-mining, potentially topping MARA’s 61.7 EH/s energized hashrate and equal to ~6% of global Bitcoin hashrate.
• SEAL04-1 chips deliver roughly 6–7 J/TH efficiency at chip level, helping Bitdeer boost December BTC production 339% year-over-year to 636 BTC while phasing out third-party rigs.
• Bitdeer pivots sites toward AI/HPC with 1,152 GPUs across global campuses, while MARA leans on Bitmain Antminers and a 55,000+ BTC treasury strategy versus Bitdeer’s 2,017 BTC.

Bitdeer Technologies Group reported a total hashrate under management of 71 exahashes per second (EH/s) at the end of December, potentially positioning the Singapore-based company ahead of MARA Holdings Inc. in total bitcoin mining capacity, according to company data.

The figure includes 55.2 EH/s dedicated to self-mining and additional equipment hosted for third parties, the company stated. MARA currently reports a capacity of 61.7 EH/s on its official website.

MARA had established itself as the largest publicly traded miner by self-generated hashrate since mid-2023, growing from less than 20 EH/s to surpassing 60 EH/s in September 2025. The comparability between Bitdeer’s “total hashrate under management” metric and MARA’s “energized hashrate” remains unclear.

BitDeer challenges MARA

Bitdeer disclosed a self-mining capacity of 55.2 EH/s, with more than 1,100 chips deployed, 538 of which operate under external subscription agreements, according to the company.

“Bitdeer reported 71 EH/s of capacity as of end December (~6% of the global hashrate), +18% month over month and +229% year over year,” Matt Sigel, Head of Research at VanEck, stated in a post on X. “Like other miners, they are actively selling everything they mine (and more) to fund the AI pivot.”

The company has expanded operations through deployment of its proprietary SEALMINER chips. Bitdeer mined 636 bitcoins in December 2025, compared with 145 bitcoins in December 2024, according to its quarterly report.

The company’s SEAL04-1 chip demonstrated energy efficiency of approximately 6-7 joules per terahash at the chip level under low-voltage conditions, compared with MARA’s reported “fleet energy efficiency” of 19 joules per terahash, though direct comparison between these metrics may not be equivalent.

Bitdeer is expanding AI and high-performance computing infrastructure through construction projects at eight sites in Canada, Ethiopia, Norway, and the U.S. states of Ohio, Tennessee, and Washington, according to the company.

MARA operates 18 data centers that primarily use Bitmain’s Antminer ASIC chips. The company maintains a strategy of retaining mined bitcoins, holding more than 55,000 bitcoins, the second-largest treasury among public companies. Bitdeer holds 2,017 bitcoins, according to company disclosures.

The artificial intelligence sector’s growth has influenced mining economics, prompting companies to develop high-performance computing infrastructure and secure access to low-cost energy sources.