RAM (DRAM) 1 company
RAM holds what a processor is working on, and loses it when the power goes off. Only three companies in the world make DRAM.
Flash memory 1 company
Flash memory keeps data when the power is off. It is the storage in phones, memory cards and SSDs.
Hard drives 1 company
Hard drives store data on spinning magnetic disks. They are slower than flash but much cheaper for very large amounts.
What's changing
The memory wall.
AI processors can compute far faster than memory can feed them. High-bandwidth memory, stacked right beside the processor, has become one of the most sought-after chips in the world.
Companies: ingrid's company map. Hiring signals: postings feed of 5 Nov 2026.


