Backblaze Lands $335M CoreWeave AI Storage Deal

The AI boom is not only about GPUs. It is also about somewhere to put the mountains of data those GPUs consume. On June 23, 2026, Backblaze announced a multi-exabyte, $335 million agreement to supply cost-efficient cloud storage underpinning CoreWeave's AI object storage. For a mid-sized storage company it is a windfall, and for the rest of us it is a window into the unglamorous plumbing that makes large-scale AI possible.

Key takeaways

• Backblaze signed a multi-exabyte, $335 million storage agreement with CoreWeave, announced June 23, 2026.
• The arrangement spans initial terms of five and seven years across multiple order forms.
• Backblaze provides cost-efficient HDD-based capacity that supports portions of CoreWeave's managed storage.
• CoreWeave customers gain new storage tiers without changing any application code.
• The deal includes warrants for CoreWeave covering up to 4.19 million Backblaze shares at $7.60 each.

What happened

CoreWeave is one of the "neocloud" providers renting out GPU capacity to AI developers; it counts 9 of the top 10 AI model providers among its customers. All that AI work generates enormous volumes of data that must be stored cheaply when not in active use. Rather than build out every tier of storage itself, CoreWeave turned to Backblaze, whose business is exactly that: inexpensive, durable, HDD-based cloud storage.

Under the agreement, Backblaze supplies capacity that supports portions of CoreWeave's managed storage, helping place data across performance tiers so expensive high-speed storage is reserved for active AI workloads. A notable feature is that CoreWeave customers can access the new tiers immediately without changing any application code, a sign of how deeply Backblaze's platform is being woven into CoreWeave's stack. The structure also embeds equity upside: two warrants let CoreWeave acquire up to 4.19 million Backblaze shares at $7.60 each, with vesting tied to time under the agreement and to contracted capacity.

Why AI data lives in tiers

Not all data deserves expensive flash. The whole point of this deal is moving the right data to the right (cheaper) place.

Tier	Storage type	Holds	Relative cost
Hot	High-speed flash / NVMe	Active training and inference data	Highest
Warm	Faster object storage	Recent datasets, checkpoints	Medium
Cold	HDD-based object storage (Backblaze)	Archived datasets, logs, model history	Lowest

By offloading the warm and cold tiers to Backblaze's HDD capacity, CoreWeave keeps its premium flash free for the workloads that actually need speed, which is the economic logic behind the entire arrangement.

Why it matters

For Backblaze, a company far smaller than the AI giants, a $335 million multi-year commitment is transformative, validating its low-cost storage model for AI-scale workloads. For the industry, the deal illustrates a quieter side of the AI buildout: every accelerator and every model creates a long tail of cold data that needs a cheap, durable home.

It also fits the broader pattern of AI infrastructure being assembled from layered partnerships rather than single vertically integrated providers, the same dynamic behind memory deals like the NVIDIA and SK hynix pact and the energy pressures of the AI data-center build-out. Storage is the layer that rarely makes headlines, but the numbers here show it is becoming a strategic battleground of its own.

What is next

The agreement runs for years, so its effects will compound over time:

1. Capacity ramp. Backblaze scales delivery as CoreWeave's storage needs grow with its GPU fleet.
2. Tiered placement. Expect continued optimization of which data sits on cheap HDD capacity versus high-speed tiers.
3. Equity alignment. The warrant structure ties Backblaze's upside to CoreWeave's growth, deepening the partnership.
4. Market signal. Watch whether other neoclouds strike similar deals with low-cost storage providers.

Frequently asked questions

What is the Backblaze-CoreWeave deal worth?

It is a multi-exabyte storage agreement valued at $335 million, announced June 23, 2026, with initial terms spanning five and seven years.

Why does CoreWeave need a storage partner?

CoreWeave provides GPU compute for AI developers, which generates huge volumes of data. Partnering with Backblaze gives it cost-efficient capacity for data that does not need expensive high-speed storage, while keeping fast tiers free for active workloads.

What do the warrants mean?

The deal grants CoreWeave warrants to buy up to 4.19 million Backblaze shares at $7.60 each, with vesting tied to time and contracted capacity, aligning both companies' incentives as usage grows.

Why is this significant for the AI industry?

It highlights that AI infrastructure depends on more than GPUs. Cheap, durable storage for vast datasets is a strategic layer, and large deals like this show storage becoming central to the AI buildout.

GPUs get the glory, but data has to live somewhere. The Backblaze deal is a reminder that the economics of AI are decided as much in the cold-storage racks as in the server rooms full of accelerators.