Backblaze's 400% Rally Has Priced In Perfection - The Numbers No Longer Support Chasing

Backblaze (BLZE) stock opened Monday at $20.13 and hit $23.99 - a new 52-week high - after CEO Gleb Budman declared the second quarter "amazing" and the company raised full-year guidance following the $335 million CoreWeave deal that sent shares surging through June and July. The stock is now up roughly 91% in five trading days and approximately 400% year-to-date.

At this point, the question is no longer whether Backblaze is a decent business. The question is whether the risk/reward for buyers entering at 55-month highs makes any sense.

The growth is real - but the rally is not priced at "cheap" anymore

Backblaze reported Q2 2026 revenue of $42.7 million, up 18% year over year. The growth engine is the B2 Cloud Storage segment, which brought in $26.6 million, up 34% year over year, while the legacy Computer Backup business at $16.1 million declined 2%. Annual recurring revenue hit $177.3 million, up 21% year over year. Gross margins held steady at 63%, and adjusted EBITDA - earnings before interest, taxes, depreciation, and amortization, a rough cash-earnings proxy that excludes stock-based compensation and other non-cash items - jumped to $12.8 million, or 30% of revenue, up from 18% a year ago.

Those are solid numbers. Adjusted free cash flow for the first half of 2026 turned positive at $1.4 million versus a $6 million burn in the prior year. Revenue retention rates - the percentage of recurring revenue that existing customers renew and expand - remain healthy at 103% overall and 113% for B2 Cloud Storage.

The trouble is that "solid" does not justify a stock that has more than quadrupled in 120 days. Backblaze still carries a GAAP operating margin of negative 11.6% and a return on invested capital of negative 21.6%. The forward P/E is negative 43.7x - the company is not yet profitable on a forward basis despite the adjusted metrics looking better. At a $1.44 billion market cap and a price-to-sales multiple of 9.2x, the stock is trading at a multiple that would be generous even for a profitable company growing at this pace.

The CoreWeave deal is important - but don't overstate the math

The five-year, $335 million strategic agreement with CoreWeave to provide HDD-based storage capacity for AI workloads is the centerpiece of the Backblaze re-rating. It validates the thesis that cheap, scalable storage is a critical layer in the AI infrastructure stack. Backblaze will support lower-performance tiers of CoreWeave's AI Object Storage, letting CoreWeave reserve its highest-performance storage for compute-intensive training and inference.

But $335 million spread across five or more years equals roughly $67 million per year - against Backblaze's own $172 million to $174 million full-year 2026 guidance. That's material, yes, but it does not double the company overnight, and the revenue recognition will be gradual. The deal also includes warrants valued at approximately $22 million, meaning the pure cash contract value is closer to $313 million. The company's recordable pipeline jumped $319.5 million quarter over quarter, but pipeline-to-revenue conversion takes time and is never one-to-one.

For holders, this is positive. For new buyers chasing a stock that has already rallied 400% this year, the deal was the catalyst that priced in most of the near-term optimism.

The price action says "caution" in the loudest terms available

RSI - the relative strength index, a momentum oscillator that reads above 70 as overbought - sits at 78.1. The stock surged 48% on Monday alone, with intraday volatility of 41.8%. The 50-day moving average is $11.95, meaning the current price of roughly $23 is nearly double the 50-day average. The 200-day moving average sits at $6.87.

This is not a stock that has been battered by pessimism and is now offering an asymmetric entry. This is a stock that has gone parabolic on a narrative catalyst and is now trading at the outer edge of momentum. When RSI is in the high 70s after a 400% annual run, the risk/reward for new buyers shifts sharply against them. A modest pullback of 20-30% - well within the normal range for a small-cap that has moved this fast - would bring the stock back toward its 50-day average and offer a much more defensible entry.

What would make me reconsider

If Backblaze can demonstrate that GAAP profitability - not just adjusted EBITDA - is within reach in the next two to three quarters, and if the B2 Cloud Storage segment sustains 30%+ growth without requiring disproportionate capex, the higher valuation multiple would earn its keep. The company's balance sheet is clean on the surface: $32.4 million in cash. But $135.3 million in total debt against $88.5 million in equity is a leverage profile that leaves limited room for error if growth decelerates.

The bottom line

I don't think investors need to chase this rally. Backblaze has a genuine business with accelerating growth in its cloud storage segment, and the CoreWeave deal provides real visibility into future revenue. But the stock has already moved from a compelling growth opportunity to an extended momentum trade. The setup for holders remains constructive. For buyers looking to enter, the better risk/reward is on a meaningful pullback - ideally back toward the low-to-mid $10s where the 50-day moving average and more reasonable valuations would offer margin of safety.

A stock that grows 34% in its best segment and has turned positive on adjusted cash flow is still not a stock you chase after a 400% run with an RSI of 78. Patience is the discipline that separates contrarian buyers from momentum victims.