Backblaze (BLZE) Q4 2025 earnings review
Profitability Milestone Reached, But Growth Story Cracks
Backblaze delivered on its promise to reach positive Adjusted Free Cash Flow in Q4, generating $4.1M (11% margin). However, the top-line narrative tells a sobering story. Total revenue growth is decelerating, and the critical B2 Cloud Storage segment grew 24% YoY—falling significantly short of management's persistent >30% exit target touted earlier in the year. Furthermore, FY26 guidance implies a continued deceleration to ~8% total revenue growth. While the company successfully landed a record eight-figure neocloud deal via its new B2 Neo offering, the divergence between expanding margins and slowing revenue indicates a transition from a hyper-growth AI play to a cash-optimizing value business.
🐂 Bull Case
Adjusted EBITDA margin hit a record 28%, and the company achieved positive Adjusted Free Cash Flow for the first time since IPO, executing perfectly on its cost-discipline promises.
Securing an eight-figure TCV deal and growing ARR from $50k+ customers by 73% YoY proves the platform can win large, data-heavy AI infrastructure deployments.
🐻 Bear Case
Management previously guided for B2 revenue to exit 2025 growing over 30%. Actual Q4 B2 growth came in at 24%, breaking the core AI-driven hypergrowth narrative.
FY26 revenue guidance implies just ~8% YoY growth. For a cloud storage company positioned as the 'backbone for the AI era', single-digit growth is a severe red flag.
⚖️ Verdict: ⚪
Neutral. The operational pivot to profitability was executed flawlessly, but the associated collapse in top-line growth metrics forces a re-evaluation of the stock's terminal growth rate. It is a safer, more stable business today, but the AI-hypergrowth thesis has not materialized in the financials.
Key Themes
B2 Growth Decelerates, Missing 30% Target
The most glaring data point contradicting management's bullish AI narrative is the B2 Cloud Storage growth rate. Throughout early 2025, management explicitly targeted exiting the year with >30% B2 growth. Instead, B2 growth peaked at 29% in 25Q2 and has been decelerating since, landing at 24% in Q4. This signals that either AI workloads are lumpier than expected, or the go-to-market transformation has stalled.
Upmarket Traction Accelerating
The strategy to move upmarket is yielding tangible results. ARR from customers generating more than $50,000 annually increased 73% YoY to $26 million. The number of these customers grew 35% to 168. This proves the direct sales motion and enterprise features are successfully landing larger deals.
B2 Neo and Neocloud Adoption
Backblaze is successfully positioning itself as the storage backbone for emerging GPU and AI compute providers. The launch of 'B2 Neo' directly targets neoclouds, allowing them to white-label Backblaze storage. The signing of a record eight-figure neocloud TCV deal validates this product-market fit.
Aggressive Margin Expansion
Operating leverage is accelerating rapidly. Adjusted Gross Margin reached 80% (up from 78% a year ago). More impressively, Adjusted EBITDA margin doubled YoY to 28%. This proves the company's cost-control initiatives and hardware lifecycle extensions are flowing directly to the bottom line.
Net Revenue Retention (NRR) Compression
Total company NRR fell significantly to 105%, down from 116% in 24Q4. More worryingly, B2 NRR dropped to 111% (from 123% a year ago), and Computer Backup NRR slipped below 100% to 98%. This indicates slowing expansion within the existing customer base, forcing the company to rely harder on net new logos to drive growth.
Computer Backup Segment is a Drag
The legacy Computer Backup business remains stagnant. Revenue was $16.5M, completely flat YoY, and ARR is also flat at $65.5M. With gross customer retention at 91% but NRR at 98%, this segment is slowly bleeding and diluting the broader company's growth profile.
Other KPIs
Reversing the trend from previous years, Backblaze achieved its long-standing goal of positive Adjusted Free Cash Flow. This represents an 11% margin and an $8.6 million YoY improvement, confirming the business can self-fund its current operations.
Reversing from a $3.0M loss in 24Q4. This translated to $0.06 per share, demonstrating that stripping out stock-based compensation and restructuring costs yields a structurally profitable software business.
Guidance
Decelerating. The midpoint of $157.5M implies just ~8% YoY growth over FY25's $145.8M. This is a severe drop from the 14% growth achieved in FY25 and indicates the core growth engine is slowing down significantly.
Decelerating YoY and stable/flat sequentially. The midpoint implies ~9% YoY growth (down from 15% in 25Q1). Sequentially, it implies zero growth from 25Q4's $37.8M, suggesting a stalled bookings engine entering the new year.
Reversing vs current exit rate. While 20% at the midpoint is roughly in line with the FY25 average (22%), it represents a massive sequential step-down from the 28% achieved in 25Q4. This suggests Q4 benefited from seasonal or one-time cost suppressions that will not persist.
Key Questions
B2 Growth Narrative vs Reality
Management previously stated extreme confidence in exiting 2025 with >30% B2 growth. With Q4 coming in at 24%, what exactly broke in the pipeline or customer usage patterns during the second half of the year?
Sequential Margin Contraction
Adjusted EBITDA margin reached an impressive 28% in Q4, yet Q1 and FY26 guidance points back down to ~19-20%. What specific expenses are being re-introduced to the P&L that cause this 800 basis point step-down?
Implied Growth Stagnation
Q1 2026 revenue guidance implies flat sequential growth from Q4. With the new 8-figure neocloud TCV deal and the 'Flamethrower' program launching, why is this momentum not translating into top-line sequential growth?
Computer Backup Strategy
With the Computer Backup segment officially showing flat revenue and sub-100% NRR, is the company managing this segment for cash, or is there a genuine turnaround plan to prevent it from further diluting B2's growth?