Backblaze (BLZE) Q4 2025: B2 Cloud Storage Revenue Grows 24%, Marking Key AI-Driven Expansion
Backblaze accelerated its transition to profitability with adjusted free cash flow positivity in Q4, driven by strong growth in its B2 cloud storage segment amid AI market expansion. The company’s strategic focus on neocloud platforms and upmarket customer acquisition underpins durable revenue streams and positions it for future scale. Investors should watch the ramp of a landmark eight-figure neocloud deal and evolving gross margin dynamics as key drivers into 2026.
Summary
- AI Infrastructure Expansion: Backblaze is leveraging AI-driven data growth to deepen its role as a storage backbone for neocloud platforms.
- Go-to-Market Transformation Progress: Upmarket customer growth and pipeline expansion underpin a more predictable and scalable revenue base.
- Profitability Milestone Achieved: Adjusted free cash flow turned positive in Q4, signaling operational leverage and capital efficiency.
Business Overview
Backblaze operates a high-performance cloud storage platform tailored for the AI era, generating revenue primarily through two segments: B2 Cloud Storage and Computer Backup. B2 Cloud Storage, the company’s growth engine, provides scalable, cost-effective storage solutions designed especially for AI and data-intensive applications. Computer Backup offers consumer and business backup services, representing a legacy but still significant portion of the business.
Performance Analysis
Backblaze reported total revenue of $37.8 million in Q4 2025, reflecting 12% year-over-year growth, led by a 24% increase in B2 Cloud Storage revenue to $21.3 million. This segment now accounts for more than half of total revenue and is the primary growth driver. Computer Backup revenue remained flat at $16.5 million, reflecting a mature and slowly declining business. The company achieved gross profit margins of 62%, up from 55% a year ago, indicating improved cost efficiency despite rising data center expenses.
Adjusted EBITDA margin doubled to 28%, fueled by operational leverage and non-recurring cost savings, while adjusted free cash flow turned positive at $4.1 million for the first time as a public company. This milestone underscores the scalability of Backblaze’s cloud storage platform and disciplined capital management. However, net revenue retention (NRR) for B2 declined slightly to 111% from 116% the prior year, impacted by variability from a large AI customer. The company’s annual recurring revenue (ARR) for B2 grew 27% to $88.9 million, highlighting durable subscription-based revenue streams.
- Segment Growth Divergence: B2 Cloud Storage shows robust expansion while Computer Backup faces steady decline.
- Profitability Leverage: Operating margins and free cash flow improved markedly, driven by scale and cost discipline.
- Customer Base Evolution: Upmarket customers generating over $50,000 in ARR grew 35%, with ARR from this cohort up 73%.
Overall, the financial results reflect a company successfully navigating the transition from legacy backup services to a cloud storage leader positioned for AI-driven demand growth.
Executive Commentary
"We finished 2025 with solid fourth quarter results. Revenue came in line with guidance and adjusted EBITDA margin reached 28%, doubling over the prior year. We also deliver adjusted free cash flow profitability for the first time as a public company, a major milestone demonstrating the inherent operating leverage in our business model."
Gleb Budman, Co-founder, CEO & Chairperson
"This progress was not driven by short-term cost actions, but by the inherent leverage in our operating model as revenue scales. In the fourth quarter, B2 revenue grew 24% year-over-year, up from 22% in the prior year. We delivered record bookings this quarter, including our largest contract in the company's history with over $15 million in total contract value."
Mark Sweetan, Chief Financial Officer
Strategic Positioning
1. AI and Neocloud Opportunity Focus
Backblaze is capitalizing on the rapid growth of AI workloads by positioning its B2 Neo, a white label storage solution tailored for neocloud providers. These neoclouds, numbering around 200, represent a $14 billion market opportunity over five years. The company’s first eight-figure neocloud deal validates this strategy, with Backblaze serving as a scalable, cost-effective storage backbone that hyperscalers typically do not provide to these emerging platforms.
2. Go-to-Market Transformation and Upmarket Expansion
The company is actively transforming its sales and marketing approach to target larger customers and improve pipeline consistency. The number of customers generating over $50,000 in ARR grew 35% year-over-year, with ARR from this segment increasing 73%. Initiatives such as the Flamethrower startup program aim to deepen engagement with high-growth AI startups, fostering long-term platform affinity.
3. Operational Discipline Driving Profitability
Backblaze’s adjusted free cash flow turned positive in Q4 for the first time post-IPO, reflecting the operating leverage of its cloud storage model. While gross margin pressures are anticipated due to increased data center costs and upfront investments for large neocloud deals, management is implementing structural pricing and infrastructure optimizations to mitigate margin erosion.
4. Leadership and Advisory Enhancements
The company strengthened its product and engineering leadership with hires experienced in AI and high-performance cloud infrastructure. Additionally, a go-to-market advisory committee comprising executives from leading enterprise platforms has been established to accelerate strategic execution and scale.
5. Legacy Business Stabilization Efforts
While the Computer Backup segment is expected to decline approximately 5% in 2026, Backblaze is deploying programs to stabilize or modestly grow this legacy business, recognizing its role in overall revenue diversification and customer retention.
Key Considerations
Backblaze’s Q4 results highlight a company in transition, balancing legacy revenue streams with a strategic pivot to AI-driven cloud storage. The following factors are critical for investors to monitor:
- Large Deal Ramp Timing: The $15 million-plus neocloud contract is expected to contribute materially starting in 2027, with upfront integration work delaying revenue recognition.
- Gross Margin Pressure: Investments in capacity and rising data center costs may compress margins near term, requiring execution on pricing and operational efficiencies.
- Customer Retention Variability: NRR fluctuations driven by large AI customers introduce some revenue timing uncertainty, underscoring the importance of diversified growth.
- Pipeline Growth Trajectory: Doubling of pipeline to $30 million in 2025 sets a foundation for scaling sales velocity and closing larger deals.
- Capital Allocation Discipline: Continued reliance on operating cash flow and capital leases for funding supports a self-sustaining growth model without near-term capital raises.
Risks
Backblaze faces risks including the timing and scale of large neocloud deal deployments, potential margin compression from increased costs, and the challenge of stabilizing its legacy Computer Backup segment amid shifting customer preferences. Competitive pressures from hyperscalers and other cloud storage providers could impact market share and pricing power. Execution risk in scaling go-to-market initiatives also remains a key consideration.
Forward Outlook
For Q1 2026, Backblaze expects revenue between $37.6 million and $38 million, with adjusted EBITDA margins of 18% to 20%. Full-year 2026 guidance projects revenue of $156.5 million to $158.5 million and adjusted EBITDA margins between 19% and 21%. Adjusted free cash flow is anticipated to be roughly neutral for the year, with normal quarterly variability. Management expects B2 year-over-year growth of approximately 20% for the full year, with a 12% to 19% growth range in Q2 and Q3 reflecting challenging comparables.
Key factors influencing guidance include:
- De-risking outlook by excluding large variable deals from baseline forecasts.
- Continued expansion within existing customer base and steady adoption of B2 across core use cases.
Takeaways
Backblaze’s Q4 2025 results illustrate a company successfully leveraging AI-driven demand to transform its revenue base and achieve profitability milestones. Key takeaways for investors include:
- AI Opportunity as Growth Catalyst: The launch of B2 Neo and the signing of a landmark eight-figure neocloud deal validate Backblaze’s positioning as a critical storage provider in the AI infrastructure ecosystem.
- Operational Leverage Realized: Adjusted free cash flow positivity and margin expansion demonstrate scalable economics, though margin headwinds from cost inflation warrant monitoring.
- Execution on Go-to-Market Transformation: Progress in upmarket customer acquisition and pipeline growth sets the stage for more consistent and predictable revenue growth, offsetting legacy segment pressures.
Conclusion
Backblaze closed 2025 with solid growth and a major profitability milestone, driven by its expanding role in the AI cloud storage market. The company’s strategic investments in product, go-to-market, and customer engagement position it well for sustained growth, though execution risks and margin pressures require careful attention. The ramp of large neocloud deals and continued upmarket penetration will be critical to watch in 2026 and beyond.
Industry Read-Through
Backblaze’s results underscore the accelerating shift toward specialized cloud storage solutions tailored for AI workloads and emerging neocloud platforms. The company’s success in securing large-scale neocloud contracts reflects broader industry demand for scalable, cost-efficient storage that hyperscalers may not address. Other cloud storage providers and infrastructure players should note the importance of white label offerings and developer-focused programs to capture AI-driven data growth. Margin pressures from rising data center costs and capital intensity are also industry-wide challenges requiring innovation in pricing and operational efficiency.