Backblaze (BLZE) Q2 2025: B2 Revenue Accelerates 29% as AI Storage Demand Scales
Backblaze’s Q2 marked a decisive inflection in B2 cloud storage, as AI-driven demand propelled segment growth and shifted the business mix upmarket. Management’s focus on innovation, operational discipline, and enterprise sales is enabling margin expansion and accelerating the transition to a Rule of 40 profile. Guidance lifts on B2 outperformance, but variability from large AI customers and legacy backup headwinds remain key watchpoints for investors.
Summary
- AI Storage Surge: AI customers now represent three of the top ten, with data stored up 40x year-over-year.
- Enterprise Shift Gains Traction: Large-account wins and product innovation drive pipeline and margin expansion.
- Profitability Milestone Approaching: Free cash flow positive target remains on track for Q4 as operating leverage improves.
Business Overview
Backblaze provides cloud-based data storage solutions via two primary segments: B2 Cloud Storage (object storage for business and developer workloads) and Computer Backup (consumer and SMB backup for endpoints). Backblaze’s revenue model is subscription and consumption-based, with B2 targeting enterprise and AI workloads, and Computer Backup serving as a legacy, steady cash generator. The company differentiates through predictable pricing, ease of use, and a focus on cost-effective, high-performance storage—especially as AI and data-intensive applications proliferate.
Performance Analysis
B2 Cloud Storage delivered a standout quarter, with revenue growth accelerating to 29% year-over-year—a marked step up from the prior run rate and now comprising over half of total revenue. This acceleration was powered by direct sales bookings, AI customer wins, and a tangible shift upmarket: the number of customers generating over $50,000 in ARR rose 30% to 150, and another seven-figure customer was added for the fourth consecutive quarter. The launch of B2 Overdrive—a high-performance tier targeting AI and large-scale workloads—secured a six-figure customer within two months of release, validating strong product-market fit and pricing power.
Gross margin expanded to 63%, up from 55% a year ago, largely due to revised asset lifespans and scale benefits. Adjusted EBITDA margin doubled to 18%, reflecting disciplined cost controls and operating leverage. Computer Backup revenue grew modestly, but management now expects this segment to decline low to mid-single digits going forward as price increase tailwinds fade and secular headwinds persist. Overall, the business is tracking toward adjusted free cash flow positivity in Q4, with strong cash and new credit facilities bolstering flexibility.
- B2 Growth Engine: Net new ARR for B2 reached a record $6.9 million, with diversified drivers across organic expansion, cross-sell, and new logo acquisition.
- Margin Expansion: Hardware useful life extension and infrastructure scale drove gross margin improvement; adjusted gross margin reached 79%.
- Cost Discipline: Zero-based budgeting freed $8 million in expenses, redeployed for productive growth and efficiency.
While the B2 segment is now the clear growth driver, the business remains well-diversified across direct and channel sales, and management is actively refining go-to-market and customer success motions to sustain momentum.
Executive Commentary
"We’ve accelerated year over year B2 growth from 22% at the end of last year to 29% this past quarter, and we remain on course to be adjusted free cash flow positive in Q4. This marks an important step as we continue our progress towards becoming a profitable Rule of 40 company."
Gleb Budman, Co-founder, CEO and Chairperson of the Board
"The combination of our zero-based budgeting exercises, our go-to-market transformation, and the AI revolution, including a significant AI customer, is driving these strong results. We remain on track to achieve our guidance of becoming free cash flow positive in Q4 of this year."
Mark Sweetan, Chief Financial Officer
Strategic Positioning
1. AI-Driven Product and Market Focus
Backblaze is capturing the rapid growth in AI storage demand, with three of its top ten customers now in AI and data stored by AI customers up 40x year-over-year. The B2 Overdrive product directly targets high-throughput, high-value AI use cases, commanding premium pricing and opening new market segments.
2. Upmarket and Enterprise Sales Transformation
Enterprise pipeline and large-account wins are accelerating, evidenced by a 30% increase in $50K+ ARR customers and a consistent cadence of seven-figure deals. Account-based marketing, field enablement, and revamped customer success are driving this shift, while channel partnerships remain a secondary but growing contributor.
3. Operational Leverage and Cost Efficiency
Zero-based budgeting, asset life optimization, and targeted reinvestment have unlocked operating leverage, enabling margin expansion without sacrificing innovation. The balance sheet is fortified by a $20 million credit facility and a $10 million share repurchase program focused on offsetting equity dilution.
4. Product Innovation and Security Differentiation
Recent launches—such as Anomaly Alerts, Enterprise Web Console, and Legal Hold— enhance security and compliance, supporting upmarket momentum. These features are tailored to enterprise requirements and are being incorporated into the sales motion to increase adoption and retention.
5. Legacy Segment Management
Computer Backup remains a stable revenue stream but faces secular decline. Management is applying B2 learnings to revitalize this segment, with new enterprise features and a focused internal team, though no near-term price increases are planned.
Key Considerations
This quarter underscores Backblaze’s transition from SMB-centric backup provider to a high-growth, enterprise-oriented cloud storage platform, with AI storage as the dominant growth vector. Investors should weigh the durability of B2’s growth against the headwinds in legacy backup and the variability inherent in large AI customer ramp-ups.
Key Considerations:
- AI Customer Concentration: Large AI accounts are now material drivers; their ramp and volatility could impact near-term results.
- Margin Sustainability: Hardware life extension and scale are boosting gross margin, but future product mix and capex needs may affect trajectory.
- Go-to-Market Execution: Upmarket sales and customer success investments are yielding results, but continued process and system buildout is required for scale.
- Legacy Segment Drag: Computer Backup faces ongoing secular decline, offsetting some B2 gains and requiring ongoing management attention.
- Capital Allocation Discipline: Share buybacks and credit facility usage are tightly linked to cash flow milestones and prudent growth investment.
Risks
B2’s growth is increasingly dependent on a small number of large, fast-scaling AI customers, introducing revenue concentration and potential volatility if ramp schedules shift. Legacy Computer Backup is in managed decline, with limited pricing power and potential for further attrition. Competitive dynamics remain intense, especially as hyperscalers adjust pricing and new entrants target AI storage. Macro uncertainty and evolving customer preferences for hybrid or multi-cloud storage could also impact demand consistency. Management’s outlook assumes continued AI tailwinds and upmarket momentum, but execution risk remains as the business model pivots.
Forward Outlook
For Q3 2025, Backblaze guided to:
- Revenue of $36.7 to $37.1 million
- B2 revenue growth of 28% to 30%
- Adjusted EBITDA margin of 17% to 19%
For full-year 2025, management raised revenue guidance to:
- $145 to $147 million (from $144 to $146 million previously)
- Adjusted EBITDA margin reiterated at 17% to 19%
Management highlighted:
- Free cash flow positivity remains targeted for Q4
- B2 revenue growth expected to exit the year at or above 30%
Takeaways
B2 cloud storage is now the clear growth engine, with AI demand and enterprise sales transforming Backblaze’s revenue mix and margin profile.
- AI Storage Inflection: The company’s ability to land and expand with AI customers is driving segment acceleration and premium pricing, but introduces concentration risk.
- Operational Discipline: Margin expansion is being delivered through asset optimization and cost control, while reinvestment supports innovation and go-to-market buildout.
- Legacy Headwinds Remain: Computer Backup’s secular decline is managed but persistent; future growth will hinge on B2 execution and further upmarket penetration.
Conclusion
Backblaze’s Q2 results confirm a successful pivot toward high-growth, high-value cloud storage, with AI workloads and enterprise wins now central to the strategy. While execution risk and large-account volatility require monitoring, the business is positioned to deliver profitable growth and operating leverage as it approaches key cash flow milestones.
Industry Read-Through
Backblaze’s results highlight the accelerating demand for independent, cost-predictable cloud storage as AI and data-centric workloads surge. The company’s ability to win AI customers away from hyperscalers underscores growing customer frustration with opaque pricing and egress fees, a theme likely to pressure larger incumbents. Product innovation focused on performance and security is now table stakes for upmarket wins, and the rapid adoption of high-throughput storage tiers signals a broader industry shift toward workload-specific pricing. For storage and infrastructure providers, the message is clear: AI-driven data growth is real, but capturing value requires differentiated offerings, operational discipline, and the agility to serve both direct and channel-led demand.