StoneFly
StoneFly, Inc. is a privately held enterprise storage and disaster recovery infrastructure provider founded in 1996, selling proprietary StoneFusion-powered NAS, SAN, S3 object, HCI, backup/DR, and security appliances to mid-market and regulated-industry customers globally.
- Company typePrivate
- Founded1996
- HeadquartersCastro Valley, United States
- Headcount51–100
- GTM typeB2B
- OfferingHardware or Manufacturing
What StoneFly does
StoneFly, Inc. is a privately held enterprise storage infrastructure provider founded in 1996 in Castro Valley, California. The company claims to have invented the iSCSI storage protocol in 1996 and has developed a portfolio built on its proprietary 8th-generation StoneFusion storage virtualization operating system, which is protected by four US patents (7302500, 7555586, 7558885, 8069292). Its product range spans NAS, SAN, S3-compatible object storage, unified storage appliances (USO), hyper-converged infrastructure (USS HCI, TwinHCI, M1, SVP), and specialized backup and disaster recovery appliances (DR365V, DR365H, DR365R, DR365U, DR365VIVA), with the patented Air-Gapped Vault ransomware-protection technology serving as a key differentiator. The company also markets AI-branded appliances including AI LogPro X1, AI SandboxHub, and NVIDIA GPU-powered AI servers, plus the 365GDR unified cyber defense platform and SA365 XDR/SIEM security appliance.
StoneFly serves mid-market and enterprise customers across regulated industries (financial services, healthcare, government/defense) and general enterprise IT, with named customers including the US Navy, Defense Intelligence Agency, WWF-Canada, a regional healthcare system with 1,200 beds, and Ecker Enterprises. It monetizes primarily through one-time hardware appliance sales with starting prices of $1,495 to $2,895, supplemented by subscription-based StoneFusion software licensing at $10 per TB per month plus $2 per host per month, 24/7 premium support services, and channel partner resale. The 51-100 employee company distributes through a hybrid model combining direct enterprise field sales for government and large enterprise accounts, an online e-commerce storefront for self-service mid-market buyers, and technology partner channels including Veeam Ready certification, Silver Partnership with Proxmox VE, and expanded integration with HYCU.
StoneFly's regulatory compliance certifications (SEC Rule 17a-4(f), FINRA Rule 4511, CFTC Rule 1.31, HIPAA, HITECH, FedRAMP via Microsoft Azure, ISO 27001) create structural entry barriers for regulated verticals, while DCIG Top 5 analyst recognition across block, file, object, and modern SDS categories for 2025-2026 and 5 consecutive years on the CRN Storage 100 list support channel and marketing credibility. The company has been self-funded since a single 2003 venture round of $12 million led by Rustic Canyon Partners and remains founder-led under President/CEO Mo Tahmasebi and Co-founder/CFO Macy Tafreshian.
StoneFly firmographics
Firmographics- Name
- StoneFly
- Legal name
- StoneFly, Inc.
- Website
- https://stonefly.com
- Company type
- Private
- Founded year
- 1996
- Operating status
- Operating
- Headcount range
- 51–100 employees
- Short description
- StoneFly, Inc. is a privately held enterprise storage and disaster recovery infrastructure provider founded in 1996, selling proprietary StoneFusion-powered NAS, SAN, S3 object, HCI, backup/DR, and security appliances to mid-market and regulated-industry customers globally.
- Ownership category
- akta.pro rank
StoneFly industry classification
Industry- Product category
- Enterprise Storage Appliances
- NAICS
- Computer Storage Device Manufacturing (334112), Computer Systems Design and Related Services (5415)
- SIC
- Computer Storage Devices (3572)
- akta.pro primary industry
- Data Protection & Backup Appliances (Backup Targets, Dedup Appliances) (HDACACAI)
- akta.pro secondary industries
- Immutable Backup, Air-Gap & Ransomware Recovery (HDABAIAJ), Backup Appliances & Integrated Systems (HDABAEAE), Hyperconverged & Software-Defined Storage Appliances (HCI/SDS Hardware) (HDACACAJ), Hybrid Cloud Storage & Backup Infrastructure (HDABAMAG)
Keywords
Where StoneFly is headquartered
LocationHeadquarters
- HQ city
- Castro Valley
- HQ country
- United States
- HQ region
- North America
Offices1 record
Markets served
StoneFly business model
Business model- GTM type
- B2B
- Offering type
- Hardware or Manufacturing
- Cost components
- Supply Chain, Technology or R&D, Personnel, Marketing or Sales, Operations, Infrastructure
Revenue model
- Hardware Appliance Sales: Sale of physical storage, disaster recovery, and HCI appliances as one-time purchases. Products include NAS Storage ($2,495+), SAN Appliances ($2,895+), S3 Object Storage ($2,495+), and M1 HCI ($1,495+).
- Software Licensing and Subscription: StoneFusion storage OS licensing at $10 per TB monthly plus $2 per host. Software includes SourceConnect connectors, AI security tools, and XDR/SIEM capabilities with subscription pricing.
- Support and Maintenance Services: 24/7 Premium Support available for all products with contractual SLAs.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| One time/ perpetual license | Pay-as-you-go | NAS Storage Appliance - Entry-level network attached storage |
| One time/ perpetual license | Pay-as-you-go | 10th Gen SAN Appliances - Enterprise block storage |
| One time/ perpetual license | Pay-as-you-go | S3 Object Storage Appliance |
| One time/ perpetual license | Pay-as-you-go | M1 Hyper-Converged Infrastructure |
| Subscription | Monthly | StoneFusion Storage OS - Software licensing |
Go-to-market motion3 records
Distribution channels3 records
Marketing channels4 records
StoneFly product offering
Product offeringCore offering
StoneFly designs, manufactures, and sells enterprise storage, backup/disaster recovery, hyperconverged infrastructure, and security appliances powered by its proprietary 8th-generation StoneFusion storage virtualization operating system. The portfolio spans NAS, SAN, S3 object, and unified storage appliances (USO), DR365-series backup/DR appliances integrated with Veeam/HYCU/Rubrik, 365GDR and SA365 security appliances, HCI systems, and cloud storage offerings for Azure, AWS, and StoneFly Private Cloud. A patented Air-Gapped Vault underpins ransomware-proof immutable storage, and SourceConnect extends the platform with replication and analytics across 300+ data sources.
Product overview
StoneFly offers a comprehensive enterprise storage platform with multiple integrated product lines built on the patented 8th generation StoneFusion storage operating system. The portfolio spans storage (NAS, SAN, S3 Object Storage, Unified USO), backup and disaster recovery (DR365V, DR365H, DR365R, DR365VS, DR365U, DR365VIVA), security (365GDR, SA365), hyperconverged infrastructure (USS HCI, Proxmox VE Appliance, TwinHCI, SVP), cloud storage (Azure, AWS, StoneFly Private Cloud), and AI products (AI Servers, AI LogPro X1, AI SandboxHub). SourceConnect extends the platform with replication, analytics, and backup from 300+ data sources. Key differentiators include the patented Air-Gapped Vault for ransomware protection and deep integrations with leading backup software (Veeam, HYCU, Rubrik, Commvault, Veritas) and virtualization platforms (VMware, Hyper-V, Proxmox VE, KVM, Citrix).
Differentiator
Problem solved
Functional benefit
Brands
- StoneFusion: Patented 8th generation storage virtualization software operating system for NAS, SAN, and S3 object storage
- DR365V
- DR365H
- DR365R
- DR365U
- 365GDR
- SA365
- SourceConnect
- Air-Gapped Vault
- StoneFusion MSP Edition
- StoneWAN
- Voyager
- ISC (Integrated Storage Concentrator)
- Stor365
- FlexStor ScaleHA
- AI LogPro X1
- AI SandboxHub
Products and services
- StoneFusion Storage Operating System Patented 8th-generation storage virtualization operating system that transforms bare-metal servers into enterprise NAS, SAN, S3 object storage, or unified storage appliances with integrated ransomware protection, storage optimization, and monitoring. Licensed at $10 per TB per month plus $2 per host per month.
- NAS Storage Appliances Enterprise NAS storage appliances (8 to 108-bay) supporting NFS and CIFS/SMB protocols with ransomware protection, deduplication, immutability, and built-in cloud gateway to Azure, AWS, and StoneFly Private Cloud. Starting at $2,495.
- SAN Storage Appliances Enterprise iSCSI and Fibre Channel SAN storage appliances (8 to 108-bay) with petabyte-scale capacity, deduplication, thin provisioning, FlashCache, and high-availability Voyager configurations. Starting at $2,895.
- S3 Object Storage Appliances Amazon S3-compatible object storage appliances (XS-Series and XD-Series) for backup repositories, archiving, and unstructured data with Air-Gapped Vault and immutability. Starting at $2,495.
- USO Unified Storage Appliance Unified SAN, NAS, and S3 object storage appliance consolidating block, file, and object storage into a single scalable system with ransomware defense and hybrid cloud integration.
- StoneFly M1 Mini Appliance High-performance mini storage, HCI, and backup/DR appliance with Intel 13th Gen processor, up to 96GB memory, built-in NVMe flash, and patented air-gapped immutable storage. Starting at $1,495.
- DR365V Veeam Ready Backup & DR Appliance Veeam Ready certified backup and disaster recovery appliance with agentless subnet routing framework, Air-Gapped Vault, and policy-based immutability for ransomware protection.
- DR365H HYCU-Integrated Backup & DR Appliance
Quantifiable outcome
- 91% user satisfaction rating as reported by third-party review platform
- +4 more outcomes
Companies that use StoneFly
Customer profileNamed customers5 records
Segments3 records
Ideal customer profiles4 records
StoneFly technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Integration37 records
AI capability9 records
Feature12 records
StoneFly partnerships and signals
Strategic signalPartnerships
Six partnerships are on record, tiered silver partner, core partner, certified partner and technology partner.
- Proxmox VEsilver partnerSilver Partner status in Proxmox VE ecosystem. StoneFly DR365V disaster recovery appliance certified and integrated with Proxmox VE virtualization platform. Enables joint go-to-market for Proxmox users requiring enterprise storage and DR capabilities.
- HYCUcore partnerExpanded partnership with HYCU for backup and recovery solutions integration. HYCU R-Cloud platform integration enables multi-cloud data protection with StoneFly storage appliances. Joint customers include enterprise and government organizations.
- Veeam Softwarecertified partnerVeeam Ready certification for Object and Repository on M1 and USO platforms. StoneFly storage appliances validated for use with Veeam backup and replication software. Joint customers span mid-market and enterprise segments.
- Microsoft Azuretechnology partnerCloud connectivity integration with Microsoft Azure. StoneFly appliances support Azure cloud tiering and disaster recovery to Azure. Licensing options include Full (iSCSI + NAS), iSCSI only, and Scale Out NAS configurations for Azure deployment.
- Amazon Web Services (AWS)technology partnerCloud connectivity integration with AWS. StoneFly appliances support AWS cloud tiering and disaster recovery to AWS. Licensing options include Full (iSCSI + NAS), iSCSI only, and Scale Out NAS configurations for AWS deployment.
- VMwaretechnology partnerTechnology partnership for virtualization integration. StoneFly storage appliances integrate with VMware vSphere and vSAN environments. DR365V disaster recovery designed for VMware virtualized infrastructure.
Scale indicators4 records
Recent moves6 records
Expansion highlights6 records
StoneFly competitors and assessment
Company assessmentDirect peers
- Rubrik: Rubrik provides data security, backup, and disaster recovery with strong ransomware protection and appliance offerings (R8500 series). StoneFly's DR365R is explicitly Rubrik-integrated, making Rubrik a closely comparable direct competitor in backup-and-DR appliances.
- Cohesity: Cohesity delivers converged backup, DR, file/object services, and data security with integrated ransomware protection — directly competing with StoneFly's DR365 backup/DR appliances, unified storage, and Air-Gapped Vault positioning.
- Scality: Scality offers S3-compatible object storage solutions for backup, archive, and unstructured data — directly comparable to StoneFly's S3 Object Storage appliances and Air-Gapped Vault positioning in the backup target use case.
- Qumulo: Qumulo provides file and object data management for enterprise and mid-market customers, with similar scale and customer profile to StoneFly. They overlap in NAS and S3-compatible object storage for backup and archival use cases.
Broad incumbents
- Nutanix: Nutanix is a leader in hyperconverged infrastructure (HCI) with integrated storage, compute, and backup. Comparable to StoneFly's M1 HCI, USS HCI, and TwinHCI appliance offerings, though at far greater scale.
- Pure Storage: Pure Storage competes in enterprise all-flash block and unified storage, with growing ransomware protection features. Comparable in storage category but positioned at a higher price point and larger enterprise tier than StoneFly.
- Dell Technologies (PowerStore / PowerProtect): Dell's PowerStore and PowerProtect lines cover enterprise block storage and backup targets at massive scale. They overlap broadly with StoneFly's SAN, NAS, and backup appliance portfolio but with a much wider global footprint and enterprise sales motion.
- NetApp: NetApp is a leading enterprise hybrid cloud storage vendor with ONTAP-based unified storage and strong mid-market and enterprise presence — overlapping directly with StoneFly's NAS/SAN/unified storage appliance positioning, though at vastly larger scale.
- HPE (Nimble / Alletra): HPE's Alletra and Nimble Storage lines offer enterprise block and unified storage with backup integration. Comparable in target customer (mid-market and enterprise) but vastly larger in scale, partner ecosystem, and product breadth.
Emerging players
- HYCU: HYCU provides backup and disaster recovery as a service, with appliance integrations (StoneFly DR365H). Smaller and more focused than StoneFly, they are simultaneously a partner and a competitor in the backup/DR appliance and SaaS category.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat5 records
Key risks7 records
Key highlights7 records
Customer concentration
StoneFly social profiles
Digital presenceStoneFly compliance and trust
Trust signalCompliance15 records
StoneFly financial estimates
Financial estimateRevenue estimate
Valuation estimate
StoneFly leadership team
Management profileNumber of profiles
Profiles2 records
StoneFly funding detail
Funding detailFunding overview
Funding rounds1 record
Investors3 records
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
StoneFly M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about StoneFly
What does StoneFly do?
StoneFly designs, manufactures, and sells enterprise storage, backup/disaster recovery, hyperconverged infrastructure, and security appliances powered by its proprietary 8th-generation StoneFusion storage virtualization operating system. The portfolio spans NAS, SAN, S3 object, and unified storage appliances (USO), DR365-series backup/DR appliances integrated with Veeam/HYCU/Rubrik, 365GDR and SA365 security appliances, HCI systems, and cloud storage offerings for Azure, AWS, and StoneFly Private Cloud. A patented Air-Gapped Vault underpins ransomware-proof immutable storage, and SourceConnect extends the platform with replication and analytics across 300+ data sources.
Is StoneFly a public or private company?
StoneFly is a private company. It is classified as founder individual operated bootstrapped and is currently operating.
When was StoneFly founded?
StoneFly was founded in 1996. It employs 51 to 100 people.
Where is StoneFly based?
StoneFly is headquartered in Castro Valley, United States, in the North America region.
How does StoneFly make money?
Three revenue lines are on record. Hardware Appliance Sales are the primary driver. The others are software Licensing and Subscription and support and Maintenance Services.
Who are StoneFly's main competitors?
Direct peers on record are Rubrik, Cohesity, Scality and Qumulo. Broad incumbents are Nutanix, Pure Storage, Dell Technologies (PowerStore / PowerProtect), NetApp and HPE (Nimble / Alletra). HYCU is listed as an emerging player.
Does StoneFly have an API?
No public API is recorded for StoneFly.
What industry is StoneFly in?
StoneFly's product category is Enterprise Storage Appliances. Its primary akta.pro industry code is HDACACAI, Data Protection & Backup Appliances (Backup Targets, Dedup Appliances), with a secondary code of HDABAIAJ, Immutable Backup, Air-Gap & Ransomware Recovery. Its NAICS code is 334112 and its SIC code is 3572.