On-Premise & Hybrid Data Security Alternatives

Datastealth team

December 3, 2025

As incumbent data security solutions shift their focus to cloud-only models, many organizations face a critical gap in protecting local and hybrid infrastructure. This trend leaves you searching for a robust alternative that understands the complexities of on-premise data security, unlike many cloud-first solutions. DataStealth provides a true hybrid-first platform, delivering agentless, data-centric protection to neutralize risk across your entire estate, from mainframes to multi-cloud, without demanding disruptive changes to your systems.

Who is This Guide For?

This guide is written for organizations that cannot rely on cloud-only security vendors and need a true on-prem or hybrid-first data protection platform.

  • Highly regulated enterprises in finance, insurance, telecom, healthcare, and retail
    (aligned with your positioning: “Trusted by leading enterprises across finance, insurance, telecom, retail, and healthcare” )

  • Organizations with significant mainframe or legacy systems (z/OS, RACF, IMS, DB2)

  • Companies with strict data residency or sovereignty requirements

  • Security teams that cannot install agents on servers, industrial systems, or critical workloads

  • Hybrid and multi-cloud enterprises need consistent policies across environments

  • Enterprises preparing for a forced migration away from legacy, posture-based tools

DataStealth is best suited for:

  • Large enterprises, especially those with complex on-premises and hybrid infrastructure
  • Organizations with highly distributed systems (e.g., multiple data centers, multiple clouds, etc).
  • Teams with limited engineering bandwidth who need true no-code, agentless data security platforms (DSP) and data protection solutions. 

What a Cloud-First Strategy Means for Your On-Premise Data

A vendor's pivot to a cloud-only model presents a direct challenge to your organization's security posture if you rely on on-premise or hybrid systems. This strategic shift requires you to re-evaluate your data protection strategy to ensure your most critical local data assets are not left exposed. Without a dedicated on-premise solution from your existing vendor, you must find a replacement that can effectively secure the data residing within your own data centers.

Addressing the Migration Deadline

When a vendor announces a strategic shift away from self-hosted solutions, it creates a need for customers to begin planning. While timelines can vary, this industry trend requires IT and security leaders to proactively find, vet, and implement a new platform. The goal is to execute a strategic migration project that avoids any lapse in security coverage for on-premise file servers, databases, and applications.

Your On-Premise Infrastructure is Still Critical

Your organization likely maintains on-premise systems for valid business and regulatory reasons. These may include strict data residency laws, performance requirements for latency-sensitive applications, or deep investments in legacy infrastructure. While considering alternatives, you might evaluate Data Loss Prevention (DLP) tools from vendors like Forcepoint DLP, Trellix DLP, or Symantec DLP. However, many of these solutions still depend on disruptive agents or focus on preventing data egress rather than neutralizing the data itself.

Risk of Security and Visibility Gaps

Relying on a vendor with a cloud-first focus creates potential blind spots for data residing within your own data centers. A platform architected primarily for SaaS applications and cloud storage is likely to lack the deep visibility and native integration capabilities needed to protect complex on-premise environments. This discrepancy can lead to inconsistent security policies and expose your organization to unnecessary risk.

The Complexity of Replacing Incumbent Tools

You now face the challenge of replacing an established platform that has been integrated into your security operations. This process introduces the risk of a complex, costly, and disruptive migration. Your IT and security teams require a seamless transition to a new solution for their  On‑Premise Deployment & Legacy Support , making a low-impact implementation path a critical evaluation criterion.

Why Cloud-First Vendors Fail On-Premise Requirements in 2026

Cloud-first vendors typically lack:

  • Support for legacy protocols (DB2, MQ, SFTP, SOAP, mainframe-specific payloads)
  • Inline, real-time data protection at the network layer
  • Deployment inside air-gapped or restricted environments
  • Consistent multi-region data residency support
  • Ability to function without agents or code changes
  • Comprehensive classification across files, databases, SaaS, and mainframes

Comparing Data Protection Approaches: Posture vs. Data-Centric

This comparison contrasts legacy posture-based models with DataStealth's hybrid-first platform to clarify the critical capability differences for securing on-premise and hybrid environments. By examining the fundamental differences, you can better evaluate why a platform purpose-built for  on-premise security  is necessary for organizations that cannot leave their local data behind.

Legacy Posture-Based Tools vs. DataStealth



Feature / Requirement Legacy Posture-Based Tools DataStealth (Hybrid-First Platform)
Primary Focus Shifting to cloud/SaaS; on-premise solutions are often deprioritized. Provides uniform protection for hybrid, on-premise, mainframe, and multi-cloud environments.
Deployment Model Often agent-based for on-prem, which can be disruptive to your legacy systems. Employs an agentless, "no code changes" architecture at the network layer for minimal operational impact.
Data Protection Method Primarily focused on access governance and threat detection (posture), leaving data exposed if a breach occurs. Utilizes data-centric protection (tokenization, encryption, masking) to neutralize the data itself, protecting it even if your perimeter is compromised.
Legacy System Support Limited to non-existent for your mainframes and complex legacy apps, creating critical coverage gaps. Natively supports your legacy systems, including mainframes (z/OS, RACF), ensuring consistent policies everywhere.
Discovery Method Relies on scheduled jobs that create delays in your visibility. Performs real-time, in-line discovery and protection as your data moves through the network.
Migration Path for On-Prem Users A forced migration to the cloud or finding a new vendor. Offers a seamless, low-disruption migration path for your organization, securing on-premise data immediately.

The core difference lies in the philosophical approach. Legacy tools focus on security posture — i.e., understanding who has access to what data. While valuable, this doesn't protect the data if an attacker bypasses controls. DataStealth operates on an "assume breach" model, using techniques like tokenization to make data unusable to unauthorized parties. This is achieved through an agentless architecture that offers  no code changes, no APIs, and no agents , minimizing operational disruption.

DataStealth vs. Varonis



Feature Varonis DataStealth
Primary Model Access governance / posture Data-centric (tokenization, masking, encryption)
On-Prem Commitment Decreasing; cloud-focused Fully supports on-prem, hybrid, air-gapped
Agents Required Yes No agents, no code changes
Legacy Support Limited Native support for mainframes & legacy workloads
Protection Type Detect & alert Neutralize sensitive data in-line

DataStealth vs. Agent-Based DLP Tools



Feature Agent-Based DLP (Forcepoint / Trellix / Symantec) DataStealth
Deployment Model Endpoint + server agents No agents, no code changes
Primary Focus Egress prevention/posture Data-centric protection (tokenization, masking, encryption)
On-Prem Commitment Still agent-heavy Fully supports on-prem, cloud, hybrid, air-gapped
Legacy Support Low Native mainframe + legacy system support
Performance Impact High (agents) Near-zero (network-layer, inline)
Data Neutralization Not supported Neutralizes data in-line

How DataStealth Delivers Agentless Protection Across All Environments

DataStealth delivers agentless protection by operating at the network layer to inspect data in motion and apply security controls transparently, ensuring comprehensive protection without impacting your systems or applications. This approach secures data across your entire hybrid ecosystem without the overhead of traditional agent-based solutions.

Network-Layer Interception

DataStealth’s platform is deployed as a transparent proxy or via a network tap, placing it in the path of data traffic. By intercepting data at this layer, the platform gains complete visibility into data flows without requiring any software to be installed on endpoints or servers. This method is non-intrusive and preserves the stability and performance of your critical systems.

Real-Time Data Processing

Once intercepted, the data is processed in real time. The platform uses deep content inspection to discover sensitive data patterns you define. As soon as this data is identified, pre-configured protection policies – like tokenization or masking – are applied instantly. The protected data is then forwarded to its original destination, all within microseconds, ensuring no discernible impact on application performance.

Seamless Integration without Agents

This entire process occurs at the network layer, eliminating the need to install agents, refactor application code, or modify legacy systems. This agentless architecture is a critical advantage for protecting sensitive environments like mainframes or specialized industrial control systems where installing third-party software is not feasible.

Consistent Hybrid Enforcement

The network-based architecture enables you to apply a single, consistent set of data protection policies across your entire hybrid infrastructure. The same rule that protects PII from an on-premise application can be applied to data moving into a SaaS platform. This unified enforcement eliminates security gaps, allowing you to pair posture/runtime tools with in‑line data protection across clouds and on‑prem systems.

Deployment Models

DataStealth supports all major deployment patterns:

  • Inline gateway or reverse proxy
  • Database proxy (SQL, NoSQL, JSON)
  • Sidecar within service mesh
  • Batch & streaming workers (Kafka, ETL, pipelines)
  • SDKs for optional direct integration
  • On-prem, cloud, multi-cloud, hybrid
  • Air-gapped and restricted networks

Simplify PCI, HIPAA, and GDPR Compliance with Tokenization and Masking

DataStealth simplifies compliance with regulations such as PCI DSS, HIPAA, and GDPR by leveraging advanced tokenization and masking to reduce the audit scope of your on-premises systems. By de-identifying data before it is stored or processed, you can remove systems from stringent regulatory requirements, reducing compliance costs and effort.

Reduce Audit Scope with Tokenization

DataStealth’s format-preserving tokenization & data protection features  replace sensitive data elements—such as Primary Account Numbers (PANs) or Protected Health Information (PHI)—with non-sensitive tokens. Because the tokenized data is not considered sensitive, any on-premise system that only handles tokens may be removed from your audit scope. As noted by Microsoft, " tokenization is a data security technique that can reduce the PCI audit scope ."

Protect Data in Non-Production Environments

DataStealth protects data in non-production environments by applying static data masking to create realistic, de-identified datasets. Your development and testing environments are often a hidden source of compliance risk. This process allows your developers and QA teams to work with high-fidelity data that maintains referential integrity without ever exposing real sensitive information, satisfying key data minimization principles under GDPR.

Maintain Auditable Governance

DataStealth maintains auditable governance by providing a centralized policy engine with granular controls and logging every access request and protection action. Every request and action is logged, creating a complete audit trail. This makes it straightforward to demonstrate to auditors that you have robust, policy-driven governance in place to protect sensitive data.

Solve Data Residency Challenges

DataStealth solves data residency challenges by tokenizing data within a specific geographic region before it is transferred to other services. This ensures that sensitive, regulated data never physically leaves its country of origin, while the business can still leverage global services using the non-sensitive tokens for processing and analysis.

PCI Compliance Enhancements

DataStealth is a PCI Level 1 Service Provider and a Participating Principal Organization helping shape PCI standards.

DataStealth PCI Capabilities:

  • Payment card tokenization (reduce audit scope up to 90%)
  • eSkimming protection
  • iFrame/form protection
  • PCI card discovery (requirement 12.5.2)
  • Support for on-prem, legacy, and multi-cloud card flows

Securing Your Critical Mainframe and Legacy Infrastructure

DataStealth secures your most critical mainframe and legacy systems by applying data-centric protection without requiring disruptive changes. Mainframes remain the operational core for many enterprises, yet they are often a blind spot for cloud-first security vendors and some traditional on-premise tools.

Protect Data, Not Just Access

Our platform provides a crucial layer of security that complements your existing mainframe access control and encryption tools. While access controls like  Broadcom CA ACF2  manage permissions, data masking solutions like  IBM InfoSphere Optim  prepare test data, and products like  Thales CipherTrust Transparent Encryption  handle data at rest, DataStealth protects your data in-motion with real-time tokenization. This neutralizes sensitive information before it lands in your mainframe databases, ensuring that even if access controls fail, the data itself remains worthless.

Non-Invasive Mainframe Support

DataStealth provides non-invasive mainframe support by protecting these environments without installing any agents or software on these sensitive systems. As explained in our agentless architecture, the platform operates at the network level, ensuring there is no impact on mainframe performance or stability while extending modern data protection to your most critical legacy assets.

Bridge the Hybrid Security Gap

The platform allows you to enforce a single, unified data protection policy across your entire hybrid environment. For mainframes, this means the data processed by legacy COBOL applications is protected with the same rules as data in your modern cloud services, eliminating governance gaps between old and new systems.

Future-Proof Your Legacy Systems

DataStealth future-proofs your legacy systems by acting as a security gateway, ensuring that sensitive data leaving the mainframe remains secure throughout its entire lifecycle. As organizations integrate mainframes with modern applications, this protection becomes essential. The Open Mainframe Project notes that " mainframes remain mission‑critical...reinforcing demand for solutions that protect mainframe data without massive app rewrites ."

DataStealth Environment and Integration Compatibility 

Extended Mainframe Support

DataStealth protects:

  • DB2, IMS, CICS, RACF-protected datasets
  • z/OS mainframe endpoints
  • COBOL applications without modification
  • Legacy protocols (FTP/S, MQ, custom sockets, SMTP)

Supported Integration Points

  • Web/API (HTTP, HTTPS, REST, GraphQL, gRPC)
  • Databases (SQL Server, Oracle, PostgreSQL, DB2, MySQL, Cassandra, MongoDB, DynamoDB)
  • File stores (NFS, CIFS, SMB, S3, Blob, GCS, SharePoint)
  • Messaging systems (Kafka, MQ, Kinesis, Pub/Sub)
  • SaaS applications
  • Logs and observability tools (Splunk, ELK, SIEM pipelines)

Key Management Integrations

  • AWS KMS, Azure Key Vault, GCP KMS
  • On-prem HSM
  • BYOK / HYOK
  • Dual control and audited access

Industry-Specific Support Available For:

  • Finance: Protect payment data, account numbers, and PII across core banking, card processing, and legacy financial systems.

  • Insurance: Safeguard policy data, claims, underwriting workflows, and PHI across decades-old systems + modern SaaS.
  • Telecom: Protect subscriber data, call detail records, and high-throughput message streams with low-latency tokenization.
  • Healthcare: Protect PHI, EHR, DICOM, and HIPAA-regulated data, while reducing scope for non-production datasets.
  • Retail: Tokenize PCI, loyalty, and customer data while blocking eSkimming attacks in real time.
  • Travel & Hospitality: Protect traveller PII, passport data, and reservation systems across hybrid environments.

Testimonials About DataStealth

“Effortless Data Protection with Robust Support”

“I have been using DataStealth for over five years and appreciate the ease of the environment setup, especially as we collaborated closely with the DataStealth team to determine the size and scope of the project. The team’s involvement in configurations and product setup was seamless and efficient. I find the support team consistently available and ready to assist, which contributed to a positive experience. DataStealth prominently solves problems like tokenization, inline database and application masking, test data management, and PCI compliance, benefiting my organization significantly. Once configured, DataStealth operates autonomously with minimal input required, except for patching and vulnerability management, which streamlines my workflow tremendously. Moreover, I value that it is a single product offering multiple use cases and solutions that cater to diverse needs within our operations.” (G2 Reviews)

“Great Technology and Service Provider”

“What I liked best was their solid suite of products that not only protected our systems from risk but also helped us stay compliant with a range of standards and regulations. On top of that, their team quickly became trusted partners—sharp, reliable, and clearly invested in our success.” (G2 Reviews)

Platform Best For Key Limitation Why Choose DataStealth Instead
Varonis Access governance Reduced on-prem focus Need data-centric protection & hybrid deployment
Symantec DLP Endpoint DLP Agent-heavy Want agentless, inline protection
Trellix DLP Enterprise DLP Limited legacy support Need mainframe/native legacy protection
Forcepoint DLP Egress control Data neutralization not included Need tokenization + compliance scope reduction
IBM Guardium Database protection Complex deployments Want seamless deployment without code changes

Your Transition Plan to DataStealth

DataStealth offers a low-disruption migration path for customers moving from legacy on-premise solutions, focused on rapid deployment and immediate risk reduction.

  1. Deploy Agentlessly: Stand up the DataStealth platform at the network layer. The agentless nature allows for a significantly faster deployment compared to traditional systems, enabling rapid risk reduction.

  1. Discover and Classify: Gain real-time visibility into sensitive data flows across your on-premise and hybrid environments, identifying where critical data exists and how it is used.

  1. Map and Apply Policies: Centrally define and apply data protection policies (tokenization, masking, encryption) to neutralize sensitive data before it reaches applications or databases.

  1. Implement Governance Controls: Configure granular, policy-based controls for detokenization and data access, ensuring only authorized users and processes can view sensitive data.

  1. Monitor and Validate: Use unified dashboards and audit logs to continuously monitor data protection status and generate evidence for compliance.

DataStealth's core technology is designed to accelerate your time-to-value and empower your team to quickly and independently secure your on-premises data.

FAQs

This section addresses common questions about transitioning from legacy platforms and implementing agentless, data-centric security.


1. How does DataStealth's on-prem approach differ from agent-based posture management tools?


Unlike agent-based tools that focus on posture, DataStealth is fundamentally agentless. It protects your data in motion at the network layer, neutralizing it before it lands in files or databases. This provides real-time protection without the performance overhead or deployment complexity of agents.


2. Will DataStealth require disruptive changes to my applications?


No. DataStealth’s “no code, no APIs, no agents” architecture is designed for zero disruption. It integrates transparently at the network level, so your applications and infrastructure continue to operate without any modification.


3. How does DataStealth reduce PCI and HIPAA audit scope?


By replacing sensitive data with unusable tokens, DataStealth removes raw data from your on-premise systems. This enables you to de-scope those systems from many PCI DSS and HIPAA requirements, simplifying audits and reducing compliance overhead.


4. Can DataStealth protect data on my mainframe?


Yes. DataStealth provides native, agentless support for mainframe environments. It protects data flowing to and from your mainframe applications without requiring any software installation on z/OS, preserving stability and performance.


5. Can DataStealth integrate with SIEM tools?


Yes. Structured logs and audit events integrate with Splunk, ELK, and all major SIEM/SOC workflows.


6. Does DataStealth replace legacy masking tools?


Yes. It supports static and dynamic masking with referential integrity, date shifting, and deterministic masking options.


7. Can DataStealth protect data lakes?


Yes — through batch and streaming workers for ETL pipelines, lakehouses, S3/Blob/GCS storage, and analytics workloads.


8. Is DataStealth suitable for organizations with multi-cloud and hybrid deployments?


Yes — it supports AWS, Azure, GCP, local KMS/HSM, and unified governance across hybrid and multi-cloud estates.


Secure Your Future: Comprehensive Data Protection

Securing your future in a hybrid world requires a forward-thinking, data-centric platform that protects your on-premise infrastructure long after cloud-only vendors have moved on. For organizations with vital on-premise and hybrid systems, DataStealth provides the essential continuity, deep visibility, and robust protection needed to thrive in the face of evolving threats. By adopting an "assume breach" philosophy and protecting the data itself, you can neutralize risk, streamline compliance, and secure your data wherever it lives.

See how DataStealth can enhance your data security posture.

Request a Demo →

About DataStealth

DataStealth is a unified Data Security Platform that discovers, classifies, and protects sensitive data across on-premise, cloud, SaaS, and legacy systems—without agents, integrations, or code changes. Its patented platform applies tokenization, masking, encryption, and fragmentation to neutralize sensitive data, simplify compliance, and reduce breach impact.

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