Elite Cyber-Engineering for
Mid-Market Leadership.
Xellagain is the partner that CISOs and CTOs trust when reliability and security are non-negotiable. From adversarial penetration testing to high-velocity digital engineering, we protect your enterprise and deliver your roadmap with offensive-grade precision.
24-Hour Response
Every inquiry is triaged by a senior engineer within one business day. Guaranteed.
Fixed-Scope Pilots
Zero-risk trial engagements to validate our offensive security and engineering capabilities.
CISO-Led Strategy
Every project is oversighted by practitioners with decades of enterprise leadership experience.
Built for the work that actually matters
Xellagain started in 2017 with a single conviction: most IT firms are too slow, too siloed, or too focused on billable hours to actually move the needle for their clients. Seven years later, we've built a team that operates differently — senior-level engineers, not juniors with senior-level rate cards.
7+
Years in Operation
100+
Projects Shipped
Headquartered in Orange County, CA with a distributed global delivery team — which means your project gets U.S. accountability and around-the-clock execution, at a price that makes sense.
The right team for every layer of your stack
From hardening your perimeter to shipping your next product — we cover the full spectrum of enterprise technology, with specialists in each area rather than generalists who do everything poorly.
App Development
We build web and mobile applications from the ground up — custom to your process, not retrofitted from a template. React, .NET, Node.js, whatever the job calls for.
See How We BuildApp Modernization
Your legacy PHP or .NET system is holding you back — we migrate it to modern architecture without breaking everything in the process.
Modernize Your StackCloud Platform
Azure and AWS architecture, migration, and day-to-day management. Your cloud should save you money — if it isn't, we'll show you exactly why.
Explore Cloud StrategyAI & Innovation
We build real AI products — not chatbots with a company logo. Custom LLM workflows, RAG pipelines, and agent systems that automate actual business decisions.
Explore AI CapabilitiesBI & Data Warehousing
If your data team spends more time pulling reports than reading them, we fix that. Power BI dashboards, data lakes, and pipelines that give leadership the numbers they actually need.
See Data SolutionsInternet of Things
We connect your physical hardware to cloud-based intelligence — from sensor networks to edge computing deployments that work reliably in the field, not just in demos.
IoT CapabilitiesManaged Services
Your systems watched around the clock, incidents handled before they become outages. White-label managed support from $25/hour — no retainer, no minimums on day one.
See Support PlansDynamics 365 / CRM
Off-the-shelf CRM configurations rarely fit real sales processes. We customize Dynamics 365 to match how your team actually sells — not how Microsoft assumes they do.
CRM SolutionsCollaboration & SharePoint
SharePoint rollouts that people actually use. Teams integrations that reduce email, not add to it. We get adoption right the first time.
See Collaboration SolutionsAdvanced Cybersecurity
Managed SOC, red team penetration testing, and breach response. We find the gaps before attackers do — and when the worst happens, we help you recover fast.
See Security ServicesStaff Augmentation
Need three senior engineers by next Monday? We field vetted L2/L3 offshore specialists who slot into your existing team and start contributing within 48 hours.
Build Your TeamSecurity that doesn't just check boxes
Most security programs tell you what's wrong. Ours tell you what an attacker would actually do with it — then we help you close the gap before anyone finds out.
SOC Transformation
Stop drowning in alerts. We tune your SIEM, eliminate log noise, and surface the threats that actually matter.
Explore Managed SOCOffensive Security
Red team operations and penetration testing that go beyond automated scanners. We think like attackers, so you can defend like one too.
Explore Offensive SecurityIncident Response
When a breach happens, reaction time is everything. Our IR team deploys fast, contains the damage, and builds the forensic picture your lawyers and insurers will need.
Explore Digital ForensicsCompliance & Reporting
Monthly SLA reports, cost-per-use analysis, and compliance documentation you can hand straight to your auditor or board.
View ReportingOffshore Staffing Transformation
Affordable, 24/7 security & development experts from $25/hour.
Why Offshore?
Bridge your skill gaps and handle overflow without the overhead of in-house hiring. Our experts integrate seamlessly as an extension of your own team.
Vetted & Certified
Rigorous screening for technical mastery and communication skills.
24/7 Availability
Continuous coverage across time zones, including weekends/holidays.
Direct Reporting
Complete transparency with staff reporting directly to your leads.
Scale Fast
Onboard project teams in days, not months, to meet delivery deadlines.
We provide top-tier, certified engineers fully integrated into your workflow.
Request Staff AuditAI & Product Innovation
From intelligent orchestration to rapid-fire MVP deployment.
Elite AI Engineering
Access the top 1% of AI specialists. We build the "brains" of your next-gen product—from custom LLM architectures to predictive machine learning pipelines that drive real business outcomes.
Explore AI InnovationSaaS Development
Build robust, multi-tenant cloud ecosystems. We architect for scale using high-performance stacks like Python, Node.js, and Go.
Rapid MVP Deployment
Idea to market in record time. We turn complex concepts into high-performing, venture-ready MVPs focused on speed and value validation.
High-Fidelity POCs
De-risk your roadmap. We build high-fidelity proofs of concept to prove technical feasibility and secure stakeholder buy-in early.
What your perimeter looks like from the outside
We simulate the exact techniques real threat actors use — then hand you a clear, prioritized remediation plan.
Penetration Testing
We run full-scope adversarial simulations against your infrastructure — the way a real APT group would, not a checkbox scanner. Every finding comes with exploit evidence and a fix timeline.
Vulnerability Assessment
We map your entire attack surface — cloud, on-prem, SaaS — rank every weakness by real exploitability, and tell you exactly where to focus remediation effort first.
Source Code Review
Your developers are moving fast. That means security flaws get buried in pull requests. We do static and dynamic analysis to catch logic errors before they ship to production.
Phishing Assessment
Your firewall won't stop a well-crafted phishing email. We run targeted social engineering campaigns against your actual staff — and then train the people who clicked so they don't do it again when it counts.
API Security Testing
APIs are the most common breach vector that nobody talks about. We test authentication flows, authorization logic, and data exposure across every endpoint in your stack.
The tools behind the work
We work in production with these platforms — not just in training courses and certifications.
Azure
.NET/C#
PHP
AWS Full Stack
Copilot
Power BI
Python
OpenAI
Burp Suite
Qualys
Metasploit
SonarQube
Kali Linux
React
Node.js
Docker
Kubernetes
Vault
Client Case Studies
Out of respect for client confidentiality and privacy, we do not publicly publish case studies. However, we are happy to provide references and discuss relevant projects and client experiences where permitted, upon request.
Ready to Scale?
Discuss your project goals with our experts and discover how our hybrid model can reduce costs while elevating quality.
Start the Conversation
Whether you need an immediate scoping call or a long-term strategic partnership, our senior engineering team is ready to deliver.