Solutions
Software testing services
Release better software with greater confidence. CACI combines quality engineering, independent assurance and end-to-end testing to reduce delivery risk, prevent costly defects and improve every user experience.
Build quality into every stage with software testing services
Software failures do more than disrupt delivery. They erode user trust, increase support costs, create security and compliance risks, and slow down the next release.
CACI’s software testing services help you identify problems earlier and make quality a continuous part of delivery. We bring together test strategy, functional and non-functional testing, test management, user acceptance testing and independent assurance across new applications, legacy platforms and complex digital ecosystems.
Whether you need to strengthen an existing QA function, assure a critical programme or provide end-to-end application testing services, we work as an extension of your team. The result is clearer evidence, faster feedback and the confidence to release software that performs as intended in the real world.
Our software testing and QA services
From individual applications to interconnected technology estates, we tailor the scope, methods and level of assurance to your users, risks and delivery priorities.
Functional testing
Verify that applications, features and end-to-end journeys work against business requirements and acceptance criteria. We combine structured manual testing with automation where it delivers value, covering system, integration, regression and compatibility testing.
Performance and resilience testing
Understand how software, infrastructure, networks and interfaces behave under real-world and peak demand. We identify bottlenecks, breaking points and capacity constraints, then provide actionable recommendations to improve performance, scalability, availability and resilience.
Test automation
Accelerate repeatable testing and shorten feedback cycles with maintainable automation integrated into your delivery process. For strategy, framework engineering, CI/CD integration and regression automation, explore our dedicated test automation services.
Test assurance
Gain an independent view of whether your testing is complete, effective and proportionate to risk. We assess strategies, plans, tooling, execution, reporting and supplier activity, giving decision-makers clear evidence of readiness and any unresolved exposure.
Accessibility and usability testing
Create inclusive digital services that people can use confidently. We assess user journeys, interactions and content against user needs and recognised accessibility standards, including WCAG 2.2, and provide prioritised recommendations for improvement.
User acceptance testing
Prepare business users to validate whether software supports real tasks, processes and outcomes. We help define the UAT approach, scenarios, data, governance and defect process so acceptance decisions are based on representative evidence rather than assumption.
Software testing that turn quality into delivery confidence
Quality is not simply the absence of defects. It is the evidence that your software is fit for purpose, safe to release and ready to deliver the intended outcome.
Reduce avoidable release risk
Prioritise testing around critical journeys, dependencies and failure impact, so the issues most likely to harm users or operations receive the right attention before go-live.
Find defects earlier
Introduce validation throughout the software development lifecycle to shorten feedback loops, reduce late rework and prevent defects from becoming expensive production incidents.
Accelerate software delivery
Combine risk-based testing, effective test data and appropriate automation to remove avoidable bottlenecks without lowering quality gates or compromising governance.
Improve user trust
Validate functionality, usability, accessibility, performance and reliability across realistic scenarios, helping users complete important tasks successfully and consistently.
Strengthen governance
Create traceability from requirements and acceptance criteria through test cases, defects and release decisions, producing clearer evidence for delivery leaders, risk owners and auditors.
Build lasting capability
Improve the processes, frameworks, skills and metrics behind testing—not only the immediate release—so your organisation can sustain quality as applications and delivery models evolve.
Software testing across critical areas of delivery
Functional testing
Verify that applications, integrations and end-to-end user journeys meet requirements and acceptance criteria. We combine exploratory, system, integration, regression and compatibility testing with test-case design, test data and defect management to identify issues earlier and improve release confidence.
Performance and resilience testing
Confirm that applications, cloud environments, infrastructure and interfaces perform reliably under real-world conditions. Our non-functional testing covers performance, load, stress, scalability, resilience, failover, accessibility and operational acceptance testing to expose bottlenecks, capacity constraints and potential points of failure.
Independent test assurance
Gain an objective view of testing quality and release readiness. We review test strategies, coverage, automation frameworks, tooling, traceability, defects, reporting, quality gates and supplier activity to expose gaps, clarify residual risk and support confident go-live decisions.
Software testing across critical areas of delivery
Our approach adapts to your delivery model while maintaining clear ownership, traceability and measurable quality outcomes.
1. Understand the risk
We establish the business outcomes, critical user journeys, architecture, dependencies, regulatory obligations, release cadence and consequences of failure.
2. Assess the current position
We review requirements, test coverage, processes, environments, data, tooling, defects and delivery constraints to identify the most important gaps.
3. Design the test strategy
We define the scope, test levels, techniques, quality gates, responsibilities, environments, data requirements, evidence and reporting appropriate to the risk.
4. Prepare and execute
Our teams design and run tests, manage defects and coordinate with engineering, product, business users and suppliers to keep feedback flowing and issues moving towards resolution.
5. Assure release readiness
We consolidate evidence, expose unresolved risks and provide a clear view of coverage, defect status and readiness to support accountable release decisions.
6. Improve continuously
We use delivery insight and quality metrics to refine coverage, remove bottlenecks, increase useful automation and strengthen capability over time.
Applications and environments we test
We support quality across new development, transformation and live services, including:
- Web, mobile and enterprise applications
- APIs, microservices and systems integrations
- Cloud-native and hybrid environments
- Legacy application modernisation and migration
- Customer and employee portals
- Data-intensive platforms and complex workflows
- Third-party products and multi-supplier programmes
- Public services and regulated environments
Why choose CACI for software testing services?
Quality engineering, not isolated test execution
We connect testing with requirements, architecture, engineering, delivery and service outcomes, helping prevent defects rather than only detect them later.
Independent thinking
We provide clear, evidence-based challenge when testing, supplier activity or release decisions need objective assurance.
Built for complexity
Our teams understand interconnected platforms, legacy estates, cloud environments and multi-supplier programmes where quality depends on the complete service.
Risk-based and outcome-focused
We direct effort towards the journeys, controls and failure modes that matter most, avoiding unnecessary testing while protecting critical outcomes.
Flexible delivery
Engage us for a targeted assessment, additional specialist capability, independent assurance, a dedicated test team or an end-to-end managed testing service.
Knowledge that stays with you
We create reusable assets, transparent reporting and practical ways of working that strengthen your internal capability and support continuous improvement.
Accelerate software quality with test automation services
Manual testing alone can struggle to keep pace with frequent releases, complex applications and growing testing requirements.
CACI’s test automation services help you reduce repetitive testing, accelerate feedback and improve test coverage. From automated functional and regression testing to API testing and continuous integration, we help embed automation into your software delivery lifecycle.
Whether you’re introducing test automation for the first time or improving an existing framework, our specialists help you build a scalable approach that supports faster releases without compromising quality.
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FAQs
Answers to common questions about software testing services.
Software testing services help organisations verify that applications, systems and digital services meet functional, technical and user requirements before and after release. They can include test strategy, functional testing, integration testing, regression testing, performance testing, accessibility testing, UAT, defect management, automation and independent assurance.
A complete service should cover more than test execution. It should define priorities according to business risk, create appropriate environments and test data, maintain traceability to requirements, report clear evidence and support accountable release decisions. The objective is to prevent avoidable failures and give stakeholders confidence that software is fit for purpose.
Software testing evaluates a product or service to find defects and confirm that it behaves as expected. Quality assurance is broader: it improves the processes, standards and controls used to prevent defects throughout the software development lifecycle.
In practice, effective QA testing services combine both. Teams validate requirements, plan coverage, design and execute tests, manage defects, introduce quality gates and use evidence to improve delivery. Testing asks whether the software works; quality assurance also asks whether the organisation is consistently building and releasing software in a controlled, reliable way.
CACI provides functional and non-functional testing, system and integration testing, regression testing, performance and resilience testing, accessibility and usability testing, user acceptance testing, test management, defect management, test automation and independent test assurance.
The exact scope depends on the application, architecture, users, regulatory environment, release cadence and consequences of failure. We can support a specific phase or capability, provide independent oversight, augment an existing team or take responsibility for an end-to-end testing service.
Functional testing verifies that software features, business rules, integrations and user journeys operate according to defined requirements and acceptance criteria. It can include component, system, integration, end-to-end, regression and user acceptance testing.
Testers use representative scenarios and data to compare actual behaviour with the expected result. Manual exploration is valuable when human judgement is required, while stable and repeatable checks may be automated. The aim is to confirm that users can complete the right tasks and that connected systems exchange and process information correctly.
Non-functional testing evaluates how well a system works rather than only whether its features work. It can assess performance, load, stress, scalability, resilience, security, usability, accessibility, compatibility, recovery and operational readiness.
This testing is important because an application may meet its functional requirements but still respond slowly, fail under peak demand, exclude users or recover poorly from disruption. The appropriate test types and acceptance thresholds should be based on expected usage, service-level requirements, technical architecture and business impact.
Software testing should begin during discovery and requirements definition, not after development is complete. Early involvement helps teams clarify acceptance criteria, identify testability issues, plan environments and data, and expose ambiguous or conflicting requirements before they become code.
This shift-left approach does not mean running every test earlier. It means applying the right quality activity at the earliest useful point and continuing testing throughout development, integration, release and live operation. Earlier feedback generally reduces rework and makes quality easier to manage.
The right balance depends on repeatability, stability, risk, frequency and the value of human judgement. Automation is usually well suited to stable regression checks, API validation, high-volume data combinations and tests that must run frequently within CI/CD pipelines.
Manual testing remains valuable for exploratory work, new or rapidly changing functionality, usability, complex visual behaviour and scenarios where judgement matters. CACI selects the approach according to expected return and evidence required, rather than pursuing automation as an end in itself.
Timescales depend on application complexity, quality of requirements, integrations, risk, test scope, environments, data and the number and severity of defects discovered. A focused assessment or test phase may take a few weeks, while assurance for a complex transformation can continue across multiple releases.
CACI establishes priorities and entry and exit criteria early, then aligns testing with the delivery plan. Risk-based testing, earlier validation, reusable test assets and appropriate automation can shorten feedback cycles while protecting the coverage needed for a responsible release decision.
The cost of software testing services depends on the scope, application estate, complexity, regulatory obligations, delivery timescale, environments, specialist test types and engagement model. A targeted health check or assurance review requires a different level of investment from an end-to-end managed testing service.
CACI first identifies the outcomes, risks and existing capability, then recommends a proportionate approach. This keeps investment focused on the testing most likely to prevent costly failures, accelerate delivery and provide meaningful release evidence, rather than maximising test volume.
Useful measures connect testing activity to quality and delivery outcomes. Depending on the service, these may include requirements and risk coverage, escaped defects, defect severity and ageing, test pass trends, regression duration, automation reliability, environment availability, time to detect and resolve issues, and production incident patterns.
No single metric proves quality. CACI combines quantitative measures with evidence about critical user journeys, unresolved risks and acceptance criteria so stakeholders can understand what has been tested, what remains uncertain and whether the software is ready for its intended use.