Shift-Left API vs. Virtuoso QA Comparison Chart

QA teams, developers, and enterprises seeking AI-powered test automation to improve software quality, reduce maintenance effort, and accelerate release cycles

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Touchstone is the agentic layer of Virtuoso QA, generally available since 30 September 2026. It uses specialised AI agents to build, run, diagnose and repair automated tests for browser-based applications, including enterprise systems and custom web applications. When a test fails, the agents classify the failure and propose a repair. When the application or a requirement changes, they identify the affected tests and propose updates. Agents propose and humans approve: no change is published without human review, existing tests are never updated silently, and every change is versioned and reversible. AI is used for authoring and analysis, while execution runs on Virtuoso’s deterministic engine. Budgets, usage limits, audit logging and access controls are built in, supporting governed AI adoption in regulated industries.

Virtuoso QA is an AI-native testing platform. Its agentic layer, Touchstone, uses AI agents to build, run, diagnose and repair tests for browser-based applications and enterprise systems. When a test fails, Touchstone classifies the failure and proposes a repair. When the application changes, it identifies the affected tests and proposes updates. AI is used for authoring and analysis, while execution runs on a deterministic engine, so the same test produces the same result each time. Every change requires human approval before publication, existing tests are never updated silently, and all changes are versioned and reversible. Budgets, usage limits, audit logging and access controls are built in, which supports controlled adoption of AI in testing, particularly in regulated industries.

Virtuoso QA tests APIs and user interfaces within the same test, so a single journey can cover a complete business transaction. API requests are configured with headers, body, query parameters, authentication and input and output mapping, and Postman collections can be imported directly. API responses can be stored as variables and used in later UI or API steps. Touchstone, Virtuoso’s agentic layer, uses AI agents to run, diagnose and repair these tests. When a test fails, Touchstone classifies the failure and proposes a repair, and every change requires human approval before publication. Changes are versioned and reversible. Tests run on a deterministic execution engine on managed cloud infrastructure and integrate with CI/CD pipelines, so API checks run on every release alongside end-to-end regression.

Virtuoso QA is an AI-native platform for automated testing of browser-based applications, including enterprise systems such as Dynamics 365, Salesforce, ServiceNow, SAP Fiori and Workday, as well as custom web applications and ISV products. Touchstone, its agentic layer, uses AI agents to build, run, diagnose and repair automated tests. When a test fails, Touchstone classifies the failure and proposes a repair. When the application changes, it identifies the affected tests and proposes updates. Every change requires human approval before it is published, and is versioned and reversible. Tests run on a deterministic execution engine on managed cloud infrastructure, so results are consistent between runs and there is no grid to maintain. Execution integrates with CI/CD pipelines. Teams get test results together with an evidence of what was tested, what changed and who approved it.

Virtuoso QA is a codeless test automation platform. Teams do not write or maintain test code, frameworks or execution infrastructure. Touchstone, its agentic layer, uses AI agents to build, run, diagnose and repair tests. When a test fails, Touchstone classifies the failure and proposes a repair. When the application changes, it identifies the affected tests and proposes updates. The team’s role shifts from writing and fixing tests to reviewing and approving changes: every change requires human approval before publication and is versioned and reversible. For advanced cases, JavaScript extensions and API steps are available. Execution runs on a deterministic engine on managed cloud infrastructure, and the platform supports browser-based applications, including enterprise systems and custom web applications.

Virtuoso QA runs tests across Chrome, Edge, Firefox and Safari on Windows, macOS, Linux, iOS and Android, using managed cloud infrastructure with roughly 2,000 operating system, browser and device combinations. Teams can also connect their own grid. Device configurations are defined once and run in parallel, on a schedule or from CI/CD pipelines. Responsive and mobile web applications are supported on real and emulated devices. Touchstone, Virtuoso’s agentic layer, uses AI agents to diagnose and repair tests across these runs. When a test fails on a particular browser or device, Touchstone classifies the failure and proposes a repair, which a human approves before publication. Every change is versioned and reversible, and execution is deterministic, so results are consistent across runs.

As organisations automate more business processes across ERP, CRM, HR and service platforms, each process needs to be verified after every change. Virtuoso QA tests these processes end to end and across systems. Business Process Orchestration combines tests into multi-stage flows such as Quote-to-Cash, Procure-to-Pay or Hire-to-Retire, spanning Dynamics 365, Salesforce, ServiceNow, Workday and custom applications, with data passed between stages. Touchstone, Virtuoso’s agentic layer, uses AI agents to run, diagnose and repair these tests. When a process fails, Touchstone classifies the failure and proposes a repair, which a human approves before publication. Every change is versioned and reversible. Execution is deterministic and integrates with CI/CD pipelines, so verification keeps pace with automation.

Virtuoso QA gives quality teams one platform to build, run, diagnose and maintain automated tests across browser-based applications, from enterprise systems such as Dynamics 365, Salesforce and Guidewire to custom web applications. Touchstone, its agentic layer, uses AI agents to carry out this work. When a test fails, Touchstone classifies the failure and proposes a repair. When the application changes, it identifies the affected tests and proposes updates. QA teams review and approve every change before publication, and each change is versioned and reversible. Execution runs on a deterministic engine on managed cloud infrastructure. The result is a record of what was tested, what changed and who approved it, which QA leaders can share with engineering, risk and change management teams.

Virtuoso QA runs automated regression testing for browser-based applications, including enterprise systems such as Dynamics 365, Salesforce, ServiceNow and Workday, which receive regular vendor updates. Regression suites run in parallel on managed cloud infrastructure, on a schedule or from CI/CD pipelines. Touchstone, Virtuoso’s agentic layer, uses AI agents to diagnose and repair regression tests. When a test fails, Touchstone classifies the failure, separating application defects from test issues, and proposes a repair. When the application changes, it identifies the affected tests and proposes updates. Every change requires human approval before publication and is versioned and reversible. Execution is deterministic, so a failure reflects a real change in the application rather than variation between runs.

Virtuoso QA keeps tests running through application change without hiding real defects. At the element level, self-healing adapts tests when the user interface changes, and declines to heal when confidence is low, so the test fails rather than passing incorrectly. Teams can lock selectors on high-risk steps. Touchstone, Virtuoso’s agentic layer, extends repair beyond individual elements. Its AI agents classify each failure and propose repairs to the affected tests, and when the application changes, they identify which tests need updating. Repairs are proposed rather than applied automatically: every change requires human approval before publication, existing tests are never updated silently, and all changes are versioned and reversible. Execution is deterministic, so repaired tests behave consistently.

Virtuoso QA is an AI-native platform for functional, regression and end-to-end testing of browser-based applications, including enterprise systems such as Dynamics 365, Salesforce, ServiceNow, SAP Fiori, Workday and Guidewire, as well as custom web applications and ISV products. Touchstone, its agentic layer, uses AI agents to build, run, diagnose and repair tests. When a test fails, Touchstone classifies the failure and proposes a repair. When the application changes, it identifies the affected tests and proposes updates. Every change requires human approval before publication and is versioned and reversible. UI and API steps can be combined in a single test. Execution runs on a deterministic engine on managed cloud infrastructure, giving teams a record of what was tested, what changed and who approved it.

Virtuoso QA manages automated tests and the decisions made about them in one platform. Touchstone, its agentic layer, uses AI agents to build, run, diagnose and repair tests, and routes every proposed change through human review before it is published. Each change is versioned, comparable and reversible, and the Timeline records who changed what, when and why. Tests are linked to requirements, and when a requirement or the application changes, Touchstone flags the affected tests for review rather than updating them silently. Tests are organised into projects, goals and journeys, with reusable checkpoints, tags and scheduled plans. Analytics dashboards report pass rates, execution times and failure root causes. Integrations with Jira, Azure DevOps, GitHub and Slack keep results visible to engineering and QA teams.

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