What if we told you that there’s an AI tester that’s onboardable, trainable, and taskable—it can easily integrate into your team, adapt to your processes, and perform software testing tasks just like an experienced human software tester?
It amplifies your team’s efficiency, freeing valuable time to focus on more complex testing scenarios and boosting overall product quality.
That’s CoTester™ for you.
It’s the world’s first AI software tester pre-trained on advanced software testing fundamentals and Software Development Life Cycle (SDLC), making it a domain-specific expert system.
Think of CoTester as ChatGPT, but it’s purpose-built for software testing. It can write test cases for your website and web app, help you debug on the go, and execute them on real browsers of your choice—all based on testing scenarios and user stories you provide, without requiring extensive retraining or process overhauls.
So, how does CoTester actually work? What key features make it stand out in the pool of AI software testing agents? Let’s discuss this tool in detail.
Key CoTester AI Testing Agent Features and Workings
1. Conversational flexibility
Unlike competitors whose AI testing tools are primarily syntax-driven—relying on predefined commands even when using natural language—CoTester uses true AI to understand user intent without rigid syntax constraints.
This allows it to comprehend tasks naturally and flexibly, delivering a more intuitive and seamless testing experience.
You can task it using plain language without a predefined script, making it intuitive and easy to use. By typing “Hi” in the chat interface, you can start a conversation with it.

2. High-quality context building
There are two ways to train CoTester on your organization-specific testing strategies:

a. File uploads
Upload user stories in various formats (PDF, Word, CSV, PPT, etc.). CoTester uses this knowledge base to generate test cases. Therefore, the more detailed your user story, the more accurate the outcome will be.

The maximum file size for uploads is 15 MB per file.
b. URL pasting
For example, if you enter a URL like “https://public.testgrid.io/signup,” CoTester will automatically load the website in the background and prompt you to specify the type of test case required.

The site’s content is used to understand the context and meet your requirements accordingly. This feature is beneficial for directly testing web forms or other specific web pages.
3. Easy knowledge base management
CoTester also maintains a single repository for all your files and assets, simplifying information organization and retrieval. You can remove or add files on your CoTester interface using the Document icon and the “+Add More” button. Preserve the accuracy of your test cases without overwriting existing data.
4. Sequential test case workflow
On prompting, CoTester will not only give you a thorough description of the test case but also provide a step-by-step editor that demonstrates the automation workflow.

This is to help you understand the sequence of automated interactions with elements like web forms. CoTester also uses placeholder data like “John Doe” to fill in missing inputs.
5. Test execution and debugging
You can use the Debug button located in the top right corner to quickly execute the AI-generated test case. This allows you to verify if the test case flow aligns with your requirements and make adjustments, such as adding or removing steps, as needed.
You can also view execution logs, screenshots, and step-by-step results to quickly identify failures and resolve issues.

While the current reporting module already generates detailed reports, an upcoming release will integrate AI-powered summaries. This enhancement will provide quick insights into test executions, enabling you to grasp key results without reviewing the entire report.
6. Dynamic test case editing
Once the CoTester generates a test case, you can modify it manually by adding or removing steps as needed. This step saves hours, and you only invest time and effort in refining it.
Additionally, CoTester provides a chat interface that allows you to instruct it to tweak test cases. The clearer and more precise your instructions, the more accurate the modifications will be. Regardless of what you choose to do, CoTester turns testing into an efficient activity.
7. Automation for web apps and websites
CoTester is ideal for web applications, Salesforce workflows, and login authentication processes. It efficiently tests access controls and authentication flows, ensuring robust security.
CoTester’s reach will soon extend to mobile applications, as support for mobile testing is currently under development.
8. Security and privacy
CoTester ensures that all data uploaded for training remains secure and isolated within your organization’s instance. Nothing is shared between deployments, ensuring your proprietary information remains confidential.
Simply put, we don’t use your data to train our CoTester tool; whatever you upload or share on our platform always remains in your control. That’s our guarantee.
Who Can Benefit from CoTester by TestGrid?
Quality Assurance (QA) engineers, beginner automation testers, and agile teams will find CoTester helpful.
This AI software testing agent can participate in sprints, take notes, provide summaries with actionable items, and so on. Using it is like having an extra brain on your team, one that’s highly knowledgeable and infinitely adaptable.
Upcoming Integrations in CoTester, Our AI Testing Agent
Soon, you can connect CoTester to your Jira workspace to automatically fetch user stories, test cases, bugs, and other project details. This integration requires a valid API key to ensure secure access while maintaining data privacy.
Additional integrations are planned with platforms like Slack, Trello, ClickUp, Miro, Asana, GitHub, and Microsoft Teams, enabling even broader connectivity and collaboration.
Push the Boundaries of Software Development With CoTester by TestGrid
If you want to elevate your software testing efforts, there’s no better tool than CoTester by TestGrid. It incorporates feedback, ensuring each new task is completed efficiently and accurately.
Moreover, this AI software testing agent ensures 50% faster test case generation, 40% quicker test case execution, and a 60% reduction in testing costs. With CoTester™, you gain the ultimate partner to guarantee the best user experience quickly and without compromising on quality.
To dive deep into how this AI agent for testing works, request a free demo of CoTester™.