Functionize Studio is an AI testing agent that builds, runs and maintains web UI tests. Free plan available; paid plans start at $20/mo.
Researched and fact-checked by Bartu Cavusoglu · Updated October 26, 2026
Functionize is a software testing platform whose current product, Studio, works as an independent testing agent for full web UI workflows. The company describes it as the quality layer for AI-written code. As coding agents ship changes faster than people can check them, Studio is meant to be a second agent that answers to the user rather than to the code.
The division of work is simple. The user sets what good looks like and makes the release call, and Studio does the testing in between. Functionize says Studio builds tests from instructions, runs them against the live application and keeps them passing as the application changes.
Users tell Studio what to verify, and it creates and runs the tests. The company says each run trains Studio on that specific application, so coverage sharpens with use. Developers who work with a coding agent can also drive verification in Studio through Functionize MCP.
Under the hood, Functionize says it uses its own models, data layer and execution engine instead of a general model wrapped in a testing prompt. Its architecture pairs generative agents that interpret intent with a machine learning core that verifies what the application does. The site states that each element is resolved from more than 200 data points and that execution runs on small models built for the work.
Studio covers test creation, execution and maintenance for web UI workflows. The plan comparison lists all agentic capabilities on every plan, plus SMS testing for MFA and one-time passwords, email testing for MFA and activation links, API and MCP access, and an API Explorer. Teams can save repeated flows such as a login as Components and reuse them, or run one data-driven test in place of many similar tests.
Team and security features scale with the plan. Growth adds SSO, role-based access control and a shared credit pool. Enterprise adds multi-team management, audit logs and usage analytics. Usage is visible in the Studio sidebar and in Reports, so teams can see how many credits each kind of task consumes.
Functionize is a testing platform whose product, Studio, is an independent AI agent that builds, runs and maintains tests for full web UI workflows. It is positioned as a quality layer for code written by AI agents.
Functionize offers a Free plan at $0, Growth at $20/mo, Scale at $100/mo and a custom-priced Enterprise plan. Plans are credit-based, and Growth and Scale can buy 200,000 extra credits for $10.
Yes. The Free plan has no time limit, includes all agent capabilities and 5 parallel runs, and needs no credit card according to the site. The pricing table lists 800,000 credits per month, while one FAQ answer says 400,000.
A credit measures agent work, and every agent task draws from the same balance. Editing tests, reading reports, connecting integrations, exporting results and changing settings use no credits.
Agent work stops until you buy more credits or the billing period restarts. Other functions keep working and your data stays in your account.
It suits QA engineers, developers using coding agents and engineering leaders who want automated UI testing from plain instructions. The company also points to healthcare, insurance, financial services, SaaS and enterprise teams.
The sources name Functionize MCP, which lets a coding agent drive Studio, plus API access. The site also lists contextual knowledge of Salesforce, ServiceNow, Workday and SAP applications.
The company lists SOC 2 Type II, isolated execution, encrypted tunnels, SSO and role-based access control, and a full audit trail. It also says enterprises can deploy in the Functionize cloud or inside their own environment.