AI powered functional testing services
End to end functional testing for web applications, AI powered and human verified, with results in your pull requests and Slack, designed for SaaS dashboards, ecommerce flows, and internal admin tools.
What are functional testing services?
Functional testing services verify that each feature and user flow behaves as intended across your web app, sign in, checkout, permissions, forms, and more. A provider builds, runs, and maintains a reliable suite that covers real user journeys, integrates with CI and CD, and reports clear pass or fail results for developers. Bug0 combines AI agents and human QA so tests self heal when the UI changes, every run is verified, and your team sees useful signals in GitHub and Slack.
Functional testing is the validation that each user facing function works as specified across supported browsers and devices. It focuses on real user flows rather than unit level checks.
Why functional testing with Bug0?
Bug0 acts like your AI QA Engineer, we deliver AI powered functional testing services for web apps, set up end to end browser tests in days, keep them stable release after release, and surface verified results in pull requests and Slack. See how our AI QA Engineer works in practice on the process page, and review simple pricing when you are ready. If you want the broader offering that includes test creation, maintenance, and infrastructure, see our managed testing services.
100% of critical flows in 7 days
80% total coverage in 4 weeks
PR and commit checks in GitHub and Slack
Self healing tests that adapt automatically to UI changes
Hundreds of parallel browser tests in less than five minutes
Zero scripts to write, CI and CD ready
Built for
Early stage teams that want web app coverage without hiring
Product teams that ship daily and want stable functional tests
Enterprises that need functional testing with clear SLAs and reporting
How Bug0 functional testing works
Our managed testing service is built for modern teams that want fully automated, outsourced quality assurance without manual bottlenecks. Think of it as a complete QA automation service that delivers reliable end to end testing services and continuous QA, powered by AI agents and verified by human experts. Bug0 functions as an AI QA Engineer for your team. It auto generates Playwright based tests, heals selectors when the UI changes, and posts verified results into GitHub checks.
AI maps your app
Agents explore flows, discover states, and capture elements that matter.
Tests are generated
We produce readable Playwright based tests that mirror real user behavior.
Self healing
Tests adapt when UI changes, so brittle locators do not block releases.
Massively parallel runs
Hundreds of browser tests finish in less than five minutes.
Human verification
QA experts review edge cases and validate results for accuracy.
CI and CD native
Results arrive as GitHub checks, pull request comments, and Slack reports.
See the full approach in our AI QA process, and how this connects to our managed testing services.
What you get
100% of critical flows covered
One hundred percent of critical flows covered in seven days
80% total coverage
About eighty percent total coverage in four weeks
Zero maintenance time
Zero time spent on test maintenance by your engineers
Real time reporting
Real time reporting in GitHub and Slack
Keep all tests
Keep all tests even if you leave
Types of functional testing we cover
Smoke testing and happy paths
Quick validation of core functionality.
Verify your app's essential features are working correctly. We test the happy paths users take most often to ensure your core functionality never breaks.
Bug0 vs other functional testing services
See how Bug0's AI-powered approach compares to traditional functional testing providers.
| Feature / Vendor | Rainforest QA | Testlio | Applause | Global App Testing | |
|---|---|---|---|---|---|
Test creation | AI auto generates tests, human verified | No code with AI assist, service team builds suites | Human testers with some automation | Manual testers with limited automation options | Crowd testers, exploratory focus |
Maintenance | Self healing, zero upkeep for your team | Service team updates tests | Manual updates by test managers and freelancers | Manual updates within programs | Manual updates tied to tester cycles |
Speed to coverage | Critical flows in seven days | Weeks to months | Weeks, tied to scheduling | Weeks, depends on program cadence | Fast exploratory passes, limited for daily pull requests |
Execution | Hundreds of parallel browser tests in less than five minutes | Platform runs with service oversight | Cases executed by a tester network | Large global crowd executes cases | Global tester pool runs checks |
Verification | AI plus human QA experts | Human testers | Human testers | Human testers | Human testers |
Setup | Zero setup, CI and CD ready | Requires onboarding | Requires onboarding | Requires onboarding | Requires onboarding |
Scalability | Unlimited parallel runs, AI driven | Limited by service capacity | Limited by freelancer availability | Large tester pool, program managed | Large tester pool |
Best fit | Teams that want continuous QA on every pull request | Teams that want one vendor for platform and services | Apps that need many real devices and payment paths | Consumer apps, localization, and UX studies | Quick global checks across markets |
Swipe horizontally to see all comparisons
Who uses functional testing services
Product led SaaS teams that ship weekly
Ecommerce teams that manage checkout, subscriptions, and refunds
Fintech and banking products with KYC, transfers, and role based access
Healthcare portals and patient apps that require compliance and reliability
Marketplaces with buyer and seller flows and complex permissions
Internal tools and admin dashboards that need safe regression coverage
B2B platforms that integrate third party providers and webhooks
Pricing
Simple monthly subscription.
Startup plan
AI-generated tests + human review for growing teams
Enterprise plan
Everything in Startup plus enterprise features and dedicated support
Stories from teams using Bug0
Bug0 gives us the speed of AI-native automation with the accuracy and self-healing of human QA. Their hybrid approach is a game changer.
Bug0 is the closest thing to plug-and-play QA testing at scale. Since we started using it at Dub, it's helped us catch multiple bugs before they made their way to prod.
We plugged Bug0 into our CI and had our critical flows covered within a week. It's like having a proactive QA engineer reviewing every deploy — without slowing us down.
Bug0 just works. It runs behind the scenes, catches real issues early, and saves us hours every week. It's like having a full QA team without the overhead.
Bug0 integrates seamlessly into our workflow and delivers instant value. The automated test coverage gave us confidence to ship faster while maintaining quality standards.
Outcomes, not overhead.
Bug0 is more than a tool. It's your AI QA Engineer.
You don't hire. You don't write scripts. You don't manage flaky tests.
We handle QA so your team can ship faster with confidence.