Gatling vs Percy

Gatling is a load-testing and performance engineering platform for simulating traffic and finding performance bottlenecks. Tests can be written in code, generated with a no-code tool or imported from Postman. Scenarios support Java, JavaScript, TypeScript, Scala and Kotlin. The load engine supports HTTP out of the box and JMS, and can be extended for other protocols. The listing includes API and stress testing, distributed load and hybrid deployment; browser-based testing is marked unsupported. Gatling Studio is a native application that runs locally on macOS, Windows and Linux. Enterprise Edition adds a web interface for managing and monitoring tests, live dashboards, CI/CD integration, advanced permissions and hybrid or cloud deployment. Listed integrations include GitHub Actions, Jenkins, GitLab CI, Azure DevOps, Datadog, Dynatrace, New Relic, Slack and Microsoft Teams. Gatling says it is SOC 2 Type II certified and encrypts traffic in transit and stored data at rest. A free plan is available. Basic (annual) is €89 a year, billed annually; Enterprise has a free 14-day trial without a credit card.

Percy automates visual testing by capturing DOM snapshots and assets, rendering them across browsers, and comparing results with earlier snapshots to flag visual changes. Responsive checks use configurable widths, while snapshot stabilization freezes animations and other dynamic elements to reduce false positives. Percy groups snapshots into the same build when tests run in separate processes or on different machines. Its review workflow includes status updates, notifications, comments, comparisons, and automatic diff matching. Listed integrations include GitHub, GitLab, Slack, Storybook, WebdriverIO, and Jenkins. Documented frameworks include Selenium, Playwright, Cypress, Puppeteer, Ember, Appium, and others. Percy documentation describes testing across real devices and desktop and mobile browsers. The free plan includes 5,000 screenshots per month, unlimited users, and unlimited projects. Desktop costs $199 a month, billed annually, for 10,000 screenshots per month; Desktop & Mobile costs $599 a month, billed annually, for 25,000 screenshots per month. Paid plans have fixed screenshot allowances, and additional usage is charged at the overage rate. Enterprise pricing is custom and unlisted.