> ## Documentation Index > Fetch the complete documentation index at: https://docs.webapp.io/llms.txt > Use this file to discover all available pages before exploring further. # Documentation > Explore our guides and examples to integrate webapp.io ## What is webapp.io? Webapp.io is a hyper-optimized DevOps platform for webapps. We build testing VMs in *seconds* every time you push code to GitHub, GitLab, or BitBucket. * Our VMs automatically hibernate when they aren't being used * We let you duplicate VMs to make copies of your stack and run acceptance tests in parallel * We take [snapshots](/snapshots) of the VM as it builds, so that future builds can entirely skip `docker pull` or `npm install` ### What happens when I sign up? 1. You'll install webapp.io onto a GitHub, GitLab or BitBucket repository 2. Our onboarding will guide you to build a [Layerfile](../layerfile-reference/intro) which defines your VM build 3. You commit your Layerfile, and we'll automatically build it into a VM every time you push a commit. ### What can serverless VMs be used for? Our users primarily use serverless VMs for three things: 1. Preview environments - by making a Layerfile with the [EXPOSE WEBSITE](../layerfile-reference/expose-website) directive, you immediately get an environment deployed for every pull request. 2. Acceptance tests - by making a Layerfile with [SPLIT 5](../layerfile-reference/split), you can build your stack and fork it five times to run tests in parallel. 3. Hosting - by using [webapp.io hosting](../hosting/introduction), you can make ephemeral environments stick around and not shut off. At webapp.io, we're building a *serverless VM platform*. You can even create multiple Layerfiles and combine them into powerful DevOps workflows to help your team ship 10x faster. ## Limits ### General Limits The following general limits are applied to all Webapp.io accounts to prevent abuse. | - | Starter | Pro | Team | Scale | | ------------------------------------------ | --------------- | ------------------- | --------------------- | -------------------------------------- | | Number of members | 3 | 10 | 50 | Unlimited | | **CI/CD Features** | | | | | | Concurrency | None | 6 parallel VMs | 12 parallel VMs | Custom based on server size | | Debugging terminal access | ✔ | ✔ | ✔ | ✔ | | BUTTON feature | | ✔ | ✔ | ✔ | | INHERITANCE feature | | ✔ | ✔ | ✔ | | SPLIT feature | | ✔ | ✔ | ✔ | | GitHub, GitLab, BitBucket Integrations | ✔ | ✔ | ✔ | ✔ | | Cypress, Reflect.run, Doppler Integrations | ✔ | ✔ | ✔ | ✔ | | API & Webhooks | ✔ | ✔ | ✔ | ✔ | | Layerfile Analytics | | | ✔ | ✔ | | Custom performance reports | | | | ✔ | | Custom integration requests | | | | ✔ | | **Production-like preview environments** | | | | | | Access to free domain cidemo.co | ✔ | ✔ | ✔ | ✔ | | Secure preview environments | ✔ | ✔ | ✔ | ✔ | | Retry feature | ✔ | ✔ | ✔ | ✔ | | Version history guarantee | None | 15 days for 10 URLs | 30 days for 50 URLs | Custom | | Bandwidth | 10GB | 100GB | 1TB | Custom | | Number of private previewers | 3 | 10 | 50 | Custom | | **Full stack hosting** | | | | | | Host your full stack MVPs | ✔ | ✔ | ✔ | ✔ | | Domains per organization | 1 | 5 | 10 | Unlimited | | **Server access** | | | | | | VM access | 2 VMs | 7 VMs | 12 VMs | Custom based on private server | | Server type | Shared | Shared | Shared | Private | | **Support, Security & Compliance** | | | | | | Technical support levels | Community Forum | Email | Email & Slack Connect | Email, Slack Connect & Video with SLAs | | Custom roles and permissions | | | ✔ | ✔ | | SOC2 and HIPAA support | | | ✔ | ✔ | | Security reviews | | | | ✔ | | Pay by invoice | | | | ✔ | If your project is likely to exceed these limits, please [contact sales](https://webapp.io/contact/sales) to discuss solutions.