Kool vs Tilt

Kool.dev Cloud is a platform-as-a-service for deploying containerized web applications, either on managed hosting or infrastructure a team provides. Deployments can start with a Git push, trigger automatic builds, create preview environments for pull requests, and avoid downtime. Kool supports Docker Compose compatibility and existing Compose setups. For bring-your-own-cloud deployments, it installs Kubernetes using k0s on a VPS with SSH access; named providers include DigitalOcean, Hetzner, AWS, Vultr, OVH, and Linode, and Kool says any VPS with SSH can be used. Managed database options include MySQL, PostgreSQL, Redis, MongoDB, and Elasticsearch. Monitoring includes Prometheus and one-click Grafana dashboards. Listed security features include automated hardening, network isolation, secrets management, SSH key authentication, cluster activity logs, and credentials encrypted at rest. Plans include BYOC Free, managed cloud plans from $5.00 per month, and BYOC Pro at $49.00 per month. The BYOC Free tier is limited to one cluster, one node, one environment, and one app; a valid credit card is required after seven days. Kool lists documentation, community Discord, and email support for all plans, with priority support for Pro and Team.

Tilt is a free, open-source development environment for teams building microservice applications that deploy to Kubernetes. It watches files, builds container images and updates the development environment when code changes. Its live_update feature deploys changes to running containers in seconds, including compiled-language code or dependency changes. Tilt can start the application and automate rebuilds, with logs, broken builds and runtime errors in its feedback loop. Its UI collects service logs and shows the development environment's state.

Teams configure services and workflows with Tiltfiles using Kubernetes YAML and Docker images; documentation also describes integrating Bazel builds. Tilt has an extension system for sharing Tiltfile functionality, such as team scripts and custom buttons, and provides editor support for VS Code, selected JetBrains IDEs and other editors through an embedded language server. It runs on macOS, Linux and Windows. The standard setup requires Docker, kubectl and a local Kubernetes cluster, though workflows can also use options such as Helm, Podman or local processes. Tilt is maintained as open source by Docker, Inc. under the Apache-2.0 license and costs nothing.