frum vs PortBay

frum is a free Ruby version manager written in Rust. It can install and uninstall Ruby versions, list available or installed versions, and select a global or local version. It also works with .ruby-version files, so projects can specify which Ruby version frum should use. The project describes its implementation as pure Rust and says it does not use ruby-build. Installation methods listed include Homebrew or Linuxbrew, Arch Linux packages, Cargo, and release binaries. The README provides setup instructions for Bash, Zsh, and Fish and lists shell auto-completion. Ruby installation accepts configuration options such as an OpenSSL directory and jemalloc allocator selection. The README reports a benchmark in which evaluating frum init ran about six times faster than evaluating rbenv init. The project is MIT licensed and welcomes contributions, issues, and pull requests. Linux and macOS are listed as supported platforms; Windows is mentioned in the project’s goals. Its latest listed release is v0.1.2.

PortBay is a local development environment for running apps on a Mac and dispatching AI coding agents from a task board. Cards can be assigned to Claude Code, Codex, Cursor, or Antigravity; each card can have its own Git worktree so multiple agents can work on one repository at once. PortBay provides local project runtimes, trusted HTTPS on.test domains, per-project MySQL and PostgreSQL databases, and Mailpit email capture. Community includes public Cloudflare and SSH tunnels. Pro adds persistent SSH options including keep-alive, auto-reconnect, reverse tunnels, SOCKS proxy, and multi-hop. PortBay says source code is not uploaded and project files, task cards, the board, and agent comments stay on the machine. Agent sandboxing is on by default and denies access to credential stores and.env files outside the assigned project. The free Community plan supports up to six projects, two sandboxed runs, and one Mac. Pro is $10 a month for the first 100 licences while the subscription remains active, then $24 a month; it includes a 7-day trial. PortBay supports macOS and Linux; Windows is on the roadmap.