PortBayvsAntigravity
This one is less either/or than the name suggests: Antigravity is one of the four agents PortBay dispatches. Google Antigravity is an agent-first development platform — a desktop app whose Manager View orchestrates parallel agents across workspaces, plus the agy CLI, with Gemini, Claude and GPT-OSS models behind it. PortBay is a native macOS app where agents are dispatched from Kanban cards into a real local environment: managed PHP and Node, a per-project database, trusted HTTPS on a .test domain, a public tunnel. You can use Antigravity inside PortBay — or compare what each manages for you.
Which one is right for you
You want the full stack, open source.
You want your tasks on a board — cards with comments, assignment and an audit trail — and the environment handled locally: a real database, HTTPS on a real domain, email capture, a shareable tunnel, nothing leaving your Mac. You want to keep using whichever agent wins this month — Claude Code, Codex, Cursor or Antigravity itself — dispatched from the same card.
It already fits your workflow.
You want Google's frontier models orchestrated natively — Gemini 3.x by default, Claude and GPT-OSS selectable per agent — with artifacts like implementation plans, walkthroughs and browser recordings, a browser subagent that verifies work in Chrome, and cloud sandboxes plus Google Cloud database connections. You're inside the Google ecosystem and the preview's rate limits don't block you.
Feature by feature
Every row sourced from the live product page. We mark partial support honestly — including where the other side wins.
Using Antigravity already? Bring it.
This is the one comparison where you don't have to choose. PortBay detects an installed Antigravity CLI and dispatches it from a card like any other agent — so your Gemini-powered agent gets what Antigravity alone doesn't set up locally: a managed runtime, a per-project database, trusted HTTPS on a real .test domain and a tunnel to share the result. Keep Antigravity's editor and Manager View for what they're good at; give the agent a board and a running app when the task is a card.
- Install PortBay and add your project folder — Antigravity is detected if its CLI is installed.
- Press play — PortBay provisions the runtime, database and HTTPS for that project.
- Create a card, assign Antigravity (or @mention it in a comment), move it to Todo, and it works against the running app.
PortBay vs Antigravity, in plain terms
Can PortBay dispatch Google Antigravity?
Yes. Antigravity's agy CLI runs headless — and PortBay detects it alongside Claude Code, OpenAI Codex and Cursor. Assign a card to Antigravity and move it to Todo; the agent works inside your running local project, comments what it changed, and advances the card to Done.
What does PortBay do that Antigravity doesn't?
PortBay runs the local environment and the task board. Antigravity orchestrates agents and verifies work in a browser, but it doesn't provision local runtimes, a local database, trusted HTTPS on a real domain or tunnels — its execution sandboxes and database connections live in Google's cloud. PortBay provisions all of that on your Mac, and tracks the work as Kanban cards with comments and @mention dispatch.
What does Antigravity do that PortBay doesn't?
Antigravity is itself an agent platform: it brings the models (Gemini 3.x by default, with Claude and GPT-OSS selectable per agent), a Manager View for parallel agents across workspaces, rich artifacts like implementation plans and browser recordings, and a browser subagent that tests the result in Chrome. PortBay doesn't provide models or an editor — it dispatches the agent CLIs you already have and runs the environment around them.
Is Antigravity free?
It's free during the public preview with rate-limited usage, and Google's paid AI plans raise the limits. The limits have been a sore point — in 2026 users reported abrupt quota reductions and multi-day lockouts, and Google raised paid-tier limits twice in one week after the backlash. PortBay itself imposes no usage limits; your agents run on whatever plan or API key you already have.
Is Antigravity open source?
No. Antigravity is a closed-source fork of VS Code — the agent layer and Manager View are proprietary, and the platform is tied to your Google account. PortBay's desktop app is open source under AGPL-3.0 and everything — board, cards, comments, environment — stays on your Mac.
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