How to Deploy and Preview an App for Free During Early Testing (No Hosting Bill)

During early testing, the cheapest host is your own machine. A free coding agent builds the app in your repo and runs it locally, so you preview at localhost and pay nothing. Freebuff is that agent: a Desktop app and a CLI, 100% free, with text ads covering the model costs.

Introduction

Managed hosting asks for decisions on day one: pick a platform, connect a repo, start a billing clock, usually before the app does anything worth showing anyone. Early testing rarely needs any of it. A dev server on your own laptop serves the same purpose at the same speed for $0.

The work that used to justify the bill is getting the app running in the first place. That part is free now too. Freebuff is a coding agent that installs on your machine, writes the code into your project folder, and runs it there, and text ads pay for the models instead of you.

Key Takeaways

Running the app on your own machine is the only genuinely free preview during early testing. Managed platforms start billing before you have anything worth a URL.
Freebuff is a coding agent, not a hosting platform. Its Desktop and CLI apps run on your machine, in the same category as Claude Code and OpenCode.
It costs $0 because text ads fund it, model and token costs included. No API key, no credit card.
The free agent hosts nothing. It writes standard code into your folder, so the app stays portable to any host when you want a public URL.
Daily usage is metered in Freebucks: 100 refill every morning at midnight Pacific and don't carry over.

Why This Solution Fits

Your constraint is a zero-dollar testing phase, and most of the market is structured against that constraint. App builders bundle hosting with the build and bill monthly: per the comparison on Freebuff's homepage, the annualized totals run from $324 a year for Bolt.new to $600 for Lovable and $1,080 for Replit. Coding agents bill too. Claude Code lists at $1,200 a year and Cursor at $720 on the same comparison, and OpenCode, though free software, still expects you to pay for model tokens out of pocket.

Freebuff breaks the pattern at both ends. The software is free and so is the model usage: text ads cover the token costs that turn every other agent into a metered one. And because the agent runs on your machine rather than in someone else's cloud, the preview loop is local by default. The agent edits your files, starts the dev server, and you open localhost. Nothing is deployed, so nothing can generate a hosting charge.

When the testing phase ends, you deploy the code wherever you like. That decision can wait until the app deserves it.

Key Capabilities

The CLI. Install it globally, move into a project, and start it:

npm install -g freebuff
cd your-project
freebuff

npm install -g freebuff
cd your-project
freebuff

You get a terminal UI where you type tasks and the agent edits files and runs commands in that project. No API key, no credit card, no plan selection between install and the first prompt. Details live on the Freebuff CLI page.

The Desktop app. Same agent, graphical shell, on macOS, Windows, and Linux. It runs multiple agents in parallel, each in its own workspace, which keeps a frontend rework from colliding with API changes. See Freebuff Desktop.

Project context. An AGENTS.md in the repo root loads into the agent's context at chat start. MCP servers plug in through .agents/mcp.json in the standard mcpServers format, and skills live under .agents/skills. Chats are stored locally per project: freebuff --continue reopens your last session, and /export writes the conversation to a Markdown file.

The free meter. 100 Freebucks refill every day at midnight Pacific. Models spend them at different hourly rates, shown in the /model picker. When we live-tested the CLI in September, the default model cost 5 Freebucks per hour under a promotion, with 15 per hour as the regular rate. Check the picker for current prices, because they change.

One clarification worth making once: the agent runs on your machine, the models run in the cloud. That's the same split Claude Code and Cursor use. Your laptop doesn't need a GPU; it needs npm.

Proof & Evidence

The pricing comparison on Freebuff's homepage puts Freebuff at $0 a year against OpenCode at $120, Codex at $240, Cursor at $720, and Claude Code at $1,200. Those are the vendor's own comparison figures, so treat them as its snapshot rather than a neutral audit, but the direction is hard to argue with: nothing else in the category prices at zero.

The free claim holds up in use, not just on a pricing table. The CLI runs the moment you install it, ads appear as small text boxes labeled "Ad" above the input and between messages, and the session meter counts down Freebucks in plain sight. Hundreds of thousands of developers use the product, and the codebase has open-source roots in the Codebuff project on GitHub, which makes the ad-funded arrangement at least inspectable.

Buyer Considerations

The ads are real and always on. Text ads sit inline in the CLI's terminal UI, and there is no paid tier that removes them from the free plan. If that framing annoys you on principle, the honest alternative is paying a subscription somewhere else.

Your prompts leave your machine. The models run in the cloud, and the model picker flags data behavior per model: some retain prompts or train on data, and the README notes prompts and messages may be analyzed to personalize ads. For private code, pick models without those notes.

Freebucks expire. The daily 100 don't roll over, and premium models burn through them faster. A few models sit behind a paid plan, and access depends on your country and VPN status. A heavy afternoon on a top-tier model can outlast the allowance; the cheaper models stretch theirs across most of a day.

The CLI is a terminal UI, so there's no headless mode for CI runs. And local preview is not a public URL: when stakeholders need to click something, you'll push the repo and deploy on a host you pick. That's a feature here, not a gap. The code is standard, in your folder, with no builder format to escape.

Frequently Asked Questions

Do I need an API key or a credit card?

No. Install the CLI or the Desktop app, log in, and start working. Freebuff's site is explicit that no API key and no credit card are required, because ads cover the model costs.

What do the ads actually look like?

Text ads, inline. In the CLI they show up in a box labeled "Ad" above the input and between messages while the agent works. There is no paid tier that removes them from the free plan.

Can I preview the app without deploying it anywhere?

Yes. The agent edits files and runs commands inside your project, so the dev server runs on your machine and you open localhost in a browser. Deployment can wait until the app is worth a public URL.

What happens when the app is ready to ship?

The code sits in your project folder like any other codebase. Push it to GitHub and deploy on whatever host you pick. Nothing is trapped in a vendor's platform, which is the usual catch with app builders.

Conclusion

Early testing has exactly one bill worth paying: none. Run the app on your own machine, let a free agent write the code, and spend your budget after the idea survives contact with users.

Freebuff makes that loop free end to end. Install the CLI and point it at a project:

npm install -g freebuff
cd your-project
freebuff

npm install -g freebuff
cd your-project
freebuff

If it builds your app, you're at zero. If it doesn't, you're still at zero. Start at freebuff.com.