Your background coding agent
Cloudmaxx
your coding.
Nothing runs on your laptop. Hand off a feature or a bug fix and go live your life. You're notified when it's done: watch the QA video, review the code, click merge.
Start buildingFree to try. Then $10 a month, flat.
Open-weight models from
- Moonshot AI
- Z.ai
- DeepSeek
- MiniMax
- Meta
Frontier models from
- Anthropic
- OpenAI
- xAI
- Alibaba
An example task
Sent at 9:27.
Ready to merge at 9:41.
It wrote the change, ran your checks and tested sign-in in a browser. You just review it.
Add a login page with Google sign-in. Keep the existing email login working.
BuildfulWorking…14 minWorking on it…
Added a login page with a Google button and wired the OAuth callback. Email login still works.
- ✓Read 142 files in tidepool/web
- ✓Planned the change
- ✓Wired up the OAuth callback
- ✓Built the sign-in page
- ✓Checks passed: lint, types, tests
- ✓Tested sign-in in a real browserrecordingrecorded
Why hand it off
Hand it off.
Get on with your day.
Buildful works in the cloud, on your repo, while you do something else.
Close the tab.
Buildful keeps working after you leave, for up to 2 hours on a task. Come back when it's done.
Run a list at once.
Every task gets its own private sandbox, so they run side by side.
Comes back tested.
Your checks run and failures get fixed. UI changes are tested in a real browser and recorded.
What it costs
A tenth of
the price.
Open-weight models cost a fraction of frontier models per token. Buildful turns that into one flat price, so you never count tokens.
Price per million output tokens
Coding models, list prices
Open-weight
- GLM 5.3 Flash$0.50
- DeepSeek V4.1 Flash$1.20
- GLM 5.3$4.40
Frontier
- GPT-6.1 Sol$10
- Claude Sonnet 5.5$10
- Claude Opus 5.5$20
- GPT-6 Astra$50
List prices in US dollars. Not every open-weight model is cheap: Kimi K3 is $15. Small frontier models such as Claude Haiku 5.5 are $0.50.
What coding plans cost a month
One price, no token math
- Buildful ProFlat price, no tokens to count$10
- GitHub Copilot Pro$10
- Claude Pro$20
- ChatGPT Plus$20
- Cursor Pro$20
- Claude Maxfrom $100
- Factory Max$200
Other plans at their US prices, from each plan's pricing page on October 5, 2026. Each plan includes different things, so compare what you get back, not only the price.
Who it's for
Developers with
a backlog.
You have a repo and a list of fixes, and you'd rather not sit watching an agent type.
- You hit your AI limit by lunch.
- Claude Code needs a paid Claude plan, and Max starts at $100 a month with usage limits. Buildful is $10 a month for 1,000 tasks.
- You like open-weight models, not running them.
- You've tried them on your laptop or with your own keys. Here they run in the cloud, already set up.
- Your backlog is longer than your day.
- Hand over the bug fixes and dependency upgrades in one go, and review them when you're ready.
- You'd rather review than babysit.
- No terminal to watch. You get a pull request with its checks passed and a browser recording.
How it works
Give it a task.
Come back to a
pull request.
Connect GitHub
Install the Buildful GitHub app and pick the repos it can work on.
Give it a task
A feature or a bug fix, in plain words. Then close the tab.
It builds and tests
In a private cloud sandbox. Your checks run, and UI changes are tested in a real browser.
You review and merge
Watch the recording, read the change, merge.
When you come back
What's waiting
for you.
Add CSV export to the orders page
tidepool/web · #218 · 6 files · +184 −12
SUMMARY
Adds an Export CSV button to the orders page. It downloads the orders that match the current filters, with tests for the file format.
- Lint and types
- Tests, after one fix
- Browser test: the file downloads
Review it, then merge. Nothing reaches your main branch without you.
Models
Smart Mode picks.
Or you do.
Every task in your plan runs on Smart Mode. On Pro and Team you can also pick any model below, paid from prepaid credit.
Included in your plan
Smart Mode
Buildful picks an open-weight model for every task. $10 a month, flat, with no tokens to count.
- ✓ Every plan, Free included
- ✓ Checks and browser test
- ✓ No API key needed
Pick it yourself · prepaid credit
Open-weight
- Moonshot AIKimi K3
- Z.aiGLM 5.3, GLM 5.3 Flash
- DeepSeekDeepSeek V4.1 Flash
- MiniMaxMiniMax M3.1 Flash
- MetaMuse Spark Open
Pick it yourself · prepaid credit
Frontier
- AnthropicClaude Fable 5.1, Claude Opus 5.5, Claude Sonnet 5.5, Claude Haiku 5.5
- OpenAIGPT-6.1 Sol, GPT-6 Astra, GPT-6 Luna
- GoogleGemini Argon, Gemini 3.8 Flash
- xAIGrok 4.7
- MetaMuse Wonder 1.0
- AlibabaQwen 3.8 Max
Frequently asked
questions
What is a background coding agent?
A background coding agent works on your code while you do something else. You give Buildful a task, it builds and tests the change in a cloud sandbox, and a pull request appears on your GitHub repo when it's done.
Do I need to keep the tab open?
No. The task runs on our servers, not in your browser, so you can close the tab or shut your laptop. It keeps going for up to 2 hours, and the pull request is waiting on GitHub and in Buildful when it's done.
How many tasks can run at once?
There's no fixed limit. Each task gets its own sandbox, so tasks don't wait for each other, and each one counts as one task on your plan.
How is Buildful different from Codex cloud, Jules or Copilot's coding agent?
They also work in the background and open pull requests. With Buildful, every task runs your repo's checks, UI changes are tested in a real browser and recorded, and the tasks in your plan run on open-weight models, which is how Pro costs $10 a month for 1,000 tasks. See Buildful side by side with Codex and Copilot.
Which models does it use?
Smart Mode picks an open-weight model for you and doesn't name it, and every task in your plan runs on it. On Pro and Team you can pick one yourself, such as Kimi K3, GLM 5.3 or DeepSeek V4.1 Flash, or a frontier model like Claude or GPT, paid from prepaid credit.
How much does it cost?
Your first 3 tasks are free, with no card. Pro is $10 a month for 1,000 tasks. Team is $40 a month for 3,000 tasks shared by unlimited teammates.
