> ## Documentation Index
> Fetch the complete documentation index at: https://docs.twill.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# Pricing & Credits

> How Twill's credit system works, plan tiers, and what you pay for.

## Plans

|                         | Free                         | Pro                          | Max                          |
| ----------------------- | ---------------------------- | ---------------------------- | ---------------------------- |
| **Price**               | \$0/mo                       | \$50/mo                      | \$200/mo                     |
| **Credits included**    | 10                           | 50                           | 200                          |
| **Users**               | Unlimited                    | Unlimited                    | Unlimited                    |
| **Agents**              | Claude Code, Codex, OpenCode | Claude Code, Codex, OpenCode | Claude Code, Codex, OpenCode |
| **Bring your own keys** | -                            | -                            | Yes                          |
| **Larger machines**     | -                            | -                            | Yes                          |

<Tip>
  Twill is **free for open-source projects**. Reach out to the team to get set
  up.
</Tip>

## How credits work

1 credit = \$1 of AI compute at cost. Credits cover the tokens your coding agents consume while working on tasks.

* **Free tier**: hard cap at your included credits. Once you hit the limit, tasks cannot be created until the next billing period.
* **Pro and Max tiers**: you can optionally set an overage limit in **Settings > Billing**. If no limit is set, there is no hard cap and you are billed for usage beyond your included credits.
* **BYOK (Max tier)**: when you bring your own API keys, you pay the AI provider directly. BYOK usage is tracked in Twill for visibility but is not billed through Twill.

## What counts as usage

Credits are consumed by the AI tokens used during task execution -- planning, implementation, verification, and CI auto-fix steps. Sandbox compute (the container your code runs in) is included and does not consume credits separately.

## Billing period

Credits reset monthly on the anniversary of your subscription start date. Unused credits do not roll over.

## Overages

On Pro and Max tiers, you can configure an overage limit from **Settings > Billing**. This sets a maximum dollar amount of additional spend beyond your included credits. If you prefer no cap, leave the overage limit unset.

## Open source

Open-source projects can use Twill for free. Contact the team via the website or Slack to apply.