> ## Documentation Index
> Fetch the complete documentation index at: https://tbd-6fc993ce-hypeship-scraperly-link.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Pricing & Limits

export const PricingCalculator = () => {
  const defaults = {
    plan: 'free',
    browserType: 'headless',
    avgSessionLength: 30,
    numSessions: 100
  };
  const planPrices = {
    free: 0,
    hobbyist: 30,
    startup: 200
  };
  const usagePrices = 0.0000166667;
  const browserMultipliers = {
    headless: 1,
    headful: 8,
    gpu: 48
  };
  const [plan, setPlan] = useState(defaults.plan);
  const [browserType, setBrowserType] = useState(defaults.browserType);
  const [avgSessionLength, setAvgSessionLength] = useState(defaults.avgSessionLength);
  const [numSessions, setNumSessions] = useState(defaults.numSessions);
  const [flash, setFlash] = useState(false);
  const prevPriceRef = useRef(null);
  const hasInteracted = useRef(false);
  useEffect(() => {
    if (!hasInteracted.current) return;
    var url = new URL(window.location);
    url.searchParams.set('plan', plan);
    url.searchParams.set('browserType', browserType);
    url.searchParams.set('duration', avgSessionLength);
    url.searchParams.set('sessions', numSessions);
    url.hash = 'pricing-calculator';
    window.history.replaceState(null, '', url);
  }, [plan, browserType, avgSessionLength, numSessions]);
  const handleBrowserTypeChange = type => {
    hasInteracted.current = true;
    setBrowserType(type);
    if (type === 'gpu' && plan !== 'startup') {
      setPlan('startup');
    }
  };
  const handlePlanChange = newPlan => {
    hasInteracted.current = true;
    if (browserType === 'gpu' && newPlan !== 'startup') {
      return;
    }
    setPlan(newPlan);
  };
  var price = planPrices[plan];
  var multiplier = browserMultipliers[browserType];
  var usageCost = usagePrices * multiplier * numSessions * avgSessionLength;
  var includedUsageCredits = 5;
  if (plan === 'hobbyist') {
    includedUsageCredits = 10;
  } else if (plan === 'startup') {
    includedUsageCredits = 50;
  }
  if (usageCost > includedUsageCredits) {
    price += Math.max(0, usageCost - includedUsageCredits);
  }
  useEffect(() => {
    var prev = prevPriceRef.current;
    if (prev !== null && (prev.usageCost !== usageCost || prev.includedUsageCredits !== includedUsageCredits || prev.price !== price)) {
      setFlash(true);
      var t = setTimeout(() => setFlash(false), 300);
      return () => clearTimeout(t);
    }
    prevPriceRef.current = {
      usageCost,
      includedUsageCredits,
      price
    };
  }, [usageCost, includedUsageCredits, price]);
  const labelStyle = {
    fontWeight: 600,
    fontSize: '0.875rem',
    minWidth: '10rem',
    flexShrink: 0,
    maxWidth: '10rem'
  };
  const rowStyle = {
    display: 'flex',
    alignItems: 'center',
    gap: '0.5rem',
    minHeight: '2.25rem'
  };
  const inputStyle = {
    minWidth: 0,
    flex: 1,
    maxWidth: '100%',
    boxSizing: 'border-box',
    background: 'transparent'
  };
  const numberInputStyle = {
    borderBottom: '1px solid #81b300',
    textAlign: 'right'
  };
  const selectStyle = {
    ...inputStyle,
    appearance: 'none',
    backgroundImage: `url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='%23374151'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M19 9l-7 7-7-7'/%3E%3C/svg%3E")`,
    backgroundRepeat: 'no-repeat',
    backgroundPosition: 'right 0.5rem center',
    backgroundSize: '0.75rem',
    paddingRight: '1.5rem'
  };
  const btnStyle = active => ({
    padding: '0.25rem 0.5rem',
    borderRadius: '0.375rem',
    border: `1px solid ${active ? '#81b300' : 'var(--btn-border)'}`,
    fontSize: '0.875rem',
    background: active ? 'var(--btn-selected-bg)' : undefined
  });
  return <Columns cols={2}>
            <Card title="Controls" icon="calculator">
                <div style={rowStyle}>
                    <label style={labelStyle}>Plan</label>
                    <select style={selectStyle} value={plan} onChange={e => handlePlanChange(e.target.value)}>
                        <option value="free">Free</option>
                        <option value="hobbyist">Hobbyist</option>
                        <option value="startup">Startup</option>
                    </select>
                </div>
                <div style={rowStyle}>
                    <label style={labelStyle}>Session length (seconds)</label>
                    <input type="number" style={{
    ...inputStyle,
    ...numberInputStyle
  }} value={avgSessionLength} onChange={e => {
    hasInteracted.current = true;
    setAvgSessionLength(parseInt(e.target.value));
  }} />
                </div>
                <div style={rowStyle}>
                    <label style={labelStyle}>Number of sessions</label>
                    <input type="number" style={{
    ...inputStyle,
    ...numberInputStyle
  }} value={numSessions} onChange={e => {
    hasInteracted.current = true;
    setNumSessions(parseInt(e.target.value));
  }} />
                </div>
                <div style={rowStyle}>
                    <button class="btn btn-primary dark:text-white" style={btnStyle(browserType === 'headless')} onClick={() => handleBrowserTypeChange('headless')}>Headless</button>
                    <button class="btn btn-primary dark:text-white" style={btnStyle(browserType === 'headful')} onClick={() => handleBrowserTypeChange('headful')}>Headful</button>
                    <button class="btn btn-primary dark:text-white" style={btnStyle(browserType === 'gpu')} onClick={() => handleBrowserTypeChange('gpu')}>Headful + GPU</button>
                </div>
                <div style={rowStyle}>
                    <span style={{
    width: '100%',
    fontSize: '0.8rem',
    fontStyle: 'italic'
  }}>
                        ${(usagePrices * multiplier).toFixed(8)}/second
                        {browserType === 'gpu' && <span style={{
    marginLeft: '0.5rem',
    color: '#81b300'
  }}>(Startup tier required)</span>}
                    </span>
                </div>
            </Card>
            <Card title="Price" icon="circle-dollar">
                <div style={rowStyle}><span style={labelStyle}>Base plan:</span> <span style={{
    background: flash ? '#81b300' : 'transparent',
    transition: 'background 0.5s ease',
    marginLeft: 'auto'
  }}>${planPrices[plan].toFixed(2)}</span></div>
                <div style={rowStyle}><span style={labelStyle}>Usage:</span> <span style={{
    background: flash ? '#81b300' : 'transparent',
    transition: 'background 0.5s ease',
    marginLeft: 'auto'
  }}>+${usageCost.toFixed(2)}</span></div>
                <div style={rowStyle}><span style={labelStyle}>Free credits:</span> <span style={{
    background: flash ? '#81b300' : 'transparent',
    transition: 'background 0.5s ease',
    marginLeft: 'auto'
  }}>-${includedUsageCredits.toFixed(2)}</span></div>
                <div style={rowStyle}><span style={labelStyle}>Total cost:</span> <span style={{
    background: flash ? '#81b300' : 'transparent',
    transition: 'background 0.5s ease',
    marginLeft: 'auto'
  }}>${price.toFixed(2)}</span></div>
            </Card>
        </Columns>;
};

With Kernel, you only pay for what you use and nothing more. You don't pay for idle time thanks to [Standby Mode](/browsers/standby), idle browsers in a pool incur no disk charges, and you're never charged for proxies.

## Pricing

| Browser type               | Price (\$/sec) |
| -------------------------- | -------------- |
| Headless                   | 0.0000166667   |
| Headful                    | 0.0001333336   |
| Headful + GPU acceleration | 0.0008000016   |

> Note: GPU acceleration is only available on headful, on-demand browsers. Standby mode is not supported for GPU-accelerated browsers.

### Pricing calculator

<PricingCalculator />

## Managed infrastructure

| Feature                         | Developer (free + usage) | Hobbyist (\$30 / mo + usage) | Start-Up (\$200 / mo + usage) | Enterprise   |
| ------------------------------- | ------------------------ | ---------------------------- | ----------------------------- | ------------ |
| Included credits / mo           | \$5                      | \$10                         | \$50                          | Custom       |
| Extended browser timeouts       | ✅                        | ✅                            | ✅                             | ✅            |
| Browser live view               | ✅                        | ✅                            | ✅                             | ✅            |
| Configurable browser viewports  | ✅                        | ✅                            | ✅                             | ✅            |
| Managed stealth mode            | ✅                        | ✅                            | ✅                             | ✅            |
| Computer controls API           | ✅                        | ✅                            | ✅                             | ✅            |
| Browser replays                 | ❌                        | 7 days                       | 30 days                       | Custom       |
| Browser profiles                | ❌                        | ✅                            | ✅                             | ✅            |
| Managed auth profiles           | ❌                        | ✅                            | ✅                             | ✅            |
| File uploads & downloads        | ❌                        | ✅                            | ✅                             | ✅            |
| Configurable browser extensions | ❌                        | ❌                            | ✅                             | ✅            |
| Configurable & BYO proxies      | ❌                        | ❌                            | ✅                             | ✅            |
| Browser pools                   | ❌                        | ❌                            | ✅                             | ✅            |
| Support                         | Discord                  | Discord                      | Email                         | Shared Slack |
| SOC2 compliance                 | ✅                        | ✅                            | ✅                             | ✅            |
| GPU acceleration                | ❌                        | ❌                            | ✅                             | ✅            |
| HIPAA compliance (BAA)          | ❌                        | ❌                            | ❌                             | ✅            |

> Note: Included monthly credits apply to usage costs only.

## Reserved browsers (browser pools)

With Browser Pools, you pay the standard usage-based price per GB-second while browsers are running. Idle browsers in a pool incur no disk charges — you only pay when a browser is actively in use.

> Note: GPU acceleration is not available for browser pools.

## Managed Auth

Managed Auth is included on all paid plans with no per-connection fees. Under the hood, it uses browser sessions to log in and keep your sessions fresh—these count toward your browser usage and concurrency like any other browser session.

Auth sessions are fast (typically 5-30 seconds each). Kernel monitors session health and re-authenticates automatically when sessions expire—most stay valid for days. For example, keeping 100 auth connections logged in typically costs less than \$5/month in browser usage.

## Concurrency limits

| Feature                                                       | Developer (free + usage) | Hobbyist (\$30 / mo + usage) | Start-Up (\$200 / mo + usage) | Enterprise |
| ------------------------------------------------------------- | ------------------------ | ---------------------------- | ----------------------------- | ---------- |
| Reserved browsers ([browser pools](/browsers/pools/overview)) | 0                        | 0                            | 100                           | Custom     |
| On-demand browsers                                            | 5                        | 10                           | 50                            | Custom     |
| App invocations                                               | 5                        | 10                           | 50                            | Custom     |
| App invocations (per-app)                                     | 5                        | 10                           | 20                            | Custom     |
| Managed auth health check interval                            | N/A                      | 1 hour minimum               | 20 minutes minimum            | Custom     |

> Note: Browsers in [Standby Mode](/browsers/standby) count against on-demand concurrency limits.

> Note: Limits are org-wide by default unless stated otherwise. `Managed auth profiles` refer to profiles with active auth connections that Kernel maintains using your stored [Credentials](/auth/credentials) or [1Password connection](/integrations/1password). A single profile can have multiple auth connections (one per domain) — see [Profiles](/auth/profiles#multiple-auth-connections-per-profile) for details.

## Rate limiting

Kernel enforces per-organization rate limits on API requests. When you exceed the rate limit, the API returns a `429 Too Many Requests` response with a `Retry-After` header indicating how many seconds to wait before retrying.

Rate-limited endpoints include these headers on every response:

| Header                  | Description                                               |
| ----------------------- | --------------------------------------------------------- |
| `X-RateLimit-Limit`     | Maximum requests allowed per minute                       |
| `X-RateLimit-Remaining` | Requests remaining in the current window                  |
| `Retry-After`           | Seconds to wait before retrying (only on `429` responses) |

All Kernel SDKs automatically retry `429` responses up to 2 times, respecting the `Retry-After` header for delay timing. If retries are exhausted, the SDK throws a typed `RateLimitError` with the response headers accessible for custom backoff logic.

If you need higher rate limits, [contact us](https://calendly.com/d/cs5d-5vx-qp3).