● Live · 3 Real Browser Engines · $0 SaaS Costs

Cross-Check

The cross-browser integrity engine that catches what Browserbase can't. Real Chromium, Firefox, and Safari — tested across desktop, mobile, and tablet. Every week. Automatically.

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Real Engines

Viewport Combos

SaaS Cost

22.4%

Diff Caught

—

Live SHI: saffrondesigns.io (all 3 engines)

Why Cross-Check?

Feature	Browserbase ($39/mo)	BrowserStack ($200+/mo)	Cross-Check ($50/mo)
Real Chromium	✓	✓	✓
Real Firefox	✗ Chromium only	✓	✓
Real Safari (WebKit)	✗ Chromium only	✓	✓
Pixel diff between engines	✗	✗	✓
Cross-browser SHI score	✗	✗	✓
Embeddable badge	✗	✗	✓
Weekly Telegram reports	✗	✗	✓
Deploy gate (CI/CD)	✗	✗	✓
Price	$39/mo	$200-300/mo	$50/mo

The 22.4% Problem

Browserbase said goldolivetree.com scored 95 A+ on mobile. Cross-Check found a 22.38% rendering difference between Chromium and Safari. Firefox timed out entirely. Browserbase missed both.

goldolivetree.com — Mobile Viewport

22.38%

Chromium vs Safari diff

Firefox score (timeout)

66.5

Cross-browser composite

Browserbase reported: 95 A+ (Chromium only). Cross-Check reported: 66.5 C (all 3 engines). That's the difference between "it works" and "it works for everyone."