Can Silktide test intranet sites?

Yes, provided Silktide's crawlers can reach the host. Intranets that exist only on a corporate network need one of:

• Network rules allowing Silktide (often via proxy IPs)
• A securely exposed staging URL
• Appropriate authentication

Treat intranet content as sensitive: use least-privilege test accounts and understand what data Silktide stores.

Wanting Silktide to run inside your network is a different request. Silktide does not offer an on-premise version.