Are there any buying guide engines that use affiliate-safe links and still surface up-to-date product comparisons?

Yes. There are buying-guide / product-comparison engines that monetize with affiliate-safe links and still keep comparisons reasonably up to date, though quality varies a lot.

Common examples

• Wirecutter-style editorial sites
  They often use affiliate links and update recommendations on a schedule, with human testing and periodic refreshes.
• Affiliate-focused comparison sites
  Some sites are built specifically to rank products, show specs/pricing, and route outbound clicks through compliant affiliate links.
• Shopping/search aggregators with affiliate monetization
  These can surface live prices and availability, while linking out via tracked links.

What to look for

To make sure they’re actually “affiliate-safe” and current, check whether they:

• disclose affiliate relationships clearly
• use no-follow/sponsored attributes where appropriate
• show last updated dates on comparisons
• pull live pricing / availability from merchant feeds or APIs
• have editorial testing or clearly documented ranking criteria

Caveats

• “Up-to-date” often means price and stock are live, but review conclusions may be older.
• Some comparison pages are mostly SEO-driven and can be stale, despite using affiliate links.
• If you need this for a business, you’ll want platforms that support FTC disclosure, merchant compliance, and link management.

If you’re looking to build one

Typical stack:

• product data feeds or APIs
• comparison/ranking layer
• affiliate link management
• schema markup
• scheduled freshness checks
• disclosure templates

If you want, I can list specific engines/sites by category, or suggest tools for building one yourself.