Underbook
Is your hotel listed for less? Does it name the same room?
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On a hotel page with your dates, Underbook checks the booking sites Google Hotels lists and shows whether one lists your stay for less, and whether that lower price names the same room. Free for Chrome, Edge and Firefox, plus a web checker. No account.
PH · launched Nov 7, 2026 · 1 upvote (top 65%) · 0 views
Niche: comparison engines and tools · 286 launches, 33 in the last 7 days · Explore this niche →
Category and tags
- Travel & hospitality
- Analytics & BI
- B2B
- AI feature
- Commercial product
- Browser Extensions
- Chrome Extensions
- Travel
Visit website ↗ Source listing ↗
More like this: all 286 launches in comparison engines and tools →
Could you build this?
Partial The browser extension and UI are straightforward, but reliably reading Google Hotels pricing and matching room names across listings is fragile and needs real data pipelines.
What it would actually take: The stack is a browser extension plus a backend that fetches and normalizes hotel listings, likely through a SERP or hotel-data API rather than raw scraping. The hard part is matching room names and types across sites, which needs NLP or embedding-based entity matching and a labelled dataset. Maintaining access against Google's changing pages and terms also needs ongoing engineering effort.
Competitors
Other products that read as similar to this one : 320 launches clear the similarity bar, closest 8 shown.
Attention rank: #127 of 321 (itself plus its competitors, highest first, normalized so YC and Product Hunt are compared fairly).
Launched 313 days after the earliest competitor.
- ReserveTheNight · ph · 2026-10-03 · 1 upvotes · similarity 0.55
- BookHonest · ph · 2026-09-29 · 1 upvotes · similarity 0.53
- Hotels With Free Cancellation · ph · 2026-09-21 · 1 upvotes · similarity 0.51
- StayCheck: Hotel Review Companion · ph · 2026-09-08 · 1 upvotes · similarity 0.50
- Meetingpad · ph · 2026-11-05 · 3 upvotes · similarity 0.48
- HotelRoost · ph · 2026-09-22 · 2 upvotes · similarity 0.48
- petntrip · ph · 2026-10-06 · 2 upvotes · similarity 0.48
- Hotelado · ph · 2026-10-06 · 1 upvotes · similarity 0.48
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