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HammerAlert
One calendar for 150+ auction houses worldwide
HammerAlert is a free, deduplicated calendar of upcoming auctions at 150+ auction houses worldwide — Christie's, Sotheby's, Bonhams, Drouot, Phillips, Heritage, and a long tail of regional specialists. Browse the calendar by category (jewellery, watches, modern art, wine), region, or specific house, then subscribe to a personalised ICS feed that lands in Apple Calendar, Google Calendar or Outlook. No more chasing 50 newsletters.
Hi everyone — I'm Laurens, the founder of HammerAlert.
I built this because following the global auction calendar means subscribing to roughly fifty different house newsletters. Each only covers their own sales, many duplicate each other in the broad seasons (May/November jewellery, March/October contemporary art), and the marketing-heavy emails arrive months ahead for sales you may not care about. There was no single place to ask "what's on this week across Christie's, Sotheby's, Bonhams, Drouot and the long tail of regional houses?"
HammerAlert pulls calendars from 150+ auction houses worldwide, deduplicates listings, classifies them by category (jewellery, watches, modern + contemporary, wine, Asian art, etc.) and region, and lets you subscribe to just the slices you care about as an ICS feed that shows up in Apple Calendar / Google Calendar / Outlook.
Free, no signup required to browse. Signup only if you want a personalised feed.
Hard parts so far:
1. Scrapers for 150+ source sites that change their HTML weekly, some lazy-loading via JavaScript so Playwright + browser rendering is needed.
2. Dedupe — "Modern & Contemporary Day Sale" vs "Modern + Contemporary Afternoon Session" across houses without merging things that shouldn't be merged.
3. Inferring location and category from titles ranging from "Jewels" to "Important Magnificent Jewels Including The XYZ Collection".
Happy to answer questions on architecture, scraping at scale, the dedup approach, or the calendar UX.
— Laurens
About HammerAlert on Product Hunt
“One calendar for 150+ auction houses worldwide”
HammerAlert was submitted on Product Hunt and earned 0 upvotes and 1 comments, placing #132 on the daily leaderboard. HammerAlert is a free, deduplicated calendar of upcoming auctions at 150+ auction houses worldwide — Christie's, Sotheby's, Bonhams, Drouot, Phillips, Heritage, and a long tail of regional specialists. Browse the calendar by category (jewellery, watches, modern art, wine), region, or specific house, then subscribe to a personalised ICS feed that lands in Apple Calendar, Google Calendar or Outlook. No more chasing 50 newsletters.
On the analytics side, HammerAlert competes within Productivity, Art and Calendar — topics that collectively have 705.9k followers on Product Hunt. The dashboard above tracks how HammerAlert performed against the three products that launched closest to it on the same day.
Who hunted HammerAlert?
HammerAlert was hunted by CorLozz DataBytes. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
For a complete overview of HammerAlert including community comment highlights and product details, visit the product overview.
CorLozz DataBytes