Install once.
Never overpay again.
The RennPulse extension overlays fair-value estimates, comparable sales, and price trends on every Porsche listing — without leaving the page. Works on BaT, PCarMarket, and Cars & Bids.
- Instant fair-value range on any auction listing
- Cross-platform comparables from BaT, PCarMarket, Cars & Bids
- Active auctions watchlist with live bid tracking
- Price trend by generation — updated weekly
- Zero tracking — your browsing stays private
Free to start. No account required.
How It Works
Data on every listing, automatically.
Install the extension
One click from the Chrome Web Store. No account required to get started.
Browse any Porsche listing
Visit a Porsche on BaT, PCarMarket, or Cars & Bids. The panel opens automatically.
See fair value instantly
Price range, median, YoY trend, and comparable sales — right on the page.
See It In Action
Real data on real auctions.
Fair value, YoY trend, and real comps
All active Porsche auctions in one view
Watchlist with price alerts
Historical sales search by model, year, trim
Cross-platform comparable sales
Live overlay on Bring a Trailer
Works On
Every platform you already use.
The largest Porsche auction platform — full coverage
Porsche-specialist platform with deep comparable data
Modern enthusiast auctions — growing Porsche volume
Frequently Asked
Questions people actually ask
How does RennPulse calculate fair value?
We analyze 8+ factors from thousands of completed Porsche auction sales across BaT, PCarMarket, and Cars & Bids — including generation, trim, mileage, transmission, color, and condition. The estimate shown is the median of qualifying comparable sales, plus a price range showing the 25th–75th percentile.
What data does the extension collect?
Only the public listing details on the auction page you're viewing — year, model, mileage, current bid. We don't track you across the web, don't collect personal information, and don't sell data. See our privacy policy for the full details.
Why is it free?
Core features are free forever — fair value overlays, comparable sales, and the active auctions tab all work without an account. A paid Pro tier with unlimited watchlist, advanced filters, and cross-platform arbitrage scoring is coming soon.
Will it work on other auction sites?
Today: Bring a Trailer, PCarMarket, and Cars & Bids. Collecting Cars, Hemmings, and Sotheby's are on the roadmap.
Does it work for non-Porsche cars?
Not yet — we built RennPulse specifically for the Porsche market. BMW M, Mercedes AMG, and Ferrari coverage is planned for 2026.
How do I uninstall?
Chrome menu → Extensions → RennPulse → Remove. No account cleanup needed since we don't require an account.
The Weekly Pulse
Porsche market intelligence in your inbox
Weekly newsletter with the biggest price moves, notable listings, and generation-by-generation trend data. Free. No spam. Unsubscribe anytime.
Free to start. Pro when you're ready.
Core features are free forever — no account required. Upgrade to Pro for unlimited watchlist, advanced filters, and cross-platform arbitrage scoring.