About VizCanary

VizCanary is a free tracker of pricing, licensing, SKU-retirement, end-of-support and M&A changes across 64 data and BI tools. The goal: nobody should learn about a 40% price increase from their renewal quote.

How a change gets on the site

1. we watch the sources
   Every night we check vendor pricing pages, changelogs, release notes, lifecycle policies and RSS/GitHub feeds, plus endoflife.date for support dates, and diff them against the last snapshot.
2. something changed
   A fast AI model pulls out the structured facts (product, change type, dates, old and new prices) and a verbatim quote. Code then checks that the quote really appears on the source page word for word.
3. it looks real
   A second, stronger model fact-checks the record against the source. Code applies strict rules (prices must appear in the source, dates must match the quote, no duplicates), and an editor reviews what’s left.
4. it’s published
   We add guidance: who’s affected, what it costs, when to act, a decision tree and alternatives. It’s written from the verified facts only, and any number not in the record gets flagged.

Ground rules

• Every change has a source and a verbatim quote. No invented numbers. Where the vendor doesn’t publish a price, our calculators ask for yours.
• List prices only. What you actually pay depends on your contract.
• Editorial firewall. Sponsor slots are labeled and never change facts, dates, severity or ordering. Alternatives are never for sale.
• Not advice. The guidance is a starting point for your own legal and procurement review.

Credits & sister site

Support dates partly from endoflife.date (MIT). VizCanary is the sister site of Dead Canary, which tracks API shutdowns & deprecations. Data: 58 changes, free under CC BY 4.0 via the JSON API.

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