SaaStr AI Annual 2026 Sponsor Floor Flips: 83% of Departing Sponsors Were Pre-AI or Legacy B2B

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SaaStr's post-event lead leaderboard shows the sponsor base rebuilt around AI: 40 of 48 sponsors who didn't return (83%) were classic pre-AI B2B or legacy services firms, collapsing 'old B2B' from a majority to a minority of the floor in a single year. The new Diamond/Platinum tier is AI-native and infrastructure-first — Artisan, Google Cloud, Replit, Firebolt, Flatfile, G2, Vercel and Lovable — a direct map of where B2B budget is concentrating in 2026.