Cloudflare for Startups gives credits for a year in three tiers: Tier 3 $10K (bootstrapped or under $1M raised, no minimum funding), Tier 2 $100K (under $5M raised or partner funded) and Tier 1 $350K ($5M+ raised or partner funded).
Credits cover usage-based services such as Workers, D1, Queues, Workers AI (up to $50,000) and R2 (up to $10,000). Core security and networking features are included at no cost, with three enterprise domains and unlimited Business and Pro plans.
You qualify if your startup was founded within the last 10 years, funded up to Series B, is building a technology product and has a live public website.