Holdify

Holdify

Revenue Firewall for AI apps

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Holdify is a Revenue Firewall for AI-first SaaS. It connects your billing (Stripe or Polar) to your API and LLM gateway so access and spend follow each customer’s plan in real time. Set per-tenant budgets, rate limits, and model allowlists. Enforce hard caps, auto-downgrade models, or block on overage. Detect abuse and anomalies. Sync entitlements automatically, no custom webhook glue.
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Free
Launch tags:API•SaaS•Developer Tools
Launch Team / Built With
Checkmarx Developer Assist for AI IDEs
Security linter for vibe coding: fix vulns as you build
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What do you think? …

Alix
Maker
📌
Hey 👋 I built Holdify because I kept running into the same problem: payment providers handle billing great, but who handles API access? Every time I built a paid API, I had to: • Set up webhook handlers for subscription events • Build logic to create/revoke keys on plan changes • Implement rate limiting from scratch • Handle edge cases like failed payments It was weeks of work that had nothing to do with my actual product. So I built Holdify - connect your Polar or Stripe account once, and API access syncs automatically. New subscription? Key created. Upgrade? Limits increase. Cancel? Access revoked. Currently live with native Polar integration, Stripe coming soon. Would love your feedback! What features would make this more useful for your projects? 🔗 Try it free: https://holdify.io