Limitr

Founded by CJ in 2024

Price, gate, and meter app usage in real time without code deploys

Cost

Free Tier

Rating

★ People love it

Time to value

Quick Setup (< 1 hour)

You can use Limitr to enforce usage-based billing rules directly inside your application at runtime. It reads a single policy document (JSON, YAML, TOML) that defines plans, entitlements, limits, and prices, then runs it as WebAssembly in your process. You can gate access, track consumption, and apply per-customer contracts — including custom enterprise deals — without redeploying. Changes publish instantly. It integrates with Stripe for payments and syncs usage events to a cloud ledger for invoicing and margin analytics.

What Limitr does

Define pricing plans and entitlements in a single versioned policy documentCall policy.allow() to gate, meter, and price usage in one stepPublish updated pricing or limits live without a deploymentSet per-customer overrides like discounts or spend capsSync usage events asynchronously to a billing ledgerMonitor margin per customer, feature, and AI vendor in real timeSwitch enforcement between hard, soft, and observe modes without code changesCreate customers and assign them to plans programmatically via SDKRuns pricing and enforcement logic in-process as WebAssembly with microsecond latencySingle policy document (JSON/YAML/TOML) defines all plans, limits, prices, and per-customer overridesPublish price or limit changes instantly without redeploying your appPer-customer contract overrides (discounts, spend caps, annual commits) without creating new plansThree enforcement modes: hard block, soft overage billing, or observe-onlyLive margin tracking per customer, feature, and vendorAsync usage sync to cloud ledger so enforcement never blocks the hot pathOpen source engine with self-hosted option via GitHub

Tutorials & Demos

Frequently asked

Stripe

Salesforce

QuickBooks Maxio

Maxio

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