Both claim to cut your Claude bill. They solve different problems. Here's how to pick.
Run the free audit at aiusage.ai →| Dimension | AIUsage | ZON (Zero Overhead Notation) |
|---|---|---|
| Pitch | Stop overpaying for Claude — 70-90% on same prompts | 50% fewer tokens than JSON for LLM payloads |
| Savings claim | 70-90% (6 verified cases: 76-84%) | 50% token reduction on structured payloads |
| Workload coverage | Any Claude API workload — support, agents, code review, content, CRM codegen | Structured-data payloads to LLMs |
| Setup | One-line code change (swap API endpoint) | Python + TypeScript libs |
| Free audit | Yes — paste bill, see number, no signup | Typically no |
| Mechanism disclosure | Private — "try it, the number is testable" | Tabular encoding for arrays + minimal syntax overhead |
| Scope | Broad (workload-agnostic) | data format change |
If your Claude usage is structured-data payloads to llms and you're comfortable with python + typescript libs, ZON (Zero Overhead Notation) is purpose-built for that shape. 68 GitHub stars if that matters to you.
If your Claude spend spans multiple workload types (support automation, agent loops, code review, content drafting, daily coding) or you want to audit your bill before you commit to any cost-reduction tool, AIUsage gives you the number first. No CLI install, no platform dependency, no code rewrite.
ZON requires rewriting your data serialization code. AIUsage works without touching your prompts or code.
Across six audited workloads, AIUsage's measured delta was 76-84% on the same prompts, blind A/B tested: