Azure API Management GenAI gateway alternative
Azure API Management GenAI gateway is Azure API Management policies for token limits, semantic caching, load balancing and metrics in front of Azure OpenAI. The matrix below says what each product is and how it bills; the only numbers are TokenZero's own measurements and prices.
TokenZero is a BYOK alternative to Azure API Management GenAI gateway: you keep your provider keys and list prices, add 1.52 ms p50 of measured overhead, and every call returns a signed receipt. On 100,000 reference calls on gpt-6.1-sol, cache formatting alone saves $285 a month, $242 net after the 15% fee; Azure API Management GenAI gateway reports differently.
· Source: Azure API Management GenAI gateway documentation at https://learn.microsoft.com/azure/api-management/genai-gateway-capabilities read 2026-10-26; TokenZero overhead from /benchmarks; prices from table 2026-10-26
At a glance
- Compared with
- Azure API Management GenAI gateway (cloud API gateway)
- TokenZero overhead
- 1.52 ms p50 / 3.42 ms p95 (measured, /benchmarks)
- BYOK
- TokenZero: always · Azure API Management GenAI gateway: Azure OpenAI deployments
- Receipts
- TokenZero: signed per call · Azure API Management GenAI gateway: none (metrics)
- Billing
- TokenZero: 15% of verified savings · Azure API Management GenAI gateway: API Management tier plus Azure OpenAI token prices
- Reference saving (gpt-6.1-sol, 100k calls)
- $285/month from prefix caching (computed)
- Net after 15% fee
- $242/month (computed)
- Parity floor
- 99.8%
- Free tier
- $500/month routed
- Vendor page read
- 2026-10-26
TokenZero vs Azure API Management GenAI gateway: what each one is (vendor page read 2026-10-26)
| Dimension | TokenZero | Azure API Management GenAI gateway |
|---|---|---|
| Category | BYOK savings gateway | cloud API gateway |
| Hosting | hosted | Azure |
| Bring your own key | always; keys pass through and are never stored | Azure OpenAI deployments |
| Open source | CLI, MCP server, audit core and GitHub Action Apache-2.0; gateway hosted | closed |
| How it bills | free up to $500/month routed; then 15% of verified savings, 3x-ROI-or-$0, capped plans | API Management tier plus Azure OpenAI token prices |
| Caching | prompt-cache formatting + exact and semantic response cache | semantic caching policy |
| Routing | cascade to the cheaper sibling inside one provider, 99.8% parity floor, advisory by default | load balancing across deployments |
| Savings receipts | Ed25519-signed per call, hash-chained, public key published | none (metrics) |
| Gateway overhead | 1.52 ms p50 / 3.42 ms p95 (measured, /benchmarks) | not measured by TokenZero |
| Data retention | metadata only; ZDR mode available | see vendor docs |
| Net saving, 100k gpt-6.1-sol calls/month (prefix caching only) | $242 after fee | — |
What you keep when you move from Azure API Management GenAI gateway
your Azure deployments: X-TokenZero-Upstream points the gateway at them.
- No gateway tier to size: hosted, free up to the monthly free tier, then a share of verified savings.
- Receipts signed with a published key, verifiable offline.
The change
OPENAI_BASE_URL=https://tokenzero.sh/v1
ANTHROPIC_BASE_URL=https://tokenzero.sh
# keep your provider keys exactly as they areThen npx -y @tokenzero/cli doctor to confirm the gateway, signer and pricing table.
Questions people ask
Is TokenZero a drop-in alternative to Azure API Management GenAI gateway?
Azure API Management GenAI gateway is Azure API Management policies for token limits, semantic caching, load balancing and metrics in front of Azure OpenAI. TokenZero is a BYOK gateway: you keep your Azure deployments: X-TokenZero-Upstream points the gateway at them, and every call comes back with a signed receipt. No gateway tier to size: hosted, free up to the monthly free tier, then a share of verified savings.
What does switching from Azure API Management GenAI gateway to TokenZero save?
It depends on your prompts; on the reference workload (100,000 calls of 2,000 input with a 1,500-token static prefix and 300 output on gpt-6.1-sol, table 2026-10-26) prefix caching alone cuts $700 to $415 a month, $285 saved and $242 net after the 15% fee; exact-cache hits and cascade routing add to that. The receipts show the real figure.
Can I keep Azure API Management GenAI gateway and add TokenZero?
Usually yes: chain them by pointing Azure API Management GenAI gateway's upstream at https://tokenzero.sh (or TokenZero's X-TokenZero-Upstream at Azure API Management GenAI gateway); the receipt still prices the request at list and records what the gateway did.
How is the 15% fee computed?
On verified savings only: list-price baseline minus provider-reported actual cost, per signed receipt. A cycle whose savings are below 3x the fee is billed $0; Pro Cap and Scale Cap add monthly ceilings. The first $500 of routed spend each month is free.