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Routing is crowded. A baseline count is the open ground.
Routers such as OpenRouter and Not Diamond already route across providers. Parezen’s planned difference is to switch only after quality parity on your own replayed requests, then count the saving against your own baseline. That combination is not built. This page does not quote competitor prices.
OpenRouter
Stripe agreed to acquire it, August 2026. Model router and marketplace.
Portkey
AI gateway.
Langfuse
Acquired by ClickHouse, January 2026. Open-source LLM observability.
Arize
Acquired by Dynatrace, completed 1 October 2026. AI observability.
LiteLLM
Independent open-source gateway. Core is free.
Ascerta
Enterprise AI cost and value tracking. Raised an $18M Series A on 30 September 2026.
Cloudflare and Datadog also ship gateway or cost features inside larger platforms. Dated notes below are from 25 September 2026 and do not claim a competitor’s current price list. Provider and company names are not customers.
| Question | Parezen |
|---|---|
| Counted against your own baseline? | Designed as estimated, then realised, then counted against your own baseline. The sample ledger shows the statuses. That count is not built. |
| Guarantee | If we don't save you more than we charge, you pay nothing that month. That sentence is the monthly savings share only. It does not apply to the subscription. The fee is capped at 5% of the pre-change AI spend of the workloads we optimise (measured in your free X-ray). No spend-band platform fee. |
| Cost per task | Would be part of FinOps, on every paid band. The sample dashboard can show a task cost. It is not a customer report. |
| Self-host | We would open-source the core. There is no public repository and no install. You would bring Postgres. The open-source gateway is designed to need no licence key. Prompts are designed to stay off by default. |
What to ask any gateway
- Do they count a saving against your own baseline, or only estimate it?
- Is there a month where you pay nothing if the saving does not beat the fee?
- Can finance see cost per successful task, not only cost per token?
- Can you self-host so prompts stay on your network?
- OpenRouter
Dated notes. No invented feature matrix.
- LiteLLM
Dated notes. No invented feature matrix.
- Portkey
Dated notes. No invented feature matrix.
- Helicone
Dated notes. No invented feature matrix.
- Cloudflare
Dated notes. No invented feature matrix.
- Vercel
Dated notes. No invented feature matrix.
- Kong
Dated notes. No invented feature matrix.