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Not Diamond review

Updated September 28, 2026 · DeployCue Editorial Team · Facts checked September 26, 2026

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Our verdict

Not Diamond suits teams that want model routing across a small set of providers and already hold their own keys. Routing covers 2 providers, a free tier is offered, and usage is charged pay-as-you-go rather than by seat, so a small build stays cheap.

Key facts

Best for
Small teams routing a few providers on their own keys.
Fee model
Pay-as-you-go, $0.05 per million tokens routed; enterprise volume discounts↗
Providers routed
2↗
Bring your own key
Yes↗
Free tier
Yes↗
Legal entity
Not Diamond, Inc.↗
Headquarters
United States↗
Support channels
Email, Help-centre↗
Official website
notdiamond.ai

Facts checked September 26, 2026, 5 sources

Pros and cons

Pros

  • You can bring your own key, so provider billing stays with the model vendor
  • Routing spans 2 providers rather than a single upstream
  • A free tier is offered for trying the routing layer
  • Fees are pay-as-you-go with enterprise volume discounts

Cons

  • Routing covers 2 providers, near the low end for the category
  • Support runs on email and help centre only
Not Diamond

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Scored 8.8 / 10 by DeployCue.

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Who it suits

  • Teams already holding provider keys who want routing in front of them
  • Builders running model choice at low request volume
  • US based teams, as the company is registered in the United States

Who should look elsewhere

  • Teams wanting a broad provider catalogue, since UCloud routes from 4 or more
  • Teams wanting self-hosted open source, which LiteLLM provides at no cost under an MIT licence
  • Buyers who prefer a flat subscription, as Salad bills Flat monthly subscription or pay per token

What it does well

Not Diamond sits in front of your own model credentials. Bring your own key is supported, so provider contracts and invoices stay with each vendor while the routing layer picks between them. Routing currently spans 2 providers, a deliberately small set that suits apps with a fixed set of model choices. The company behind it is Not Diamond, Inc., registered in the United States, and support runs on email and help centre.

Pricing

Billing is pay-as-you-go, a charge for the tokens you route rather than a seat fee or an annual commitment, and enterprise buyers can ask about volume discounts. A free tier is offered, so a small team can test routing behaviour before it carries any spend. Because you bring your own key, model provider prices sit on your own account and outside this routing charge.

How Not Diamond compares

Frequently asked questions

How is Not Diamond priced?+

Not Diamond bills pay-as-you-go for the tokens you route, with no seat fee, and enterprise buyers can ask about volume discounts. The charge covers routing across 2 providers. Because you bring your own key, each model vendor bills you separately for the tokens you send to them.

Can I use my own model keys?+

Yes. Bring your own key is supported, so provider credentials and vendor contracts stay with you while routing still covers 2 providers. The routing charge sits on top of model provider prices, which is worth keeping separate when you forecast a bill.

Is there a free tier?+

A free tier is offered, so you can try routing across 2 providers before carrying any spend. It suits small internal tools and prototypes. Model usage on your own keys still follows each provider's own pricing, so the free tier covers routing rather than inference.

How many providers can Not Diamond route to?+

Routing covers 2 providers. That is a narrow set, so it works well when your application only needs a small set of model choices. Teams chasing a much larger catalogue may prefer a gateway built for breadth.

Who runs Not Diamond?+

Not Diamond is provided by Not Diamond, Inc., registered in the United States. The legal entity and country are stated in its legal pages, which matters if your procurement checklist needs a named counterparty and a jurisdiction.

How do I get support?+

Support runs on email and help centre. That means email and a help centre rather than live chat or a phone line, so time-sensitive issues may take longer to resolve than at a gateway with round-the-clock staffed support.

Sources

Compiled from 5 source pages, checked September 26, 2026. We did not open an account.

Not Diamond

Not Diamond

Small teams routing a few providers on their own keys.

8.8/10See alternatives