The team behind the gateway
Synthorai is an AI gateway with governance built in, available as SaaS, as a managed Enterprise instance or inside your own network. We built it because at every company we worked at, the same plumbing kept getting rebuilt: provider failover, usage metering, compliance reviews. This time we built it once, as the product itself.
What we build
One OpenAI-compatible endpoint in front of the models of the major providers: chat, image, speech, video and realtime voice. Behind it sit prompt-cache affinity (so cache discounts apply), metered billing designed to survive crashes and a BYOK vault with per-model rules.
On SaaS there is no platform fee and no BYOK surcharge, and model usage is at provider list price. We charge for the Enterprise and private deployment platform.
Who we are
We are a small engineering team with backgrounds in security and compliance. Before Synthorai, we spent years building key management, audit trails, and data-governance systems.
We have run AI workloads in production since GPT-3, and this layer of the stack is the part we know best: how tokens get metered, how caches behave across providers, and how a gateway should fail without corrupting billing.
That experience set the defaults: encryption and least privilege everywhere, no prompt retention, and billing correctness treated as a hard requirement rather than a feature.
How we work
We write up how the hard parts work, including the failure modes: how billing stays correct when a request dies mid-stream, how we audit our own cache accounting, and how prompt caching maps across providers. Where a claim can be verified, we link the evidence: Engineering blog →
Your data is not our product
By default you can only reach models whose providers do not train on your data. Anything else requires an explicit opt-in, enforced per workspace. Request and response bodies are forwarded and not stored by default, and we keep request metadata for billing. Each workspace can be pinned to the US, EU or APAC.
Company
Synthorai Technology Inc. · Mountain View, CA 94043 · Founded 2026
support@synthorai.ai · dev.to/synthorai · x.com/synthoraihq · linkedin.com/company/synthorai-hq · github.com/synthorai-io