Cactus

Paradigm shift

There has to be a better way

Cactus - a lightweight "deploy anywhere" TP-monitor that finanncial, medical and even defense systems could rely on. Because AI slop era has made microservice architecture dangerous and overly complex.

Standing on giants shoulders

Modern Transaction Monitor

Priority queuing, transaction isolation, and traffic management built leveraging Rust. Lightweight, fast and easily deployable.

Know every move

Log everything ideology

Every transaction is logged with its compute costs, user info, errors etc. making it effortless to support and attribute application profits, follow transactions & user traffic

Banking level Security

Unhackable by Architecture

Security lives in the transaction monitor, not the application. Strict transaction validation and suprisingly good bot-deflection. Cactus deos not allow any fiddling around the backend.

Capabilities

Safeguard your data: air gapped business logic, cactus bridge transacting with users, logging all traffic. Guaranteed banking grade security and speed. CICS and Tuxedo solved this. We made it available to anyone, fast and lightweight as ever

100,000+ Transactions Per Second

Native Rust execution with zero GC pauses and no interpreter overhead. Cactus sustains 100k+ TPS on commodity hardware — the kind of throughput that previously required mainframe iron or seven-figure cloud spend.

Priority Traffic Management

Classify every transaction by priority class at submission. The scheduler guarantees that your most critical workloads — payment confirmations, fraud checks, auth — are never delayed by background jobs or low-priority batch processing.

Application Cost Logging

Real compute cost for every transaction — CPU, memory, latency — logged at the monitor level with no sampling. Know exactly what each endpoint, customer, or workflow costs to run. Chargeback, capacity planning, and anomaly detection become trivial.

Unhackable by Architecture

Memory safety from Rust eliminates the entire class of buffer overflow and use-after-free vulnerabilities. Transaction isolation at the monitor level means a compromised transaction cannot corrupt adjacent state. Security is structural, not bolted on.

Your Infrastructure, Your Rules

On-premise, air-gapped, or private cloud. BSD licensed with no usage fees, no telemetry, no vendor lock-in. The transaction monitor your systems run on should be owned by you — not a company that can change the pricing model next quarter.

Configurable for Any Application

Priority tiers, isolation boundaries, logging depth, retry and timeout policy — every rule in Cactus is a config, not a recompile. Drop it in front of a monolith, a mesh of microservices, or a single endpoint that can't afford to go down. Cactus bends to your architecture instead of demanding you rebuild around it.

A Paradigm Shift That Guarantees Security

Air-gapping business logic behind a transaction monitor isn't how most engineers were taught to build backends — it means unlearning the idea that security is something you bolt onto application code after the fact. Once you make the shift, entire classes of vulnerabilities become structurally impossible, not just mitigated.

Use cases

Built for the workloads that cannot fail.

Cactus is for systems where throughput, correctness, and cost visibility are non-negotiable. If your backend is mission-critical, it belongs behind a transaction monitor.

Payment Processing

Every payment is a transaction that must complete exactly once, in the right order, with full cost attribution. Cactus was built for exactly this — guaranteed delivery, no duplicate execution, full audit trail.

Financial Trading

Latency-sensitive order routing and execution where microseconds matter and priority lanes are required. Cactus schedules market-critical traffic ahead of administrative workloads — deterministically, at 100k+ TPS.

Fraud Detection Pipelines

Real-time fraud checks that must complete before a transaction is approved. Priority class guarantees fraud signals are evaluated in the correct order — never delayed by background analytics jobs running on the same infrastructure.

Enterprise API Gateways

High-volume API infrastructure where SLA tiers matter. Route premium customers to priority lanes, log the exact cost of every request, and guarantee that a noisy tenant cannot degrade the experience of others.

Multi-Tenant SaaS Backends

Tenant isolation at the transaction monitor level. Cost logging per tenant enables accurate billing and capacity planning. Priority lanes ensure enterprise customers get the throughput they paid for, even when the platform is under load.

Regulated Infrastructure

Healthcare, defence, and government workloads with strict auditability requirements. Full transaction logs, cost attribution, and deterministic execution provide the paper trail that compliance demands — without a separate audit system.

There has to be a better way

Capabilities

Built for the workloads that cannot fail.

We'd love to chat.