Our Stack

Open Source. Battle-Tested.
Zero Licensing.

Every component we deploy is open source. No vendor lock-in, no surprise license audits, no per-core fees. Ever.

Databases

Relational, Document, Wide-Column, Search

PostgreSQL

Replaces: RDS, Cloud SQL, AlloyDB, Aurora

HA cluster with Patroni automatic failover, pgBouncer connection pooling, pgBackRest continuous backup with PITR. Read/write splitting via HAProxy.

MongoDB

Replaces: Atlas, DocumentDB

Percona Server replica set with encryption at rest (AES-256, free), audit logging, PBM backups with point-in-time recovery. MongoSync for live migration.

Cassandra

Replaces: DynamoDB (partial), Keyspaces, Astra

3-node distributed cluster. TimeWindowCompactionStrategy for time-series. LZ4 compression. Tunable replication (RF=2 or RF=3). Linear horizontal scaling.

Elasticsearch

Replaces: Elastic Cloud, OpenSearch Service

3-node search cluster with ILM (hot/warm/cold/delete). Full ELK stack: Logstash + Kibana + Filebeat. S3 snapshots. Centralized log pipeline.

Messaging & Real-Time

Brokers That Don't Charge Per Message

RabbitMQ

Replaces: Amazon MQ, CloudAMQP

3-node cluster with quorum queues (Raft consensus). Delayed Message Exchange for scheduling. Native Prometheus metrics. Unlimited message throughput.

EMQX

Replaces: AWS IoT Core, HiveMQ Cloud

MQTT 5.0 broker cluster. 300K+ concurrent connections. TCP, TLS, WebSocket, WSS. Shared subscriptions for load balancing. Built-in auth + ACLs.

Orchestration

Kubernetes Without the Markup

K3s (Kubernetes)

Replaces: EKS, GKE, AKS

CNCF-certified. 3-node HA with external PostgreSQL datastore. MetalLB for bare-metal LoadBalancer services. cert-manager for TLS. Velero for cluster backups. No $0.10/hr control plane fee.

Load Balancing

Traffic Routing That Doesn't Bill Per LCU

HAProxy + Keepalived

Replaces: ALB, NLB, Cloud Load Balancing

Dual-node with VRRP floating VIP. Sub-5s automatic failover. TLS termination with certbot. Patroni-aware health checks for database routing. Rate limiting. Zero per-request cost.

Monitoring

Full Observability at $0/month

Prometheus + Grafana + Loki + Alertmanager

Replaces: CloudWatch, Datadog, New Relic, Splunk

Unlimited metrics, unlimited logs, unlimited dashboards. Pre-built dashboards for every technology. Multi-channel alerting (email, Slack, PagerDuty). No per-host, per-metric, or per-GB fees.

Security & Automation

Hardened by Default

  • Bastion Host — fail2ban, PSAD, UFW, auditd, kernel hardening
  • Private Networking — VLAN isolation, firewall on every node
  • TLS Automation — certbot + Step-CA + cert-manager
  • Ansible IaC — idempotent, version-controlled, reproducible
  • AI Automation — config generation, validation, drift detection
The Math

Cloud Service → Our Replacement

Typical monthly costs for a mid-size production deployment.

Cloud ServiceOur ReplacementCloud Cost/moOur Cost/moSavings
RDS PostgreSQL (3-node HA)Patroni PostgreSQL cluster$2,500–5,000$300–600~85%
MongoDB Atlas (M50, 3-node)Percona MongoDB replica set$1,800–3,500$250–500~85%
Elastic Cloud (3-node)Self-hosted Elasticsearch$1,500–3,000$250–500~83%
Amazon MQ (3-broker)RabbitMQ cluster$800–1,500$0 (on messaging nodes)~100%
EKS (3-node + control plane)K3s cluster$1,200–3,000$300–600~80%
ALB + CloudWatch + DatadogHAProxy + Prometheus + Grafana$500–2,000$0 (on LB/monitoring nodes)~100%
Cloud services vs open-source replacements

* Cloud costs are typical production pricing. Bare-metal costs are the proportional server rental for that service. All software is $0 (open source).

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