Replace Termius, Datadog & PagerDuty with a Self-Hosted DevOps Stack: Solo Developer Savings Guide

Stop Burning Cash on SaaS: Build Your Own DevOps Stack for Under $50/Month

Solo founders and early-stage startups spend $200–$800/month on overlapping SaaS subscriptions just to manage terminals, monitor infrastructure, and respond to incidents. That's $2,400–$9,600 annually — money that compounds against your runway before you've written a single line of customer-facing code.

The fix isn't cutting corners on quality. It's taking the critical path of your operations in-house with sovereign, self-hosted tools that cost only your hosting bill (often under $50/month) and give you full control over data, uptime, and workflow.

1. Replace Termius with a Free, Faster Terminal Manager

Termius charges $9–$12/month per seat for SSH/Telnet session management. It's convenient, but it locks your connection configs into a proprietary cloud and adds a browser tab to your day-to-day workflow.

The sovereign alternatives:

• tmux + SSH config — a local ~/.ssh/config with ProxyJump entries, combined with tmux session restoration, covers 90% of what Termius does, at $0 cost.
• Windterm (open-source, cross-platform) — a graphical terminal with a session tree, git integration, and SFTP. No subscription. No cloud dependency.
• CAShell (open-source Rust CLI) — a static, musl-compiled binary that runs anywhere. Pair it with a tmux script to automate multi-server session spawning. Your configs live in a git repo you own.

Cost saved: $12–$144/month depending on team size.

2. Replace Datadog with Grafana + Prometheus + VictoriaMetrics

Datadog's pricing starts at $15/host/month and escalates sharply with data volume. A solo dev running 3–5 VPS instances pays $75–$150/month just for infrastructure monitoring, before any APM or log ingestion costs.

The sovereign stack:

• Prometheus — scrape metrics from your services, VPS, and containers. Runs on a single machine under 500 MB RAM.
• Grafana (OSS, self-hosted) — build the exact dashboards you need. Community plugin library is extensive.
• VictoriaMetrics — long-term metric storage at a fraction of Datadog's price. Handles 10× the time series at the same resource cost.
• Loki — centralized log aggregation if you need log-based observability. Pairs natively with Grafana.

Deploy the full stack on one $5–$10 VPS with Coolify. Total cost: hosting bill + your time. No per-host fees. No egress charges. No vendor lock-in on your operational data.

Cost saved: $60–$150+/month (Datadog's per-host pricing is non-linear; savings grow with scale).

3. Replace PagerDuty with a Telegram Bot + Uptime Kuma

PagerDuty's Free tier is limited; the Essentials tier starts at $21/user/month with hard caps on alert volume. For a solo founder, that's $252+ per year before you're actually using it.

The sovereign stack:

• Uptime Kuma — open-source, self-hosted uptime monitoring. Set up alerts for HTTP endpoints, TCP ports, and scripted checks in under 10 minutes. Free, forever.
• Telegram bot — route alerts via a simple webhook to a private Telegram group. You get a notification on your phone at $0 cost. No per-alert pricing. No tier upgrades.
• ntfy.sh (self-hosted) — an alternative push-notification layer that works on any device, no account required. Pairs with Grafana alerting rules and Prometheus Alertmanager.

Cost saved: $21–$300+/month depending on PagerDuty tier and alert volume.

4. Replace Odoo / Heavy ERP SaaS with a Purpose-Built Go Monolith

Odoo Cloud (community edition self-hosted) or SaaS variants of ERP platforms charge per-user per-month, with implementation fees that can exceed $1,000 in year one. For a solopreneur running a small operation, that's $150–$500/month for a tool that's 80% bloat you'll never use.

Build the 20% you actually need as a single Go service:

• Go + GORM/Fiber — REST API layer in under 500 lines for core entities: products, inventory, orders, suppliers.
• PostgreSQL — one schema, one backup routine, no vendor abstraction layer.
• Coolify — deploy your Go service to a single VPS with a visual dashboard. No Kubernetes, no AWS, no per-container pricing. One $10 VPS runs the app + Postgres + monitoring stack.
• Zero tracking — all data lives in your PostgreSQL instance. No telemetry. No third-party data pipelines.

Cost saved: $150–$500+/month versus commercial ERP SaaS pricing.

The DevOps Efficiency Stack at a Glance

Here's the full cost comparison for a solo founder running 2–3 VPS instances:

Commercial SaaS stack (monthly)

• Termius: $12
• Datadog (basic, 2–3 hosts): $90
• PagerDuty Essentials: $21
• Odoo Cloud / ERP SaaS: $300
• Total: ~$423/month

Sovereign stack (monthly)

• One VPS ($10–$20, e.g. Hostinger VPS or a Hetzner box): $15
• Windterm / CAShell: $0
• Prometheus + Grafana + VictoriaMetrics + Loki: $0 (same VPS)
• Uptime Kuma + Telegram bot: $0
• Go monolith + PostgreSQL: $0 (same VPS)
• Total: $15/month

Net savings: ~$408/month, or ~$4,896/year. That's a year of runway you can put into customer acquisition, product development, or survival margin.

How to Deploy This Stack in One Afternoon

Use Coolify on a single VPS as your orchestration layer. Coolify is a self-hosted PaaS — a visual dashboard that deploys Docker containers, manages DNS, provisions SSL certificates, and handles backup scheduling. No Kubernetes required.

Recommended single-VPS layout:

1. Provision a VPS with 4 GB RAM and 2 vCPU (Hetzner, Hostinger, or any provider with a Tailscale-friendly network).
2. Install Coolify and add your app containers: Go monolith, PostgreSQL, Prometheus, Grafana, VictoriaMetrics, Loki, Uptime Kuma.
3. Configure Tailscale mesh networking so all your machines (laptop, VPS, future second VPS) share a private network with zero inbound ports open.
4. Connect Grafana to Prometheus and VictoriaMetrics. Build your first dashboard in 15 minutes.
5. Set up an Alertmanager rule in Prometheus pointing at your Telegram webhook. Route Grafana alerts the same way.
6. Point Uptime Kuma at your critical endpoints. Set alerts to the same Telegram channel.

Every component is open-source. No vendor phone call. No "your data was used to train our ML model." No 30-day cancellation notice on a tool that's critical to your operations. You SSH into the VPS, you own the stack.

The Bigger Picture: Sovereign Infrastructure as a Competitive Advantage

Self-hosted infrastructure isn't just a cost-cutting exercise. It's a structural advantage:

• Zero tracking — no third party knows your infrastructure topology, your uptime patterns, or your operational data. That matters when you're serving enterprise customers who ask about data residency.
• Single-tenant control — you're not sharing a node with another customer's workload. Performance is predictable.
• Tailscale mesh — your private network spans laptops, VPS, and future data centers with no VPN appliance, no open ports, and no per-seat pricing.
• Rust + Go — the languages in this stack compile to static, portable binaries. Your monitoring agent, your CLI tool, and your ERP service all run anywhere, on any architecture, with no runtime dependency.

For a solopreneur, the message is clear: the $423/month you're paying for overlapping SaaS tools is not a floor. It's a leak. Fix it in one weekend, and every dollar after that works for your product, not for your vendors.