Tink vs Envoy
Envoy is a high-performance L4/L7 proxy and service-mesh data plane. That is not a mechanic. Tink installs in one command, watches the Linux server, explains what is wrong, and helps you fix it.
Envoy keeps clusters green. Tink answers “why is this VPS sick?”
Accidental sysadmins land on Envoy because Istio, API gateways, and edge proxies already speak its stats. Then the volume fills, Postgres dies, and the listener still served 200s — no cluster counter matched host fill. A filling /var is a Tink warning; it is not an xDS job unless the proxy itself is the failure.
Tink is the other job: detect the issue on the machine, say why it happened in plain English, propose the command, and run it only after you approve. Keep Envoy if you already terminate traffic on the box. Use Tink if you run Linux servers and want a mechanic.
| Feature | Tink | Envoy |
|---|---|---|
| Setup time | 30 seconds (one curl | sh command) | Hours to days — bootstrap YAML, listeners, clusters, xDS, and still no host mechanic |
| What you get | Working monitoring, diagnosis, and approved fixes | L4/L7 proxying. Disk fill, SSH brute-force, and a quiet Postgres stay your problem until upstreams 503 |
| Pricing | Free (Scout) / $9 / $29 per machine per month | Open-source (Apache 2.0). You still pay the VPS, the control plane, and the person who reads admin /stats when /var fills |
| Hidden costs | None — fully managed | xDS drift, admin-port exposure, circuit-breaker tuning, and a second tool that pages you when memory climbs |
| Monitoring approach | Agent on the server — CPU, disk, services, logs, certs, ports | downstream_rq_total and cluster gauges. Envoy does not watch host fill or auth.log |
| Configuration | None after install — heuristics and AI | listeners, filters, clusters, endpoints, and which xDS snapshot actually loaded |
| Plain-English diagnosis | Yes — AI explains root cause, impact, and fix | You grep /stats for 503s, then SSH in to change the box |
| Fix execution | Proposes and executes approved commands with an audit trail | Proxy only — Envoy cannot free disk, restart Postgres, or fail2ban an attacking IP |
| Alerting | Built-in across 8 channels | Not an Envoy job — scrape stats or tail access logs before anyone is paged about the host |
| Predictive alerts | Yes — disk fills in ~6 days, memory and CPU trends | Never — Envoy answers connections after traffic already arrived. It does not forecast a quiet volume filling up |
| SSH brute-force detection | Built-in — parses auth.log every scan | Never — Envoy does not read auth.log, journald SSH, or host firewall state |
| Machine offline detection | Agent presence monitoring with multi-channel alerts | Silence if the process dies — unless an outside uptime check already watches the listener |
| Public status page | Shareable URL with 90-day history | None — Envoy has no customer-facing fleet status page |
| Weekly fleet digest | Automated Monday digest + daily brief when issues are open | None — a stats-sink counter is not a plain-English fleet narrative |
| On-call tracking | Built-in /oncall command + incident acknowledgment | Not included — wire Prometheus rules into PagerDuty or another incident tool |
| Conversation interface | Telegram, WhatsApp, web dashboard, CLI | envoy admin /stats. No mechanic you text when /var filled and clusters still looked healthy |
| Learning curve | None — works after install | Steep — bootstrap YAML, xDS, HCM filters, and which 503 actually means the box is sick |
| Best for | Freelancers, small teams, accidental sysadmins (1-50 Linux servers) | Teams that already run Envoy as a data plane and still need a separate mechanic for the Linux host |
When Envoy is the right choice
Keep running Envoy when you already want that exact job:
- A service-mesh data plane — you need xDS listeners and clusters, not a mechanic.
- L4/L7 edge or sidecar proxying — filters and circuit breakers matter more than fleet health scores.
- An existing scrape of /stats — you already graph downstream_rq_total, and someone owns the bootstrap YAML.
- Hosts that only page on HTTP — you already scrape Envoy metrics, not a sick-box SSH loop.
The real cost of “just run Envoy”
Envoy is a serious proxy. A working ops loop for five Linux boxes is not:
- A healthy cluster still means you SSH in and change the box by hand
- Host fill, Postgres, and SSH brute-force never appear unless something else watched those signals
- A filling /var is a Tink disk warning on every scan — Envoy will stay quiet until the proxy itself 503s
- A single VPS with a dead Envoy still needs a mechanic, not another bootstrap YAML
For a 5-server team, Tink Mechanic at $45/month is cheaper than Envoy plus the engineer who tails /stats after the disk is already full, and every scan includes a diagnosis a quiet 200 will not type.
No xDS homework. No silent host. One command install.
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