Tink vs Vault
Vault is HashiCorp secrets management. It also exposes unseal state, token counts, and audit gauges for Prometheus. That is not a mechanic. Tink installs in one command, watches the Linux server, explains what is wrong, and helps you fix it.
Vault watches secrets. Tink answers “why is this VPS sick?”
Accidental sysadmins land on Vault because every HashiCorp diagram includes telemetry. Then the volume fills, nginx dies, and vault_core_unsealed still reads 1 — no scrape matched host fill. A filling /var is a Tink warning; it is not a Vault job unless you wrote that PromQL yourself.
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 running Vault if you already operate secrets. Use Tink if you run Linux servers and want a mechanic.
| Feature | Tink | Vault |
|---|---|---|
| Setup time | 30 seconds (one curl | sh command) | Hours — Vault servers, unseal keys, storage backend, audit devices, telemetry stanza, and prometheus.yml scrape |
| What you get | Working monitoring, diagnosis, and approved fixes | A secrets scrape target. Host disk fill, nginx, Postgres, and certs stay your problem until PromQL fires and you SSH in |
| Pricing | Free (Scout) / $9 / $29 per machine per month | Vault OSS is free. Vault Enterprise is paid. You still pay Prometheus, Grafana, and the engineer who owns unseal and audit |
| Hidden costs | None — fully managed | A sealed node, Raft/storage loss, audit-log volume, an exposed :8200, and a second tool to tell you the box is sick |
| Monitoring approach | Agent on the server — CPU, disk, services, logs, certs, ports | vault_core, token, lease, and audit gauges. Vault does not watch a quiet cert unless you wrote that scrape |
| Configuration | None after install — heuristics and AI | storage, seal, listener, audit, telemetry prometheus, and which PromQL actually pages you |
| Plain-English diagnosis | Yes — AI explains root cause, impact, and fix | You graph vault_core_unsealed in Grafana, then SSH in to change the box |
| Fix execution | Proposes and executes approved commands with an audit trail | Telemetry only — Vault cannot free disk, restart nginx, or rotate a host cert |
| Alerting | Built-in across 8 channels | Not a Vault job — Prometheus rules and Alertmanager have to fire |
| Predictive alerts | Yes — disk fills in ~6 days, memory and CPU trends | Not a Vault job — an unseal gauge does not forecast a quiet volume filling up |
| SSH brute-force detection | Built-in — parses auth.log every scan | Never — Vault does not read auth.log, journald, or host firewall state |
| Machine offline detection | Agent presence monitoring with multi-channel alerts | Silence if the Vault process dies — unless you built an up{job="vault"} deadman check |
| Public status page | Shareable URL with 90-day history | None — Vault has no customer-facing status page |
| Weekly fleet digest | Automated Monday digest + daily brief when issues are open | None — a Vault telemetry scrape is not a plain-English fleet narrative |
| On-call tracking | Built-in /oncall command + incident acknowledgment | Not included — wire Alertmanager into PagerDuty or another incident tool |
| Conversation interface | Telegram, WhatsApp, web dashboard, CLI | vault status and Grafana. No mechanic you text when /var filled and Vault still showed unsealed |
| Learning curve | None — works after install | Steep — unseal, storage backends, audit devices, telemetry, PromQL, and which seal event actually pages |
| Best for | Freelancers, small teams, accidental sysadmins (1-50 Linux servers) | Teams that already run Vault and need secrets scrapes, not a sick-VPS mechanic |
When Vault telemetry is the right choice
Keep running Vault when you already want that exact job:
- Secrets and unseal — you need tokens, leases, and a seal, not a mechanic.
- An existing Vault cluster — storage, audit devices, and unseal keys matter more than host nginx, certs, and SSH on a quiet VPS.
- Policy-driven access — a sealed node should block secrets, not explain why /var filled.
- Hosts that only page on Vault PromQL — you already wrote the scrapes, not a sick-box SSH loop.
The real cost of “just scrape Vault”
Vault is in every secrets diagram. A working ops loop for five Linux boxes is not:
- An unsealed node still means you SSH in and change the box by hand
- Host fill, nginx, certs, and SSH brute-force never appear unless you wrote those scrapes
- A filling /var is a Tink disk warning on every scan — Vault will stay quiet until a telemetry rule fires
- A single VPS with a sealed Vault process still needs a mechanic, not another scrape
For a 5-server team, Tink Mechanic at $45/month is cheaper than Vault plus the engineer who keeps unseal, storage, and audit alive, and every scan includes a diagnosis a quiet telemetry scrape will not type.
No unseal homework. No silent host. One command install.
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