Unison reconciles replicas, profiles, and archives. That is not a mechanic. Tink installs in one command, watches the Linux host, explains what is wrong, and helps you fix it.
Accidental sysadmins land on Unison because two-way rsync looks cheaper than a NAS. Then the host volume fills, nginx dies, and the archive still agrees — no path match for host fill. A filling /var is a Tink warning; it is not a Unison job unless you scraped the last exit code and watched it.
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 using Unison if you already run replicas. Use Tink if you run Linux servers and want a mechanic.
| Feature | Tink | Unison |
|---|---|---|
| Setup time | 30 seconds (one curl | sh command) | Hours — ~/.unison/*.prf, root paths, ignore patterns, SSH transport, archive files, then a host that still has no mechanic after the last replica stays equal |
| What you get | Working monitoring, diagnosis, and approved fixes | Bidirectional file sync, profiles, and a GTK/CLI replica view. Disk fill, nginx, Postgres, and certs stay your problem until you SSH past unison -batch |
| Pricing | Free (Scout) / $9 / $29 per machine per month | GPL and free. You still pay the person who owns the VPS after the last archive agrees |
| Hidden costs | None — fully managed | A quiet replica at 2am, skipped conflicts that are not host fill, and a second tool to tell you the box is sick while Unison still shows nothing to propagate |
| Monitoring approach | Agent on the server — CPU, disk, services, logs, certs, ports | Roots, archives, and path diffs. Unison does not watch a quiet cert or host auth.log after the last replica finished |
| Configuration | None after install — heuristics and AI | profile.prf, root=, ignore=, sshargs, unison.service, and which skipped conflict actually pages you |
| Plain-English diagnosis | Yes — AI explains root cause, impact, and fix | You read the replica diff, then SSH into the host to change the Linux box Unison already sits on |
| Fix execution | Proposes and executes approved commands with an audit trail | unison -batch and unison-gtk — Unison cannot free host disk, rotate a cert, or stop SSH brute-force unless you wrote that task |
| Alerting | Built-in across 8 channels | Not a Unison job — exit codes plus a separate monitoring tool have to fire |
| Predictive alerts | Yes — disk fills in ~6 days, memory and CPU trends | Not a Unison job — an equal replica pair does not forecast a quiet host filling up |
| SSH brute-force detection | Built-in — parses auth.log every scan | Never — Unison does not read host auth.log, journald, or firewall state after the last replica synced |
| Machine offline detection | Agent presence monitoring with multi-channel alerts | Silence if unison dies after the last cron run — unless you built a separate uptime check |
| Public status page | Shareable URL with 90-day history | None — Unison has no customer-facing status page for the Linux host |
| Weekly fleet digest | Automated Monday digest + daily brief when issues are open | None — a replica completion recap is not a plain-English fleet narrative |
| On-call tracking | Built-in /oncall command + incident acknowledgment | Not included — wire failed unison into PagerDuty or another incident tool |
| Conversation interface | Telegram, WhatsApp, web dashboard, CLI | unison-gtk and SSH. No mechanic you text when /var filled and the last archive still agreed |
| Learning curve | None — works after install | Steep — profiles, archives, ignore regexes, SSH roots, and which failure is Unison vs the running host |
| Best for | Freelancers, small teams, accidental sysadmins (1-50 Linux servers) | Teams that already run Unison for two-way replicas, not a sick-VPS mechanic |
Keep using Unison when you already want that exact job:
Unison runs replicas and profiles. A working ops loop for five Linux boxes is not:
For a 5-server team, Tink Mechanic at $45/month is cheaper than the engineer who keeps failed-app notifications alive after a free Unison install, and every scan includes a diagnosis a quiet replica poll will not type.
No ~/.unison homework. No silent host. One command install.
Start MechanicAlso compare: Tink vs Syncthing · Tink vs Seafile · Tink vs MinIO