Shares Dropbox's exact profile: one-way backup to object storage is a genuine weekend build, real bi-directional sync with conflict resolution across devices is a much deeper problem than the score suggests.
VIBE SCORE 91/100
The parts this build actually needs, each rated on its own — the average is the Vibe Score above.
| File uploads | 87 |
| User login | 92 |
| CRUD database | 95 |
Two real costs, not just "free": the AI agent's own usage, and hosting once it's running. Both are estimated from this app's own effort rating and component list — see the assumptions on the method page.
| AI agent — with a subscription (Claude Pro/Max, Cursor, etc.) | $0 marginal |
| AI agent — pay-per-use API, no subscription | $43–$86 one-time |
| Hosting, once it's running | $0/mo (free tier) |
| Domain name, if you want your own | ~$12/yr |
Box costs $20/mo. Even paying per-token with no subscription, and accounting for hosting, this build pays for itself in about 5 months.
Don't feel like building it? These are already made, open-source, and free.
Borderline. Shares Dropbox's exact profile: one-way backup to object storage is a genuine weekend build, real bi-directional sync with conflict resolution across devices is a much deeper problem than the score suggests.
Box costs $20/mo (about $240/yr) as of 2026-08. That's what a working rebuild would save you.
True two-way sync with conflict resolution across multiple devices editing offline is a distributed-systems problem, not a CRUD feature Enterprise access controls (folder-level permissions across an org) are real, deep governance features Their compliance certifications (relevant if you handle regulated data) aren't something a personal build inherits
Yes — Nextcloud, Syncthing are open-source options worth trying before you build your own. Details are in the standard parts section on this page.