SiteBlocker vs StayFocusd
Two ways to block distracting sites, compared honestly. The classic free Chrome time-limiter with a hard “Nuclear Option”.
SiteBlocker gives every blocking feature away free (with Pro at $49.99 once for keyword blocking and full insights) and collects zero data. StayFocusd is a long-running, free Chrome blocker built around time limits rather than outright blocks. It’s now published by Sensor Tower, a mobile-analytics company.
Feature comparison
| Feature | SiteBlocker | StayFocusd |
|---|---|---|
| Price | Free; Pro $49.99 once | Free |
| Scheduled blocking | Free | Yes |
| Time limits per site | Pro (daily budgets) | Yes |
| Whitelist mode | Free | No |
| Section blocking (Shorts, Reels, feeds) | Free | Hides in-page elements only |
| Focus Mode + Pomodoro | Free | Nuclear Option (timed lock) |
| Keyword blocking | Pro | In-page content only |
| Cross-device sync | Free | Limited |
| Insights dashboard | Yes (full on Pro) | Basic stats |
| Browsers | Chrome, Firefox | Chrome, Edge |
| Privacy | Zero data collection | Owned by Sensor Tower |
What StayFocusd does well
- + Strong anti-bypass design: the Nuclear Option and Require Challenge are hard to wriggle out of
- + Granular in-page blocking, including hiding comments, which SiteBlocker does not do
- + Free, with a large and loyal user base
Where StayFocusd falls short
- Chrome and Edge only, with no Firefox or Safari version
- No real cross-device sync and no insights dashboard
- Now owned by an analytics company, which gives privacy-minded users pause
SiteBlocker is best for…
You want Firefox support, cross-device sync, a real insights dashboard, and a privacy-first owner.
StayFocusd is best for…
You’re a Chrome-only user who wants per-site time limits and a hard nuclear lock, for free.
Try SiteBlocker free. You can keep your current blocker installed while you test it.
Already decided? See how to switch from StayFocusd.
SiteBlocker vs StayFocusd: FAQ
Is SiteBlocker a StayFocusd alternative for Firefox?
Yes. StayFocusd is Chrome and Edge only, while SiteBlocker works on both Chrome and Firefox with the same features and cross-device sync. If you use Firefox, SiteBlocker is a direct replacement.
How is SiteBlocker different from StayFocusd?
SiteBlocker adds cross-device sync, a full insights dashboard, and a Focus Mode with a Pomodoro timer, none of which StayFocusd offers. StayFocusd’s strengths are per-site time limits and its hard Nuclear Option.
Is SiteBlocker more private than StayFocusd?
SiteBlocker collects zero data by default. StayFocusd is now published by Sensor Tower, a mobile-analytics company, which some privacy-minded users prefer to avoid despite its no-collection claim.
Does SiteBlocker have a Nuclear Option like StayFocusd?
SiteBlocker’s hard Focus Mode is the closest equivalent: it blocks your selected sites for the session regardless of schedule. StayFocusd’s Nuclear Option is a dedicated irreversible timed lock.
Last updated August 26, 2026
Competitor pricing and features are verified periodically and can change. Sources:
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