SiteBlocker vs BlockSite
Two ways to block distracting sites, compared honestly. The mass-market site and app blocker, with the category’s biggest install base.
SiteBlocker gives every blocking feature away free (with Pro from $2.99/mo for keyword blocking and full insights) and collects zero data. BlockSite is the name most people find first: a polished blocker spanning the browser, mobile, and desktop, pitched at both focus and parental control. It has reshaped its pricing to compete on value, so the real catches now are the 3-site free tier and its data-collection history.
Feature comparison
| Feature | SiteBlocker | BlockSite |
|---|---|---|
| Price | Free; Pro $2.99/mo · $24.99/yr · $49.99 lifetime | $14.99/mo · $29.99/yr · $49.99 lifetime |
| Free blocked-site limit | Unlimited | 3 sites |
| Scheduled blocking | Free | Paid |
| Whitelist mode | Free | Paid |
| Focus Mode + Pomodoro | Free | Limited |
| Keyword blocking | Pro | Paid |
| Cross-device sync | Free | Paid |
| Data collection | None | Collects user data |
| Browsers | Chrome, Firefox | Chrome, Edge, Firefox |
| Mobile apps | No | iOS, Android |
What BlockSite does well
- + The easiest onboarding in the category and the largest, most-tested user base
- + Keyword and category blocking, plus a genuine mobile and parental-control story
- + Custom block pages and redirects
Where BlockSite falls short
- – The free tier caps you at 3 sites, barely enough for one bad habit
- – A documented history of collecting browsing data: in 2018 it was among the extensions AdGuard flagged for harvesting users’ full browsing history, pulled from the Chrome and Firefox stores, then later reinstated
- – A password doesn’t stop someone uninstalling the extension, so the lock is easy to bypass
- – Whitelist (allow-only) mode is awkward, pricing shifts with frequent promos, and the extension pushes persistent upgrade prompts
SiteBlocker is best for…
You want every blocking feature free with no site cap, you care about privacy, and you live in Chrome or Firefox.
BlockSite is best for…
You need to block apps on iOS or Android, or want parental controls across phones and tablets.
Try SiteBlocker free. You can keep your current blocker installed while you test it.
SiteBlocker vs BlockSite: FAQ
Is SiteBlocker a free alternative to BlockSite?
Yes. SiteBlocker’s blocking is completely free with no site limit, where BlockSite caps free users at 3 blocked sites. SiteBlocker’s optional Pro tier ($2.99/mo, $24.99/yr, or $49.99 lifetime) adds keyword blocking and a full insights dashboard, but every core blocking feature stays free.
How is SiteBlocker different from BlockSite?
SiteBlocker gives away scheduling, whitelist mode, Focus Mode, and cross-device sync for free and collects zero data. BlockSite paywalls those features and collects user data. BlockSite’s advantage is mobile apps for iOS and Android, which SiteBlocker does not offer.
Does SiteBlocker have a 3-site limit like BlockSite?
No. SiteBlocker lets you block an unlimited number of sites across unlimited blocklists for free. There is no cap on the free tier.
How do I switch from BlockSite to SiteBlocker?
Install SiteBlocker from the Chrome Web Store or Firefox Add-ons, copy the sites you block in BlockSite into a SiteBlocker blocklist, set up any schedules, then uninstall BlockSite. It takes about five minutes.
Last updated July 04, 2026
Competitor pricing and features are verified periodically and can change. Sources:
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