Comparison · Data breach check
LeakCheck vs PassKnight
LeakCheck is ahead: 67 against 65 out of 100 for PassKnight. LeakCheck wins on popularity & trust, localization. PassKnight wins on price & free tier, safety & privacy, freshness. LeakCheck: Freemium. PassKnight: Free.
PassKnight is not listed in this language edition of the catalog; the comparison is shown for reference.
@LeakCheck1_Bot
Freemium
67/ 100
#1 in Data breach checkThe Telegram bot of LeakCheck.io, a commercial breach-data search company operating since 2018 — check your own email or phone for free against their database. Its parent company also sells broader paid lookups, so treat the free bot strictly as a self-check tool.
@PassKnightBot
Free
65/ 100
A Russian-language password checker: send it a password and it rates the strength, flags weak patterns like birthdays or keyboard walks, and checks it against 14+ billion breached passwords via k-Anonymity — the full password never leaves your device.
At a glance
| LeakCheck | PassKnight | |
|---|---|---|
| Pricing and limits | Freemium | Free |
| Languages | EN | RU |
| Inline mode | no | no |
| Mini App | no | no |
| Works in groups | no | no |
| Works in channels | no | no |
| Accepts voice | no | no |
| Accepts files | no | no |
| Requires phone number | no | no |
| Requires registration | no | no |
| Shows ads | no | no |
| Official | no | no |
| Developer | LeakCheck | Iskander |
| Last check | September 12, 2026 | September 12, 2026 |
Score by criterion
| Criterion | Weight | LeakCheck | PassKnight |
|---|---|---|---|
| Functionality | 25 | 7 | 7 |
| Reliability & speed | 15 | 6 | 6 |
| Popularity & trust | 15 | 5 | 3 |
| Price & free tier | 10 | 9 | 10 |
| Usability | 10 | 7 | 7 |
| Safety & privacy | 10 | 5 | 8 |
| Freshness | 5 | 5 | 8 |
| Localization | 5 | 10 | 2 |
| No intrusive ads | 5 | 9 | 9 |
| Total | 100 | 67 | 65 |
Pros and cons
LeakCheck
- Backed by a named, multi-year commercial company
- Free self-check for both email and phone
- Companion channel provides transparency on usage
- Parent company also sells broader paid lookup services
- Commercial breach-search companies operate in a legally grey area in some jurisdictions
PassKnight
- Named developer and public source code — unusually transparent for this category
- k-Anonymity design means the full password is never transmitted
- Actively maintained — code updated within the week before this review
- Free core functionality, Stars tip is optional
- Interface is Russian-only, no confirmed English toggle
- Very small project with limited track record and no press coverage found
- No formal privacy policy beyond the claims stated in the README
Frequently asked questions
LeakCheck or PassKnight: which is better?
LeakCheck is ahead: 67 against 65 out of 100 for PassKnight. LeakCheck wins on popularity & trust, localization. PassKnight wins on price & free tier, safety & privacy, freshness. LeakCheck: Freemium. PassKnight: Free.
Are LeakCheck and PassKnight free?
LeakCheck: Freemium. PassKnight: Free.
Do LeakCheck and PassKnight work in groups?
LeakCheck: no. PassKnight: no.