Comparison · Spell checking
ProWritingAid vs GrammarNaziBot
ProWritingAid (@ProWritingAidBot) is the better pick for anyone polishing an English text before it goes out, such as a cover letter, a post or documentation. You paste a paragraph and get it back with grammar and spelling fixed, plus flags on passive voice, repetition and overlong sentences; its ownership is not publicly confirmed, so keep confidential text out. GrammarNaziBot (@GrammarNaziBot) does a narrower job: it sits in a group, replies with the corrected spelling without explaining the rule, and reacts to every message. Choose GrammarNaziBot when a group has agreed it wants its own typos corrected as they happen.
@ProWritingAidBot
Free
76/ 100
#1 in Spell checkingChecks grammar, spelling and style in English and answers with the corrected text. Built around the ProWritingAid engine, it goes further than a speller - it flags wordy, repetitive and passive sentences.
@GrammarNaziBot
Free
74/ 100
Sits in a group chat and corrects spelling as people type — the running joke that also quietly improves the chat. Free.
By the numbers
ProWritingAid is ahead: 76 against 74 out of 100 for GrammarNaziBot. ProWritingAid wins on functionality, usability, freshness. GrammarNaziBot wins on reliability & speed, popularity & trust, price & free tier, safety & privacy. Both are free to use.
At a glance
| ProWritingAid | GrammarNaziBot | |
|---|---|---|
| Pricing and limits | Free | Free |
| Languages | EN | EN |
| Inline mode | no | no |
| Mini App | no | no |
| Works in groups | no | yes |
| 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 |
| Last check | October 22, 2026 | October 22, 2026 |
Score by criterion
| Criterion | Weight | ProWritingAid | GrammarNaziBot |
|---|---|---|---|
| Functionality | 25 | 8 | 6 |
| Reliability & speed | 15 | 6 | 7 |
| Popularity & trust | 15 | 6 | 7 |
| Price & free tier | 10 | 9 | 10 |
| Usability | 10 | 9 | 8 |
| Safety & privacy | 10 | 6 | 7 |
| Freshness | 5 | 7 | 5 |
| Localization | 5 | 10 | 10 |
| No intrusive ads | 5 | 10 | 10 |
| Total | 100 | 76 | 74 |
Pros and cons
ProWritingAid
- Catches style, not only mistakes
- Returns text you can copy straight back
- No account to set up
- English only
- Ownership is not publicly confirmed, so keep confidential text out
GrammarNaziBot
- Works where the typos actually happen
- Nothing to configure
- Free
- Reacts to every message, which annoys larger chats
- Correction only, no explanation of the rule
Frequently asked questions
ProWritingAid or GrammarNaziBot: which is better?
ProWritingAid is ahead: 76 against 74 out of 100 for GrammarNaziBot. ProWritingAid wins on functionality, usability, freshness. GrammarNaziBot wins on reliability & speed, popularity & trust, price & free tier, safety & privacy. Both are free to use.
Are ProWritingAid and GrammarNaziBot free?
ProWritingAid: Free. GrammarNaziBot: Free.
Do ProWritingAid and GrammarNaziBot work in groups?
ProWritingAid: no. GrammarNaziBot: yes.