QuillBot vs Writesonic: Which Is More Trustworthy?
At a glance: verified facts
| Fact | QuillBot | Writesonic |
|---|---|---|
| Operated by | Learneo, Inc. | Writesonic, Inc. |
| Country | United States | United States |
| Founded | 2017 | 2020 |
| Founders public | Yes | Yes |
| Domain registered | — | 2021-01-14 |
| Official iOS app | ✓ Quillbot-AI Writing & Keyboard | — |
| Policy changes we track | 2 detected (2 major) | None detected |
| Last data check | 2026-08-01 | 2026-08-01 |
From public records (company registry, RDAP, App Store metadata) and our policy snapshots — a "—" means we have no verified data for that field yet.
What the evidence shows
Both are ai writing & paraphrasing tools we track. Comparing the 4 trust dimensions measured for both:
- On company & identity, the two are effectively tied (15/16 vs 18.5/20).
- On data & privacy, the two are effectively tied (7.5/10 vs 7.5/10).
- Writesonic leads on billing & subscription (8/8 vs 5.2/8).
- On community reputation, the two are effectively tied (7.5/7.5 vs 3.75/3.75).
Not yet measured for either tool: Product Reality — this comparison covers only what we verified.
Quick verdicts
QuillBot: QuillBot earns a grade A (84.8/100) on our evidence-based trust rubric, measured on 4 of 5 trust dimensions. It scores strongly on community reputation but only well on billing & subscription (5.2/8). We have not yet assessed product reality, so the grade is provisional.
Writesonic: Writesonic earns a grade A (90.4/100) on our evidence-based trust rubric, measured on 4 of 5 trust dimensions. It scores strongly on billing & subscription but only well on data & privacy (7.5/10). We have not yet assessed product reality, so the grade is provisional.
Trust score breakdown
| Dimension | QuillBot | Writesonic |
|---|---|---|
| Company & Identity | 15/16 | 18.5/20 |
| Data & Privacy | 7.5/10 | 7.5/10 |
| Billing & Subscription | 5.2/8 | 8/8 |
| Product Reality | — | — |
| Community Reputation | 7.5/7.5 | 3.75/3.75 |
| Total | 84.8/100 | 90.4/100 |
What their privacy policies say about AI training
QuillBot (policy captured 2026-06-18):
We may use such aggregated,
de-identified or anonymized data within Learneo and share it with third parties for our lawful business
purposes, including to analyze, build and improve the Services and promote our business, provided that we will not
share such data in a manner that could identify you.
Writesonic (policy captured 2026-06-11):
ProviderTraining on customer dataDefault retentionConfiguration we useOpenAI (direct API)Not used to train OpenAI models.
Quoted verbatim from each vendor's own privacy policy — full context and more excerpts on each tool's report page.
Frequently asked questions
Is QuillBot more trustworthy than Writesonic?
Writesonic currently scores higher — 90/100 vs 85/100 — across the 4 trust dimensions measured for both. That covers documented evidence only, not features or pricing.
Is QuillBot legit?
QuillBot currently holds trust grade A (85/100) based on 4 of 5 trust dimensions, and is operated by Learneo, Inc.. The grade reflects only what we have measured; anything not yet assessed is marked as pending on the full report.
Is Writesonic legit?
Writesonic currently holds trust grade A (90/100) based on 4 of 5 trust dimensions, and is operated by Writesonic, Inc.. The grade reflects only what we have measured; anything not yet assessed is marked as pending on the full report.
More AI Writing & Paraphrasing comparisons
How this comparison works
Both tools are scored with the same five-dimension, 100-point rubric — company identity, data privacy, billing, product reality and reputation — using documented evidence only; a dimension with no evidence stays unscored instead of guessed. Read the full reports: QuillBot trust report · Writesonic trust report, or run any other tool through the trust check.