# Grammarly: Critical incident: Increased latency across Grammarly product offerings

**Summary:** Grammarly reported a critical degradation causing intermittent or slow features, login trouble, and “Service unavailable” errors from 2026-03-09 16:52 UTC to 2026-03-09 20:07 UTC, lasting 3 h 14 min. A fix implemented at 19:15 UTC restored login and use of Grammarly and Superhuman; the incident was resolved. _(machine-written, sol)_
- Kind: Major incident · Label: degradation (model (Jev))
- Changed: 2026-03-09 16:52 UTC · Detected: 2026-10-17 18:22 UTC
- [Source: https://stspg.io/d2rvm0rd5pvl](https://stspg.io/d2rvm0rd5pvl)
- [Company: Grammarly](https://rewindex.com/company/grammarly.md)
- Versions: before (none: first archived) → after incident\_version:21/jlpbxtnx4nwf@6df9fb9e5660
- Change 1 of 1 for this incident

## What changed

**1. Added: Title**

```diff
+ Increased latency across Grammarly product offerings
```

**2. Added: Impact**

```diff
+ critical
```

**3. Added: Status**

```diff
+ resolved
```

**4. Added: Start time**

```diff
+ 2026-03-09 16:52 UTC
```

**5. Added: Resolved time**

```diff
+ 2026-03-09 20:07 UTC
```

**6. Added: Affected components**

```diff
+ Generative AI assistance, Grammarly Editor, Grammarly for Android, Grammarly for iPad, Grammarly for iPhone, Grammarly for Mac, Grammarly for Microsoft Office, Grammarly for Microsoft Word on Mac, Grammarly for Windows, Grammarly's Browser Extension, Login, Plagiarism Detection, Writing Suggestions
```

**7. Added: Update** (investigating) · 2026-03-09 16:52 UTC

```diff
+ We are currently investigating an issue causing Grammarly's product offerings and features to work intermittently or slower than usual. We will update you as soon as we have more information. Thank you for your patience!
```

**8. Added: Update** (investigating) · 2026-03-09 17:21 UTC

```diff
+ We're continuing to investigate this issue. Some Grammarly users may have trouble logging in or see "Service unavailable" when trying to use Grammarly.
```

**9. Added: Update** (investigating) · 2026-03-09 18:53 UTC

```diff
+ We're still looking into this issue. We'll provide an update as soon as we can.
```

**10. Added: Update** (monitoring) · 2026-03-09 19:15 UTC

```diff
+ We've implemented a fix, so you should be able to log in and use Grammarly and Superhuman. We're monitoring the results of this fix and will provide further updates.
```

**11. Added: Update** (resolved) · 2026-03-09 20:07 UTC

```diff
+ This issue has been resolved.
```

## History of this incident

| When (UTC) | Change | Label |
| --- | --- | --- |
| 2026-03-09 16:52 UTC | Critical incident: Increased latency across Grammarly product offerings (this change) | degradation |

All Grammarly changes: [timeline](https://rewindex.com/company/grammarly/changes.md)
_Diff excerpts are shown on normalized text: dates, counters and tokens appear as ‹date›, ‹count›, ‹tok›; noise-only edits are hidden. Rewindex shows the changed passages, not a copy of the page._


---
Canonical: https://rewindex.com/change/ie4e0741a649152 · Markdown: https://rewindex.com/change/ie4e0741a649152.md · JSON: https://rewindex.com/api/v1/changes/ie4e0741a649152 · Generated 2026-10-18T02:28:23.552Z