DeepL vs Grammarly: who uses which
Customers, public proof and the companies that use both.
On usedby, 47 companies use DeepL and 44 use Grammarly. No company is listed with both yet. Grammarly leads among the Marketing Tech companies on usedby that use either tool.Latest check Oct 7, 2026: 91 of 91 public lines checked. Counts include every proof level, job-post signals included. Companies named on both have a confirmed or observed line on each side.
Who uses DeepL, Grammarly, or both
Every company with a public proof for at least one of the two tools.
47
use only DeepL
0
companies use both
44
use only Grammarly
47 companies use only DeepL, 44 use only Grammarly and 0 use both, out of the 91 companies on usedby that use at least one of them.
Where it lands
Newest customers
No new customer since tracking started on October 7, 2026.
Where it lands
Newest customers
No new customer since tracking started on October 2, 2026.
Who uses both
Companies with a confirmed or observed line on both tools.
By industry
Which tool the companies on usedby use, by industry. Shares of the companies on usedby that use DeepL, Grammarly or both: a share of the companies on usedby, not of the market.
DeepL onlyBothGrammarly only
More common with Grammarly
- Marketing Tech4 of the 5 Marketing Tech companies on usedby that use either tool use Grammarly.
- Schools & Universities5 of the 5 Schools & Universities companies on usedby that use either tool use Grammarly.
Source: confirmed and observed usedby lines. Job-post signals, the weakest proof level, are left out of these shares.
Side by side
Facts from our data and from each vendor's public pages. Each line says where it comes from.
DeepLGrammarlyWhat customers report
Results as the vendor or the customer published them, with the source and the date.
DeepL
4x higher audience engagement. Subtitled videos are watched to completion four times more often.
SyncWords
Vendor case study, deepl.com, published Apr 4, 2025
SOMPO HD estimates that adoption of DeepL reduces translation outsourcing costs by several million yen annually
Sompo Holdings
Vendor case study, deepl.com, published May 20, 2026
Grammarly
No reviewed story for Grammarly yet.
Questions about DeepL and Grammarly
Which is used more, DeepL or Grammarly?
DeepL has more customers on usedby: 47 against 44 for Grammarly.
Do companies use both DeepL and Grammarly?
usedby has not found a company with a confirmed or observed line on both DeepL and Grammarly yet.
Who uses DeepL?
47 companies on usedby, each with the public page that shows it. See who uses DeepL.
Who uses Grammarly?
44 companies on usedby, each with the public page that shows it. See who uses Grammarly.
How does usedby count customers?
A company counts when a public page shows it: a vendor's customer page, a case study, a press release or a job post, most saved with a dated capture. Every line is a customer, at one of three proof levels: confirmed, observed or signal (a job post, the weakest). A company is named as using both tools when its lines on both are confirmed or observed.