Fireflies vs Grain: who uses which
Customers, public proof and the companies that use both.
On usedby, 24 companies use Fireflies and 30 use Grain. No company is listed with both yet. Fireflies leads among the DevTools & Infrastructure companies on usedby that use either tool, Grain among the Marketing Tech companies.Latest check Oct 7, 2026: 45 of 54 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 Fireflies, Grain, or both
Every company with a public proof for at least one of the two tools.
24
use only Fireflies
0
companies use both
30
use only Grain
24 companies use only Fireflies, 30 use only Grain and 0 use both, out of the 54 companies on usedby that use at least one of them.
Where it lands
Newest customers
No new customer since tracking started on October 2, 2026.
Where it lands
Newest customers
No new customer since tracking started on October 7, 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 Fireflies, Grain or both: a share of the companies on usedby, not of the market.
Fireflies onlyBothGrain only
More common with Fireflies
- DevTools & Infrastructure3 of the 5 DevTools & Infrastructure companies on usedby that use either tool use Fireflies.
More common with Grain
- Marketing Tech5 of the 6 Marketing Tech companies on usedby that use either tool use Grain.
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.
FirefliesGrainWhat customers report
Results as the vendor or the customer published them, with the source and the date.
Questions about Fireflies and Grain
Which is used more, Fireflies or Grain?
Grain has more customers on usedby: 30 against 24 for Fireflies. Fireflies leads among the DevTools & Infrastructure companies on usedby that use either tool, Grain among the Marketing Tech companies.
Do companies use both Fireflies and Grain?
usedby has not found a company with a confirmed or observed line on both Fireflies and Grain yet.
Who uses Fireflies?
24 companies on usedby, each with the public page that shows it. See who uses Fireflies.
Who uses Grain?
30 companies on usedby, each with the public page that shows it. See who uses Grain.
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.