Assembled vs Sierra: who uses which
Customers, public proof and the companies that use both.
On usedby, 39 companies use Assembled and 50 use Sierra. 3 companies use both, including Ramp, CLEAR, and GoFundMe. Assembled leads among the Fintech & Payments companies on usedby that use either tool.Latest check Oct 8, 2026: 89 of 89 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 Assembled, Sierra, or both
Every company with a public proof for at least one of the two tools.
36
use only Assembled
3
companies use both
47
use only Sierra
36 companies use only Assembled, 47 use only Sierra and 3 use both, out of the 86 companies on usedby that use at least one of them.
Where it lands
Newest customers
No new customer since tracking started on October 8, 2026.
Where it lands
Newest customers
Who uses both
Companies with a confirmed or observed line on both tools.
| Company | First public proof, Sierra |
|---|---|
 Ramp | On or before Sep 2025 |
 CLEAR | On or before May 2025 |
 GoFundMe | On or before Apr 2026 |
By industry
Which tool the companies on usedby use, by industry. Shares of the companies on usedby that use Assembled, Sierra or both: a share of the companies on usedby, not of the market.
Assembled onlyBothSierra only
More common with Assembled
- Fintech & Payments6 of the 10 Fintech & Payments companies on usedby that use either tool use Assembled, 1 of them alongside Sierra.
- DevTools & Infrastructure3 of the 5 DevTools & Infrastructure companies on usedby that use either tool use Assembled.
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.
Assembled
SierraWhat customers report
Results as the vendor or the customer published them, with the source and the date.
Assembled
Through improved schedule adherence alone, NEXT Insurance has already saved $957K.
NEXT Insurance
Vendor case study, assembled.com, captured Oct 8, 2026
average handle time has dropped by 60%
Preply
Vendor case study, assembled.com, captured Oct 8, 2026
Sierra
Nearly 1,000 hours per month returned to exception handling and high-value work
RunBuggy
Vendor case study, sierra.ai, published Feb 3, 2026
Questions about Assembled and Sierra
Which is used more, Assembled or Sierra?
Sierra has more customers on usedby: 50 against 39 for Assembled.
Do companies use both Assembled and Sierra?
Yes. 3 companies use both on usedby, including Ramp, CLEAR, and GoFundMe.
Who uses Assembled?
39 companies on usedby, each with the public page that shows it. See who uses Assembled.
Who uses Sierra?
50 companies on usedby, each with the public page that shows it. See who uses Sierra.
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.