Cognigy vs Sierra: who uses which
Customers, public proof and the companies that use both.
On usedby, 58 companies use Cognigy and 50 use Sierra. No company is listed with both yet. Cognigy leads among the Telecommunications companies on usedby that use either tool, Sierra among the Fintech & Payments companies.Latest check Oct 8, 2026: 105 of 108 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 Cognigy, Sierra, or both
Every company with a public proof for at least one of the two tools.
58
use only Cognigy
0
companies use both
50
use only Sierra
58 companies use only Cognigy, 50 use only Sierra and 0 use both, out of the 108 companies on usedby that use at least one of them.
Where it lands
Newest customers
Where it lands
Newest customers
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 Cognigy, Sierra or both: a share of the companies on usedby, not of the market.
Cognigy onlyBothSierra only
More common with Cognigy
- Telecommunications5 of the 8 Telecommunications companies on usedby that use either tool use Cognigy.
- Airlines & Aviation Services4 of the 5 Airlines & Aviation Services companies on usedby that use either tool use Cognigy.
- Automotive Manufacturing4 of the 5 Automotive Manufacturing companies on usedby that use either tool use Cognigy.
More common with Sierra
- Fintech & Payments5 of the 5 Fintech & Payments companies on usedby that use either tool use Sierra.
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.
CognigySierraWhat customers report
Results as the vendor or the customer published them, with the source and the date.
Cognigy
80% cost reduction from handled queries
Lippert
Vendor case study, cognigy.com, captured Oct 8, 2026
30 seconds saved per call
Mister Spex
Vendor case study, cognigy.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 Cognigy and Sierra
Which is used more, Cognigy or Sierra?
Cognigy has more customers on usedby: 58 against 50 for Sierra. Cognigy leads among the Telecommunications companies on usedby that use either tool, Sierra among the Fintech & Payments companies.
Do companies use both Cognigy and Sierra?
usedby has not found a company with a confirmed or observed line on both Cognigy and Sierra yet.
Who uses Cognigy?
58 companies on usedby, each with the public page that shows it. See who uses Cognigy.
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.