Fullstory vs Sigma: who uses which
Customers, public proof and the companies that use both.
On usedby, 35 companies use Fullstory and 56 use Sigma. 1 company uses both, including Duolingo. Fullstory leads among the Fintech & Payments companies on usedby that use either tool.Latest check Nov 13, 2026: 91 of 91 public lines checked. Counts include every proof level, job-post signals included. A company on both tools counts at any proof level, and a job post on one side is marked as such.
Who uses Fullstory, Sigma, or both
Every company with a public proof for at least one of the two tools.
34
listed for Fullstory only
1
company uses both
55
listed for Sigma only
On usedby, 34 companies are listed for Fullstory only, 55 are listed for Sigma only and 1 uses both, out of the 90 companies listed for at least one. An absent listing does not prove non-use.
Who uses both
Companies with a public line on both tools, at any proof level: the strongest proofs come first, and a job post is marked.
| Company |
|---|
 Duolingo |
By industry
Which tool the companies on usedby use, by industry. Shares of the companies on usedby that use Fullstory, Sigma or both: a share of the companies on usedby, not of the market.
Listed for Fullstory onlyBothListed for Sigma only
More common with Fullstory
- Fintech & Payments5 of the 6 Fintech & Payments companies on usedby that use either tool use Fullstory.
- Restaurants & Food Services4 of the 5 Restaurants & Food Services companies on usedby that use either tool use Fullstory.
Source: every usedby line, from confirmed proofs to job-post signals (the weakest proof level).
Side by side
Facts from our data and from each vendor's public pages. Each line says where it comes from.
Vendor facts checked: Fullstory, 0 of 5; Sigma, 2 of 5. Missing facts remain unverified, not absent features.
Fullstory
SigmaWhat customers report
Results as the vendor or the customer published them, with the source and the date.
Fullstory
No reviewed story for Fullstory yet.
Sigma
Within 90 days, 91% of eligible users actively adopted the platform.
Duolingo
Vendor case study, sigmacomputing.com, published Sep 9, 2025
there are more than 700 active Sigma users analyzing million to billion row datasets, globally
Blackstone
Vendor case study, sigmacomputing.com, published Jul 10, 2023
Questions about Fullstory and Sigma
Which is used more, Fullstory or Sigma?
Sigma has more customers on usedby: 56 against 35 for Fullstory.
Do companies use both Fullstory and Sigma?
Yes. 1 company uses both on usedby, including Duolingo.
Who uses Fullstory?
35 companies on usedby, each with the public page that shows it. See who uses Fullstory.
Who uses Sigma?
56 companies on usedby, each with the public page that shows it. See who uses Sigma.
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 four proof levels: confirmed, declared by the company itself, observed or signal (a job post, the weakest). A company counts as using both tools when it has a line on each, at any level; the list shows the strongest proofs first and marks job posts.