Comet Opik vs LangSmith: who uses which
Customers, public proof and the companies that use both.
On usedby, 17 companies use Comet Opik and 43 use LangSmith. 2 companies use both, including Uber and Autodesk. LangSmith leads among the HR & Recruiting companies on usedby that use either tool.Latest check Oct 7, 2026: 54 of 60 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 Comet Opik, LangSmith, or both
Every company with a public proof for at least one of the two tools.
15
use only Comet Opik
2
companies use both
41
use only LangSmith
15 companies use only Comet Opik, 41 use only LangSmith and 2 use both, out of the 58 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 3, 2026.
Who uses both
Companies with a confirmed or observed line on both tools.
| Company |
|---|
 Uber |
 Autodesk |
Side by side
Facts from our data and from each vendor's public pages. Each line says where it comes from.
Comet Opik
LangSmithWhat customers report
Results as the vendor or the customer published them, with the source and the date.
Comet Opik
LangSmith
No reviewed story for LangSmith yet.
Questions about Comet Opik and LangSmith
Which is used more, Comet Opik or LangSmith?
LangSmith has more customers on usedby: 43 against 17 for Comet Opik.
Do companies use both Comet Opik and LangSmith?
Yes. 2 companies use both on usedby, including Uber and Autodesk.
Who uses Comet Opik?
17 companies on usedby, each with the public page that shows it. See who uses Comet Opik.
Who uses LangSmith?
43 companies on usedby, each with the public page that shows it. See who uses LangSmith.
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.