LangSmith vs Portkey: who uses which
Customers, public proof and the companies that use both.
On usedby, 43 companies use LangSmith and 22 use Portkey. No company is listed with both yet. LangSmith leads among the HR & Recruiting companies on usedby that use either tool.Latest check Oct 6, 2026: 59 of 65 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 LangSmith, Portkey, or both
Every company with a public proof for at least one of the two tools.
43
use only LangSmith
0
companies use both
22
use only Portkey
43 companies use only LangSmith, 22 use only Portkey and 0 use both, out of the 65 companies on usedby that use at least one of them.
Where it lands
Newest customers
No new customer since tracking started on October 3, 2026.
Where it lands
Newest customers
No new customer since tracking started on October 5, 2026.
Who uses both
Companies with a confirmed or observed line on both tools.
Side by side
Facts from our data and from each vendor's public pages. Each line says where it comes from.
LangSmith
PortkeyWhat customers report
Results as the vendor or the customer published them, with the source and the date.
LangSmith
No reviewed story for LangSmith yet.
Portkey
2x faster issue detection in development
Snorkel AI
Vendor case study, portkey.ai, captured Oct 5, 2026
How Fontys ICT uses Portkey
Fontys ICT
Vendor case study, portkey.ai, captured Oct 5, 2026
Questions about LangSmith and Portkey
Which is used more, LangSmith or Portkey?
LangSmith has more customers on usedby: 43 against 22 for Portkey.
Do companies use both LangSmith and Portkey?
usedby has not found a company with a confirmed or observed line on both LangSmith and Portkey yet.
Who uses LangSmith?
43 companies on usedby, each with the public page that shows it. See who uses LangSmith.
Who uses Portkey?
22 companies on usedby, each with the public page that shows it. See who uses Portkey.
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.