E2B vs LangSmith: who uses which
Customers, public proof and the companies that use both.
On usedby, 23 companies use E2B and 43 use LangSmith. 1 company uses both, including Vanta. E2B leads among the Artificial Intelligence companies on usedby that use either tool, LangSmith among the HR & Recruiting companies.Latest check Oct 6, 2026: 60 of 66 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 E2B, LangSmith, or both
Every company with a public proof for at least one of the two tools.
22
use only E2B
1
company uses both
42
use only LangSmith
22 companies use only E2B, 42 use only LangSmith and 1 uses both, out of the 65 companies on usedby that use at least one of them.
Where it lands
Newest customers
We have not started tracking changes for E2B yet.
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 |
|---|
 Vanta |
By industry
Which tool the companies on usedby use, by industry. Shares of the companies on usedby that use E2B, LangSmith or both: a share of the companies on usedby, not of the market.
E2B onlyBothLangSmith only
More common with E2B
- Artificial Intelligence4 of the 5 Artificial Intelligence companies on usedby that use either tool use E2B.
More common with LangSmith
- HR & Recruiting5 of the 5 HR & Recruiting companies on usedby that use either tool use LangSmith.
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.
E2BLangSmithWhat customers report
Results as the vendor or the customer published them, with the source and the date.
E2B
we had over 50,000 users who started over 230,000 E2B sandboxes
LMArena
Vendor case study, e2b.dev, published Feb 3, 2025
from zero to $250M ARR in 12 months
Genspark
Vendor case study, e2b.dev, published May 7, 2026
LangSmith
No reviewed story for LangSmith yet.
Questions about E2B and LangSmith
Which is used more, E2B or LangSmith?
LangSmith has more customers on usedby: 43 against 23 for E2B. E2B leads among the Artificial Intelligence companies on usedby that use either tool, LangSmith among the HR & Recruiting companies.
Do companies use both E2B and LangSmith?
Yes. 1 company uses both on usedby, including Vanta.
Who uses E2B?
23 companies on usedby, each with the public page that shows it. See who uses E2B.
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.