LlamaIndex vs Within (formerly Klarity): who uses which
Customers, public proof and the companies that use both.
On usedby, 48 companies use LlamaIndex and 16 use Within (formerly Klarity). No company is listed with both yet. LlamaIndex leads among the Artificial Intelligence companies on usedby that use either tool.Latest check Oct 8, 2026: 64 of 64 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 LlamaIndex, Within (formerly Klarity), or both
Every company with a public proof for at least one of the two tools.
48
use only LlamaIndex
0
companies use both
16
use only Within (formerly Klarity)
48 companies use only LlamaIndex, 16 use only Within (formerly Klarity) and 0 use both, out of the 64 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 8, 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.
LlamaIndex
Within (formerly Klarity)What customers report
Results as the vendor or the customer published them, with the source and the date.
LlamaIndex
Lyzr's annual recurring revenue jumped from around $100,000 to about $1.5 million in less than 60 days.
Lyzr AI
Vendor case study, llamaindex.ai, captured Oct 7, 2026
20% increase in digital lead to sales conversion
GymNation
Vendor case study, llamaindex.ai, captured Oct 7, 2026
Within (formerly Klarity)
With Within, Accelirate cut PDD creation time by 67% for simple workflows
Accelirate
Vendor case study, within.ai, captured Oct 8, 2026
3,800+ processes documented and analyzed across entire accounting organization
Doordash
Vendor case study, within.ai, captured Oct 8, 2026
Questions about LlamaIndex and Within (formerly Klarity)
Which is used more, LlamaIndex or Within (formerly Klarity)?
LlamaIndex has more customers on usedby: 48 against 16 for Within (formerly Klarity).
Do companies use both LlamaIndex and Within (formerly Klarity)?
usedby has not found a company with a confirmed or observed line on both LlamaIndex and Within (formerly Klarity) yet.
Who uses LlamaIndex?
48 companies on usedby, each with the public page that shows it. See who uses LlamaIndex.
Who uses Within (formerly Klarity)?
16 companies on usedby, each with the public page that shows it. See who uses Within (formerly Klarity).
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.