On usedby, 20 companies use Rillet and 26 use Tabs. 1 company uses both, including LangChain.Latest check Oct 8, 2026: 46 of 46 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 Rillet, Tabs, or both
Every company with a public proof for at least one of the two tools.
19
use only Rillet
1
company uses both
25
use only Tabs
19 companies use only Rillet, 25 use only Tabs and 1 uses both, out of the 45 companies on usedby that use at least one of them.
Where it lands
Newest customers
No new customer since tracking started on October 8, 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.
| Company |
|---|
 LangChain |
Side by side
Facts from our data and from each vendor's public pages. Each line says where it comes from.
Rillet
TabsWhat customers report
Results as the vendor or the customer published them, with the source and the date.
Rillet
Postscript's close is now consistently 3 days.
Postscript
Vendor case study, rillet.com, captured Oct 8, 2026
Tabs
36% faster time to payment, reduced from 72 to 46 days
Oscilar
Vendor case study, tabs.com, captured Oct 8, 2026
10 hours saved per month across billing, accounting, and collections workflows
Tavily
Vendor case study, tabs.com, captured Oct 8, 2026
Questions about Rillet and Tabs
Which is used more, Rillet or Tabs?
Tabs has more customers on usedby: 26 against 20 for Rillet.
Do companies use both Rillet and Tabs?
Yes. 1 company uses both on usedby, including LangChain.
Who uses Rillet?
20 companies on usedby, each with the public page that shows it. See who uses Rillet.
Who uses Tabs?
26 companies on usedby, each with the public page that shows it. See who uses Tabs.
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.