AgentMail vs OpenRouter: who uses which
Customers, public proof and the companies that use both.
On usedby, 13 companies use AgentMail and 16 use OpenRouter. 1 company uses both, including Replit. OpenRouter leads among the DevTools & Infrastructure companies on usedby that use either tool.Latest check Oct 25, 2026: 29 of 29 public lines checked. Counts include every proof level, job-post signals included. A company on both tools counts at any proof level, and a job post on one side is marked as such.
Who uses AgentMail, OpenRouter, or both
Every company with a public proof for at least one of the two tools.
12
listed for AgentMail only
1
company uses both
15
listed for OpenRouter only
On usedby, 12 companies are listed for AgentMail only, 15 are listed for OpenRouter only and 1 uses both, out of the 28 companies listed for at least one. An absent listing does not prove non-use.
Who uses both
Companies with a public line on both tools, at any proof level: the strongest proofs come first, and a job post is marked.
| Company | First public proof, OpenRouter |
|---|---|
 Replit | On or before Oct 2026 |
By industry
Which tool the companies on usedby use, by industry. Shares of the companies on usedby that use AgentMail, OpenRouter or both: a share of the companies on usedby, not of the market.
Listed for AgentMail onlyBothListed for OpenRouter only
More common with OpenRouter
- DevTools & Infrastructure7 of the 8 DevTools & Infrastructure companies on usedby that use either tool use OpenRouter, 1 of them alongside AgentMail.
- Artificial Intelligence5 of the 6 Artificial Intelligence companies on usedby that use either tool use OpenRouter.
Source: every usedby line, from confirmed proofs to job-post signals (the weakest proof level).
Side by side
Facts from our data and from each vendor's public pages. Each line says where it comes from.
AgentMailOpenRouterQuestions about AgentMail and OpenRouter
Which is used more, AgentMail or OpenRouter?
OpenRouter has more customers on usedby: 16 against 13 for AgentMail.
Do companies use both AgentMail and OpenRouter?
Yes. 1 company uses both on usedby, including Replit.
Who uses AgentMail?
13 companies on usedby, each with the public page that shows it. See who uses AgentMail.
Who uses OpenRouter?
16 companies on usedby, each with the public page that shows it. See who uses OpenRouter.
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 four proof levels: confirmed, declared by the company itself, observed or signal (a job post, the weakest). A company counts as using both tools when it has a line on each, at any level; the list shows the strongest proofs first and marks job posts.