MongoDB Atlas vs Weaviate: who uses which
Customers, public proof and the companies that use both.
On usedby, 4 companies use MongoDB Atlas and 49 use Weaviate. 1 company uses both, including Cisco. Weaviate leads among the Artificial Intelligence companies on usedby that use either tool.Latest check Nov 13, 2026: 53 of 53 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 MongoDB Atlas, Weaviate, or both
Every company with a public proof for at least one of the two tools.
3
listed for MongoDB Atlas only
1
company uses both
48
listed for Weaviate only
On usedby, 3 companies are listed for MongoDB Atlas only, 48 are listed for Weaviate only and 1 uses both, out of the 52 companies listed for at least one. An absent listing does not prove non-use.
Where it lands
Recently publicly listed customers
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, Weaviate |
|---|---|
 Cisco | On or before Sep 2025 |
Side by side
Facts from our data and from each vendor's public pages. Each line says where it comes from.
Vendor facts checked: MongoDB Atlas, 0 of 6; Weaviate, 5 of 6. Missing facts remain unverified, not absent features.
MongoDB Atlas
WeaviateWhat customers report
Results as the vendor or the customer published them, with the source and the date.
MongoDB Atlas
No reviewed story for MongoDB Atlas yet.
Weaviate
they reduced their operational costs by over 80%
predori
Vendor case study, weaviate.io, captured Nov 10, 2026
Questions about MongoDB Atlas and Weaviate
Which is used more, MongoDB Atlas or Weaviate?
Weaviate has more customers on usedby: 49 against 4 for MongoDB Atlas.
Do companies use both MongoDB Atlas and Weaviate?
Yes. 1 company uses both on usedby, including Cisco.
Who uses MongoDB Atlas?
4 companies on usedby, each with the public page that shows it. See who uses MongoDB Atlas.
Who uses Weaviate?
49 companies on usedby, each with the public page that shows it. See who uses Weaviate.
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.