Azure Cosmos DB vs Firestore:Which is more popular?

Name: Azure Cosmos DB vs Firestore: Which is searched more?
Creator: Brandwave
License: https://creativecommons.org/licenses/by/4.0/

In September 2026, Firestore had more branded searches than Azure Cosmos DB among document databases worldwide. Firestore had about 49,500 branded searches, while Azure Cosmos DB had 6,600. Firestore made up 6.5% of all document database searches we track, and Azure Cosmos DB accounted for 0.87%. When we asked ChatGPT and Google AI Overviews about document databases, Firestore appeared in three of the five answers and Azure Cosmos DB in two. Firestore was mentioned before Azure Cosmos DB in three out of five answers.

Among document databases worldwide in September 2026

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Top document databases in ChatGPT and Google AI Overviews

In three ChatGPT questions and two Google AI Overviews, Firestore was mentioned in three out of five: in two of the three ChatGPT answers and in one of the two Google AI Overviews. Azure Cosmos DB was mentioned in two out of five: in one of the three ChatGPT answers and in one of the two Google AI Overviews. Firestore was listed before Azure Cosmos DB in three out of five answers.

Most recommended by AI

Brands get a higher ranking if they are mentioned earlier in the answers.

Mentioned by AI

Each dot is one answer, filled in when that answer mentions the brand.

How many AI answers named each brand
Brand	ChatGPT	Google	Answers that named it
MongoDB	Named in 3 of 3 ChatGPT answers	Named in 2 of 2 Google AI Overviews	5 of 5
Couchbase	Named in 2 of 3 ChatGPT answers	Named in 2 of 2 Google AI Overviews	4 of 5
Amazon DynamoDB	Named in 3 of 3 ChatGPT answers	Named in 1 of 2 Google AI Overviews	4 of 5
Firestore	Named in 2 of 3 ChatGPT answers	Named in 1 of 2 Google AI Overviews	3 of 5
CouchDB	Named in 2 of 3 ChatGPT answers	Named in 0 of 2 Google AI Overviews	2 of 5
Azure Cosmos DB	Named in 1 of 3 ChatGPT answers	Named in 1 of 2 Google AI Overviews	2 of 5
RavenDB	Named in 1 of 3 ChatGPT answers	Named in 0 of 2 Google AI Overviews	1 of 5

MongoDB5 of 5Named in 3 of 3 ChatGPT answersNamed in 2 of 2 Google answers
Couchbase4 of 5Named in 2 of 3 ChatGPT answersNamed in 2 of 2 Google answers
Amazon DynamoDB4 of 5Named in 3 of 3 ChatGPT answersNamed in 1 of 2 Google answers
Firestore3 of 5Named in 2 of 3 ChatGPT answersNamed in 1 of 2 Google answers
CouchDB2 of 5Named in 2 of 3 ChatGPT answersNamed in 0 of 2 Google answers
Azure Cosmos DB2 of 5Named in 1 of 3 ChatGPT answersNamed in 1 of 2 Google answers
RavenDB1 of 5Named in 1 of 3 ChatGPT answersNamed in 0 of 2 Google answers

See every answer about document databases

5 answers

Asked ChatGPT
“Which document database should I use?”
Asked ChatGPT
“What are the best document databases?”
1. 1MongoDB
2. 2Amazon DynamoDB
3. 3Firestore
4. 4Couchbase
5. 5CouchDB
6. 6RavenDB
Asked ChatGPT
“What's the best document database for app data?”
1. 1MongoDB
2. 2Firestore
3. 3Amazon DynamoDB
4. 4CouchDB
Searched Google, AI Overview
“document databases”
Searched Google, AI Overview
“nosql document database”

Brands are shown in the order each answer named them. The survey took place in the United States on October 20, 2026.

Is Azure Cosmos DB or Firestore more popular in search?

This chart shows how often people search Google for Azure Cosmos DB and Firestore by name. Each line represents a brand's share of searches for all seven document databases we track, month by month, from English-language searches worldwide.

Azure Cosmos DB and Firestore among document databases worldwide, by month

Month	MongoDB	Firestore	Couchbase	CouchDB	Azure Cosmos DB	Amazon DynamoDB	RavenDB
Oct 2025	86.1%	6.3%	1.9%	1.5%	1%	2.8%	0.25%
Nov 2025	88%	6.5%	1.6%	1.3%	1.1%	1.3%	0.26%
Dec 2025	87.7%	6.4%	1.9%	1.6%	1.1%	1.1%	0.25%
Jan 2026	87.5%	6.4%	1.9%	1.6%	1.3%	1.1%	0.25%
Feb 2026	87.5%	6.4%	1.9%	1.6%	1.3%	1.1%	0.25%
Mar 2026	88.5%	6.5%	1.6%	1.3%	1.1%	0.87%	0.2%
Apr 2026	89.1%	6.5%	1.3%	1.3%	0.88%	0.71%	0.17%
May 2026	87.5%	7.9%	1.6%	1.3%	0.86%	0.7%	0.21%
Jun 2026	87.7%	7.9%	1.6%	1.3%	0.86%	0.57%	0.17%
Jul 2026	88.8%	6.5%	2%	1.1%	0.87%	0.48%	0.25%
Aug 2026	86.9%	7.8%	1.9%	1.6%	0.85%	0.7%	0.25%
Sep 2026	88.9%	6.5%	1.6%	1.3%	0.87%	0.58%	0.21%

How has the Azure Cosmos DB and Firestore comparison changed over the last 12 months?

3 findings

Firestore was ahead of Azure Cosmos DB in every measured month of the 12 months ending September 2026.
Across the 12 months ending September 2026, Azure Cosmos DB’s share of searches among document databases worldwide moved from 1% to 0.87%, and its estimated monthly branded searches moved from 9.9K to 6.6K.
Across the 12 months ending September 2026, Firestore’s share of searches among document databases worldwide moved from 6.3% to 6.5%, and its estimated monthly branded searches moved from 60.5K to 49.5K.

How did search popularity change for document databases worldwide in September 2026?

2 changes

In September 2026, Firestore lost share of searches among document databases worldwide, from 7.8% to 6.5%.
Estimated monthly branded searches for Azure Cosmos DB worldwide fell 33.3% over 12 measured months, from 9.9K to 6.6K in September 2026.

How are branded searches counted?

2 search terms

Brandwave collects information about searches that people make online using Azure Cosmos DB’s and Firestore’s names. When viewed over time, estimated search volumes for these branded terms can be used to understand whether interest in the brands is growing, holding steady, or fading.