Brandwave

Customer.io vs Firebase Cloud Messaging:Which is more popular?

In September 2026, Customer.io had more branded searches than Firebase Cloud Messaging among push notification services worldwide. Customer.io had about 12,300 branded searches, while Firebase Cloud Messaging had 8,100. Customer.io made up 10.4% of all push notification service searches we track, and Firebase Cloud Messaging accounted for 6.9%. When we asked ChatGPT and Google AI Overviews about push notification services, Firebase Cloud Messaging appeared in all five answers and Customer.io in two. Firebase Cloud Messaging was mentioned before Customer.io in every answer.

Among push notification services worldwide in September 2026

Who do people search for more?

Customer.io, about 51% more searches than Firebase Cloud Messaging

Customer.io 12.3K searchesFirebase Cloud Messaging 8.1K searches

Who does AI mention more?

Firebase Cloud Messaging, mentioned in every answer we collected

Firebase Cloud Messaging in 5 of 5Customer.io in 2 of 5

Who does AI recommend more?

Firebase Cloud Messaging, named ahead of Customer.io in every answer

Firebase Cloud Messaging first in 5Customer.io never first

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Top push notification services in ChatGPT and Google AI Overviews

In three ChatGPT questions and two Google AI Overviews, Firebase Cloud Messaging appeared in all five answers. Customer.io was mentioned in two out of five: in two of the three ChatGPT answers, but not in either of the two Google AI Overviews. Firebase Cloud Messaging was listed before Customer.io in every answer.

Most recommended by AI

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

  1. OneSignal1st
  2. Firebase Cloud Messaging2nd
  3. PushEngage3rd
  4. Customer.io4th
  5. Braze5th
  6. Airship6th
  7. Pusher–
  8. Pushwoosh–
  9. Iterable–
  10. CleverTap–
  11. +1 more

Mentioned by AI

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

  • OneSignal5 of 5Named in 3 of 3 ChatGPT answersNamed in 2 of 2 Google answers
  • Firebase Cloud Messaging5 of 5Named in 3 of 3 ChatGPT answersNamed in 2 of 2 Google answers
  • PushEngage3 of 5Named in 1 of 3 ChatGPT answersNamed in 2 of 2 Google answers
  • Customer.io2 of 5Named in 2 of 3 ChatGPT answersNamed in 0 of 2 Google answers
  • Braze2 of 5Named in 2 of 3 ChatGPT answersNamed in 0 of 2 Google answers
  • Airship1 of 5Named in 1 of 3 ChatGPT answersNamed in 0 of 2 Google answers
  • Pusher0 of 5Named in 0 of 3 ChatGPT answersNamed in 0 of 2 Google answers
  • Pushwoosh0 of 5Named in 0 of 3 ChatGPT answersNamed in 0 of 2 Google answers
  • Iterable0 of 5Named in 0 of 3 ChatGPT answersNamed in 0 of 2 Google answers
  • CleverTap0 of 5Named in 0 of 3 ChatGPT answersNamed in 0 of 2 Google answers

+1 more

See every answer about push notification services

5 answers

Not named in any answer:

Brands are shown in the order each answer named them. The survey took place in the United States on October 21, 2026.

Is Customer.io or Firebase Cloud Messaging more popular in search?

This chart shows how often people search Google for Customer.io and Firebase Cloud Messaging by name. Each line represents a brand's share of searches for all 11 push notification services we track, month by month, from English-language searches worldwide.

Customer.io and Firebase Cloud Messaging among push notification services worldwide, by month

Share of searches by month for Customer.io, Firebase Cloud Messaging. The figures are in the table below the chart.

View monthly share of searches table
MonthOneSignalPusherCustomer.ioFirebase Cloud MessagingBrazePushwooshPushEngageIterableAirshipCleverTapMoEngage
Oct 202544.9%29.7%9%8.9%4.6%1.4%0.73%0.49%0.18%0.12%0.02%
Nov 202549.5%26.9%8.2%8%4.4%1.3%0.81%0.45%0.17%0.11%0.04%
Dec 202545.1%29.6%9%8.8%4.4%1.4%0.78%0.46%0.22%0.12%0.03%
Jan 202648.5%26.1%9.7%7.8%5%1.3%0.79%0.54%0.2%0.09%0.03%
Feb 202643.7%28.7%10.7%8.6%5.2%1.4%0.76%0.51%0.22%0.15%0.03%
Mar 202644.8%29.4%9%8.8%4.4%2.1%0.64%0.55%0.17%0.09%0.02%
Apr 202649.1%26.4%9.8%7.9%4%1.3%0.7%0.49%0.2%0.14%0.03%
May 202649.1%26.4%9.8%7.9%4.2%1.3%0.47%0.59%0.17%0.1%0.02%
Jun 202647.8%26.6%9.9%7.9%4.8%1.3%0.8%0.55%0.21%0.11%0.02%
Jul 202646.7%27.7%10.3%8.3%4.5%1.3%0.49%0.53%0.21%0.09%0.03%
Aug 202646.9%27.7%10.2%8.3%4.6%1.1%0.49%0.48%0.2%0.1%0.03%
Sep 202647.5%28%10.4%6.9%4.8%1.1%0.5%0.47%0.2%0.08%0.03%

How has the Customer.io and Firebase Cloud Messaging comparison changed over the last 12 months?

3 findings

How did search popularity change for push notification services worldwide in September 2026?

1 change

  1. In September 2026, Firebase Cloud Messaging lost share of searches among push notification services worldwide, from 8.3% to 6.9%.

How are branded searches counted?

7 search terms

Brandwave collects information about searches that people make online using Customer.io’s and Firebase Cloud Messaging’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.

Customer.io

6 branded search terms

  • customer io
  • customer io crm
  • customer io email
  • customer io sms
  • customer io whatsapp
  • Customer.io

Firebase Cloud Messaging

1 branded search term

  • firebase cloud messaging

How the Brand Demand Index is measured

Other head-to-heads among push notification services

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