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Top 20 User Authentication SDKs Used in Android Apps on Google Play
Last update: 21 Dec 2025 CET
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Top 20 User Authentication SDKs Used in Android Apps on Google Play

We at 42matters have identified the 20 most popular User Authentication SDKs leveraged by Android apps available on the Android app market.

User Authentication SDKs enable developers to add user authentication capabilities, such as login, registration, and access control, to their mobile apps. They commonly offer user management, identity verification, password reset, and other related capabilities.

This list is based on our analysis of the millions of mobile applications – and the 2,300+ SDKs they use – that constitute the vast inventory of the Google Play Store. The accompanying data provides readers with a glimpse into the rich mobile application insights generated by the 42matters technology. This data is also available via our APIs, file dumps, Explorer, and SDK Explorer.

The intended purpose of this article is to assist app builders in their search for the perfect User Authentication SDK to leverage in their app, as well as to give SDK developers insight into their biggest competitors and potential customers. This data collected by our technology may also serve as a useful tool for folks researching the wider mobile app market.

Among all apps utilizing user authentication SDKs, 73.96% have integrated Firebase Authentication. This accounts for 53.91% of app downloads within the user authentication SDK category.

Total Apps
349.83k
Google Play
App Share
73.96%
Google Play
Apps
327.29k
Games
22.53k
Total Downloads
238.82b
Google Play
Download Share
53.91%
Google Play
App Downloads
171.85b
Game Downloads
66.97b

Use the 42matters SDK Explorer to find all apps that use Firebase Authentication.

Among all apps utilizing user authentication SDKs, 45.24% have integrated Google reCAPTCHA. This accounts for 28.40% of app downloads within the user authentication SDK category.

Total Apps
214.00k
Google Play
App Share
45.24%
Google Play
Apps
199.03k
Games
14.96k
Total Downloads
125.83b
Google Play
Download Share
28.40%
Google Play
App Downloads
85.35b
Game Downloads
40.48b

Use the 42matters SDK Explorer to find all apps that use Google reCAPTCHA.

Among all apps utilizing user authentication SDKs, 9.04% have integrated Truecaller. This accounts for 3.86% of app downloads within the user authentication SDK category.

Total Apps
42.77k
Google Play
App Share
9.04%
Google Play
Apps
42.73k
Games
43
Total Downloads
17.11b
Google Play
Download Share
3.86%
Google Play
App Downloads
16.60b
Game Downloads
506.46m

Use the 42matters SDK Explorer to find all apps that use Truecaller.

Among all apps utilizing user authentication SDKs, 8.63% have integrated OTPless. This accounts for <1% of app downloads within the user authentication SDK category.

Total Apps
40.81k
Google Play
App Share
8.63%
Google Play
Apps
40.78k
Games
24
Total Downloads
1.78b
Google Play
Download Share
<1%
Google Play
App Downloads
1.71b
Game Downloads
70.50m

Use the 42matters SDK Explorer to find all apps that use OTPless.

Among all apps utilizing user authentication SDKs, 7.41% have integrated AppAuth by OpenID. This accounts for 16.89% of app downloads within the user authentication SDK category.

AppAuth for Android is a client SDK for communicating with OAuth 2.0 and OpenID Connect providers. It strives to directly map the requests and responses of those specifications, while following the idiomatic style of the implementation language.

Total Apps
35.04k
Google Play
App Share
7.41%
Google Play
Apps
34.73k
Games
311
Total Downloads
74.84b
Google Play
Download Share
16.89%
Google Play
App Downloads
73.58b
Game Downloads
1.26b

Use the 42matters SDK Explorer to find all apps that use AppAuth by OpenID.

Among all apps utilizing user authentication SDKs, 6.27% have integrated Amazon AWS Cognito Federated Identities. This accounts for 7.96% of app downloads within the user authentication SDK category.

Total Apps
29.66k
Google Play
App Share
6.27%
Google Play
Apps
29.31k
Games
354
Total Downloads
35.27b
Google Play
Download Share
7.96%
Google Play
App Downloads
26.12b
Game Downloads
9.16b

Use the 42matters SDK Explorer to find all apps that use Amazon AWS Cognito Federated Identities.

Among all apps utilizing user authentication SDKs, 4.23% have integrated Auth0. This accounts for 6.09% of app downloads within the user authentication SDK category.

Auth0 is an easy to implement, adaptable authentication and authorization platform. They make your login box awesome.

Total Apps
20.00k
Google Play
App Share
4.23%
Google Play
Apps
19.52k
Games
479
Total Downloads
26.97b
Google Play
Download Share
6.09%
Google Play
App Downloads
21.44b
Game Downloads
5.53b

Use the 42matters SDK Explorer to find all apps that use Auth0.

Among all apps utilizing user authentication SDKs, 1.89% have integrated FingerprintJS. This accounts for 1.27% of app downloads within the user authentication SDK category.

Total Apps
8.95k
Google Play
App Share
1.89%
Google Play
Apps
8.86k
Games
84
Total Downloads
5.63b
Google Play
Download Share
1.27%
Google Play
App Downloads
5.39b
Game Downloads
242.82m

Use the 42matters SDK Explorer to find all apps that use FingerprintJS.

Among all apps utilizing user authentication SDKs, 1.40% have integrated Microsoft Authentication Library. This accounts for 7.67% of app downloads within the user authentication SDK category.

Total Apps
6.64k
Google Play
App Share
1.40%
Google Play
Apps
6.63k
Games
10
Total Downloads
33.99b
Google Play
Download Share
7.67%
Google Play
App Downloads
33.99b
Game Downloads
4.24m

Use the 42matters SDK Explorer to find all apps that use Microsoft Authentication Library.

Among all apps utilizing user authentication SDKs, <1% have integrated Mitek MiSnap. This accounts for <1% of app downloads within the user authentication SDK category.

Mitek MiSnap is a patented mobile capture SDK that enables an intuitive user experience and instant capture of quality images.

Total Apps
4.42k
Google Play
App Share
<1%
Google Play
Apps
4.42k
Games
1
Total Downloads
1.73b
Google Play
Download Share
<1%
Google Play
App Downloads
1.73b
Game Downloads
877.61k

Use the 42matters SDK Explorer to find all apps that use Mitek MiSnap.

Among all apps utilizing user authentication SDKs, <1% have integrated Kount by Equifax. This accounts for <1% of app downloads within the user authentication SDK category.

Total Apps
3.90k
Google Play
App Share
<1%
Google Play
Apps
3.90k
Games
2
Total Downloads
682.73m
Google Play
Download Share
<1%
Google Play
App Downloads
682.43m
Game Downloads
299.64k

Use the 42matters SDK Explorer to find all apps that use Kount by Equifax.

Among all apps utilizing user authentication SDKs, <1% have integrated Signpost. This accounts for 4.23% of app downloads within the user authentication SDK category.

Signpost is the easy and intuitive solution for signing HTTP messages on the Java platform in conformance with the OAuth Core 1.0a standard. The Signpost SDK follows a modular and flexible design, allowing you to combine it with different HTTP messaging layers.

Total Apps
2.18k
Google Play
App Share
<1%
Google Play
Apps
1.78k
Games
395
Total Downloads
18.75b
Google Play
Download Share
4.23%
Google Play
App Downloads
16.30b
Game Downloads
2.45b

Use the 42matters SDK Explorer to find all apps that use Signpost.

Among all apps utilizing user authentication SDKs, <1% have integrated FraudForce by iovation. This accounts for <1% of app downloads within the user authentication SDK category.

Total Apps
1.78k
Google Play
App Share
<1%
Google Play
Apps
1.77k
Games
4
Total Downloads
2.61b
Google Play
Download Share
<1%
Google Play
App Downloads
2.61b
Game Downloads
1.67m

Use the 42matters SDK Explorer to find all apps that use FraudForce by iovation.

Among all apps utilizing user authentication SDKs, <1% have integrated Facetec. This accounts for 1.47% of app downloads within the user authentication SDK category.

Total Apps
1.24k
Google Play
App Share
<1%
Google Play
Apps
1.14k
Games
104
Total Downloads
6.51b
Google Play
Download Share
1.47%
Google Play
App Downloads
6.37b
Game Downloads
130.52m

Use the 42matters SDK Explorer to find all apps that use Facetec.

Among all apps utilizing user authentication SDKs, <1% have integrated SumSub. This accounts for <1% of app downloads within the user authentication SDK category.

Total Apps
1.11k
Google Play
App Share
<1%
Google Play
Apps
1.09k
Games
15
Total Downloads
1.71b
Google Play
Download Share
<1%
Google Play
App Downloads
1.68b
Game Downloads
33.55m

Use the 42matters SDK Explorer to find all apps that use SumSub.

Among all apps utilizing user authentication SDKs, <1% have integrated Regula Document Reader. This accounts for <1% of app downloads within the user authentication SDK category.

Regula is an OCR SDK for document data capture and text recognition. It enables id card scanning and passports and driving licenses on the go.

Total Apps
1.00k
Google Play
App Share
<1%
Google Play
Apps
1.00k
Games
0
Total Downloads
615.02m
Google Play
Download Share
<1%
Google Play
App Downloads
615.01m
Game Downloads
13.52k

Use the 42matters SDK Explorer to find all apps that use Regula Document Reader.

Among all apps utilizing user authentication SDKs, <1% have integrated iProov. This accounts for <1% of app downloads within the user authentication SDK category.

Total Apps
988
Google Play
App Share
<1%
Google Play
Apps
984
Games
4
Total Downloads
1.69b
Google Play
Download Share
<1%
Google Play
App Downloads
1.69b
Game Downloads
679.31k

Use the 42matters SDK Explorer to find all apps that use iProov.

Among all apps utilizing user authentication SDKs, <1% have integrated Onfido Capture. This accounts for <1% of app downloads within the user authentication SDK category.

The Onfido Capture SDK is an AI-based technology that assesses whether a user’s government-issued ID is genuine or fraudulent. It then compares it against their facial biometrics.

Total Apps
701
Google Play
App Share
<1%
Google Play
Apps
685
Games
16
Total Downloads
1.48b
Google Play
Download Share
<1%
Google Play
App Downloads
1.48b
Game Downloads
2.83m

Use the 42matters SDK Explorer to find all apps that use Onfido Capture.

Among all apps utilizing user authentication SDKs, <1% have integrated Okta. This accounts for <1% of app downloads within the user authentication SDK category.

Total Apps
633
Google Play
App Share
<1%
Google Play
Apps
633
Games
0
Total Downloads
169.53m
Google Play
Download Share
<1%
Google Play
App Downloads
169.36m
Game Downloads
169.51k

Use the 42matters SDK Explorer to find all apps that use Okta.

Among all apps utilizing user authentication SDKs, <1% have integrated Sinch. This accounts for <1% of app downloads within the user authentication SDK category.

Sinch is an SDK that enables developers to connect with customers and make engagement personal with simple, programmable SMS, voice, video, and verification tools.

Total Apps
560
Google Play
App Share
<1%
Google Play
Apps
553
Games
7
Total Downloads
714.62m
Google Play
Download Share
<1%
Google Play
App Downloads
713.76m
Game Downloads
867.21k

Use the 42matters SDK Explorer to find all apps that use Sinch.

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Frequently Asked Questions (FAQs)

How does 42matters collect this data?'

We’ve developed a number of machine learning algorithms that scan millions of mobile and connected TV (CTV) applications on a regular basis. In addition, we collect ground truth app performance intelligence and use this data to build statistical models that estimate the performance of apps for which we do not have ground truth data.

What SDK data does 42matters collect?'

We track over 2,300 of the most popular SDKs integrated in iOS and Android apps. We collect a variety of SDK insights (title, platform, ID, category, and developer website); performance metrics (the number of apps that have installed each SDK, installation and removal trends, and app downloads); market share statistics (including market share per app category); and more!

How can I access 42matters’ SDK data?'

The most direct way is to use our SDK Explorer, which is a visual, web-based research platform that enables you to peruse all 2,300+ SDKs that we track. It’s great for market research, lead generation, competitor analysis, etc. However, more technically-inclined folks might prefer our APIs and File Dumps, which enable you to query info for specific apps or SDKs. You can also use our other research platform (the Explorer) to view integrated SDKs by app.

Can I use 42matters’ solutions to generate app publisher leads?'

Absolutely! We actually wrote about this on our blog. We focused on ad network SDKs, but the examples are applicable to most SDK types. To summarize, you can use the Explorer’s advanced filtering capabilities to home in on best-fit app publishers, leverage the SDK Explorer to see which apps use your competitors’ SDKs, and use our APIs and file dumps to build custom lead generation processes.

What data does 42matters provide on mobile apps?'

A ton! We track 17+ million apps across Google Play, the Apple App Store, Amazon Appstore, Tencent Appstore, and Huawei AppGallery. Our solutions provide access to app details (developer insights, metadata, ASO keywords, contact information, etc.); performance metrics (downloads, MAUs, ratings, reviews, top chart rankings, etc.); technical insights (integrated SDKs, permissions, required capabilities, etc.); content details (categories, genres, IAB categories, content ratings, etc.); compliance information (app-ads.txt, privacy policies, store status, etc.) and much, much more!

Can I use 42matters’ solutions to find SDKs for my app?'

Definitely. The SDK Explorer enables you to sort SDKs by category, identify similar SDKs, analyze SDK reliability, and more. In addition, you can use the Explorer to monitor your competitors, including which SDKs they add and remove, their current tech stacks, and SDK changelogs. This means you use our solutions not only to find the right SDK for a particular purpose, but also which SDKs you might need to keep up with your rivals.