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Top 20 User Authentication SDKs Used in Android Apps on Google Play
Last update: 11 Oct 2026 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, 73.49% have integrated Firebase Authentication. This accounts for 53.08% of app downloads within the user authentication SDK category.

Total Apps
407.04k
Google Play
App Share
73.49%
Google Play
Apps
377.43k
Games
29.61k
Total Downloads
277.41b
Google Play
Download Share
53.08%
Google Play
App Downloads
204.82b
Game Downloads
72.59b

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

Among all apps utilizing user authentication SDKs, 53.13% have integrated Google reCAPTCHA. This accounts for 27.91% of app downloads within the user authentication SDK category.

Total Apps
294.31k
Google Play
App Share
53.13%
Google Play
Apps
271.39k
Games
22.92k
Total Downloads
145.85b
Google Play
Download Share
27.91%
Google Play
App Downloads
96.90b
Game Downloads
48.95b

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

Among all apps utilizing user authentication SDKs, 7.69% have integrated Truecaller. This accounts for 3.57% of app downloads within the user authentication SDK category.

Total Apps
42.58k
Google Play
App Share
7.69%
Google Play
Apps
42.54k
Games
34
Total Downloads
18.65b
Google Play
Download Share
3.57%
Google Play
App Downloads
18.07b
Game Downloads
580.89m

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

Among all apps utilizing user authentication SDKs, 7.38% have integrated AppAuth by OpenID. This accounts for 18.79% 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
40.87k
Google Play
App Share
7.38%
Google Play
Apps
40.46k
Games
412
Total Downloads
98.22b
Google Play
Download Share
18.79%
Google Play
App Downloads
96.74b
Game Downloads
1.47b

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

Among all apps utilizing user authentication SDKs, 7.29% have integrated OTPless. This accounts for <1% of app downloads within the user authentication SDK category.

Total Apps
40.38k
Google Play
App Share
7.29%
Google Play
Apps
40.37k
Games
20
Total Downloads
1.15b
Google Play
Download Share
<1%
Google Play
App Downloads
1.07b
Game Downloads
78.20m

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

Among all apps utilizing user authentication SDKs, 5.27% have integrated Amazon AWS Cognito Federated Identities. This accounts for 6.95% of app downloads within the user authentication SDK category.

Total Apps
29.19k
Google Play
App Share
5.27%
Google Play
Apps
28.90k
Games
290
Total Downloads
36.34b
Google Play
Download Share
6.95%
Google Play
App Downloads
28.11b
Game Downloads
8.23b

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

Among all apps utilizing user authentication SDKs, 4.93% have integrated Auth0. This accounts for 6.28% 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
27.28k
Google Play
App Share
4.93%
Google Play
Apps
26.41k
Games
872
Total Downloads
32.83b
Google Play
Download Share
6.28%
Google Play
App Downloads
26.64b
Game Downloads
6.19b

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

Among all apps utilizing user authentication SDKs, 1.85% have integrated FingerprintJS. This accounts for 1.74% of app downloads within the user authentication SDK category.

Total Apps
10.24k
Google Play
App Share
1.85%
Google Play
Apps
10.11k
Games
126
Total Downloads
9.07b
Google Play
Download Share
1.74%
Google Play
App Downloads
8.44b
Game Downloads
630.67m

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

Among all apps utilizing user authentication SDKs, 1.46% have integrated Microsoft Authentication Library. This accounts for 7.18% of app downloads within the user authentication SDK category.

Total Apps
8.07k
Google Play
App Share
1.46%
Google Play
Apps
8.06k
Games
8
Total Downloads
37.53b
Google Play
Download Share
7.18%
Google Play
App Downloads
37.52b
Game Downloads
4.37m

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
4.36k
Google Play
App Share
<1%
Google Play
Apps
4.36k
Games
0
Total Downloads
1.91b
Google Play
Download Share
<1%
Google Play
App Downloads
1.91b
Game Downloads
257.99k

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
3.78k
Google Play
App Share
<1%
Google Play
Apps
3.77k
Games
14
Total Downloads
682.19m
Google Play
Download Share
<1%
Google Play
App Downloads
675.83m
Game Downloads
6.36m

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 3.95% 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
3.23k
Google Play
App Share
<1%
Google Play
Apps
1.67k
Games
1.56k
Total Downloads
20.64b
Google Play
Download Share
3.95%
Google Play
App Downloads
18.65b
Game Downloads
1.98b

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
1.62k
Google Play
App Share
<1%
Google Play
Apps
1.62k
Games
6
Total Downloads
3.33b
Google Play
Download Share
<1%
Google Play
App Downloads
3.33b
Game Downloads
955.79k

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

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
1.41k
Google Play
App Share
<1%
Google Play
Apps
1.40k
Games
16
Total Downloads
2.20b
Google Play
Download Share
<1%
Google Play
App Downloads
2.16b
Game Downloads
35.47m

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
1.32k
Google Play
App Share
<1%
Google Play
Apps
1.32k
Games
0
Total Downloads
823.68m
Google Play
Download Share
<1%
Google Play
App Downloads
823.67m
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 Facetec. This accounts for 1.50% of app downloads within the user authentication SDK category.

Total Apps
1.15k
Google Play
App Share
<1%
Google Play
Apps
1.06k
Games
93
Total Downloads
7.86b
Google Play
Download Share
1.50%
Google Play
App Downloads
7.68b
Game Downloads
185.18m

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

Among all apps utilizing user authentication SDKs, <1% have integrated Huawei HMS Account Kit. This accounts for 1.78% of app downloads within the user authentication SDK category.

Total Apps
974
Google Play
App Share
<1%
Google Play
Apps
913
Games
61
Total Downloads
9.30b
Google Play
Download Share
1.78%
Google Play
App Downloads
8.99b
Game Downloads
309.73m

Use the 42matters SDK Explorer to find all apps that use Huawei HMS Account Kit.

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
963
Google Play
App Share
<1%
Google Play
Apps
956
Games
7
Total Downloads
2.92b
Google Play
Download Share
<1%
Google Play
App Downloads
2.92b
Game Downloads
1.12m

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
717
Google Play
App Share
<1%
Google Play
Apps
701
Games
16
Total Downloads
1.62b
Google Play
Download Share
<1%
Google Play
App Downloads
1.62b
Game Downloads
3.36m

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
678
Google Play
App Share
<1%
Google Play
Apps
678
Games
0
Total Downloads
145.40m
Google Play
Download Share
<1%
Google Play
App Downloads
145.23m
Game Downloads
169.51k

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

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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.