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Top 20 User Authentication SDKs Used in Android Apps on Google Play
Last update: 20 Jan 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, 73.87% have integrated Firebase Authentication. This accounts for 53.82% of app downloads within the user authentication SDK category.

Total Apps
356.76k
Google Play
App Share
73.87%
Google Play
Apps
333.55k
Games
23.21k
Total Downloads
240.81b
Google Play
Download Share
53.82%
Google Play
App Downloads
173.77b
Game Downloads
67.04b

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

Among all apps utilizing user authentication SDKs, 46.26% have integrated Google reCAPTCHA. This accounts for 28.54% of app downloads within the user authentication SDK category.

Total Apps
223.44k
Google Play
App Share
46.26%
Google Play
Apps
207.85k
Games
15.60k
Total Downloads
127.69b
Google Play
Download Share
28.54%
Google Play
App Downloads
86.68b
Game Downloads
41.01b

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

Among all apps utilizing user authentication SDKs, 8.85% have integrated Truecaller. This accounts for 3.87% of app downloads within the user authentication SDK category.

Total Apps
42.72k
Google Play
App Share
8.85%
Google Play
Apps
42.68k
Games
42
Total Downloads
17.34b
Google Play
Download Share
3.87%
Google Play
App Downloads
16.83b
Game Downloads
509.83m

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

Among all apps utilizing user authentication SDKs, 8.45% have integrated OTPless. This accounts for <1% of app downloads within the user authentication SDK category.

Total Apps
40.79k
Google Play
App Share
8.45%
Google Play
Apps
40.77k
Games
24
Total Downloads
1.81b
Google Play
Download Share
<1%
Google Play
App Downloads
1.74b
Game Downloads
71.20m

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 16.92% 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
35.78k
Google Play
App Share
7.41%
Google Play
Apps
35.46k
Games
312
Total Downloads
75.72b
Google Play
Download Share
16.92%
Google Play
App Downloads
74.45b
Game Downloads
1.27b

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

Among all apps utilizing user authentication SDKs, 6.13% have integrated Amazon AWS Cognito Federated Identities. This accounts for 7.92% of app downloads within the user authentication SDK category.

Total Apps
29.59k
Google Play
App Share
6.13%
Google Play
Apps
29.23k
Games
360
Total Downloads
35.44b
Google Play
Download Share
7.92%
Google Play
App Downloads
26.24b
Game Downloads
9.21b

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

Among all apps utilizing user authentication SDKs, 4.24% have integrated Auth0. This accounts for 6.50% 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
20.48k
Google Play
App Share
4.24%
Google Play
Apps
19.98k
Games
493
Total Downloads
29.09b
Google Play
Download Share
6.50%
Google Play
App Downloads
23.50b
Game Downloads
5.59b

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 1.25% of app downloads within the user authentication SDK category.

Total Apps
9.11k
Google Play
App Share
1.89%
Google Play
Apps
9.02k
Games
90
Total Downloads
5.60b
Google Play
Download Share
1.25%
Google Play
App Downloads
5.36b
Game Downloads
244.64m

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

Among all apps utilizing user authentication SDKs, 1.38% have integrated Microsoft Authentication Library. This accounts for 7.67% of app downloads within the user authentication SDK category.

Total Apps
6.66k
Google Play
App Share
1.38%
Google Play
Apps
6.65k
Games
10
Total Downloads
34.31b
Google Play
Download Share
7.67%
Google Play
App Downloads
34.31b
Game Downloads
4.25m

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
4.39k
Google Play
App Share
<1%
Google Play
Apps
4.39k
Games
0
Total Downloads
1.74b
Google Play
Download Share
<1%
Google Play
App Downloads
1.74b
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
3.99k
Google Play
App Share
<1%
Google Play
Apps
3.99k
Games
2
Total Downloads
698.93m
Google Play
Download Share
<1%
Google Play
App Downloads
698.63m
Game Downloads
305.57k

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 4.14% 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
2.23k
Google Play
App Share
<1%
Google Play
Apps
1.79k
Games
437
Total Downloads
18.54b
Google Play
Download Share
4.14%
Google Play
App Downloads
16.18b
Game Downloads
2.37b

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
1.75k
Google Play
App Share
<1%
Google Play
Apps
1.74k
Games
6
Total Downloads
2.61b
Google Play
Download Share
<1%
Google Play
App Downloads
2.61b
Game Downloads
1.69m

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
1.19k
Google Play
App Share
<1%
Google Play
Apps
1.15k
Games
44
Total Downloads
6.59b
Google Play
Download Share
1.47%
Google Play
App Downloads
6.46b
Game Downloads
132.80m

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
1.14k
Google Play
App Share
<1%
Google Play
Apps
1.13k
Games
15
Total Downloads
1.73b
Google Play
Download Share
<1%
Google Play
App Downloads
1.70b
Game Downloads
33.64m

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

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
1.06k
Google Play
App Share
<1%
Google Play
Apps
1.05k
Games
6
Total Downloads
1.74b
Google Play
Download Share
<1%
Google Play
App Downloads
1.74b
Game Downloads
711.45k

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

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
1.03k
Google Play
App Share
<1%
Google Play
Apps
1.03k
Games
0
Total Downloads
628.39m
Google Play
Download Share
<1%
Google Play
App Downloads
628.38m
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 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
700
Google Play
App Share
<1%
Google Play
Apps
684
Games
16
Total Downloads
1.49b
Google Play
Download Share
<1%
Google Play
App Downloads
1.49b
Game Downloads
2.89m

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
635
Google Play
App Share
<1%
Google Play
Apps
635
Games
0
Total Downloads
170.92m
Google Play
Download Share
<1%
Google Play
App Downloads
170.75m
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
542
Google Play
App Share
<1%
Google Play
Apps
536
Games
6
Total Downloads
722.69m
Google Play
Download Share
<1%
Google Play
App Downloads
721.84m
Game Downloads
847.90k

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.