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Top 20 User Authentication SDKs Used in Android Apps on Google Play
Last update: 8 Apr 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, 73.73% have integrated Firebase Authentication. This accounts for 53.03% of app downloads within the user authentication SDK category.

Total Apps
373.55k
Google Play
App Share
73.73%
Google Play
Apps
348.54k
Games
25.01k
Total Downloads
254.58b
Google Play
Download Share
53.03%
Google Play
App Downloads
183.48b
Game Downloads
71.10b

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

Among all apps utilizing user authentication SDKs, 48.47% have integrated Google reCAPTCHA. This accounts for 30.17% of app downloads within the user authentication SDK category.

Total Apps
245.58k
Google Play
App Share
48.47%
Google Play
Apps
228.26k
Games
17.32k
Total Downloads
144.85b
Google Play
Download Share
30.17%
Google Play
App Downloads
99.81b
Game Downloads
45.04b

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

Among all apps utilizing user authentication SDKs, 8.43% have integrated Truecaller. This accounts for 3.86% of app downloads within the user authentication SDK category.

Total Apps
42.71k
Google Play
App Share
8.43%
Google Play
Apps
42.67k
Games
39
Total Downloads
18.55b
Google Play
Download Share
3.86%
Google Play
App Downloads
17.99b
Game Downloads
560.66m

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

Among all apps utilizing user authentication SDKs, 8.04% have integrated OTPless. This accounts for <1% of app downloads within the user authentication SDK category.

Total Apps
40.72k
Google Play
App Share
8.04%
Google Play
Apps
40.70k
Games
26
Total Downloads
1.89b
Google Play
Download Share
<1%
Google Play
App Downloads
1.81b
Game Downloads
76.17m

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

Among all apps utilizing user authentication SDKs, 7.28% have integrated AppAuth by OpenID. This accounts for 16.81% 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
36.89k
Google Play
App Share
7.28%
Google Play
Apps
36.58k
Games
306
Total Downloads
80.71b
Google Play
Download Share
16.81%
Google Play
App Downloads
79.37b
Game Downloads
1.35b

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

Among all apps utilizing user authentication SDKs, 5.88% have integrated Amazon AWS Cognito Federated Identities. This accounts for 7.86% of app downloads within the user authentication SDK category.

Total Apps
29.77k
Google Play
App Share
5.88%
Google Play
Apps
29.38k
Games
395
Total Downloads
37.71b
Google Play
Download Share
7.86%
Google Play
App Downloads
27.62b
Game Downloads
10.10b

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

Among all apps utilizing user authentication SDKs, 4.33% have integrated Auth0. This accounts for 6.62% 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
21.96k
Google Play
App Share
4.33%
Google Play
Apps
21.45k
Games
514
Total Downloads
31.78b
Google Play
Download Share
6.62%
Google Play
App Downloads
25.86b
Game Downloads
5.92b

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 1.43% of app downloads within the user authentication SDK category.

Total Apps
9.38k
Google Play
App Share
1.85%
Google Play
Apps
9.28k
Games
99
Total Downloads
6.84b
Google Play
Download Share
1.43%
Google Play
App Downloads
6.58b
Game Downloads
263.36m

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

Among all apps utilizing user authentication SDKs, 1.48% have integrated Microsoft Authentication Library. This accounts for 7.69% of app downloads within the user authentication SDK category.

Total Apps
7.50k
Google Play
App Share
1.48%
Google Play
Apps
7.49k
Games
11
Total Downloads
36.92b
Google Play
Download Share
7.69%
Google Play
App Downloads
36.91b
Game Downloads
4.34m

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
4.37k
Google Play
App Share
<1%
Google Play
Apps
4.37k
Games
0
Total Downloads
1.83b
Google Play
Download Share
<1%
Google Play
App Downloads
1.83b
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
3.96k
Google Play
App Share
<1%
Google Play
Apps
3.95k
Games
2
Total Downloads
651.80m
Google Play
Download Share
<1%
Google Play
App Downloads
651.47m
Game Downloads
330.76k

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 4.15% 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
2.25k
Google Play
App Share
<1%
Google Play
Apps
1.80k
Games
456
Total Downloads
19.92b
Google Play
Download Share
4.15%
Google Play
App Downloads
17.40b
Game Downloads
2.52b

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
1.71k
Google Play
App Share
<1%
Google Play
Apps
1.70k
Games
6
Total Downloads
2.73b
Google Play
Download Share
<1%
Google Play
App Downloads
2.73b
Game Downloads
1.78m

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 1.50% of app downloads within the user authentication SDK category.

Total Apps
1.28k
Google Play
App Share
<1%
Google Play
Apps
1.22k
Games
66
Total Downloads
7.20b
Google Play
Download Share
1.50%
Google Play
App Downloads
7.08b
Game Downloads
122.68m

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
1.22k
Google Play
App Share
<1%
Google Play
Apps
1.21k
Games
18
Total Downloads
1.84b
Google Play
Download Share
<1%
Google Play
App Downloads
1.81b
Game Downloads
34.54m

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
1.14k
Google Play
App Share
<1%
Google Play
Apps
1.13k
Games
6
Total Downloads
1.94b
Google Play
Download Share
<1%
Google Play
App Downloads
1.94b
Game Downloads
850.73k

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
1.13k
Google Play
App Share
<1%
Google Play
Apps
1.13k
Games
0
Total Downloads
670.64m
Google Play
Download Share
<1%
Google Play
App Downloads
670.63m
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
713
Google Play
App Share
<1%
Google Play
Apps
697
Games
16
Total Downloads
1.60b
Google Play
Download Share
<1%
Google Play
App Downloads
1.60b
Game Downloads
3.21m

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
653
Google Play
App Share
<1%
Google Play
Apps
653
Games
0
Total Downloads
182.42m
Google Play
Download Share
<1%
Google Play
App Downloads
182.26m
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 OneSpan Vasco Digipass. This accounts for <1% of app downloads within the user authentication SDK category.

Total Apps
513
Google Play
App Share
<1%
Google Play
Apps
513
Games
0
Total Downloads
389.06m
Google Play
Download Share
<1%
Google Play
App Downloads
389.06m
Game Downloads
0

Use the 42matters SDK Explorer to find all apps that use OneSpan Vasco Digipass.

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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.