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Top 20 User Authentication SDKs Used in Android Apps on Google Play
Last update: 12 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, 74.11% have integrated Firebase Authentication. This accounts for 53.95% of app downloads within the user authentication SDK category.

Total Apps
348.22k
Google Play
App Share
74.11%
Google Play
Apps
325.72k
Games
22.49k
Total Downloads
238.57b
Google Play
Download Share
53.95%
Google Play
App Downloads
171.69b
Game Downloads
66.88b

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

Among all apps utilizing user authentication SDKs, 44.87% have integrated Google reCAPTCHA. This accounts for 28.30% of app downloads within the user authentication SDK category.

Total Apps
210.84k
Google Play
App Share
44.87%
Google Play
Apps
196.00k
Games
14.85k
Total Downloads
125.15b
Google Play
Download Share
28.30%
Google Play
App Downloads
84.80b
Game Downloads
40.34b

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

Among all apps utilizing user authentication SDKs, 9.10% have integrated Truecaller. This accounts for 4.03% of app downloads within the user authentication SDK category.

Total Apps
42.75k
Google Play
App Share
9.10%
Google Play
Apps
42.71k
Games
43
Total Downloads
17.84b
Google Play
Download Share
4.03%
Google Play
App Downloads
17.34b
Game Downloads
503.51m

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

Among all apps utilizing user authentication SDKs, 8.68% have integrated OTPless. This accounts for <1% of app downloads within the user authentication SDK category.

Total Apps
40.80k
Google Play
App Share
8.68%
Google Play
Apps
40.77k
Games
24
Total Downloads
1.79b
Google Play
Download Share
<1%
Google Play
App Downloads
1.72b
Game Downloads
70.33m

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 16.87% 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
34.82k
Google Play
App Share
7.41%
Google Play
Apps
34.51k
Games
308
Total Downloads
74.59b
Google Play
Download Share
16.87%
Google Play
App Downloads
73.33b
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, 6.30% have integrated Amazon AWS Cognito Federated Identities. This accounts for 7.95% of app downloads within the user authentication SDK category.

Total Apps
29.62k
Google Play
App Share
6.30%
Google Play
Apps
29.27k
Games
352
Total Downloads
35.15b
Google Play
Download Share
7.95%
Google Play
App Downloads
26.06b
Game Downloads
9.09b

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 6.07% 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
19.88k
Google Play
App Share
4.23%
Google Play
Apps
19.41k
Games
471
Total Downloads
26.83b
Google Play
Download Share
6.07%
Google Play
App Downloads
21.32b
Game Downloads
5.51b

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 1.26% of app downloads within the user authentication SDK category.

Total Apps
8.89k
Google Play
App Share
1.89%
Google Play
Apps
8.80k
Games
83
Total Downloads
5.57b
Google Play
Download Share
1.26%
Google Play
App Downloads
5.33b
Game Downloads
242.78m

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

Among all apps utilizing user authentication SDKs, 1.41% have integrated Microsoft Authentication Library. This accounts for 7.66% of app downloads within the user authentication SDK category.

Total Apps
6.65k
Google Play
App Share
1.41%
Google Play
Apps
6.64k
Games
10
Total Downloads
33.90b
Google Play
Download Share
7.66%
Google Play
App Downloads
33.89b
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
4.43k
Google Play
App Share
<1%
Google Play
Apps
4.42k
Games
1
Total Downloads
1.72b
Google Play
Download Share
<1%
Google Play
App Downloads
1.72b
Game Downloads
871.25k

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
3.87k
Google Play
App Share
<1%
Google Play
Apps
3.87k
Games
2
Total Downloads
687.17m
Google Play
Download Share
<1%
Google Play
App Downloads
686.88m
Game Downloads
297.73k

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 4.18% 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
2.16k
Google Play
App Share
<1%
Google Play
Apps
1.79k
Games
371
Total Downloads
18.50b
Google Play
Download Share
4.18%
Google Play
App Downloads
16.09b
Game Downloads
2.40b

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
1.78k
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 1.40% of app downloads within the user authentication SDK category.

Total Apps
1.24k
Google Play
App Share
<1%
Google Play
Apps
1.14k
Games
106
Total Downloads
6.21b
Google Play
Download Share
1.40%
Google Play
App Downloads
6.08b
Game Downloads
129.70m

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
1.67b
Game Downloads
33.52m

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
992
Google Play
App Share
<1%
Google Play
Apps
992
Games
0
Total Downloads
611.53m
Google Play
Download Share
<1%
Google Play
App Downloads
611.51m
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
992
Google Play
App Share
<1%
Google Play
Apps
988
Games
4
Total Downloads
1.68b
Google Play
Download Share
<1%
Google Play
App Downloads
1.68b
Game Downloads
670.62k

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
706
Google Play
App Share
<1%
Google Play
Apps
691
Games
15
Total Downloads
1.48b
Google Play
Download Share
<1%
Google Play
App Downloads
1.47b
Game Downloads
2.82m

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
640
Google Play
App Share
<1%
Google Play
Apps
640
Games
0
Total Downloads
169.05m
Google Play
Download Share
<1%
Google Play
App Downloads
168.88m
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
562
Google Play
App Share
<1%
Google Play
Apps
556
Games
6
Total Downloads
713.02m
Google Play
Download Share
<1%
Google Play
App Downloads
712.17m
Game Downloads
841.82k

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.