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Top 20 User Authentication SDKs Used in Android Apps on Google Play
Last update: 27 Nov 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, 74.26% have integrated Firebase Authentication. This accounts for 54.01% of app downloads within the user authentication SDK category.

Total Apps
345.77k
Google Play
App Share
74.26%
Google Play
Apps
323.44k
Games
22.33k
Total Downloads
238.11b
Google Play
Download Share
54.01%
Google Play
App Downloads
170.75b
Game Downloads
67.36b

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

Among all apps utilizing user authentication SDKs, 44.41% have integrated Google reCAPTCHA. This accounts for 28.09% of app downloads within the user authentication SDK category.

Total Apps
206.75k
Google Play
App Share
44.41%
Google Play
Apps
192.08k
Games
14.67k
Total Downloads
123.85b
Google Play
Download Share
28.09%
Google Play
App Downloads
83.81b
Game Downloads
40.04b

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

Among all apps utilizing user authentication SDKs, 9.17% have integrated Truecaller. This accounts for 4.01% of app downloads within the user authentication SDK category.

Total Apps
42.70k
Google Play
App Share
9.17%
Google Play
Apps
42.66k
Games
43
Total Downloads
17.66b
Google Play
Download Share
4.01%
Google Play
App Downloads
17.24b
Game Downloads
419.54m

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

Among all apps utilizing user authentication SDKs, 8.76% have integrated OTPless. This accounts for <1% of app downloads within the user authentication SDK category.

Total Apps
40.78k
Google Play
App Share
8.76%
Google Play
Apps
40.76k
Games
25
Total Downloads
1.80b
Google Play
Download Share
<1%
Google Play
App Downloads
1.73b
Game Downloads
70.09m

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 16.83% 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
34.51k
Google Play
App Share
7.41%
Google Play
Apps
34.20k
Games
307
Total Downloads
74.22b
Google Play
Download Share
16.83%
Google Play
App Downloads
72.93b
Game Downloads
1.29b

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

Among all apps utilizing user authentication SDKs, 6.36% have integrated Amazon AWS Cognito Federated Identities. This accounts for 7.98% of app downloads within the user authentication SDK category.

Total Apps
29.63k
Google Play
App Share
6.36%
Google Play
Apps
29.29k
Games
344
Total Downloads
35.16b
Google Play
Download Share
7.98%
Google Play
App Downloads
26.08b
Game Downloads
9.08b

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 6.03% 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
19.69k
Google Play
App Share
4.23%
Google Play
Apps
19.24k
Games
447
Total Downloads
26.57b
Google Play
Download Share
6.03%
Google Play
App Downloads
21.09b
Game Downloads
5.48b

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 1.30% of app downloads within the user authentication SDK category.

Total Apps
8.80k
Google Play
App Share
1.89%
Google Play
Apps
8.72k
Games
82
Total Downloads
5.73b
Google Play
Download Share
1.30%
Google Play
App Downloads
5.49b
Game Downloads
247.31m

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

Among all apps utilizing user authentication SDKs, 1.43% have integrated Microsoft Authentication Library. This accounts for 7.66% of app downloads within the user authentication SDK category.

Total Apps
6.64k
Google Play
App Share
1.43%
Google Play
Apps
6.63k
Games
10
Total Downloads
33.76b
Google Play
Download Share
7.66%
Google Play
App Downloads
33.76b
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
4.43k
Games
1
Total Downloads
1.72b
Google Play
Download Share
<1%
Google Play
App Downloads
1.72b
Game Downloads
860.59k

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
3.80k
Google Play
App Share
<1%
Google Play
Apps
3.80k
Games
2
Total Downloads
687.53m
Google Play
Download Share
<1%
Google Play
App Downloads
687.23m
Game Downloads
295.85k

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 4.17% 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
2.13k
Google Play
App Share
<1%
Google Play
Apps
1.78k
Games
343
Total Downloads
18.39b
Google Play
Download Share
4.17%
Google Play
App Downloads
16.02b
Game Downloads
2.38b

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
1.80k
Google Play
App Share
<1%
Google Play
Apps
1.80k
Games
4
Total Downloads
2.63b
Google Play
Download Share
<1%
Google Play
App Downloads
2.63b
Game Downloads
1.66m

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
104
Total Downloads
6.16b
Google Play
Download Share
1.40%
Google Play
App Downloads
6.03b
Game Downloads
124.78m

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
1.09k
Google Play
App Share
<1%
Google Play
Apps
1.07k
Games
15
Total Downloads
1.70b
Google Play
Download Share
<1%
Google Play
App Downloads
1.66b
Game Downloads
33.48m

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
1.01k
Google Play
App Share
<1%
Google Play
Apps
1.00k
Games
4
Total Downloads
1.66b
Google Play
Download Share
<1%
Google Play
App Downloads
1.66b
Game Downloads
658.29k

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
983
Google Play
App Share
<1%
Google Play
Apps
983
Games
0
Total Downloads
590.65m
Google Play
Download Share
<1%
Google Play
App Downloads
590.63m
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
708
Google Play
App Share
<1%
Google Play
Apps
693
Games
15
Total Downloads
1.47b
Google Play
Download Share
<1%
Google Play
App Downloads
1.46b
Game Downloads
2.79m

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
638
Google Play
App Share
<1%
Google Play
Apps
638
Games
0
Total Downloads
168.18m
Google Play
Download Share
<1%
Google Play
App Downloads
168.01m
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
559
Google Play
App Share
<1%
Google Play
Apps
553
Games
6
Total Downloads
710.49m
Google Play
Download Share
<1%
Google Play
App Downloads
709.65m
Game Downloads
840.35k

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.