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Top 20 User Authentication SDKs Used in Android Apps on Google Play
Last update: 8 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, 73.86% have integrated Firebase Authentication. This accounts for 53.84% of app downloads within the user authentication SDK category.

Total Apps
354.34k
Google Play
App Share
73.86%
Google Play
Apps
331.41k
Games
22.93k
Total Downloads
239.82b
Google Play
Download Share
53.84%
Google Play
App Downloads
172.85b
Game Downloads
66.97b

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

Among all apps utilizing user authentication SDKs, 45.83% have integrated Google reCAPTCHA. This accounts for 28.50% of app downloads within the user authentication SDK category.

Total Apps
219.85k
Google Play
App Share
45.83%
Google Play
Apps
204.50k
Games
15.34k
Total Downloads
126.94b
Google Play
Download Share
28.50%
Google Play
App Downloads
86.12b
Game Downloads
40.82b

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

Among all apps utilizing user authentication SDKs, 8.91% have integrated Truecaller. This accounts for 3.88% of app downloads within the user authentication SDK category.

Total Apps
42.76k
Google Play
App Share
8.91%
Google Play
Apps
42.71k
Games
43
Total Downloads
17.26b
Google Play
Download Share
3.88%
Google Play
App Downloads
16.76b
Game Downloads
508.77m

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

Among all apps utilizing user authentication SDKs, 8.51% have integrated OTPless. This accounts for <1% of app downloads within the user authentication SDK category.

Total Apps
40.82k
Google Play
App Share
8.51%
Google Play
Apps
40.80k
Games
24
Total Downloads
1.80b
Google Play
Download Share
<1%
Google Play
App Downloads
1.73b
Game Downloads
70.97m

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

Among all apps utilizing user authentication SDKs, 7.42% have integrated AppAuth by OpenID. This accounts for 16.93% 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
35.59k
Google Play
App Share
7.42%
Google Play
Apps
35.28k
Games
307
Total Downloads
75.39b
Google Play
Download Share
16.93%
Google Play
App Downloads
74.12b
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, 6.19% have integrated Amazon AWS Cognito Federated Identities. This accounts for 7.96% of app downloads within the user authentication SDK category.

Total Apps
29.68k
Google Play
App Share
6.19%
Google Play
Apps
29.32k
Games
356
Total Downloads
35.44b
Google Play
Download Share
7.96%
Google Play
App Downloads
26.26b
Game Downloads
9.19b

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 6.11% 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
20.31k
Google Play
App Share
4.23%
Google Play
Apps
19.83k
Games
486
Total Downloads
27.20b
Google Play
Download Share
6.11%
Google Play
App Downloads
21.62b
Game Downloads
5.57b

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 1.28% of app downloads within the user authentication SDK category.

Total Apps
9.06k
Google Play
App Share
1.89%
Google Play
Apps
8.98k
Games
87
Total Downloads
5.69b
Google Play
Download Share
1.28%
Google Play
App Downloads
5.45b
Game Downloads
244.14m

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

Among all apps utilizing user authentication SDKs, 1.39% have integrated Microsoft Authentication Library. This accounts for 7.68% of app downloads within the user authentication SDK category.

Total Apps
6.67k
Google Play
App Share
1.39%
Google Play
Apps
6.66k
Games
10
Total Downloads
34.19b
Google Play
Download Share
7.68%
Google Play
App Downloads
34.19b
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
4.41k
Google Play
App Share
<1%
Google Play
Apps
4.41k
Games
1
Total Downloads
1.74b
Google Play
Download Share
<1%
Google Play
App Downloads
1.73b
Game Downloads
894.77k

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
3.97k
Google Play
App Share
<1%
Google Play
Apps
3.96k
Games
2
Total Downloads
686.12m
Google Play
Download Share
<1%
Google Play
App Downloads
685.81m
Game Downloads
303.32k

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 4.22% 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
2.26k
Google Play
App Share
<1%
Google Play
Apps
1.80k
Games
453
Total Downloads
18.81b
Google Play
Download Share
4.22%
Google Play
App Downloads
16.45b
Game Downloads
2.36b

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
1.75k
Games
6
Total Downloads
2.62b
Google Play
Download Share
<1%
Google Play
App Downloads
2.62b
Game Downloads
1.68m

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
1.25k
Google Play
App Share
<1%
Google Play
Apps
1.15k
Games
106
Total Downloads
6.55b
Google Play
Download Share
1.47%
Google Play
App Downloads
6.42b
Game Downloads
132.07m

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
1.12k
Google Play
App Share
<1%
Google Play
Apps
1.11k
Games
15
Total Downloads
1.73b
Google Play
Download Share
<1%
Google Play
App Downloads
1.69b
Game Downloads
33.61m

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
1.01k
Google Play
App Share
<1%
Google Play
Apps
1.01k
Games
0
Total Downloads
620.24m
Google Play
Download Share
<1%
Google Play
App Downloads
620.23m
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
1.01k
Google Play
App Share
<1%
Google Play
Apps
1.00k
Games
6
Total Downloads
1.72b
Google Play
Download Share
<1%
Google Play
App Downloads
1.72b
Game Downloads
697.74k

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
703
Google Play
App Share
<1%
Google Play
Apps
687
Games
16
Total Downloads
1.49b
Google Play
Download Share
<1%
Google Play
App Downloads
1.48b
Game Downloads
2.87m

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
637
Google Play
App Share
<1%
Google Play
Apps
637
Games
0
Total Downloads
170.32m
Google Play
Download Share
<1%
Google Play
App Downloads
170.15m
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
550
Google Play
App Share
<1%
Google Play
Apps
544
Games
6
Total Downloads
722.59m
Google Play
Download Share
<1%
Google Play
App Downloads
721.75m
Game Downloads
845.43k

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.