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Top 20 User Authentication SDKs Used in Android Apps on Google Play
Last update: 17 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, 73.78% have integrated Firebase Authentication. This accounts for 51.09% of app downloads within the user authentication SDK category.

Total Apps
375.77k
Google Play
App Share
73.78%
Google Play
Apps
350.54k
Games
25.23k
Total Downloads
462.03b
Google Play
Download Share
51.09%
Google Play
App Downloads
335.14b
Game Downloads
126.89b

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

Among all apps utilizing user authentication SDKs, 48.71% have integrated Google reCAPTCHA. This accounts for 30.58% of app downloads within the user authentication SDK category.

Total Apps
248.08k
Google Play
App Share
48.71%
Google Play
Apps
230.52k
Games
17.56k
Total Downloads
276.59b
Google Play
Download Share
30.58%
Google Play
App Downloads
189.24b
Game Downloads
87.35b

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

Among all apps utilizing user authentication SDKs, 8.38% have integrated Truecaller. This accounts for 3.93% of app downloads within the user authentication SDK category.

Total Apps
42.70k
Google Play
App Share
8.38%
Google Play
Apps
42.66k
Games
39
Total Downloads
35.51b
Google Play
Download Share
3.93%
Google Play
App Downloads
34.56b
Game Downloads
951.85m

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

Among all apps utilizing user authentication SDKs, 7.99% have integrated OTPless. This accounts for <1% of app downloads within the user authentication SDK category.

Total Apps
40.70k
Google Play
App Share
7.99%
Google Play
Apps
40.68k
Games
26
Total Downloads
3.60b
Google Play
Download Share
<1%
Google Play
App Downloads
3.45b
Game Downloads
147.00m

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

Among all apps utilizing user authentication SDKs, 7.30% have integrated AppAuth by OpenID. This accounts for 18.86% 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
37.20k
Google Play
App Share
7.30%
Google Play
Apps
36.90k
Games
304
Total Downloads
170.52b
Google Play
Download Share
18.86%
Google Play
App Downloads
168.04b
Game Downloads
2.48b

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

Among all apps utilizing user authentication SDKs, 5.83% have integrated Amazon AWS Cognito Federated Identities. This accounts for 7.42% of app downloads within the user authentication SDK category.

Total Apps
29.72k
Google Play
App Share
5.83%
Google Play
Apps
29.33k
Games
390
Total Downloads
67.10b
Google Play
Download Share
7.42%
Google Play
App Downloads
49.31b
Game Downloads
17.79b

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

Among all apps utilizing user authentication SDKs, 4.37% have integrated Auth0. This accounts for 6.72% 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
22.24k
Google Play
App Share
4.37%
Google Play
Apps
21.72k
Games
517
Total Downloads
60.74b
Google Play
Download Share
6.72%
Google Play
App Downloads
49.07b
Game Downloads
11.68b

Use the 42matters SDK Explorer to find all apps that use Auth0.

Among all apps utilizing user authentication SDKs, 1.84% have integrated FingerprintJS. This accounts for 1.47% of app downloads within the user authentication SDK category.

Total Apps
9.37k
Google Play
App Share
1.84%
Google Play
Apps
9.27k
Games
98
Total Downloads
13.31b
Google Play
Download Share
1.47%
Google Play
App Downloads
12.82b
Game Downloads
491.24m

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 7.50% of app downloads within the user authentication SDK category.

Total Apps
7.54k
Google Play
App Share
1.48%
Google Play
Apps
7.53k
Games
11
Total Downloads
67.82b
Google Play
Download Share
7.50%
Google Play
App Downloads
67.81b
Game Downloads
5.78m

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
3.51b
Google Play
Download Share
<1%
Google Play
App Downloads
3.51b
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
3.94k
Google Play
App Share
<1%
Google Play
Apps
3.94k
Games
2
Total Downloads
1.08b
Google Play
Download Share
<1%
Google Play
App Downloads
1.08b
Game Downloads
331.94k

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 3.86% 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
2.31k
Google Play
App Share
<1%
Google Play
Apps
1.80k
Games
513
Total Downloads
34.93b
Google Play
Download Share
3.86%
Google Play
App Downloads
30.70b
Game Downloads
4.23b

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
1.70k
Google Play
App Share
<1%
Google Play
Apps
1.70k
Games
6
Total Downloads
5.09b
Google Play
Download Share
<1%
Google Play
App Downloads
5.08b
Game Downloads
3.22m

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 1.53% of app downloads within the user authentication SDK category.

Total Apps
1.28k
Google Play
App Share
<1%
Google Play
Apps
1.21k
Games
71
Total Downloads
13.88b
Google Play
Download Share
1.53%
Google Play
App Downloads
13.68b
Game Downloads
200.21m

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
1.23k
Google Play
App Share
<1%
Google Play
Apps
1.21k
Games
18
Total Downloads
3.39b
Google Play
Download Share
<1%
Google Play
App Downloads
3.33b
Game Downloads
56.38m

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
1.15k
Google Play
App Share
<1%
Google Play
Apps
1.15k
Games
0
Total Downloads
1.23b
Google Play
Download Share
<1%
Google Play
App Downloads
1.23b
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
1.13k
Google Play
App Share
<1%
Google Play
Apps
1.13k
Games
6
Total Downloads
3.74b
Google Play
Download Share
<1%
Google Play
App Downloads
3.74b
Game Downloads
923.99k

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
708
Google Play
App Share
<1%
Google Play
Apps
692
Games
16
Total Downloads
3.08b
Google Play
Download Share
<1%
Google Play
App Downloads
3.07b
Game Downloads
5.48m

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
656
Google Play
App Share
<1%
Google Play
Apps
656
Games
0
Total Downloads
326.30m
Google Play
Download Share
<1%
Google Play
App Downloads
326.13m
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
512
Google Play
App Share
<1%
Google Play
Apps
512
Games
0
Total Downloads
697.32m
Google Play
Download Share
<1%
Google Play
App Downloads
697.32m
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.