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Top 20 User Authentication SDKs Used in Android Apps on Google Play
Last update: 18 Mar 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, 73.64% have integrated Firebase Authentication. This accounts for 53.23% of app downloads within the user authentication SDK category.

Total Apps
368.04k
Google Play
App Share
73.64%
Google Play
Apps
343.58k
Games
24.46k
Total Downloads
244.35b
Google Play
Download Share
53.23%
Google Play
App Downloads
175.95b
Game Downloads
68.41b

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

Among all apps utilizing user authentication SDKs, 47.91% have integrated Google reCAPTCHA. This accounts for 29.81% of app downloads within the user authentication SDK category.

Total Apps
239.45k
Google Play
App Share
47.91%
Google Play
Apps
222.66k
Games
16.79k
Total Downloads
136.84b
Google Play
Download Share
29.81%
Google Play
App Downloads
93.75b
Game Downloads
43.08b

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

Among all apps utilizing user authentication SDKs, 8.56% have integrated Truecaller. This accounts for 3.85% of app downloads within the user authentication SDK category.

Total Apps
42.76k
Google Play
App Share
8.56%
Google Play
Apps
42.72k
Games
42
Total Downloads
17.67b
Google Play
Download Share
3.85%
Google Play
App Downloads
17.13b
Game Downloads
539.56m

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

Among all apps utilizing user authentication SDKs, 8.15% have integrated OTPless. This accounts for <1% of app downloads within the user authentication SDK category.

Total Apps
40.75k
Google Play
App Share
8.15%
Google Play
Apps
40.73k
Games
26
Total Downloads
1.80b
Google Play
Download Share
<1%
Google Play
App Downloads
1.73b
Game Downloads
72.43m

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

Among all apps utilizing user authentication SDKs, 7.35% have integrated AppAuth by OpenID. This accounts for 16.78% 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
36.74k
Google Play
App Share
7.35%
Google Play
Apps
36.44k
Games
304
Total Downloads
77.02b
Google Play
Download Share
16.78%
Google Play
App Downloads
75.73b
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, 5.95% have integrated Amazon AWS Cognito Federated Identities. This accounts for 7.87% of app downloads within the user authentication SDK category.

Total Apps
29.73k
Google Play
App Share
5.95%
Google Play
Apps
29.34k
Games
388
Total Downloads
36.14b
Google Play
Download Share
7.87%
Google Play
App Downloads
26.51b
Game Downloads
9.63b

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

Among all apps utilizing user authentication SDKs, 4.30% have integrated Auth0. This accounts for 6.56% 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
21.48k
Google Play
App Share
4.30%
Google Play
Apps
20.98k
Games
500
Total Downloads
30.10b
Google Play
Download Share
6.56%
Google Play
App Downloads
24.43b
Game Downloads
5.67b

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

Among all apps utilizing user authentication SDKs, 1.86% have integrated FingerprintJS. This accounts for 1.36% of app downloads within the user authentication SDK category.

Total Apps
9.30k
Google Play
App Share
1.86%
Google Play
Apps
9.20k
Games
96
Total Downloads
6.26b
Google Play
Download Share
1.36%
Google Play
App Downloads
6.01b
Game Downloads
252.10m

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 7.61% of app downloads within the user authentication SDK category.

Total Apps
7.38k
Google Play
App Share
1.48%
Google Play
Apps
7.37k
Games
11
Total Downloads
34.95b
Google Play
Download Share
7.61%
Google Play
App Downloads
34.95b
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
4.37k
Google Play
App Share
<1%
Google Play
Apps
4.37k
Games
0
Total Downloads
1.76b
Google Play
Download Share
<1%
Google Play
App Downloads
1.76b
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
3.96k
Games
2
Total Downloads
698.62m
Google Play
Download Share
<1%
Google Play
App Downloads
698.30m
Game Downloads
316.68k

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 4.13% 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
2.23k
Google Play
App Share
<1%
Google Play
Apps
1.79k
Games
436
Total Downloads
18.98b
Google Play
Download Share
4.13%
Google Play
App Downloads
16.57b
Game Downloads
2.41b

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
2.63b
Google Play
Download Share
<1%
Google Play
App Downloads
2.63b
Game Downloads
1.73m

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
1.20k
Games
50
Total Downloads
6.74b
Google Play
Download Share
1.47%
Google Play
App Downloads
6.60b
Game Downloads
135.58m

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
1.20k
Google Play
App Share
<1%
Google Play
Apps
1.18k
Games
18
Total Downloads
1.77b
Google Play
Download Share
<1%
Google Play
App Downloads
1.73b
Game Downloads
33.81m

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
1.13k
Google Play
App Share
<1%
Google Play
Apps
1.12k
Games
6
Total Downloads
1.90b
Google Play
Download Share
<1%
Google Play
App Downloads
1.89b
Game Downloads
774.66k

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
1.07k
Google Play
App Share
<1%
Google Play
Apps
1.07k
Games
0
Total Downloads
635.14m
Google Play
Download Share
<1%
Google Play
App Downloads
635.13m
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
720
Google Play
App Share
<1%
Google Play
Apps
704
Games
16
Total Downloads
1.53b
Google Play
Download Share
<1%
Google Play
App Downloads
1.53b
Game Downloads
2.98m

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
646
Google Play
App Share
<1%
Google Play
Apps
646
Games
0
Total Downloads
173.73m
Google Play
Download Share
<1%
Google Play
App Downloads
173.56m
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
517
Google Play
App Share
<1%
Google Play
Apps
511
Games
6
Total Downloads
673.67m
Google Play
Download Share
<1%
Google Play
App Downloads
672.82m
Game Downloads
853.28k

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.