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Top 20 User Authentication SDKs Used in Android Apps on Google Play
Last update: 7 Oct 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, 74.60% have integrated Firebase Authentication. This accounts for 54.49% of app downloads within the user authentication SDK category.

Total Apps
339.03k
Google Play
App Share
74.60%
Google Play
Apps
317.49k
Games
21.54k
Total Downloads
237.63b
Google Play
Download Share
54.49%
Google Play
App Downloads
169.36b
Game Downloads
68.27b

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

Among all apps utilizing user authentication SDKs, 42.59% have integrated Google reCAPTCHA. This accounts for 27.75% of app downloads within the user authentication SDK category.

Total Apps
193.57k
Google Play
App Share
42.59%
Google Play
Apps
179.83k
Games
13.74k
Total Downloads
121.00b
Google Play
Download Share
27.75%
Google Play
App Downloads
81.28b
Game Downloads
39.71b

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

Among all apps utilizing user authentication SDKs, 9.40% have integrated Truecaller. This accounts for 4.01% of app downloads within the user authentication SDK category.

Total Apps
42.73k
Google Play
App Share
9.40%
Google Play
Apps
42.68k
Games
43
Total Downloads
17.48b
Google Play
Download Share
4.01%
Google Play
App Downloads
17.11b
Game Downloads
369.53m

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

Among all apps utilizing user authentication SDKs, 9.00% have integrated OTPless. This accounts for <1% of app downloads within the user authentication SDK category.

Total Apps
40.89k
Google Play
App Share
9.00%
Google Play
Apps
40.87k
Games
24
Total Downloads
1.79b
Google Play
Download Share
<1%
Google Play
App Downloads
1.78b
Game Downloads
9.24m

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

Among all apps utilizing user authentication SDKs, 7.28% have integrated AppAuth by OpenID. This accounts for 16.74% 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
33.07k
Google Play
App Share
7.28%
Google Play
Apps
32.78k
Games
291
Total Downloads
73.02b
Google Play
Download Share
16.74%
Google Play
App Downloads
71.74b
Game Downloads
1.28b

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

Among all apps utilizing user authentication SDKs, 6.56% have integrated Amazon AWS Cognito Federated Identities. This accounts for 7.97% of app downloads within the user authentication SDK category.

Total Apps
29.81k
Google Play
App Share
6.56%
Google Play
Apps
29.47k
Games
345
Total Downloads
34.75b
Google Play
Download Share
7.97%
Google Play
App Downloads
25.75b
Game Downloads
9.00b

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

Among all apps utilizing user authentication SDKs, 4.15% have integrated Auth0. This accounts for 6.04% 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
18.85k
Google Play
App Share
4.15%
Google Play
Apps
18.46k
Games
396
Total Downloads
26.36b
Google Play
Download Share
6.04%
Google Play
App Downloads
20.88b
Game Downloads
5.49b

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

Among all apps utilizing user authentication SDKs, 1.42% have integrated Microsoft Authentication Library. This accounts for 7.61% of app downloads within the user authentication SDK category.

Total Apps
6.46k
Google Play
App Share
1.42%
Google Play
Apps
6.45k
Games
9
Total Downloads
33.19b
Google Play
Download Share
7.61%
Google Play
App Downloads
33.19b
Game Downloads
4.08m

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

Among all apps utilizing user authentication SDKs, 1.42% have integrated FingerprintJS. This accounts for 1.22% of app downloads within the user authentication SDK category.

Total Apps
6.46k
Google Play
App Share
1.42%
Google Play
Apps
6.38k
Games
81
Total Downloads
5.33b
Google Play
Download Share
1.22%
Google Play
App Downloads
5.14b
Game Downloads
185.44m

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

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
4.47k
Google Play
App Share
<1%
Google Play
Apps
4.47k
Games
1
Total Downloads
1.72b
Google Play
Download Share
<1%
Google Play
App Downloads
1.72b
Game Downloads
821.67k

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

Among all apps utilizing user authentication SDKs, <1% have integrated Signpost. This accounts for 4.23% 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
2.08k
Google Play
App Share
<1%
Google Play
Apps
1.79k
Games
289
Total Downloads
18.46b
Google Play
Download Share
4.23%
Google Play
App Downloads
15.67b
Game Downloads
2.79b

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
1.88k
Google Play
App Share
<1%
Google Play
Apps
1.87k
Games
3
Total Downloads
2.68b
Google Play
Download Share
<1%
Google Play
App Downloads
2.68b
Game Downloads
1.63m

Use the 42matters SDK Explorer to find all apps that use FraudForce by iovation.

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
1.42k
Google Play
App Share
<1%
Google Play
Apps
1.42k
Games
2
Total Downloads
702.61m
Google Play
Download Share
<1%
Google Play
App Downloads
702.32m
Game Downloads
286.46k

Use the 42matters SDK Explorer to find all apps that use Kount by Equifax.

Among all apps utilizing user authentication SDKs, <1% have integrated Facetec. This accounts for 1.29% of app downloads within the user authentication SDK category.

Total Apps
1.23k
Google Play
App Share
<1%
Google Play
Apps
1.13k
Games
97
Total Downloads
5.62b
Google Play
Download Share
1.29%
Google Play
App Downloads
5.51b
Game Downloads
116.28m

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
1.02k
Google Play
App Share
<1%
Google Play
Apps
1.01k
Games
15
Total Downloads
1.65b
Google Play
Download Share
<1%
Google Play
App Downloads
1.62b
Game Downloads
33.33m

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
971
Google Play
App Share
<1%
Google Play
Apps
968
Games
3
Total Downloads
1.43b
Google Play
Download Share
<1%
Google Play
App Downloads
1.43b
Game Downloads
611.45k

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
935
Google Play
App Share
<1%
Google Play
Apps
935
Games
0
Total Downloads
589.65m
Google Play
Download Share
<1%
Google Play
App Downloads
589.63m
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
704
Google Play
App Share
<1%
Google Play
Apps
687
Games
17
Total Downloads
1.43b
Google Play
Download Share
<1%
Google Play
App Downloads
1.42b
Game Downloads
2.96m

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
618
Google Play
App Share
<1%
Google Play
Apps
618
Games
0
Total Downloads
164.15m
Google Play
Download Share
<1%
Google Play
App Downloads
163.98m
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
577
Google Play
App Share
<1%
Google Play
Apps
571
Games
6
Total Downloads
702.60m
Google Play
Download Share
<1%
Google Play
App Downloads
701.77m
Game Downloads
833.04k

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.