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HackerRank VS rrweb

Compare HackerRank VS rrweb and see what are their differences

HackerRank

HackerRank is a platform that allows companies to conduct interviews remotely to hire developers and for technical assessment purposes.

Rating
0 reviews
Alternatives Is it good?
rrweb

#1 open source session recording & replay library

Rating
0 reviews
Pricing
Open source Freemium Free trial
Alternatives Is it good?
Measure.sh
Measure helps mobile teams monitor and fix crashes, ANRs, bugs, and performance issues. The open source alternative to Firebase Crashlytics. sponsored
Note: These products don't have any matching categories. If you think this is a mistake, please edit the details of one of the products and suggest appropriate categories.

Which is more popular?

Based on our record, HackerRank seems to be more popular. It has been mentioned 67 times since March 2021.

social mentions
67 vs 0
Hiring And Recruitment popularity
100% vs 0%
alternatives listed
240+ vs 112

Base details

Website, pricing, platforms and company facts side by side.

HackerRank
rrweb
Website hackerrank.com rrweb.com
Pricing —
Open source Freemium Free trial Official pricing
Listed in
Hiring And Recruitment Online Learning Online Education Skill Assessment +1
Heatmaps Web Analytics User Monitoring User Experience Session Recording And Playback Session Recording +3

About HackerRank and rrweb

In their own words, as submitted to SaaSHub.

HackerRank
rrweb

No description of HackerRank yet.

Embeddable session replay infrastructure on the open source library the industry standardized on. Record and replay sessions inside your own product, through an unbranded SDK and API.

Read more about rrweb

Features and specs

What each product offers, as listed by its team.

HackerRank 7 features
rrweb 5 features
  • Skill Assessment
    HackerRank provides a structured way to assess coding skills through a wide range of programming challenges and problems.
  • Wide Range of Languages
    Supports numerous programming languages, making it versatile for users with different preferences and expertise.
  • Interview Preparation
    Offers various interview preparation kits and company-specific challenges to help candidates prepare for job interviews.
  • Community and Collaboration
    A community of coders where users can discuss problems, share solutions, and collaborate on coding projects.
  • Company Recruitments
    Many companies use HackerRank for recruitment, and performing well on the platform can lead to job opportunities.
  • Leaderboard and Gamification
    Features like leaderboards and gamification elements motivate users to improve their rankings and skills continuously.
  • Educational Resources
    Provides tutorials and explanations that help users understand algorithms and data structures better.

Possible disadvantages

  • Steep Learning Curve
    Beginners may find some problems too challenging, which can be discouraging if they lack foundational knowledge.
  • Potential Focus on Competitive Programming
    The platform may emphasize competitive programming skills, which are not always directly applicable to all real-world software development scenarios.
  • Quality Variance in Problems
    The quality and difficulty of problems can vary, which may affect the consistency of the learning experience.
  • Limited Real-World Project Experience
    The focus on algorithms and coding challenges means there's less emphasis on full-scale project development experience.
  • Limited Feedback
    Automated grading provides limited feedback, which may not be enough for users to understand their mistakes fully.
  • Subscription Costs
    Access to some premium content and features requires a subscription, which may not be affordable for all users.
  • Network Dependency
    Requires a good internet connection to participate in coding challenges and access resources, which may be a limitation for some users.
  • Full Video Recording Capability
    rrweb can record and replay the whole web app experience through videos, allowing for comprehensive playback of user interactions.
  • High Fidelity Replays
    It captures almost all kinds of interactions and DOM state changes, offering very accurate reproduction of user sessions.
  • Event Compression
    The tool employs efficient event compression techniques, reducing the size of data files while maintaining detailed interactions.
  • Modular Architecture
    Its modular architecture allows developers to customize and extend functionalities according to specific needs by adding or removing plugins.
  • Open Source
    rrweb is open source, making it accessible for anyone to use, modify, or contribute to, which fosters a collaborative development environment.

Analysis

An editorial look at what each product does well and who it suits.

HackerRank
rrweb

Overall verdict

  • Yes, HackerRank is generally considered a good platform for improving coding skills and preparing for technical interviews. It is widely used by developers to hone their coding abilities and by companies to assess candidates' coding proficiency.

Why this product is good

  • HackerRank is a popular platform for coding enthusiasts, offering a wide range of programming challenges and competitions. It stands out for its extensive problem library, which is beneficial for practice and learning. The platform supports multiple programming languages and provides detailed feedback on submissions, making it a valuable tool for both beginners and experienced programmers.

Recommended for

    HackerRank is recommended for students, individual learners, and job seekers looking to improve their coding skills, as well as for companies seeking an efficient way to evaluate candidates' technical abilities during the hiring process.

No analysis of rrweb yet.

Videos

Walkthroughs and reviews on video.

HackerRank 3 videos + Add
rrweb 0 videos + Add

Is HackerRank A Good Idea?

More videos

  • - LeetCode vs HackerRank
  • - Difference between HackerRank, LeetCode, topcoder and Codeforces

No rrweb videos yet. You could help us improve this page by suggesting one.

Category popularity

How often each product is chosen within a category, 0–100% relative to the other.

Score bands 0–20 21–40 41–50 51–60 61–100
HackerRank
rrweb
100% 100%
Hiring And Recruitment
0% 0%
0% 0%
Web Analytics
100% 100%
100% 100%
Online Learning
0% 0%
0% 0%
Heatmaps
100% 100%

Questions & Answers

As answered by people managing HackerRank and rrweb.

Why should a person choose your product over its competitors?

rrweb's answer:

Most session replay vendors are building on the engine we maintain. Choosing rrweb means owning that layer directly.

What that gets you in practice: events are plain JSON, so you store them in your own S3, Postgres or stream, keep them in the EU, and delete them on your own schedule. There's no lock-in at the recorder, because if you leave rrweb Cloud your recordings still replay in an open source player. And the plugin API lets you capture things a closed SaaS recorder will never expose, including canvas, WebGL and custom event types.

Where a competitor wins: if you want replay bundled with product analytics, error monitoring and heatmaps in one dashboard, and you never want to think about infrastructure, a full suite like PostHog or Sentry does more out of the box. Several of them sponsor rrweb, and we'd rather people use the right tool than the closest one.

How would you describe the primary audience of your product?

rrweb's answer:

Two groups.

Product engineers who need replay inside something they're already building: bug reporting, customer support tooling, QA, AI agent observability, interactive demos. They install the library, own the pipeline, and want format-level control.

Platform teams at companies whose product is replay, or includes it. Observability vendors, analytics suites, co-browsing and customer experience tools. They embed rrweb as the capture layer instead of writing a recorder from scratch, which takes years to get right across browsers, shadow DOM, canvas, iframes and web components.

What's the story behind your product?

rrweb's answer:

rrweb started in 2018 as one engineer's side project. Yanzhen Yu wanted to record and replay what users actually did in a browser, and published the result under MIT. There's a short documentary about how it came together, in Chinese with English subtitles.

Adoption moved faster than anyone planned for. A core team formed around the project in 2020, and Justin Halsall (Amsterdam), Eoghan Murray (Dublin) and Yun Feng (San Francisco) maintain it today alongside more than 100 contributors. The library now sits at close to 20,000 stars and powers the replay features inside some of the largest observability and analytics products on the market.

The awkward part of that success is that an MIT library carrying replay for billion-dollar companies was still being maintained on evenings and weekends. rrweb Cloud exists to fix that. It's the hosted version of the project, built by the maintainers, based in Amsterdam, and the logic is simple: revenue from Cloud pays for maintainer time on the open source library.

Which are the primary technologies used for building your product?

rrweb's answer:

The library is roughly 89% TypeScript, deliberately so. Record and replay share a strongly typed event schema, and those types are the contract between the two sides. The remainder is JavaScript, HTML test fixtures, and Svelte for the player UI.

Four packages:

rrweb-snapshot, which serializes the DOM and its state into a JSON tree and rebuilds it rrweb, the record and replay functions rrdom, a virtual DOM that makes replay faster and testable headlessly rrweb-player, the player UI

Underneath it leans on browser primitives: MutationObserver for DOM changes, event listeners for input, scroll and pointer activity, CSSOM for stylesheet state, and patched canvas contexts for 2D and WebGL capture. Events are plain JSON, optionally packed for transport.

Build and test tooling is Yarn, Turborepo, Vite, Vitest, Puppeteer for integration tests, and Changesets for releases. MIT licensed throughout.

Who are some of the biggest customers of your product?

rrweb's answer:

Sentry Datadog PostHog Amplitude Mixpanel New Relic Pendo Highlight Browserbase StatCounter Requestly Gleap Bird Eats Bug Navattic CUX UXWizz Analyzee SmartX

Sentry, PostHog, Pendo and Highlight also fund the project as sponsors on OpenCollective.

What makes your product unique?

rrweb's answer:

rrweb is the recording engine most session replay products are built on. Sentry, PostHog, Pendo, Highlight, Mixpanel, Datadog, Amplitude and New Relic all ship replay built on rrweb or its approach.

It serializes the DOM into a typed JSON event stream: one full snapshot, then timestamped incremental mutations. There is no video. Replay rebuilds the actual page in a browser, so text stays selectable, CSS re-renders at any viewport, and a three-minute session weighs kilobytes instead of megabytes. Because the output is structured JSON, an LLM can read a session directly without a vision model in the loop.

It's MIT licensed with close to 20,000 GitHub stars, so the capture layer is yours to own. rrweb Cloud is the hosted backend from the same maintainers, for teams who don't want to run ingestion, storage and replay infrastructure themselves.

User comments

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Reviews and articles

External articles and on-site reviews we used to compare the two products.

HackerRank no reviews yet
rrweb no reviews yet

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Social recommendations and mentions

Recommendations tracked on public social media and blogs since March 2021.

HackerRank 67 mentions
rrweb 0 mentions
  • How to Stop Getting Lost in Endless Resources and Stay Focused as a Developer
    This way, you transfer what you already know (problem-solving) but only change the syntax. Platforms like Hackerrank are also great to solve the same problem in different languages and learn from other people’s solutions. - Source: dev.to / about 1 year ago
  • Pick up new languages faster this way!
    Firstly, solve some common data structure problems with it. Implement some data structures like arrays, linked lists, stacks, queues, etc. You can check common problems on LeetCode, Hackerank or some other resources. - Source: dev.to / over 2 years ago
  • Offline alternative of hackerrank.com to practice coding offline
    I don't have a consecutive internet connection and I can't keep up learning process so I started practicing in hackerrank.com I have started some challenges in python and c++ there. Thus I have no internet connection so I cannot practice... Source: almost 3 years ago

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Tracking rrweb since Mar 2021.

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