
Mixpanel
Plausible.io
Amplitude
Google Analytics
Hotjar
Fathom Analytics
Microsoft Clarity
An open source suite of product and data tools including product analytics, feature flags, session replay, A/B testing, surveys, and more.

WolframAlpha
SpeedCrunch
Qalculate!
Numi App
Soulver
Symbolab
Wolfram Mathematica
fxSolver is an free online math solver, equation library, graphing calculator and science/engineering problem helper. To get started, add some formulas, fill in any input variables and press "Solve."
Which is more popular?
Based on our record, PostHog seems to be more popular. It has been mentioned 76 times since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | posthog.com | fxsolver.com |
| Pricing | — | |
| Company | Startup from the United States · 20 - 49 employees · 2020 | — |
| Listed in |
In their own words, as submitted to SaaSHub.


For developers just starting out, PostHog is a free way to understand how your product is being used, without having to send any data to 3rd parties. For enterprise customers, one data security becomes a key concern, or B2C businesses where using a SaaS solution is unaffordable, it's typical to...
Calculate multiple equations at once, Edit existing formulas and Create new ones, Compute large numbers of values, Plot graphs, Link your results, Solve full problems and Share worksheets with your friends. fxSolver is a free tool developed by a team of engineers and programmers with the sole...
What each product offers, as listed by its team.


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


Overall verdict
Why this product is good
Recommended for
PostHog is particularly well-suited for product teams, developers, and startups that require deep insights into user interactions and need the flexibility of a self-hosted solution. It is also a good fit for organizations that prioritize data privacy and want to maintain full control over their data.
Overall verdict
Why this product is good
Recommended for
Walkthroughs and reviews on video.
PostHog Walk Through
More videos
fxSolver Demo
How often each product is chosen within a category, 0–100% relative to the other.


Share your experience with using PostHog and fxSolver. For example, how are they different and which one is better?
External articles and on-site reviews we used to compare the two products.


According to BuiltWith, as of February 2024, PostHog is used on 5,169 (0.52%) of the top 1 million websites. Hotjar is used by 72,048 of the top 1 million websites. Typical PostHog users are engineers and product...
BlogBackSign inBlogThe 8 best free and open-source feature flag servicesPosted byThe best open-source feature flag tools1. PostHogWhat is PostHog?Supported librariesHow much does it cost?2. UnleashWhat is...
Recommendations tracked on public social media and blogs since March 2021.


Start-here: Will Google show the URL → Search Console (free). Who visited → GA4 (free standard). Product/errors → PostHog or Sentry. Is it up → UptimeRobot or Better Stack. - Source: dev.to / 7 days ago
Run eas integrations:posthog:connect and EAS CLI creates or links your PostHog project, installs the SDK and config plugin, and writes environment variables to your project and EAS. Every event PostHog captures now carries eas/update_id,... - Source: dev.to / about 1 month ago
That setup is now one command. It creates your PostHog org and project, installs the SDK, adds the config plugin, and writes your keys into .env.local and your EAS environment variables for Production, Preview, and Development. You pick... - Source: dev.to / about 1 month ago
Tracking fxSolver since Mar 2021.
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