Gallery of free git stats tools with screenshots & examples

By Bill Harding, Programmer/CEO
Published April 21, 2020

All the modern problems are born of abundance rather than scarcity, so said Naval Ravikant when waxing about our generation's unprecedented access to social media affirmation, distraction, and calorie-rich foods.

As it turns out, the modern oversupply of "too much good stuff" stretches down into the domain of the esoteric developer tools as well. The wealth of readily available git stats is unprecedented. But, as the adage goes, you get what you pay for, and shall we say, all of the git stats projects one finds on Github are very free. The purpose of this guide is to help separate wheat from chaff by giving examples and screenshots of the most popular git stats available in 2020.

When it comes to sourcing git stats, you have four good options to consider. We will order them by the amount of effort to get started, beginning with the easiest.

  1. Roll your own (with git command line). Use git's built-in faculties to see commits per author.
  2. Use your git provider or IDE's stats. If you're using GitHub, GitLab, Bitbucket, or Visual Studio, you have git stats available.
  3. Free GitClear trial. If you need metrics that are reliable enough to use for making decisions.
  4. Install a free tool. A collection of screenshots comparing the most popular free git stat tools.

First question: What do you hope to do with the stats?

Before choosing a git stat source, the right first question to ask is "How do I want to use these stats?" The four flavors of git stats vary by setup time and features, but a constant between them is that they are sourced from "commits" and "lines of code," which are dangerous sources to rely upon.

As is illustrated in this Lines of Code Breakdown, only about 5% of lines of code correspond to meaningful developer work. There's a reason that conventional wisdom is so down on using lines of code.

Commit count suffers from its own set of problems, including being trivial to game and not connected to any desirable outcome. The "commits" metric offers a clear reminder that availability != utility.

If you are hoping to get a stable, data-backed understanding of who is doing what in git repos, your best bet is to consider a free GitClear trial. GitClear has spent years whittling repo activity into a metric that corresponds to cognitive load.

1. Roll your own stats with git's command line options

The absolute simplest way to get git stats is to use the stats that are already built in to git [1]. Here are the most popular among those.

Commits per developer during past year

git shortlog -sn --no-merges --since "01 January 2019"

Returns in Tensorflow repo:

21255 A. Unique TensorFlower 1127 Yong Tang 1082 Derek Murray 991 Gunhan Gulsoy 865 River Riddle 839 Benoit Steiner ... [hundreds more rows]

Lines of code changed for a developer

git log --shortstat --no-merges --author="Author Name" | grep -E "fil(e|es) changed" | awk '{files+=$1; inserted+=$4; deleted+=$6; delta+=$4-$6; ratio=deleted/inserted} END {printf "Commit stats: - Files changed (total).. %s\n- Lines added (total).... %s\n- Lines deleted (total).. %s\n- Total lines (delta).... %s\n- Add./Del. ratio (1:n).. 1 : %s\n", files, inserted, deleted, delta, ratio }' -

Returns in Tensorflow repo (for "Author Name" = "Yong Tang"):

Commit stats: - Files changed (total).. 1856 - Lines added (total).... 28129 - Lines deleted (total).. 7038 - Total lines (delta).... 21091 - Add./Del. ratio (1:n).. 1 : 0.250204

There exist a variety of git command line stats at this gist. It's not going to be mistaken for the most robust visualization of what is happening in your repo, but the ease of access can't be beat.

2. Use your git provider or IDE stats

If you're using a source control host like GitHub, GitLab, or Bitbucket, you already have git stats at your fingertips. The good news about these stats is that they are free and available. The bad news is these metrics are provided based on ease of calculation, not "utility" or "applicability." For reasons described in Four Worst Metrics to Aggravate Developers, using "Commits" or "Lines of Code" to make or justify decisions tends to draw (warranted) ire from the dev team.

Still, if it's fast access to stats you want, it's fast access you will get by leveraging your existing source code host.

3. Start a free GitClear trial

For those who want to use their git stats to make business decisions, GitClear is the smart choice. Our metrics are vetted by hundreds of customers and the largest open source repos in the world. GitClear has built its reputation on providing signal-rich metrics that help teams squeeze 15%+ improvement to team velocity.

On average, GitClear is less effort to set up than the free tools that will be listed below. You log in through your git provider, and you will have reviewable data within 24 hours. While GitClear is not free after the trial period (averaging about $30/developer, more affordable than any similar product), no credit card is required to sign up for the free trial, so you have little to lose by taking a peek at git stats that are not polluted by 95% noise.

4. Install a free git stats tool

There are no shortage of choices when it comes to the best free tools for measuring commits and lines of code. We will make three recommendations based on your goals.

Best option for rich features: Hercules

1,000 stars on Github. Last commit in 2020. Written in Go/Python.

Hercules has reports. Rich, deep, esoteric... and sometimes even useful. Then there are reports like this... where it's anybody's guess what is supposed to be gleaned.

The latter chart also suggests a drawback of Hercules: dependencies (e.g., Tensorflow) and processing time. There is some heavy duty data processing necessary to create these reports, and the author has documented that these reports can strain under the weight of large development teams.

Installation of Hercules is... complicated. You've got to be thirsty for it.

Google's choice: IonicaBizau/git-stats

5,300 stars on Github. Last commit in 2020. Written in Javascript.

This tool earns two of the top three spots in Google as of April 2020, presumably for its combination of being installable via npm, and rich enough to show some (text-only) stats that mimic GitHub.

The downsides of this option: it only processes commits (not LoC); can't easily parameterize stats to view a particular range; hasn't been actively developed for the past five years; almost all functionality (including the screenshot shown above) requires installing additional npm packages. The default package shows only a rough calendar of commit activity over the past year.

Install and use:

npm i -g git-stats git-stats -g -s '1 January 2020'

Github's second favorite: git-quick-stats

3,800 stars on Github. Last commit in 2020. Written in bash.

git-quick-stats is one of the few git tools that provides an interactive mode, which expedites the muddling that is typically required to get the free tools to output data over the desired time range and committer context.

Install & try out:

bash <(curl -s git-quick-stats

Quick & dirty: gitinspector

1,800 stars on Github. Developed in 2013. Written in Python

gitinspector makes our list because it is one of the easiest tools to install and use. After running it, you'll be provided with an output table similar to this example screenshot, which shows committers, how many LoC they changed, and how much of that LoC came via comments. According to GitClear's lines of code statistics, about 5-10% of lines are comprised of code comments, so this is a nice feature that other tools don't offer.

Install & try out:

npm i -g gitinspector gitinspector --since=1-1-2020

More git stats free tool options

Additional git stats tools that didn't make the top three for either being antiquated, difficult to install, or lacking in visual reports.

  • git-of-theseus. 1600 stars on Github. Developed in 2018. Screenshot example. Interesting because: It has a robust featureset comparable to Hercules and is simpler to setup.
  • Git Hammer. 100 stars on Github. Developed in 2019. Screenshot example Interesting because: It's relatively new, and offers a wider variety of graphical reports than others.
  • hoxu/gitstats. 1,100 stars on Github. Developed in 2009. Screenshot example. Interesting because: It's the grandfather of all git stat tools, and still a high ranking Google result.
  • tomgi/git_stats. 900 stars on Github. Developed in 2012. No screenshots posted online. Interesting because: Obscurity affords an air of intrigue.

Wrap up

Each of the four sources of git stats has its benefits. For most people that simply want a quick & dirty assessment of the activity in their repo, we recommend the command line options. They are readily available, and even in large repos like Tensorflow, git shortlog can run complete within seconds.

If you are looking for git stats because you want to make decisions, we recommend GitClear. Simply put, it is the only product that has credibly taken on the audacious task of translating lines of code into a stable, signal-rich source of truth.