Contributing to Umbrella

There are many ways you can contribute to Umbrella. No effort is too small and whatever you bring to this community will be appreciated. So read on to find out how you can make a difference in Umbrella.

Contributor License Agreement

Contributions to Security First software projects may be accompanied by a Contributor License Agreement. You (or your employer) retain the copyright to your contribution; this simply gives us permission to use and redistribute your contributions as part of the project. See your current agreements on file or to sign a new one here.

You generally only need to submit a CLA once, so if you’ve already submitted one (even if it was for a different project), you probably don’t need to do it again.

Spread the Word

  • Review Umbrella on Google Play or Amazon.
  • Follow us on Facebook or Twitter.
  • Share Umbrella with your team.
  • Tell us how we can help you stay secure! Drop us an email, we’d love to hear from you.


We warmly welcome corrections that will improve Umbrella content. Send us an email at any time. We’re also designing a collaborative workflow to help you submit corrections.

Depending on your technical knowledge, there are several ways to contribute content for Umbrella. See below. If you just want to tell us about one tiny thing and you don’t have bandwidth for a tutorial right now, feel free to email a short description of the change you want to propose to [email protected] or open an issue in our Tent content repo.

Using GitHub and

If you are not familiar with git, GitHub and Markdown, read our beginner tutorial for editing content hosted in a GitHub repo using

Using GitHub and Markdown

You can also use Markdown to can write new content for Umbrella or edit existing Umbrella content from GitHub’s interface. Follow these steps: - Fork the tent-content repository - Create a new branch - Make your changes and commit - Submit a pull request

(This is a great source for learning about Markdown.)


We are always looking for volunteers for app testing and quality assurance. Drop us an email if you can help.


Help us feed our developers. If you are interested in funding any of our work, please get in touch by email.


Donate BitCoin to 13ELGTYhHdKvgiRCquANYFq6EZRj21C3R9.

Report bugs

Unfortunately stuff breaks sometimes. If you are in a hurry and have found a code or content problem then please email it to [email protected]. If you have a little more time we generally try to manage any bugs using GitHub. If something is broken, please let us know so we can fix it! Creating an issue on our Umbrella Android, Umbrella iOS or Umbrella web issue trackers.

If the issue you have identified is a security risk to users, please read the Responsible Disclosure and Bug Bounty section below.

If you wish to contact us via PGP, please drop a mail to [email protected] (2C1D3B4D)

After reporting a bug on GitHub, if the Umbrella developers make a code change that resolves your issue, then your GitHub issue will typically be closed from the relevant patch message. If, after testing the fix, you find that it does not really fix your bug, please leave a comment on your issue explaining the situation. When you do, we will receive a notification and respond on your issue or reopen it (or both). Please do not create a duplicate issue.

In other cases, your issue may be closed with a specific resolution, such as R: duplicate, or R: wontfix. Each of these labels has a description that explains the label. We’ll also leave a comment explaining why we’re closing the issue with one of these specific resolutions. If the issue is closed without one of these specific resolutions, then it means, by default, that your reported bug was fixed or your requested enhancement was implemented

Responsible Disclosure and Bug Bounty

If you find a security critical issue, please read our responsible disclosure policy.

Security First participates in the HackerOne bug bounty system, an information security best practice. In return, you get free swag and recognition. Visit our page and read the rules here. (Sign up for an account if you don’t have one.)

Contribute Ideas

Ideas are powerful things! If you have any about what we could do better or things which you think we should do in future, please email us at [email protected]. Alternatively, you may open a feature request as a GitHub issue.

Contribute Code

Wanna write code people rely on daily to make life or death decisions? We would love your help, especially in the following areas:

  • Android (Java/Kotlin) development
  • iOS development
  • Web app development
  • Golang development
  • React development
  • Gamification
  • UI/UX

Our code for Umbrella Android, Umbrella iOS and Umbrella Web on GitHub.

We have a really big development plan of functionality we want to include in the future and are currently in the process of building a way to manage contributions from the open source community. Until we have that up, please drop us a mail to [email protected] if you are interested in a contributing a specific part of future code.

If there is something you want to help out with in the interim, then here is some basic advice:

  1. Fork the repo!

  2. Create your feature branch: git checkout -b my-new-feature

  3. Commit your changes: git commit -am 'Add some feature'

  4. Push to the branch: git push origin my-new-feature

  5. Submit a pull request :D

Most often, you have to test your changes to ensure that they work as expected before submitting them to us. See our build instructions for Umbrella Android and Umbrella Web.

Improve documentation

Umbrella’s documentation, especially the user manual, would greatly benefit from your help. Good documentation is difficult to keep up-to-date. You can help us edit or write new content for the unser manual. In addition, if you find a typo or an error on any page of the website please let us know — ideally, by submitting a pull request against the secfirst repo with your correction.

If you have a question about something you read in the documentation, please send us a mail to [email protected].

Here are a few guidelines and Markdown conventions to keep in mind when writing documentation for Umbrella. Doing so helps creating a consistent language across the documentation:

  • Do not duplicate documentation. Duplicating documentation is almost always a bad idea, since it presents a maintainance issue. Almost all documentation has to be updated as some point, and when similar documentation appears in more than one place, it is very easy for it to get updated in one place but not the others When this happens, this leads to inconsitent, and the outdated documentation becomes a trap, especially for novice users. The solution is to link to existing documentation rather than duplicating it. There are some exceptions to this policy (e.g., information that is certain not to change for a very long time), but they are rare.
  • In order to enable offline browsing, always use relative (rather than absolute) links, e.g., /umbrella/manual/ instead of An exception to this rule is when linking to files like,


You can help correct, improve, or complete the translations of Umbrella content into your native language. Umbrella is being translated into more than a dozen languages, and you can help. Most of Umbrella can be translated directly online, through a simple web interface, after logging in with Transifex. Umbrella can be translated into more than 140 languages this way.

To get started:

The awesome Localization Lab manage volunteer translators for Umbrella (read their guide here). If you are an organisation, the fastest way to see Umbrella in your language is to donate money for us to hire a translator. Thank you!

If you want to go further and translate the Umbrella website (particularly the user manual), please get in touch.


Outreach material

Talk at events

You can talk about Umbrella at various events, e.g. a journalist safety workshop, a group of domestic violence survivors, a security conference. It all depends on who you happen to meet, what they are interested in, and what you feel comfortable talking about. Do not hesitate asking for advice or review of your material. Discuss any promotional ideas you may have with us at [email protected].

Improve Umbrella’s user experience

If you are a UI/UX or HCI person, you can surely find ideas to improve Umbrella! Even if you don’t implement your suggestions yourself, create GitHub issues with your ideas so that others can benefit from your insight.

Say hello in real life

Our team are based in Dublin, San Francisco, Madrid, Bristol and London. Let’s grab a coffee. Drop us an email at [email protected].