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Become a sponsor to Joona Hoikkala

The sponsorships enable and encourage me to work more on the open source tools that have gained a good reputation and are used by thousands of security professionals around the world.

It also allows a justifiable way for companies and freelancer professionals that use these tools commercially to lend a hand and to get their individual needs in terms of feature requests and fixes prioritized.


While my tools have received a lot of praise from the community and are used commercially - reaching 100 sponsors would definitely show that my work has been appreciated.

Current sponsors 8

Private Sponsor

Past sponsors 28

Private Sponsor
Private Sponsor
Private Sponsor

Featured work

  1. ffuf/ffuf

    Fast web fuzzer written in Go

  2. joohoi/acme-dns

    Limited DNS server with RESTful HTTP API to handle ACME DNS challenges easily and securely.

  3. ffuf/pencode

    Complex payload encoder

  4. acme-dns/acme-dns-client

    A client software for

    Go 74
  5. joohoi/acme-dns-certbot-joohoi

    Certbot client hook for acme-dns

    Python 164
  6. certbot/certbot

    Certbot is EFF's tool to obtain certs from Let's Encrypt and (optionally) auto-enable HTTPS on your server. It can also act as a client for any other CA that uses the ACME protocol.

    Python 29,769

7% towards 100 monthly sponsors goal

@tomikoski @hipotermia
@projectdiscovery @vaadata @JosephGregg @intrd

tomikoski and 6 others sponsor this goal

Select a tier

$ a month

You'll receive any rewards listed in the $10 monthly tier.

$1 a month



A subtle thank-you. Much appreciated! Buys me a cup of
No perks associated in this tier.

$5 a month



Helps to pay for acme-dns server costs.
No perks associated in this tier.

$10 a month


Appreciative hacker

An individual that enjoys my work and wishes to support it.
Keeps me hydrated for ffuf development.


  • Access to sponsorware

$30 a month


Bug bounty beast

Individual who's using my tools in bug bounties and making a a decent profit from them.
They are wishing to give back and to support the continuous effort to keep their tools in top notch.


  • Access to sponsorware

$100 a month


Freelancer / Startup

You might be a solo security professional that uses the tools I create and makes a good profit off them.
You are wishing to strongly support the development of my tools and want to show it!


  • Access to sponsorware
  • Logo + link listed on the landing page of chosen tools I develop.

$300 a month


Gold Sponsor

You run a successful business or agency that generates profits from tools/software I create.


  • Access to sponsorware
  • Logo + link listed on the landing page of tools I develop (you can choose)
  • Priority support for created issues / feature requests

$600 a month



You're an established security company and want to team up to help build a sustainable Open Source community for Infosec/Hacking tool developers. This tier also includes all of the perks from the Gold Sponsorship, and something custom for you :)

Please contact