The Espruino Web IDE (and Espruino in general) is supported by generous donations from many supporters on Patreon
Supporters that pay $10/month or more to help support Espruino are:
Matt Eckman, Michael Leibman, Orry S, Eric Betts, MaBe, Sacha Gloor, INT3GRATION, James Palmer, Andreas Dröscher, Dimitri Deniusov, John Kovach, Spence Konde, Ron Cromberge, Noah A Neibaron, Joshua Taylor, Thomas Smith, Ryan Paull, Gito Nirmolo, Chaz, Rune Jørgensen, Gilberto Bermúdez Garro, Jeff Magee, John Peck, Glen Murphy, ildorn, Gary Ott, the-alchemist, Rich Dunajewski, SmartMe.IO, The Logan, John Vann, Sergey Voytehovich, T Persson