Mozilla Foundation's annual open internet and digital rights festival: three days in Barcelona, 28 to 30 October 2026, at Recinte Fabra i Coats, under the theme Wilding.
Mozilla Festival, also called MozFest, is the Mozilla Foundation's annual festival on the open internet, digital rights, open source and AI and society. The 2026 edition is themed Wilding: the organiser frames it as a call to loosen rigid, centralised systems and let communities and technologies evolve collectively, through community-owned mesh networks, federated platforms, open protocols and community archives. It takes place in Barcelona and is part of Open Tech Week, run with the City of Barcelona.
28 to 30 October 2026, Wednesday to Friday. Recinte Fabra i Coats, Carrer de Sant Adrià, Sant Andreu, 08030 Barcelona, Spain, a former industrial complex now used as a cultural site.
Mozilla Foundation, the non-profit and philanthropic mission-holder of the Mozilla Project. The festival director named on the official page is Zeina Abi Assy. The organiser says it is partnering with the City of Barcelona for the 2026 edition.
The official festival page gives 2,000+ people, an organiser figure that it ties to the 2025 edition in Barcelona ("more than 2000 people"); no separate 2026 attendance target is published. The organiser describes the audience as builders, decision-makers, policymakers, creators and activists. Tracks cover founders, developers, artists and young people aged 13 to 17, and children under 13 attend free.
The theme is Wilding, and the programme is organised in eight tracks: Wilding Advocacy, Wilding Knowledge, Wilding Systems, Wilding With Nature, Youth Wilding, Wilding Creativity, Founders Wilding and Developers Wilding. Each track is co-designed by community Co-Curators from across regions and disciplines. The 2026 edition is again in Barcelona, where the 2025 edition drew 2,000+ people (organiser figure). Badge prices are now published for 2026, see the ticket entry.
The official schedule lists 146 sessions as of 16 October 2026, with separate listings for sessions and for art and booths. Themes on record: open web, ethical AI, digital rights, open source, internet health and privacy. The eight tracks are:
Community session proposals feed the programme. The official page lists debates, labs and workshops, forums, showcases, talks and installations. The programme is co-created: people from around the world propose the sessions, and the organiser says this keeps the programme close to work on the ground.
Community side events are allowed: the organiser asks hosts to declare them through its Community Side Events Form and has published a document of side-event venues. MozFest is part of Open Tech Week Barcelona; a Mozilla email reproduced by a third party gives the week as 26 to 30 October and names Decidim Fest, the 4D Conference on digital rights and a People's Assembly for Open Technology as co-located events (unverifiable information). The official festival pages do not list them.
All badges give the same access to the festival. Community Badge: 52.50 EUR plus 5.25 EUR VAT, the standard badge for individuals. Supporter Badge: 419 EUR plus 41.90 EUR VAT, for people attending as part of their professional work or anyone able to pay more, which subsidises Community badges. Student Badge: 5.25 EUR plus 0.53 EUR VAT, with a valid student ID or email address required. Youth Badge: 5.25 EUR plus 0.53 EUR VAT, for ages 13 to 17, bought by a parent or guardian; under 13s attend free. A free Press Accreditation badge exists for accredited press. The badge does not include travel or accommodation.
Sessions are proposed by the community through the Call for Proposals on the Mozilla Foundation festival page. The proposal deadline for 2026 was Sunday 24 May 2026 and has passed. The schedule now lists 146 sessions and no open call was found on the official pages on 16 October 2026. The organiser's travel fund for accepted sessions has been fully allocated and is closed. Earlier versions of this fiche described the call as open: that is no longer true.
Sponsorship enquiries go to festival@mozillafoundation.org, which sends the full sponsorship guide. The official sponsorship page offers partnership tiers plus optional add-ons: a Community Travel Fund, a storytelling series and an Impact Zone pavilion corner. Tier prices are not published. That page still carries the 2025 sponsor and partner lists. Art installations and booths have their own section in the schedule.
No 2026 sponsor list is published on the official pages as of 16 October 2026; the sponsorship page still shows the 2025 lists. The 2025 sponsors named there were Ethereum Foundation, Luminate, Siegel Family Endowment and Omidyar Network. A Mozilla email reproduced by a third party names DataKind, Siegel and Luminate as 2026 sponsors (unverifiable information). The 2025 program partners were SMEX, Decidim, MEEDAN, Slickcity Studios, Xnet, Pulitzer Center, DDS, EFF, Open Television, Flickr.org, GIZ and Fair Forward (research record from the 2025 page, not confirmed for 2026).
Not publicly disclosed as a company breakdown. The organiser describes a mostly non-commercial audience of technologists, activists, researchers, policymakers, educators and artists. The only commercial segment named is the Founders Wilding track for early-stage startups. The 2025 sponsors on record are philanthropic funders and one blockchain foundation, not vendors.
Choose the free Press Accreditation badge on the Mozilla Festival badge page. It is open to accredited press and freelance journalists, and new media is welcome. The organiser reviews every application and emails the outcome whether or not accreditation is confirmed. Media requests go to press@mozillafoundation.org.
None found from independent news outlets for the 2026 edition. What exists is announcement material: the organiser's own call for proposals post on the Mozilla Discourse forum, plus event-listing pages from media-rights and research networks (MediaWell, Media Rights Agenda) and a youth-opportunities site repeating the call for proposals.
Nothing placed or partnered: no official media partner is on record. The coverage found is organiser-originated (the call for proposals) or listing pages that repeat the organiser's wording, so it adds no independent evidence. Attendance and programme figures should be read as the organiser's.
Buyers looking for a vendor exhibition, lead generation or a product-launch stage: the official page describes debates, labs, forums, showcases, talks and installations, and the sponsors on record are funders. Speakers who missed the 24 May 2026 proposal deadline cannot count on a slot, since the programme is community-submitted and the call has closed.
It is the autumn event of the open internet and digital rights community rather than a developer-tooling conference. Its developer content sits in one of eight tracks, Developers Wilding, on open source AI outside the hyperscalers. No sourced comparison with other developer AI conferences is available. MozFest runs in the same week as Open Tech Week Barcelona.
No. The 2026 edition is in Barcelona only. MozFest is annual; the 2025 edition was also in Barcelona, and the organiser's sponsorship page says the festival first launched in Barcelona 15 years ago under the name Drumbeat. The venues of other earlier editions are not listed in the sourced pages.
The official festival pages are published in English, with translated versions in several languages including Spanish, Catalan, French, German, Polish and Portuguese. The language of individual sessions is not stated on the pages read. The research record lists English and Spanish (unverifiable information).
Not mentioned for 2026: the official pages describe in-person attendance with a badge picked up at the venue, and no livestream, hybrid option or session replay is announced. The organiser publishes a highlights video of the 2025 edition.
No refund policy is published. The only provision on the official FAQ is that a badge can be transferred to someone else if the holder cannot attend, requested by email to festival@mozilla.org.
Yes, with measures stated on the official Plan Your Trip page: a marked accessible route through the venue that avoids cobblestoned areas, elevators in all main festival buildings, mostly gender neutral restrooms plus accessible restrooms, a quiet space for reflection, a parent and carer space and a first aid station. The longest crossing of the venue by mobility scooter takes about 4 minutes. A pre-event accessibility guide with maps and lift locations is promised closer to the festival. Attendees with access needs are asked to email festival@mozillafoundation.org in advance.
The venue is at Carrer de Sant Adrià, Sant Andreu, 08030 Barcelona. The closest station is Sant Andreu, about a 5 minute walk, served by metro Line 1 (red), R2, R2N, R11 and regional trains. Barcelona-El Prat Airport is 30 to 40 minutes away: Aerobus (about 35 minutes), metro Line 9 Sud with a special airport ticket, the R2 Nord train from Terminal 2 (about 25 minutes) or a taxi at 30 to 40 EUR. The organiser lists partner hotels with 10% discount codes.
Because the programme is built by its community rather than handed down: the organiser says people propose the sessions, eight tracks are co-designed by Co-Curators, and 146 sessions are now listed. For a reader tracking open internet policy and community-owned infrastructure, that makes it a place to meet practitioners and funders, not vendors.
Every figure here is the organiser's own. The official page gives 2,000+ people and ties it to 2025, while the research record held 3,000, which the official page does not support. No audit is published, and the 2026 sponsor list has not replaced the 2025 one on the sponsorship page. Read the numbers as organiser claims about the past, not as a forecast.
Official site: https://www.mozillafoundation.org/festival (redirects to the English festival page, in the Mozilla Foundation domain). Badges and the schedule sit on events.mozillafoundation.org. Contact: festival@mozillafoundation.org; press: press@mozillafoundation.org.