DevFest Nantes · 2027

Agoris analysis · updated October 2026

Key takeaways

• DevFest Nantes is the annual technical conference for developers in western France, organised by GDG Nantes (Google Developer Groups Nantes) since 2012. Web, mobile, cloud, data, AI and connected devices are covered across several parallel tracks.
• Next edition: 11 and 12 March 2027 at the H Arena, in Nantes. The event is exceptionally moving away from the Cité des Congrès, which is undergoing renovation works.
• Exceptional calendar: DevFest is held only once over the 2026-2027 period (no autumn 2026 edition). The annual rhythm resumes thereafter.
• 2025 review (16-17 October, Cité des Congrès): 3,500 attendees, 71 talks and more than 90 speakers across 4 tracks (source: devfest.gdgnantes.com).
• The 2027 edition has a sporting theme: "let's get sporty! Lace up your boots and get ready for a sporting edition!"

The essentials

• Official website: devfest.gdgnantes.com
• Organiser: GDG Nantes (Google Developer Groups Nantes)
• Co-organiser: n/a
• Frequency: annual (exceptionally a single edition over the 2026-2027 period, with the annual rhythm resuming thereafter)
• Venue: H Arena, Nantes
• Dates: 11-12 March 2027

Who exhibits

Typical profile

DevFest Nantes is a developers' conference, not a conventional trade show. The "exhibitors" are sponsors: IT services companies and tech consultancies, software publishers and cloud platforms, schools and training organisations, and recruiters from the digital sector. The audience is made up of developers, lead techs, architects, CTOs and computer science students, mainly from the Grand Ouest region.

Sponsors and partners

The opening of sponsorship packages for 2027 was announced for 9 June on devfest2027.gdgnantes.com. The list of the edition's partners is published as the campaign progresses on devfest.gdgnantes.com. In recent editions, the Nantes and national tech ecosystem (IT services companies, schools, publishers) has formed the bedrock of sponsors.

Audience quality

• A qualified technical audience: developers, lead techs, architects and CTOs, the vast majority being working professionals
• 3,500 attendees brought together in 2025, in a format with a high density of exchanges (talks, Quickies, codelabs)
• A strong regional foothold in the digital ecosystem of the Grand Ouest, with national reach on web, cloud and AI topics

Activities & community

Conference programme

The 2025 edition offered 71 talks delivered by more than 90 speakers across 4 parallel tracks. The programme blends long talks for in-depth topics, short sessions (Quickies) for specific points, and codelabs for hands-on practice, spread across the themes of web, cloud, big data, mobile, connected devices and AI (source: devfest.gdgnantes.com).

The detailed 2027 programme and the call for papers (CFP) have not yet been published to date. The 2027 edition is announced under a sporting theme.

Community and networks

DevFest Nantes is run by GDG Nantes, a community of developers affiliated with the Google Developer Groups programme, active since 2012. The event relies on a network of volunteers and the local tech community.

News about the edition is shared on the X account @devfestnantes.

On site: what you need to know

Access and practical information: see the venue page H Arena. Worth noting for 2027: the event is exceptionally being held at the H Arena, rather than at the usual Cité des Congrès, owing to renovation works.

Specific to the event:

• Format: a 2-day conference (Thursday and Friday), with parallel tracks and networking spaces.
• Ticketing: on-sale dates not yet announced to date (source: devfest.gdgnantes.com).

Preparing your visit

For the sponsor

• 9 months out: get in touch about the sponsorship packages, whose opening was announced for 9 June on devfest2027.gdgnantes.com.
• 6 months out: choose your level of visibility and prepare the stand / on-site activity.
• 3 months out: brief the team on the targeted technical profiles (recruitment, employer branding, product demos).

For the visitor

• Keep an eye on the opening of ticketing on devfest.gdgnantes.com: recent editions have sold out quickly.
• Plan for the full 2 days to cover the parallel tracks (web, cloud, data, mobile, AI).
• Target the talks and codelabs in advance once the programme is published.

How the event has evolved

Trajectory analysis

A benchmark conference for developers in the Grand Ouest since 2012, DevFest Nantes has established itself as one of the largest French-speaking DevFests, with 3,500 attendees in 2025. The 2027 edition, from 11 to 12 March at the H Arena, is atypical on two counts: a change of venue linked to the renovation works at the Cité des Congrès, and a tightened calendar that makes the 2026-2027 vintage a one-off edition before the annual rhythm resumes. The programme, the call for papers and the 2027 target figures will be published as the event approaches.

Unless otherwise stated, all factual data in this listing comes from the organiser's official website (devfest.gdgnantes.com).