Fantasy Space
Madrid, Spain
About
Fantasy Space is a Madrid product engineering firm founded in 2020, building AI-driven software for startups and growing companies. Its AI work covers agentic automation, LLM integration, and generative AI alongside full-cycle product development.
Who They Work With
Early-stage founders in Spain who need a product built quickly and will scope any real model work separately.
Based on 3 client engagements with a source URL · researched 27 Sept 2026
Our Take
Read the phrasing carefully and the offer resolves. Across six named case studies the recurring formulations are AI-assisted development, AI systems integration and AI process optimization. That is AI in how the software gets built and which third-party services get wired in, not AI as the thing delivered.
The delivery record itself is solid for a firm founded in 2020. Leanzer, a weight-loss platform matching users to certified health professionals, has run four years with a team of eight and reports more than 4,000 users onboarded. Alongside it are a verified business-to-business messaging environment, an education platform with progress tracking, two marketplaces and a reservation platform, each with a named client and a stated result.
What no study describes is a model trained, an evaluation run or an accuracy figure. For a buyer whose problem is an agent or a pipeline, that gap is the whole question.
Fantasy Space publishes no rate itself; the €20–40/h shown here comes from a third-party directory listing, and it is at the bottom of the Madrid range for a team of ten to forty-nine.
Key strengths
- Six published case studies, every one naming its client and carrying a stated outcome, which is rare for a firm founded in 2020
- The Leanzer relationship has run four years with a stated team of eight, so the engagement model is continuity rather than project churn
- Case studies publish the shape of the work openly—year, duration, team size and platform—before any conversation starts
Good to know
- The AI language throughout is assisted development and integration; ask which model the team trained, evaluated or operates in production
- Reported outcomes are adoption and revenue at early-stage scale—4,000 users, $16,000 of early revenue—so check they map to your volume
- A directory rate at the bottom of the Madrid range from a ten-to-forty-nine team—ask who builds and who reviews the generated code
Reviewed by Gabor Kiss
Founder & Curator, AIAgencies.eu · 9 Sept 2026
Based on the agency's publicly available portfolio. Own this agency? Claim your profile to provide additional context or request a review update.
Notable Clients
Every engagement documented in a published case study
Documented engagements: Leanzer, AIT Classroom, and Stone Market. All 3 carry a source URL on file.
Industries
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