Seventy3, AI agent systems for ambitious companies
Seventy3 (SeventyThree) is a boutique studio in Barcelona that designs and runs AI agent systems for ambitious companies. We build around your existing stack, ship to production, and hand the system to your team to own. The code, prompts, and evals live in your repos under your license from day one.
What we ship, by client type
- Executives: Strategic AI Programs, a 4 to 6 month engagement. Executive briefing agents, brand-grade AI features, strategic intelligence platforms, AI-augmented internal stacks.
- Entrepreneurs: Founding-Stage AI Build, 12 to 16 weeks. AI-native v1 products, multimodal customer interfaces, founding-stage brand identity, investor-grade pitch and landing.
- Business Owners: Owner-Led Sprints, 8 to 12 weeks per product. Customer service front-door agents, creative production agents, back-office automation, internal knowledge agents.
- Business Unit Leads: Vertical Unit Wins, 10 to 14 weeks. Vertical AI tools, unit command centres, intake and qualification agents, procurement-ready architecture.
How we work
We build on your stack: your cloud, your model providers (OpenAI, Anthropic, open-weights), your data store, and your CI. You own the IP, prompts, and code from day one. Most engagements are joint builds with your existing engineering team.
Contact: hello@seventythree.ai. Office: SeventyThree Labs S.L., 270 Carrer de Lepant, Barcelona 08013, Spain. Case studies. Get in touch.