Built by operators who lived the problem.

We started Zephior in 2024 because we saw the same pattern across every industry: organisations losing deals not because they weren't qualified, but because the proposal process was broken.

AI changes the economics of responding.

When generating a high-quality proposal response takes minutes instead of days, the entire procurement landscape shifts. Smaller companies can compete with incumbents. Qualified sellers stop losing to better-resourced ones. Buyers get better responses from a wider field.

We're not building a writing tool. We're building the Zephior Agent Platform so supplier teams can find the right opportunities, answer with evidence, and turn decisions into submission-ready work.

Small, senior, shipping.

Built by people who have written the proposals, run the compliance, and shipped the software.

Tony Kim

Tony Kim

Founder, CEO

Presales & solutions at Ripple, working with Tier-1 banks. Now also leads engineering at InlookAI and Ageospatial. Started Zephior after writing 150+ proposals by hand.

LinkedIn →
Sebastien Thevenaz

Sebastien Thevenaz

Founding Engineer

Founded and led InvestGlass as CTO, a Swiss client-management platform for banking and wealth. 10+ years building enterprise software.

Advisors
Laurent De Carlo
Laurent De Carlo
Risk & Compliance

Chief Compliance & Risk Officer at Groupe Mutuel.

Reiner Guthier
Reiner Guthier
Banking & FinTech

50 years banking, 25 years in board positions.

Alexander Vizi
Alexander Vizi
Growth & Operations

Invesco ETF Distribution. Co-founder, Go Kidogo.

The best seller should win. We're making sure they can.