Walter
YC X26San Francisco, US · Founded 2026 · 2 employees on LinkedIn · 7 known investors
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Erica Vanunlockedknows Nikolas Keller · together at Stealth Startup (overlapped)
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Walter is a document processing and data extraction platform that reads PDFs and emails, validates data against customer catalogs, and writes validated information directly into ERP systems. It serves enterprise customers for tasks like sales order processing and bill of material analysis.
Also known as Lobster AI · Vaulter · Vaulter Technologies
Founders & leadership· Y Combinator alumni (X26)
Walter was founded in 2026 by Nikolas Keller and Lukas Postulka.
NK
Nikolas Kellerin𝕏Co-founder · CEONikolas Keller worked as the first hire at an AI-focused manufacturing startup and has prior experience in high-end restaurant kitchens across France, Italy, and Germany. He attended CDTM and is a Z Fellow.
LP
Lukas PostulkainCo-founder · CTOLukas Postulka previously worked as a quantitative trader and studied at Technical University of Munich (TUM). He was a fellow in the Z Fellowship program.
Investors · 7
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Frequently asked questions
- What does Walter do?
- Walter is a document processing and data extraction platform that reads PDFs and emails, validates data against customer catalogs, and writes validated information directly into ERP systems. It serves enterprise customers for tasks like sales order processing and bill of material analysis.
- Who founded Walter?
- Walter was founded by Nikolas Keller, Lukas Postulka in 2026.
- Who are Walter's investors?
- Walter's investors include Y Combinator, Category Ventures, Haystack, Panache Ventures, RRE Ventures, Techstars, Uncork Capital.
- Where is Walter headquartered?
- Walter is headquartered in San Francisco, US.







