Semion Sidorenko is the Founder and CEO of Prospex. From data engineering to machine learning research, he spent 15 years helping companies scale up data platforms. Before founding Prospex, he worked as an ML engineer at EPFL and as an independent data engineering consultant for Swiss companies.
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Published Sept. 6, 2026, updated Sept. 6, 2026.
Guides
- How to build a Swiss B2B target-account list
- Swiss ideal customer profile (ICP) template, with examples
- Best B2B lead generation tools and data providers for Switzerland
- Swiss company financial statements: what you can compare
- Buying Swiss company addresses: a practical checklist
- SHAB/FOSC notices: reading the Swiss Official Gazette of Commerce
- Swiss company data sources: how to research a Swiss company
- Swiss Company Changes: What They Tell You and What They Do Not
- Firmenhai alternative for Swiss B2B company data
- Pappers alternative for Swiss B2B prospecting
- Moneyhouse alternative for Swiss B2B prospecting
- business-monitor.ch alternative: Prospex vs Business Monitor
- Prospex vs firmenwatch.ch: Swiss company monitoring compared
- easyMonitoring (now Lixt) alternative for Swiss prospecting
- Zefix vs Moneyhouse: Swiss company data sources compared
- What Happens When a Swiss Company Increases Its Capital
- Swiss UID Number: How to Look Up and Check a Company's UID
- Swiss Commercial Register Extract: How to Read It and Find the Board
- How to Monitor a Swiss Company for Changes, Free
- Zefix API: credentials, endpoints and a no-login alternative
- SHAB API: reading amtsblattportal.ch/api/v1/publications
- SIMAP API: searching Swiss public tenders and awards
- Swiss Buying Signals in Clay and n8n
- TAM, SAM and SOM: Sizing a Swiss Target Market from Public Data
- NOGA Codes in Switzerland: Find a Company's Code, 2008 vs 2025
- Finding Companies Like Your Best Customers in Switzerland
- Reactivating Dormant and Closed-Lost Accounts
- B2B outreach email examples built on Swiss company changes
- Swiss account research template, with two completed briefs
- Swiss B2B prospecting workflow: from target list to sales conversation
- How Big Is the Swiss B2B Market? STATENT vs the Register
- Finding employer clients for a Swiss recruitment agency
- Using Swiss job adverts to find recruitment clients
- Monitor target employers: a Swiss recruitment workflow