S4E.io
Attack SurfaceAnkara, Turkeyfounded 2021private
S4E.io is a cybersecurity company specializing in Attack Surface, founded in 2021 and headquartered in Ankara, Turkey. It has raised $500K in equity across 1 priced round, employs about 29 people, and is privately held.
updated Sep 12, 2026
Latest S4E.io news and company activity
What S4E.io did, dated — selected moves from the record, one per kind, newest first.
- Dec 2025Feature launchS4E.io Launches Free Online Website Security Check Feature
11 events tracked since Aug 2025 · selected events shownUnlock the complete S4E.io timeline
S4E.io Momentum score
19/ 100
Mandos Momentum blends hiring, funding, traffic and sentiment into one score out of 100. The score is free; the pillars behind it unlock in the platform.
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S4E.io funding
S4E.io has raised $500K in priced equity. Its most recent round was a Pre-Seed in August 2025.
- Equity raised
- $500K1 priced round
- Last round
- Pre-SeedAug 2025
S4E.io employees and hiring
S4E.io has about 29 employees, down 9% over the last 30 days.
- Employees
- 29
- 30-day change
- -9%
- Open roles
- 0
The other 440 data points.
- Funding historyevery round, every investor named
- Headcount growthvelocity, departments, seniority
- Open jobslive postings, hiring pace, role mix
- Tech stackframeworks, clouds, security
