Guy Barkat
Role
Senior at etoro; business owner for the APIs domain (API Trading, Agent Portfolio, App Store) and involved in M&A discussions. In 2026-05-06-brain-os-strategy-brainstorm played the explicit “red team” role challenging the Brain’s value proposition. By 2026-05-27-directions-vertical-pivot-and-prediction-markets had moved from red-team-only into authoring the dominant strategic frame (vertical-use-case-led-brain).
Affiliations
- etoro — current employer; business-owner over API Trading, Agent Portfolio, and App Store. Recent compliance incident blocking two key markets is the canonical “Brain would have caught this” example.
- brm — family VC; father is owner/MP, uncle Eran is the SaaS/hi-tech partner. Potential intro pipeline.
Notes
- Personally knows Sierra’s VP Product (ex-Mixpanel VP Product, who joined Sierra as an IC engineer for ~$7M signing). Used this as a data point for Sierra’s seriousness — see sierra.
- Met Wonderful’s VP Product (Norm Mahabi/Rakhabi — uncertain spelling) once when trying to bring him in to discuss product methodology at eToro.
- Frames the central strategic question as “vitamin vs. painkiller” — see vitamin-vs-painkiller-framing.
- Believes etoro is more chaotic than monday and that most companies are closer to eToro-style chaos than Monday-style alignment, which strengthens the market opportunity.
- Convinced any pitch must convince a CEO buyer that they cannot build this themselves and that the alternatives in 6 months will not be good enough.
- New (2026-05-27) strategic frame: build vertical, use-case-led products with the Brain as the moat underneath — see vertical-use-case-led-brain. Pricing intuition: ride agent-token usage like Cursor (≈20% margin) rather than seat-based wiki licensing.
- Surfaced the prediction-markets-regulatory-play thesis after a conversation with tomer-shalom; has a follow-up scheduled with the chairman of winner-toto early next week.
- Meeting axonius’s CTO Wednesday evening for directions input. Connection routed through pagaya’s founder.
- Personal: child-on-the-way; available cadence-wise “until the birth, then a few days off”; partner of a Maccabi Tel Aviv basketball fanbase (the football opener of the meeting).
Mentioned in
- 2026-05-06-brain-os-strategy-brainstorm — designated red-team challenger; pushed for sharper vision beyond “we are an Operating System.”
- 2026-05-19-saar-leshno-glaucoma-data-tracking — joined saar-arbel for the ari-leshno pitch; pushed Ari hardest on whether the visual-field-tracking pain generalizes beyond ophthalmology.
- 2026-05-27-directions-vertical-pivot-and-prediction-markets — author of the vertical-use-case-led-brain reframe and the prediction-markets-regulatory-play tangent.
- 2026-05-31-directions-connect-businesses-and-brain-scaling — author of the new connect-businesses-multi-vertical-api thesis (third open exploratory direction, non-Brain). Also surfaced the strongest Brain-scaling-difficulty argument yet — and reframed the difficulty itself as the moat.
- 2026-06-02-directions-account-management-vertical — interrogated the AM vertical pitch; pushed for bigger ambition (“be the next Monday for AMs, not just a tool on the side”); raised the integrate-vs.-build-CRM architecture question; offered to connect AM practitioners ofer-mixpanel and Gal (Dave-AI startup) for feedback. Noted his personal experience: managing relationships beyond ~10 customers without a system causes loss of context.
- 2026-06-04-directions-matan-construction — co-led expert interview with matan-amram; raised the subcontractor/labor-deployment layer as an under-examined segment; noted the lack of any real enforcement mechanism on lagging subcontractors as a structural market flaw; suggested following up with “Moshiko” (construction contact) for the subcontractor perspective.