Overall influence
42 / 100
Sina Sabet
@sina_eth_Co-founder of WITNESSParadigm, Google
Sina Sabet is a co-founder of Witness with prior experience at Paradigm, Google, and Facebook. His mix of crypto investing and big-tech background gives him a cross-disciplinary lens on infrastructure, product execution, and capital allocation, making him a recognizable figure in the sector.
Career years
1 yearsAffiliated organizations
--Personal investments
1 orgsMedia exposure
82 times / monthNet worth
--01
Person Profile
Sina Sabet is a co-founder of Witness with prior experience at Paradigm, Google, and Facebook. His mix of crypto investing and big-tech background gives him a cross-disciplinary lens on infrastructure, product execution, and capital allocation, making him a recognizable figure in the sector.
He appears pragmatic and execution-oriented, favoring projects with clear product utility and infrastructure relevance. His risk appetite seems measured, with a preference for long-term value over short-term hype.
Recent public attention has centered on his role as a Witness co-founder, with interest focused on Web3 infrastructure and token launch platform narratives. There has been limited visible media activity lately, keeping exposure relatively moderate.
BirthplaceParadigm, Google
Education--
Career years1 years
Affiliated organizations--
Personal investments1 orgs · Unicorn 0
Media exposure82 times / month
AI Style ProfilePractical · Hybrid Lens · Cautious
Pragmatic OperatorPractical
With experience from Paradigm and major tech companies, he likely evaluates opportunities through demand validation, team quality, and execu
Cross-Disciplinary EdgeHybrid Lens
He can bridge crypto-native logic with internet product thinking, which helps assess usability, distribution, and implementation efficiency
Main DebateCautious
His public investment and project track record is limited, so outsiders have less outcome-based evidence to judge his style; much of his inf
02
Career
Co-founder of WITNESS
Sina Sabet is the co-founder of Witness, and previously worked at Paradigm, Google, and Facebook.
03
Related Entities
g8keep
LaunchpadWeb3 token launch platform
04
Investment Preferences
Compliant InfrastructurePriority
He is likely drawn to infrastructure and platform projects that can support long-term ecosystems, especially those tied to issuance, distrib
Web3 Launch PlatformsInterested
His known investment in g8keep, a Web3 token launch platform, suggests a clear interest in early-stage project bootstrapping and community d
Product-Market FitFirst Filter
He likely prioritizes whether a product solves a real problem before considering narrative strength, avoiding overly conceptual bets too ear
Team QualityCore Criterion
Founder execution, technical depth, and iteration speed are likely important inputs, especially when evaluating early-stage opportunities.
05
Investment Activity
No investment activity data
06
Network
Core identity
WITNESS
Former org
Paradigm
Former org
Google
Former org
Facebook
Early project
g8keep
Collaborator
Robot Ventures
Collaborator
Base Ecosystem Fund
Collaborator
Azuki
Collaborator
Patrick Collins
Sina Sabet’s network centers on the WITNESS founding circle, his prior experience at Paradigm, and a broader crypto investing collaboration web. He also overlaps with several project and investor names through the g8keep pre-seed round, suggesting a network spanning infrastructure and application-layer crypto work.
News Updates
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Social Activity
@sina_eth_ · 0
Sina Sabet@sina_eth_ · 2026/06/25Policy impactOH: the current regulatory regime is so friendly to crypto that we don't need crypto
6014767
AI: Policy-driven commentary with emphasis on compliance rollout and clearer rules.
Sina Sabet@sina_eth_ · 2025/08/11Opinion output@zmanian @ViktorBunin If I win a round, what prevents me from selectively excluding bids in the next round?
103127
AI: Continues the public long-term stance, emphasizing execution efficiency and industry direction.
Sina Sabet@sina_eth_ · 2025/08/11Opinion output@zmanian @ViktorBunin Interesting; who runs the auction? 🤔
103106
AI: Continues the public long-term stance, emphasizing execution efficiency and industry direction.
Sina Sabet@sina_eth_ · 2025/05/28Sector impact@donnoh_eth @MMJahanara @_weidai True, I wasn't accounting for the privacy dynamics of this specific instantiation 🙏 https://t.co/asonMZGexJ
20397
AI: Theme-oriented investment view, reinforcing conviction in infrastructure and new narratives.
Sina Sabet@sina_eth_ · 2025/05/28Sector impact@donnoh_eth @MMJahanara @_weidai The details depend on how exactly withdrawals work, but single-slot DA challenges along with force-include txns should let you get out of most positions in a censoring-but-live-operator case. More complex cases may require more iters, I believe the pattern is general enough 🫡
10180
AI: Theme-oriented investment view, reinforcing conviction in infrastructure and new narratives.
Sina Sabet@sina_eth_ · 2025/05/28Sector impact@donnoh_eth @MMJahanara @_weidai Don't even need a whole merkle proof; as long as the stf handles the force-included query (a "DA challenge") and we get a zkp covering all this, we can trust the query result and use it as if it's merkle proven.
104148
AI: Theme-oriented investment view, reinforcing conviction in infrastructure and new narratives.
Sina Sabet@sina_eth_ · 2025/05/21Opinion output@paulgebheim @0xosprey @brianseong Shouted out [A-Z]apps in our references on this page: https://t.co/peSOX8M088 Paygo was hugely inspired by this and other similar works 🫡
10163
AI: Continues the public long-term stance, emphasizing execution efficiency and industry direction.
Sina Sabet@sina_eth_ · 2025/05/21Opinion output@that_one_nerdy_ @YourBuddyConner @0xosprey @0xkydo @Infinity_VM Everyone has a private Indexed Merkle Tree (IMT) implementation so we wanted to have our own too 😩
102252
AI: Continues the public long-term stance, emphasizing execution efficiency and industry direction.
Sina Sabet@sina_eth_ · 2025/05/21Opinion output@0xkydo @0xosprey @WitnessCo_ Up only from here 🫡 https://t.co/vfy1AHn7tJ
10103.2K
AI: Continues the public long-term stance, emphasizing execution efficiency and industry direction.
Sina Sabet@sina_eth_ · 2025/05/21Sector impactThis isn't a copypasta L2; Paygo is built radically different. Instead of scaling a blockchain node, we've been exploring adding verifiability to existing web2-API patterns. Thanks to epic work from our industry juggernaut friends, we've landed on a design that affords higher scale, customizable UX, and cleaner architecture.
176806.9K
AI: Theme-oriented investment view, reinforcing conviction in infrastructure and new narratives.
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