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About
Alessio Fanelli is a Partner at Decibel, where he leads Seed and Series A rounds in AI, infrastructure software, security, and developer tools. He also serves as the firm's CTO, building its internal software platform for programmatic sourcing and project tracking. Before Decibel, he was involved with 645 Ventures, where he wrote about and led investments in developer-tooling companies. He co-hosts the Latent Space podcast with swyx, which grew into a large AI Engineers community and drew over a million views in 2023. He is an active writer and open-source builder, having released tools like smol-podcaster.
Contact· published on Alessio's own website
Invests in
AI & Machine LearningCybersecurityDeveloper ToolsEnterprise SoftwareSaaS
Beyond investing
- Communities
- Co-hosts the Latent Space podcast, described as the largest AI Engineers community, with his friend swyx.
- Hobbies
- Plays soccer in his spare time. Plays Magic: The Gathering. Plays FPS games, mostly Call of Duty and Counter-Strike.
- More
- Was born and raised in Rome, Italy. Open sourced smol-podcaster, a tool for podcast transcription and chapter generation using LLMs. Gave a talk at the Linux Foundation Members Summit on open source monetization.
From Alessio's own website — common ground for a warm intro.
Experience
- Kernel LabsFoundercurrent2025 — presentSan Francisco Bay Area
- Latent Space PodcastCo Hostcurrent2023 — present
- Decibel PartnersPartnercurrent2022 — presentSan Francisco Bay Area
- Merlion GamesCo-Ownercurrent2025 — presentSan Carlos, California, United States
- Nextgen PartnersBoard Member2021 — 2024
- 645 VenturesPrincipal2021 — 2022San Francisco, California, United States
- 645 VenturesVice President2020 — 2021San Francisco, California, United States
- 645 VenturesDirector Of Engineering2019 — 2020New York City Metropolitan Area
- 645 VenturesEngineer2018 — 2019
- 645 VenturesEngineering Fellow2018
- MikamaiConsulting Software Engineer2017 — 2018Milan, Lombardy, Italy
- Welcome TechnologiesLead Engineer2016 — 2017Los Angeles Metropolitan Area
- GENIUSCommunity Moderator2013 — 2017
- Smart TorvyFounder2014 — 2016
- Divet TechFounder2013 — 2016
- FreelancerFreelancer2014 — 2016
- Reign eSports (Acquired by VwS Gaming)Head of Graphics2013 — 2014
- Maker Studios IncVideo maker2012 — 2014
- YouTubePartner2012 — 2014
- The eSports RevolutionHead of Graphics2013 — 2014
- Halo ItaliaGraphic Designer & Webmaster2010 — 2014Roma
Skills & more
+2 more
Continuous IntegrationGraficaLanguages Inglese · Italiano
From Alessio's professional profile.
Investments
Led
Launchable
Investor
3BoxBigeyeBrightwaveCeramicCube DevDeepSourceDrifting in SpaceE2BJamsocketJudy SecurityLaunchableOortPanther LabsVeris
Sources: the investor's own website · curated public sources · the firm's website.
Writing
All posts ↗Colleagues at Decibel Partners
Network9
Investors connected to Alessio in public investor directories — a warm-intro map.
Frequently asked questions
- Who is Alessio Fanelli?
- Alessio Fanelli is a Partner at Decibel, where he leads Seed and Series A rounds in AI, infrastructure software, security, and developer tools. He also serves as the firm's CTO, building its internal software platform for programmatic sourcing and project tracking. Before Decibel, he was involved with 645 Ventures, where he wrote about and led investments in developer-tooling companies. He co-hosts the Latent Space podcast with swyx, which grew into a large AI Engineers community and drew over a million views in 2023. He is an active writer and open-source builder, having released tools like smol-podcaster.
- Where does Alessio Fanelli work?
- Alessio Fanelli is Partner at Decibel Partners.
- What does Alessio Fanelli invest in?
- Alessio Fanelli invests in AI & Machine Learning, Cybersecurity, Developer Tools, Enterprise Software, SaaS.
- What check size does Alessio Fanelli write?
- Alessio Fanelli typically writes checks of $1M – $6M.
- What companies has Alessio Fanelli invested in?
- Investments tracked here include Launchable, 3Box, Bigeye, Brightwave, Ceramic, Cube Dev, DeepSource, Drifting in Space, E2B, Jamsocket, Judy Security, Launchable, and 3 more.
- Where did Alessio Fanelli go to school?
- Alessio Fanelli studied at University of Rome Tor Vergata (Physics & Computer Science); Liceo Scientifico Newton; John Cabot University (Literature).
- What has Alessio Fanelli written?
- Alessio Fanelli has 1 tracked post on alessiofanelli.com, including "My 1B tokens/day OpenAI Symphony setup".
- Does Alessio Fanelli lead rounds?
- Yes — Alessio Fanelli has led 1 tracked investment.
Same school
Also attended University of Rome Tor Vergata39
+ 33 more
Also attended John Cabot University19
+ 13 more
Shared employers
Also worked at Nextgen Partners8
+ 2 more
Also worked at Welcome Technologies8
+ 2 more
Also worked at Maker Studios Inc6
Also worked at YouTube141
+ 135 more