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COSS Weekly #142

Here's the one-hundred forty-second issue of COSS Weekly, the global commercial open source (COSS) company category newsletter, brought to you every weekend by the team at OSS Capital, creators and stewards of COSS Community and Open Core Summit.

We deliver only the most fresh 😋 news from the previous week in COSS across: Funding, Content, Jobs, Liquidity and $COSS (Public Markets).

Last week saw $183M in funding announcements from Tenstorrent, Neon, Socket, eProcessor, Reflex, and Polars, discussions on Open Source licenses, updates from Plane, and more!


💰 COSS Funding: $183M

  • Tenstorrent, an AI hardware company, announced a $100M strategic up-round co-led by Hyundai Motor Group and the Samsung Catalyst Fund. Link
  • Neon, a serverless relational database, announced their $46M Series B led by Menlo VC. Link
  • Socket, securing the software supply chain, announced their $20M Series A led by a16z. Link
  • eProcessor, producing energy efficient RISC-V cores to compete with x86 and Arm, are building with €8 million in funding. Link
  • Reflex, helping deploy Python as web apps, announced their $5M Seed led by Lux Capital. Link
  • Polars, a dataframe library for Rust and Python, announced their $4M Seed led by Bain Capital Ventures. Link

📚 COSS Content

  • Heather Meeker: "Interesting article. It still matters what open source means, but there is no definition of open source for ML models yet. (If you want to help write a definition, visit The open source licensing war is over via @infoworldLink

  • Moritz von Contzen: "@calcom made it into YC's cofounder matching platform as a default calendar service 👀 Probably nothing.

  • Vihar Kurama: "last 10 days were crazy at @planepowers, we prioritised all the feedback we got from the community, - requests from our discord - comments on Reddit - requests from teams of size 50+ - and many more super pumped for the next release, dropping tomorrow. stay tuned." Link

  • JJ --- e/acc: "When something is deeply paradoxical, nuanced and yet proven to work in many instances... great opportunities exist. Open source startups, for example." Link

  • Umbrel ☂️: "Introducing a new feature in our Nostr Relay app for Umbrel 🚀 Now you can sync your private relay on Umbrel with public relays, and back up past & future Nostr activity, even if the connection between your client & your private relay goes down ✨ →

  • Plane: "‼️ Need help with self-hosting? We've got you. 👀 Got feedback on onboarding? We're all ears. 🪲 Found a bug with tooltips? We fixed it. Here's to countless moments like these---celebrating 1000 members on our Discord. Thank you, Plane community. 🙏🎉🙌

  • COSS Community 🌏: "@planepowers" [Link](

  • Open Source Startup Podcast🎙: "Ep 98 of the Open Source Startup Podcast features @pauldix, Co-Founder & CTO of time series data co @InfluxDB⏱ InfluxData was early to the time series data category, and this episode is packed with learnings around category creation, monetization & more!

  • JJ --- e/acc: "The government is being heavily pressured to ban open source. How can we prevent this? By campaigning in favor of open source and electing officials who understand the fundamental importance of it.

  • Matt Mullenweg: "WordPress offers 1 million free transfers for domains at Google Domains via @domainnamewireLink

  • VentureBeat: "How MIT's Liquid Neural Networks can solve AI problems from robotics to self-driving cars

  • Axios Pro: "Exclusive: Stripe names Confluent executive Steffan Tomlinson as CFO

  • Adam Jacob: "Another day, another moment where Open Source gets rebranded to mean open as long as you don't compete with me: - which is fine, if that's what you want to do. But no, it isn't open source." Link

  • JJ --- e/acc: "'It's perfectly acceptable to profit from open source code but companies that do so need to operate with an extremely high level of transparency.' Exactly correct.

  • Sid Sijbrandij: "Red Hat's licensing loophole makes people choose between open source freedoms or Red Hat services. It's technically legal, not at all transparent, and fueling the flames of competition among Linux distributors.

  • Eliot: "Of the first 20 hires at MongoDB, only a few of them would have been considered database experts. Of the first 20 hires at @viamrobotics, only a few of them would be considered an expert in robotics. Notice a trend?" Link

  • Product Hunt 😸: "This 15-year-old French boy built an open-source, DIY phone that cost only 30 €. The entire project is open source, both the hardware design and the software.

  • JJ --- e/acc: "Closed source technology is aligned with its owner. Open source technology is aligned with you." Link

  • Emily Omier: "This week Markus Düttman (@duettmann), Principal at Nauta Capital joins me to chat about the European open source ecosystem. The Business of Open Source:

  • Sequoia Capital: "When @laurenmhreeder and @BogieBalkansky were thinking about creating the Sequoia Open Source Fellowship @tiangolo is the first name that came to mind. Learn how @tiangolo developed @FastAPI, an open-source framework for software developers worldwide.

  • Runa Capital: "Are you looking for the hottest open-source startups 🔥? Look no further than the ROSS Index 🚀! The latest vintage is out today and features the top 10 fastest-growing startups in Q2 2023 😛

  • Emily Omier: "'I like the open core model because it forces you to think about your product. You need to understand your product and your users extremely well.' - Markus Düttman (@duettmann) The Business of Open Source:\

  • JJ --- e/acc: "This article says COSS founders are 'leaving' Europe. The reality is a bit different and nuanced...\
    @OSSCapital has led incorporation-stage seed rounds in more than a dozen EU-based COSS startups over the last 18 months. Our data indicates that once teams go from a few people to..." Link

    • * * \ *💸 COSS Liquidity (M&A + IPOs)**
  • Jamin Ball: "Confluent quarter: - $189M rev (+36% YoY) vs $182M consensus (4% beat) - $195M next Q guidance vs $194M consensus - Raised full year guide by 1% - $84M cloud rev (+78% YoY) - >130% DBNR - 35 months GM adj. CAC payback - 69% GM - (19%) FCF Margin $CFLT" Link

🛠️ COSS Jobs

  • 3,509 jobs and 293 companies hiring! Link

📊 $COSS - Public Markets

  • $COSS markets down 2.11% last week
  • Latest $COSS markets snapshot below as of market close last Friday courtesy of Koyfin.

Koyfin market data

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