Robby (MTF); Tim (Essence VC)
Open Source Startup Podcast
The leading podcast on how to build a successful open source company. Learn from the founders of HashiCorp, Chronosphere, Vercel, MongoDB, DBT, mobile.dev and more!
Author
Robby (MTF); Tim (Essence VC)
Category
Podcast website
Latest episode
Jun 18, 2026
Where to listen?
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Episodes
E173: Feature Flagging with OpenFeature 14.04.2025 35:03
Andrew Norris is Co-Founder & CEO of DevCycle , the leading feature flagging platform based on the OpenFeature project. OpenFeature provides a standard for feature flagging unifying tools behind a common interface and avoiding vendor lock-in at the code level. DevCycle is a product created by Taplytics , the platform for marketing and product teams to A/B test. In 2023, they raised $5M to scal...
E172: How MetalBear Makes Cloud Development 100x Faster 07.04.2025 35:22
Aviram Hassan is Co-Founder & CEO of MetalBear , the cloud development platform that lets developers run local code as if it were part of their remote environment. Their project, mirrord , has 4K stars on GitHub and is loved by users at companies like SentinelOne, Flexport, and Run.ai . In this episode, we dig into: How traditional staging environments create friction for cloud developers Thei...
E171: How Companies Like Block Build Viral Open Source Projects 03.04.2025 40:08
Manik Surtani is Head of Open Source and Bradley Axen is Principal Engineer at Block. Manik was key to launching Block's Open Source Programs Office and Bradley is a major open source contributor - including the project Goose which is Block's extensible AI agent project. It currently has over 11K stars on GitHub and has been used for a number of internal use cases at Block as well as by th...
E170: From Idea to Working Web App Using Only Python with Reflex 25.03.2025 39:19
Nikhil Rao is Co-Founder of Reflex , the open source framework to build and deploy web apps in python. Their project, also called reflex, has over 22K stars on GitHub and is a library to build full-stack web apps. Reflex has raised $5M from investors including Lux Capital. In this episode, we dig into: The power of deploying apps using only Python Balancing abstraction and code level access for us...
E169: Building New Standards for Observability - Lightstep & OpenTelemetry 19.03.2025 38:31
Ben Sigelman is the Co-Founder & CEO of observability platform Lightstep as well as Co-Creator of open source observability frameworks OpenTracing and OpenTelemetry . Lightstep was acquired by ServiceNow in 2021 and OpenTelemetry was released in 2019 and has since become the standard observability framework. In this episode, we dig into: The founding story for Lightstep - including the initial...
E168: One (Multi-Model) Database to Rule Them All - SurrealDB 04.03.2025 39:36
Tobie Morgan Hitchcock is the Co-Founder & CEO of SurrealDB , the next generation serverless cloud database for modern applications. Their open source database, also called surrealdb , has 30K stars on GitHub. SurrealDB has raised $26M from investors including FirstMark and Georgian. In this episode, we dig into: Taking a broad vs. niche approach to building a new database How coming from a no...
E167: Taking on Network Security with a Zero Trust Approach with NetBird 24.02.2025 34:50
Misha Bragin is the Founder & CEO of NetBird , the open source zero trust networking platform that allows companies and individuals to create secure private networks without the hassle of corporate networks. Their open source, also called netbird , has over 12K stars on GitHub and connects devices into a secure WireGuard-based overlay network. NetBird has raised $4M from investors including In...
E166: Making Open Source Reliable & Secure with Fossa 19.02.2025 40:06
Kevin Wang is Founder & CEO of Fossa , the product security platform that automates compliance & security across open source third party code, suppliers, and tools. In this episode, we discuss: Where Kevin's interest in open source started Learning to work with big enterprises The shift from scanning to fixing Repositioning from an engineering to security platform Resisting the market...
E165: Can DevTools Get to $1B ARR? 10.02.2025 42:52
Max Stoiber is Co-Founder & CEO of Stellate , the GraphQL edge platform recently acquired by Shopify. In this episode, we discuss: The Stellate journey from idea to initial traction to acquisition The market size (and limitations) for GraphQL, APIs, and DevTools How he ran a top-notch acquisition process for Stellate Why startups fail
E164: Taking on Auth0 with Open Source Zitadel 03.02.2025 34:02
Florian Forster is Co-Founder & CEO of Zitadel , the cloud security platform aiming to build the future of identity and access management. Their open source project, also called zitadel , provides identity infrastructure and has 10K stars on GitHub. In this episode, we dig into: The benefits of having an open source auth vendor Authentication vs. authorization Building the "GitLab for ide...
E163: Using Feedback Loops to Optimize LLM-Based Applications 27.01.2025 38:12
Viraj Mehta is the Co-Founder & CTO of TensorZero which is an open-source infrastructure platform that creates a feedback loop for optimizing LLM applications. Their open source project helps users turn production data into smarter, faster, and cheaper models. In this episode, we dig into: The benefits of feedback loops for LLMs Helping their users choose the best underlying models for their a...
E162: The AI Code Editor War with Zed 07.01.2025 30:04
Nathan Sobo is the Founder of Zed , the next-gen code editor that enables high-performance collaboration - powered by AI. Open source zed has 53K Stars on GitHub and is used by engineers at Vercel, Apple, Anthropic, and GitLab. Prior to founding Zed, Nathan created the editor Atom at GitHub which reached 1M+ active users. Zed has raised from investors including Redpoint and Root Ventures. In this...
E161: Reimagining Python Notebooks with Marimo 16.12.2024 34:14
Akshay Agrawal is the Founder & CEO of Marimo , the next generation Python notebook. Their open source reactive notebook for Python, also called marimo , has almost 9K stars on GitHub. Marimo has raised $5M from investors including AIX Ventures. In this episode, we dig into Akshay's love of building developer tools for data teams, his journey from PhD to founder, what a great developer experie...
E160: Open Source Secrets Management with Infisical 12.12.2024 39:33
Vlad Matsiiako is CEO & Co-Founder of Infisical , the open source secrets management platform. Their open source project, also called infisical , has 16K stars on GitHub and helps users sync secrets across their teams and infrastructure. Infisical has raised $3M from investors including Gradient and YC. In this episode, we dig into their path from closed to open source, their big user wins (in...
E159: Innovating on Distributed SQL Databases with Yugabyte 09.12.2024 41:41
Karthik Ranganathan is Founder & CTO of Yugabyte , the PostgreSQL-compatible distributed database for cloud native applications. Their open source database, also called yugabyte , has almost 10K stars on GitHub. Yugabyte has raised almost $300M and sits at a $1.3B valuation. They've raised from investors including Sapphire Ventures, Lightspeed, and 8VC. In this episode, we dig into the enormou...
E158: Open Source Diagramming and Charting with Mermaid Chart 05.12.2024 40:47
Andrew Firestone is CEO and Knut Sveidqvist is CTO of Mermaid Chart , the open source text-based diagraming software platform. The mermaid project has over 70K stars on GitHub and is an open source diagramming and charting tool. Mermaid Chart has raised $7.5M from investors including Open Core Ventures. In this episode, we dig into the mermaid project's 8 year journey, going from side project to c...
E157: Build Your Own Production-Grade AI CoPilots With Copilotkit 25.11.2024 36:08
Atai Barkai is Co-Founder & CEO of Copilotkit , the platform to build production-grade AI Copilots 10x faster. Their open source project, also called copilotkit , has almost 13K stars on GitHub and provides React UI + elegant infrastructure for AI Copilots, in-app AI agents, AI chatbots, and AI-powered Textareas. In this episode, we dig into Copilotkit's incredible open source growth trajector...
E156: Code-First Product Integrations with Ampersand 22.11.2024 25:53
Lauren Long is Co-Founder & CTO of Ampersand , the developer platform for native product integrations. Ampersand has raised $5M from investors including Matrix, Base Case Capital, Flex Capital, and 2.12 Angels. In this episode, we dig into their differentiation as a "code-first" product, why they focused on the GTM vertical to start (Salesforce was the first integration), why their CLI is open...
E155: Taking on Elasticsearch - the ParadeDB Story 12.11.2024 33:17
Philippe Noël is Co-Founder & CEO of ParadeDB , the modern Elasticsearch alternative built on Postgres. They're purpose-built for heavy, real-time workloads and their open source project, also called paradedb , has over 6K stars on GitHub. ParadeDB has raised $2M from investors including General Catalyst & YC. In this episode, we dig into the benefits of connecting search directly to the d...
E154: Bringing OpenTelemetry to Mobile Observability 04.11.2024 41:40
Eric Futoran is Co-Founder & CEO of Embrace , the mobile observability platform built on OpenTelemetry. Embrace has raised almost $80M from investors including NEA, Greycroft & Eniac. In this episode, we dig into the creation of mobile observability as a category and how Embrace helped evangelize it, what makes mobile observability unique, why they open sourced their SDKs, how aligning wit...
E153: Dead Simple Dev Environments with Daytona 21.10.2024 39:28
Ivan Burazin is Co-Founder & CEO of Daytona , the open source developer environment management platform. Their open source manager, also called daytona , has 9K stars on GitHub. Daytona has raised $5M from investors including Upfront Ventures. In this episode, we dig into Daytona's plan to be the fastest growing cloud development environment, how consistent and frequent content has become a hu...
E152: Taking on Bitly with Dub.co - an Open Source Alternative for Link Management 03.10.2024 31:59
Steven Tey is Founder & CEO of Dub.co , the open source link management infrastructure platform for modern marketing teams. Their open source project, also called dub , has almost 18K stars on GitHub and is used by teams at companies like Vercel, Raycast, and Perplexity. In this episode, we dig into starting Dub.co as a side project and how it ultimately turned into a company, their initial po...
E151: Taking on DBT by Combining Data Transformation with a Query Engine 30.09.2024 31:14
Lukas Schulte is Co-Founder and CEO of SDF Labs (Semantic Data Fabric), the data transformation layer and query engine platform. They're an open core company powered by the Apache Data Fusion query engine. SDF Labs has raised $9M from investors including RTP Global and Two Sigma Ventures. In this episode, we dig into the complications and pain points with the Modern Data Stack, shifting left with...
E150: Fast Analytics with Metabase 24.09.2024 39:35
Sameer Al-Sakran is CEO of Metabase , the open-source analytics and business intelligence platform. Their open source project, also called metabase , has over 38K stars on GitHub. Metabase has raised $51M from investors including NEA, Insight and Expa. In this episode, we dig into the company's 10 year journey, what it means to have a "developer friendly analytics platform", eliminat...
E149: One AI Agent to Rule Them All? 17.09.2024 36:16
Stanislas Polu is Co-Founder of Dust , the platform for companies to create and operate custom AI assistants for a range of use cases. Dust has raised $20M from investors including Sequoia. In this episode, we dig into the diverse set of users and use cases for Dust, how Dust spreads within an organization, their unique approach to open source, competing with vertical AI agents, augmenting humans...
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