W23
Acquired
Arroyo
Developer Tools
Cloud-native stream processing
Open Source
18 dead or acquired startups in Open Source with completed research reports.
Every startup playbook in our database, ready to build
Each deep-dive includes a post-mortem, step-by-step rebuild plan, and a technical spec you can paste straight into Claude Code, Cursor, or Lovable.
S19
Acquired
Bun
Developer Tools
Bun is an incredibly fast all-in-one JavaScript toolkit
S13
Acquired
CoreOS
Open Source
Open source tools of modern distributed systems.
W23
Acquired
DAGWorks Inc.
AIOps
Open source tools & services for reliable AI Agents & AI Applications
S20
Acquired
Fig
Developer Tools
Fig adds visual apps, shortcuts, and autocomplete to your terminal.
S23
Acquired
FlowiseAI
Artificial Intelligence
Open source GenAI development platform
W23
Acquired
Helicone
AIOps
LLM Observability for Developers
S22
Acquired
HyperDX
Developer Tools
Open-source, dev-friendly observability.
W23
Acquired
Langfuse
Developer Tools
Open source LLM engineering platform
S22
Inactive
Lotus
Fintech
Open-Core Pricing and Billing Engine
S23
Acquired
OpenPipe
AIOps
Turn expensive prompts into cheap fine-tuned models
W21
Acquired
Pyroscope
Developer Tools
Open source continuous profiling software to debug performance issues
W20
Acquired
Replicate
Developer Tools
Run machine learning models in the cloud
W22
Acquired
Requestly
Developer Tools
Open-Source Postman alternative
S09
Acquired
RD
RethinkDB
Open Source
The open source database for the realtime web.
W25
Inactive
Sublingual
Developer Tools
Daily productivity tracker
W23
Acquired
Traceloop
Developer Tools
Know what your LLM is doing — and why it’s failing
W24
Acquired
Trieve
Developer Tools
All-in-one API for search, RAG, & recommendations