Open Source Projects using Fern
A curated collection of the 4 best open source software using Fern. Find the most popular and trending open source projects to learn from, contribute to, or use in your own projects.
Structured control layer for customer-facing AI agents
Stars
18,275Last commit
2 months agoLicense
Apache-2.0
A conversational AI server that manages agent behavior through context-aware guidelines, keeping responses consistent, auditable, and aligned at scale.
Open Source Alternative to:
Open source LLM engineering platform for AI-powered applications
Stars
34,205Last commit
5 hours agoLicense
MIT
Langfuse provides tracing, evaluations, prompt management, and analytics to debug and improve LLM applications.
Open Source Alternative to:
Automate any website workflow with AI and computer vision
Stars
22,929Last commit
5 hours agoLicense
AGPL-3.0
Transform manual browser tasks into automated workflows using AI. Handle complex forms, CAPTCHAs, 2FA, and data extraction across any website at scale.
Open Source Alternative to:
Build stateful backends with in-memory actors
Stars
6,108Last commit
5 hours agoLicense
Apache-2.0
Open-source infrastructure for long-lived, in-memory processes called Actors. Combines state and compute with sub-millisecond latency, realtime capabilities, and horizontal scaling.
Open Source Alternative to:
Sent – Messaging Infrastructure for Developers. One API for SMS, WhatsApp, and RCS across 190+ countries.
Sent