Langfuse
Helicone AI
LangSmith
LangChain
Openlayer
Braintrust.dev
Portkey
PromptLayer
NiceAgents
Smith.ai
Ringzy
Retell AI
Dialzara
Play.ht
Ruby Receptionists
getBreezy
Langfuse is an open-source LLM engineering platform designed to empower developers by providing insights into user interactions with their LLM applications. We offer tools that help developers understand usage patterns, diagnose issues, and improve application performance based on real user data. By integrating seamlessly into existing workflows, Langfuse streamlines the process of monitoring, debugging, and optimizing LLM applications. Our platform's robust documentation and active community support make it easy for developers to leverage Langfuse for enhancing their LLM projects efficiently. Whether you're troubleshooting interactions or iterating on new features, Langfuse is committed to simplifying your LLM development journey.
NiceAgents builds AI agents for businesses. Two core offerings: ready-to-deploy AI answering service for SMBs, and custom AI agent development for enterprises.
AI Answering Service ($49/mo) AI receptionist answers calls 24/7, captures leads, books appointments, sends instant notifications. Industry-trained for trades (plumbers, HVAC, electricians, roofers, landscapers) and professional services (legal, dental, real estate, insurance, property management). 200 mins included, no contracts.
Custom AI Agents (from $4k/mo) Full-service AI agent development for complex business needs: - Voice Agents โ inbound/outbound calls, lead qualification, support - Workflow Agents โ document processing, data extraction, reporting - Customer Service Agents โ email, chat, SMS handling at scale - Integration Agents โ connect systems, sync data, automate handoffs
Includes discovery, design, development, deployment, 24/7 monitoring, and ongoing maintenance. You own the code.
Why NiceAgents? - Industry-specific AI trained on your terminology - Natural conversations, not robotic scripts - Integrates with Google Calendar, Outlook, Jobber, ServiceTitan, CRMs - Transparent pricing, no hidden fees, no lock-in - US-based team and support
The Problem We Solve SMBs lose $40k+/year to missed calls. Enterprises waste hours on repetitive tasks. Our AI agents handle the work humans shouldn't be doingโanswering phones, processing documents, syncing systemsโso your team focuses on growth.
Langfuse
NiceAgentsBased on our record, Langfuse seems to be more popular. It has been mentiond 28 times since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
In this project we will build a Python banking assistant agent using Strands Agents and make it observable and continuously evaluated using Langfuse โ step by step. - Source: dev.to / 9 days ago
Langfuse is the open-source standard for LLM observability. It traces every LLM interaction โ prompts, completions, latency, token usage, cost โ and provides the tooling to debug, evaluate, and optimize LLM applications in production. Think of it as "Datadog for LLM calls" with a focus on prompt engineering workflows. - Source: dev.to / 27 days ago
You're monitoring production traffic. You need Langfuse / Phoenix / Helicone / Braintrust for that. Online eval is a different problem class: implicit feedback, drift detection, hallucination rates on your data, not on HellaSwag. - Source: dev.to / about 1 month ago
Gateway or proxy attribution. A reverse proxy in front of the model-provider API records the request, computes the cost, and exposes per-customer breakdowns. Open-source options include Helicone, LiteLLM, Langfuse, and OpenLLMetry. Hosted equivalents serve as the AI cost observability layer for teams that want centralized visibility: LangSmith, Datadog LLM Observability, Arize Phoenix. Adds a network hop.... - Source: dev.to / about 1 month ago
Same approach works with Langfuse, Phoenix, Braintrust, or your existing OTel pipeline โ the metadata.userId pattern is the universal part. - Source: dev.to / about 2 months ago
Helicone AI - Open-source LLM Observability for Developers
Smith.ai - Smith.a is one of the best virtual receptionist and chat services that offer phone calls, answer chats and take messages for you and your staff.
LangSmith - Build and deploy LLM applications with confidence
Ringzy - Ringzy is an AI answering service that answers business calls 24/7 using natural AI voices. Capture leads, book appointments, and never miss a call.
LangChain - Framework for building applications with LLMs through composability
Retell AI - API that enables developers to build human-like voice agents