Blog

An AI agent is a model in a loop with tools and a way in. Here is the definition, the four parts, the types that actually exist, and what most vendors call an agent that is not one.

A chatbot follows branches a human wrote. An agent decides and calls tools. Here is the real difference, the same request handled both ways, and the cases where the chatbot is still correct.

LangGraph, CrewAI, the OpenAI Agents SDK, the Vercel AI SDK and Mastra do not compete as much as it looks. Here is the stack they sit in, and the layer none of them cover.

An agent with an email address can read threads, open attachments and reply. Here is what that requires: domain setup, inbound routing, threading, and the deliverability nobody warns you about.

Evolution API is free, runs in minutes and asks Meta for nothing. It is also an unofficial client. What you get, what you accept along with it, and when to move to the Cloud API.

Building the agent takes an afternoon. Getting your client's WhatsApp connected is what kills the margin. Here is the business model, the arithmetic, and the onboarding step that decides whether it scales.

Eight CPaaS vendors compared on channels, pricing model and who each one is genuinely built for. Includes where we are the wrong answer.

Omnichannel is not being on several channels. It is the customer continuing one conversation across them. What that requires of a platform, and how to tell whether yours does it.

Seven Twilio alternatives compared on pricing, channels, and developer experience. Real numbers, honest trade-offs, and a guide to choosing by use case.

Twilio advertises $0.0083 per SMS. The real US cost is $0.012 to $0.013 once carrier fees, 10DLC registration, and number rental land on the bill. Full breakdown with the math.

The three ways to send bulk WhatsApp messages, which one scales without ban risk, what Meta charges, and the step-by-step with Zavu's Broadcasts API.