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How to build a business agent system

Start from one workflow with a measurable outcome, such as resolved tickets or hours saved. Customer support, sales ops, back office and finance, and an internal or IT helpdesk are the jobs this guide is aimed at. Anthropic's engineering post says: "the most successful implementations weren't using complex frameworks." Start simple, and add autonomy only when you need it.

The groups below are the stack: no-code workflows, agent SDKs, a durable runtime, memory, evals, a gateway for guardrails and spend, a support agent you can buy, and connections to other tools. Tools are alphabetical inside each group. This is not a scored ranking.

Building effective agents · Anthropic

How to choose

Use n8n, Zapier, or Make when the workflow should be a no-code scenario with an AI step. Use LangGraph, CrewAI, the OpenAI Agents SDK, or the Claude Agent SDK when the agent is code. Use Temporal or Inngest when a run has to retry, resume, or stay on a schedule. Use Mem0 or Zep when the agent has to recall facts, or keep your own store. Use Langfuse, Braintrust, or Arize AX when you need a trace and an eval. Use Portkey when you need budgets, fallbacks, caching, or guardrails in front of the model. Use Intercom Fin when the job is resolving support tickets and handing the rest to a person. Use Bivia when the agent needs a typed decision and a confidence score, including over MCP.

The same jobs and layers are listed as use-case categories. Sales ops, back office, and IT helpdesk do not have a verified tool in this directory yet.

Workflow automation with AI steps

n8n, Zapier, and Make are the no-code tools named for workflows with AI steps. n8n can be self-hosted, and its pricing includes a free Community Edition. Zapier's description includes Zapier Agents, Chatbots, and Zapier MCP. Make is a visual scenario builder billed in credits. Paid prices for Make were not visible on the pricing page at the last check, so the listing quotes the free plan only.

Orchestration and agent SDKs

LangGraph, CrewAI, and the OpenAI Agents SDK were already listed. The Claude Agent SDK is Claude Code's agent loop as a Python and TypeScript library, with tools, hooks, subagents, MCP, permissions, and sessions. CrewAI also has a hosted platform. The OpenAI Agents SDK and CrewAI describe human-in-the-loop checks, and the Claude Agent SDK describes permissions.

Durable runtime

Temporal and Inngest run work durably. Temporal can run OpenAI Agents SDK and Google ADK model and tool calls as durable activities, with an open-source self-hosted option. Inngest is an open-source SDK for event-driven functions and agents, with retries, concurrency, tracing, and sandboxes.

Memory and context

Mem0 is a memory layer for agents, with an MCP integration, OpenMemory, and graph memory on custom plans. Zep is a temporal context graph for agent memory, with a Context MCP Server. Letta was already listed for agents that keep memory over time. The same layer can be your own store, for example Notion or a database.

Evals and observability

Langfuse is open-source tracing, prompt management, evals, and cost tracking, and self-hosting is free. Braintrust is a tracing and evaluation platform with scorers, human review, and a Loop agent. Arize AX traces agents and runs evals with OpenTelemetry, and Phoenix is open source and local-first. LangSmith tracing, evals, deployment, and an LLM gateway are part of the LangChain platform already listed as LangChain and LangGraph.

Guardrails, approvals, and cost control

Portkey is an AI gateway with fallbacks, caching, budgets, guardrails, observability, and an MCP gateway, and an open-source gateway is available. n8n describes human approval for tool calls. Those workflow and SDK listings stay in the groups above.

A support agent you can buy

Intercom Fin resolves support tickets across chat, email, and phone, and it works with existing helpdesks. Its pricing page lists $0.99 per Fin outcome. Customer figures quoted by Intercom are labelled as vendor claims later on this page.

MCP servers and tool connectivity

Composio connects an agent to apps such as GitHub, Slack, and Gmail and handles sign-in. Pomerado turns a website into an API and MCP server an agent can call. Bivia returns a typed decision and a confidence score, and the product page says you can add it as an MCP server in a coding agent. Zapier MCP is part of the Zapier description in the workflow group.

Production patterns

  • Put an approval in front of an irreversible action, including an outbound message or a spend.
  • Keep a trace for every run.
  • Build eval datasets from real failures.
  • Notice when the price is per outcome. Intercom lists Fin at $0.99 per outcome.
  • Retries need idempotency, so a step that runs twice does not do the work twice.
  • Give the agent least-privilege credentials for the tools it can call.

Vendor claims

These figures are vendor claims. AgentAtlas has not measured them.

  • Robin, an Intercom customer: "50% resolution rate".

    Vendor claim, quoted by Intercom. AgentAtlas has not measured this.

  • Synthesia, an Intercom customer: resolution time down 96%.

    Vendor claim, quoted by Intercom. AgentAtlas has not measured this.

Buy or build

Hosted plans are in the buy column. Libraries and self-host options are in the build column. Prices are the ones on each listing.

LayerBuyBuild or self-host
WorkflowZapier, Make, or n8n Cloud.n8n's free Community Edition. The pricing page says a standard version can be self-hosted.
Agent logicCrewAI's hosted platform, which lists a free plan of 50 workflow executions a month and custom Enterprise pricing.LangGraph, the CrewAI framework, the OpenAI Agents SDK, or the Claude Agent SDK.
RuntimeTemporal Cloud, or Inngest's hosted plans.Temporal's open-source server, or Inngest's open-source SDK.
MemoryMem0 or Zep hosted plans.Your own store, for example Notion or a database.
EvalsLangfuse's hosted plans, Braintrust, or Arize AX.Self-hosted Langfuse, which is free, or Phoenix, which is open source.
Cost controlPortkey Production, listed at $49 per month. The Developer plan is free and includes 10,000 logs.Portkey's open-source gateway.

Categories

Other guides

20 tools in this guide on AgentAtlas. Each card links to the listing, and the listing links to the official site.