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Vol. 1 · A weekly on AI agentsEst. 2026

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Tools we tested

Every tool here was used on a real task before we wrote a word. Featured listings are paid and marked. Verdicts are ours and are not for sale.

6 tools · Agent framework · Browser automation · Workflow automation · Observability

No. 01

Agent framework

LangGraph

Graph-based orchestration for stateful, multi-step agents. Steep learning curve, but the checkpointing and human-in-the-loop support are the best we've used.

Verdict
Recommended for production agents
Rating
●●●●◐
Pricing
Open source; paid cloud platform
Tested
2026-10

No. 02

Agent framework

CrewAI

Role-based multi-agent crews with a friendly API. Fast to prototype, but debugging long runs takes patience.

Verdict
Good for prototypes and demos
Rating
●●●●○
Pricing
Open source; paid enterprise
Tested
2026-10

No. 03

Agent framework

Claude Agent SDK

Anthropic's SDK for building agents with tool use, file access and subagents. Opinionated, and the defaults are sensible.

Verdict
Recommended if you're on Claude
Rating
●●●●◐
Pricing
Free SDK; pay per token
Tested
2026-11

No. 04

Browser automation

Browser Use

Lets an LLM drive a real browser. Works well on simple forms; struggles on sites with heavy anti-bot measures.

Verdict
Useful with supervision
Rating
●●●◐○
Pricing
Open source; paid cloud
Tested
2026-09

No. 05

Workflow automation

n8n

Visual workflow builder with AI agent nodes. The best option when non-developers need to own the automation.

Verdict
Recommended for ops teams
Rating
●●●●○
Pricing
Free self-hosted; cloud from $20/mo
Tested
2026-10

No. 06

Observability

Langfuse

Open-source tracing and evals for LLM apps. Easy to add, and the trace view makes agent loops much easier to debug.

Verdict
Recommended
Rating
●●●●◐
Pricing
Free self-hosted; cloud free tier
Tested
2026-11

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