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Guides
Practical, sourced guides to building, choosing and running AI agents, how the frameworks and platforms actually work, what they cost, and when to trust them.
- Published
- 09
- In research
- 00
- Topics covered
- 48
- Last updated
- July 2026
AI Agent Pricing in 2026: 40 Tools Analyzed
We researched the pricing model, free tier and API access for all 40 AI agents in our index — freemium leads at 40%, and 80% offer some free access.
LangChain vs CrewAI vs LlamaIndex vs AutoGen vs Pydantic AI vs OpenAI Agents SDK vs Mastra vs Letta: How to Choose
All 8 agent frameworks in our index compared side by side — what each is actually for, live GitHub star counts, and a decision framework for picking the right one for what you’re building.
Decagon vs Sierra vs Intercom Fin vs Crescendo vs Cresta vs Ada: How to Choose an AI Support Agent
All 6 customer-support agents in our index compared side by side — self-serve software, enterprise sales-led software, a fully-managed service, and a platform built to augment human agents rather than replace them are four genuinely different ways to buy one (Ada and Decagon both sit in the sales-led bucket, a decade apart in maturity), and the right pick depends on which of those you actually want.
Vapi vs Retell AI vs Bland AI vs ElevenLabs vs LiveKit vs PolyAI: How to Choose an AI Voice Agent
All 6 voice agents in our index compared side by side — a self-hosted compliance platform, two developer-first bring-your-own-stack builders, a voice-quality specialist, an open-source framework and a pre-LLM-era enterprise incumbent that just opened a self-serve tier are six genuinely different starting points, and the right pick depends on which layer of the stack you actually want to own.
Clay vs 11x vs Artisan vs Qualified vs Rox: How to Choose an AI Sales Agent
All 5 sales-and-marketing agents in our index compared side by side — a GTM data/enrichment engine, two autonomous outbound AI SDRs, an inbound AI SDR now owned by Salesforce, and a per-account CRM-monitoring agent swarm are five different tools solving five different problems, not five competing chatbots.
n8n vs Lindy vs Relevance AI vs Dify vs Sierra: How to Choose an AI Agent Platform
All 5 agent platforms in our index compared side by side — n8n, Lindy, Relevance AI and Dify split on licensing philosophy (open-source, self-hostable developer tools versus closed-source, no-code SaaS builders); Sierra is a fifth shape entirely, a fully-managed enterprise support-agent platform with no self-serve tier at any price.
IDE Assistant, Terminal Agent, or Autonomous Engineer: How to Choose an AI Coding Agent (14 Tools Compared)
Coding agents is our biggest category — 14 tools — and "which is best" is the wrong question, because they split into three genuinely different products: an in-editor assistant, a terminal harness you script, and an autonomous engineer you delegate a whole ticket to.
Web Answers, Full Task Automation, Academic Literature, or Legal Research? How to Choose an AI Research Agent (Perplexity vs Manus vs GPT Researcher vs Elicit vs GC AI)
All 5 research agents in our index look like rivals from the "research agent" label alone, but each is genuinely built for a different job — a general web answer engine, a broad autonomous task agent, an open-source self-hosted pipeline, a tool scoped specifically to scientific literature, and a fifth scoped specifically to US legal research.
Framework, Platform, or Ready-Made Agent? The Decision to Make Before You Compare Any Tools (2026)
Every one of our 7 category comparison guides assumes you already know you want a framework, a platform, or a ready-made agent — this is the decision that comes before any of them: what you're actually buying, at three fundamentally different levels of the stack, using our own 49-tool index to show the real cost and control tradeoff at each level.
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