AgentsIndex · Blog
AI Agent Guides, Comparisons, and Tutorials
Guides, comparisons and tutorials for choosing and using AI agents.
NewestBuyer's guide
AI agent tools that let you take your data out
ClineFlow, AgentMail and Automater let you take your data out in full, while UI Discovery, AgentQL, Arcmira and Wash Bodega do so only in part.
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Buyer's guides
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The best agent tools and integrations for developers
Arcade.dev, AgentQL and Chroma fit developers building agents best, each free to start; check where free plans stop and how agents sign in.
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AI Marketing Agents: Which Produce Work You Can Ship
Five AI marketing agents ranked on one test: does a human approve the output before it reaches a customer, or does it post on its own? Pricing and gaps.
Buyer's guide
AI Design Agents for Teams Without a Designer
Gamma vs. Beautiful.ai for decks, and three ad-creative generators compared by cost per asset, verified against each vendor's own pricing page today.
Buyer's guide
Security AI Agents: What They Monitor and What They Miss
AI security agents do four jobs: runtime gateways, red-teaming, SOC detection and governance. Each has a published blind spot, so pick by the job.
Buyer's guide
No-Code AI Agent Builders: What You Give Up vs Code
Some no-code builders hand you exportable code; others keep your agent only in their database. Which is which, and what happens if the vendor shuts down.
Buyer's guide
AI Sales Agents a Small Team Can Actually Afford
What a 1-5 person sales team pays for an AI SDR in 2026: the real self-serve floor, the seat-minimum traps, and who stopped publishing prices.
Comparison
Best AI Coding Agents in 2026: 10 Tools Compared
The 10 best AI coding agents in 2026, Claude Code, Cursor, OpenAI Codex and GitHub Copilot among them, compared by SWE-bench score, pricing and fit.
Buyer's guide
Best Free AI Agents: 10 Tools With Real Free Tiers
Ten free AI agents with real free tiers and no trial bait, with current pricing and the limits and use cases that matter.
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Best AI Agents for Sales: Three Kinds and How to Choose
AI agents for sales split into 3 categories, not one. Compare 11x.ai, Artisan Ava, Apollo.io, Clay, and Coldreach AI by use case, price, and ROI.
Comparisons
All 22
Buyer's guide
Aissist.io review (2026): pricing, pros and cons
Aissist.io resolves tickets inside your helpdesk, billed per interaction with a free plan; it suits smaller support teams but has no public API.
Buyer's guide
superbot review (2026): pricing, pros and cons, alternatives
superbot runs errands, admin and scheduled tasks on your computer, free to start with paid credit plans, for busy people, but promises no uptime.
Comparison
Daytona vs E2B vs Modal: Which Sandbox for Agent Code?
Daytona, E2B and Modal compared on sandbox pricing, concurrency, GPU support and open-source status, plus why Daytona's flagship repo is now archived.
Comparison
ChatGPT vs Claude: Which One Should You Use?
ChatGPT vs Claude compared on free-tier features, pricing, and context window. Which one to pick depends on what you actually need.
Buyer's guide
Hyper review (2026): an autonomous coding agent that ships verified pull requests
Hyper plans, tests and delivers pull requests to your GitHub repository from an isolated cloud sandbox, with a verification check on each one and a hard spending cap on every run.
Buyer's guide
ERIUS PHONE review (2026): pricing, pros and cons
ERIUS PHONE rents AI agents real cloud Android phones they drive by API, priced monthly per phone in euros, but it offers no webhooks.
Comparison
VeraDial vs CallingYouNow vs DialNexa vs Workforce Wave
VeraDial, Workforce Wave, DialNexa, and CallingYouNow compared on real pricing and integrations, plus why VoiceFleet isn't a live product.
Comparison
Beam AI, Stack AI, Gumloop and More: Which Can You Buy?
We checked all six pricing pages today. Only BuildShip has a real self-serve ladder. The other five gate you behind a sales call or a $500+/month floor.
Comparison
Which Browser Automation API Should You Build an Agent On?
Skyvern, Browserbase, Browser Use, Playwright MCP, Hyperbrowser, and TinyFish compared on credential handling, session isolation, and audits, not speed.
Comparison
LiteLLM vs Portkey vs Helicone for Production Traffic
LiteLLM, Portkey and Helicone AI Gateway compared on license terms, real cost at volume and maintenance, now that Palo Alto Networks owns Portkey.
Comparison
Search, Crawl or Extract: Which Web Data API to Use
Tavily, Exa, Firecrawl, Apify, Crawl4AI and AgentQL compared by job and by price at real usage, plus what Cloudflare's AI-crawler block means for them.
Comparison
Agent-to-App Platforms: Composio, Nango, Merge and More
Composio, Nango, Arcade.dev, StackOne and Merge price usage three different ways. Which one is cheap for your workload, and which two are off the table.
Comparison
Harvey, Legora, CoCounsel or Spellbook: Which Legal AI Tool?
Harvey and Legora compete for the same enterprise buyer, CoCounsel is sold by practice area, and Spellbook reviews contracts in Word. Which fits which job.
Comparison
Which AI Medical Scribe Now That Epic Ships Its Own?
Epic's Chart with Art is live at 300+ health systems. Here's how Abridge, Ambience, and Nabla actually compare now that Epic's native scribe has shipped.
Comparison
AI Model Providers Compared: What One Workload Costs
OpenAI, Anthropic, Google, Groq, DeepSeek, Mistral and more compared on real per-token cost, context windows, and the rate limits that bite in production.
Comparison
Vector Database or Memory Layer: Which Does Your Agent Need?
Vector databases and agent memory layers solve different halves of one problem. Which to pick, and the point where Postgres stops being enough.
Comparison
Workflow Automation for AI Agents: Where Free Tiers End
Zapier, Make, n8n, Activepieces, Pipedream and Trigger.dev meter in six different units. Which free tier survives real agent work, which runs out first.
Comparison
AI coding agents compared: what each one is actually good at
Every major coding agent now costs $20. We compare what that money actually buys, which projects are still maintained, and which tool fits which job.
Buyer's guide
TinyFish Review: One API for Search, Extraction and Agents
TinyFish: one API for live web search, page fetching, cloud browsers and multi-step agents. What it does, how its pay-as-you-go pricing works, who it fits.
Comparison
AG2 vs CrewAI: A Full Comparison and the AutoGen Rebrand
AG2 (formerly AutoGen) vs CrewAI on architecture, pricing, benchmarks and enterprise readiness. CrewAI has 1.3M monthly installs; AG2 is free under MIT.
Comparison
Cline vs Cursor: Which AI Coding Agent Should You Use?
Cline vs Cursor: an open-source agent you bring your own key to, against a proprietary AI IDE. Pricing, MCP Marketplace, background agents, which to pick.
Comparison
CrewAI vs LangGraph: Which Framework Should You Build With?
CrewAI gets a prototype running in about 20 lines of code. LangGraph leads in production with 34.5M monthly PyPI downloads. Which fits your use case.
Market and data and guides
All 3 market and data All 3 guides
Buyer's guide
AI Recruiting Tools and the EU AI Act: What Applies Now
The hiring high-risk deadline moved to 2 December 2027, but the emotion-recognition ban is already live. What four AI recruiting vendors disclose.
Comparison
AI Support Agents: What Each Costs per Resolved Chat
Published prices for 21 AI support agents, converted to one comparable number: cost per conversation the AI closed on its own. Verified 13 Aug 2026.
Comparison
Which AI Agent Frameworks Are Really Open Source?
Licenses, stars and last-commit dates for 15 AI agent frameworks, plus the four ways "open source" stops being true once you ship.
Tutorial
Google's A2A Protocol: How AI Agents Talk Across Frameworks
Google's Agent2Agent (A2A) protocol launched in April 2025 and grew past 150 supporters. How it works, how it differs from MCP, and its security findings.
Tutorial
Multi-Agent Systems: How They Work and When to Use Them
Multi-agent systems in 2026: hub-and-spoke, flat mesh and hierarchical designs, the MCP and A2A protocols, ROI benchmarks and how to pick an architecture.
Tutorial
Types of AI Agents: A Complete Guide From Theory to Practice
Ten types of AI agents: the five classical types from Russell and Norvig and five modern LLM-based ones, with examples and when to use each.