📖 The AI Tool Bible

Agents

Autonomous and orchestrated multi-step AI workers.

188 tools

Why it matters

The agent ecosystem is the youngest category here — frameworks, orchestrators, and end-to-end autonomous workers are evolving fast, with reliability and observability still maturing.

What's in here

Includes orchestration frameworks (LangGraph, CrewAI, Claude Agent SDK), end-to-end product agents (Devin, Manus), and open-source platforms (AutoGPT, OpenAI Swarm).

How to pick

Pick LangGraph when production reliability matters. Pick CrewAI for fast multi-agent prototyping. Pick Claude Agent SDK if you're Claude-aligned. Use Devin / Manus when you want a finished agent product, not a framework.

Browser Use

Agents · Multi-model (BYO LLM; Claude in hosted Box)
8.2

Open-source browser automation harness and cloud platform for LLM agents that drive real websites.

Freemium· Free open-source library; cloud usage-based with free tier and enterprise plansweb-automationscraping

Daytona

Agents
8.2

Secure, isolated sandboxes for running AI-generated code with sub-90ms cold starts.

Freemium· Pay-per-second from $0.000014/sec; $200 free creditagent-sandboxescode-interpreters

Hermes Agent

Agents · Multi-model (300+ via Nous Portal)
8.2

Open-source multi-channel AI agent with persistent memory, scheduling, and subagent delegation from Nous Research.

Freemium· MIT-licensed self-host free; managed Portal tiers Free/Plus/Super/Ultra with creditspersonal-assistanttask-automation

Sim

Agents · Multi-model (Claude, OpenAI, Google)
8.2

Open-source visual workspace for building, deploying, and monitoring AI agents.

Freemium· Free (1,000 credits/mo); Pro $25/user/mo; Max $100/user/mo; Enterprise customagent-workflowsinternal-automation

Vellum

Agents · Multi-model (Claude-class LLMs)
8.2

Personal AI assistant with persistent memory across email, calendar, and chat channels.

Freemium· Free tier + API costs; paid plans availablepersonal assistantemail triage

Langflow

Agents · Multi-model
8.1

Open-source visual builder for LangChain-style AI agents and RAG pipelines.

Freemium· Open-source free; hosted free tier + paid enterprise via DataStaxagent-prototypingrag-pipelines

Mastra

Agents · Multi-model (90+ providers)
8.1

Open-source TypeScript framework for building, deploying, and observing AI agents and workflows.

Freemium· Free open-source core (Apache 2.0); Enterprise license availableai-agentsworkflow-orchestration

CAMEL-AI

Agents · Multi-model
8.0

Open-source Python framework for building multi-agent systems and synthetic data pipelines.

Free· Free, open-source; pay for the underlying LLM API callsmulti-agent-systemssynthetic-data-generation

Gemini CLI

Agents · Gemini 3
8.0

Google's open-source terminal agent that brings Gemini 3 into your shell for codebase edits and workflow automation.

Freemium· Free tier with Google account; paid via Google One / AI subscriptionsterminal-coding-agentcodebase-editing

MiniMax

Agents · MiniMax M3, Hailuo 2.3, Speech 2.8, Music 2.6
8.0

Chinese frontier-model lab shipping multimodal foundation models with a 1M-context coding/agent stack.

Freemium· Free tier; Token plan from ~$20/mo (~12.5B tokens); enterprise pricing on requestcoding-agentlong-context

OpenHands

Agents · Multi-model (Claude, Gemini, GPT/Codex)
8.0

Open-source autonomous coding agent that plans, edits, and ships changes across real codebases.

Freemium· Free OSS tier; paid Team plan; Enterprise quoteautonomous-codingpr-review

Rivet

Agents · Multi-model
8.0

Open-source visual IDE for building and debugging LLM agent graphs.

Free· Free and open source (MIT)agent-orchestrationprompt-chaining

Atua

Agents · Multi-model (BYO key)
7.9

Keyboard-summoned macOS AI assistant that reads your screen and drives system apps with your own API keys.

Paid· One-time $29, lifetime updates, 7-day refundmacos-assistantscreen-context

Khoj

Agents · Multi-model
7.9

Open-source personal AI that builds agents, searches your documents, and automates research across local files and the web.

Freemium· Free self-hosted; paid cloud tier on app.khoj.devpersonal-knowledge-baseagent-building

Manus

Agents · Multi-model
7.9

Generalist agent for research, code, and web tasks.

Paid· Credit-based; tiers from $19/moresearchweb tasks

DataRobot

Agents · Multi-model
7.8

Enterprise platform for building, deploying, and governing AI agents alongside classic predictive ML.

Enterprise· Contact sales; free trial availableenterprise-agentspredictive-ml

Devin

Agents · Multi-model (Claude / GPT configurable)
7.8

Cognition Labs' "autonomous software engineer" agent.

Paid· From $500/mo Coreautonomous codingticket resolution

Limitless

Agents · Proprietary (multi-model)
7.8

AI wearable pendant that records and transcribes your conversations into a searchable personal memory.

Free· Free for existing customers post-Meta acquisition; no longer sold to new buyersmeeting-transcriptionpersonal-memory

Modzy

Agents · Multi-model
7.7

Enterprise ModelOps platform for deploying and running AI/ML models across cloud, on-prem, and edge.

Enterprise· Contact salesmodel-deploymentedge-ai

AutoGPT

Agents · BYO (Claude / GPT / open)
7.5

Open-source platform for building autonomous AI agents.

Free· Free / open-source; hosted platform paidautonomous agentstask automation

Headroom

Agents · Model-agnostic (Anthropic, OpenAI, Vertex, Bedrock, Azure, 100+ via LiteLLM)
7.4

Open-source context compression layer that strips 70-95% of boilerplate before it hits your LLM.

Free· Apache 2.0 open source; free for commercial usetoken-compressionagent-context

Model Context Protocol

Agents · Model-agnostic
7.4

Open standard that lets AI apps plug into data sources, tools, and workflows like USB-C for LLMs.

Free· Free and open source (MIT)agent-toolingide-integrations

OpenAI Swarm

Agents · OpenAI models (designed for, but extensible)
7.4

Lightweight multi-agent orchestration in Python.

Free· Free / open-sourceeducationprototyping

OpenCLI

Agents · GPT-3, GPT-2
7.4

Open-source bridge that hands your already-logged-in Chrome session to a CLI and AI agents.

Free· Free and open-source (Apache-2.0)browser-automationagent-tooling