Best Free AI Agent tools

Rewisp is an on-device ambient memory for Mac that captures text from your screen and lets you ask anything about your past activity, automatically surfacing promises, changes, and summaries while keeping everything private.

Backtest crypto trading strategies by describing them in plain English, directly from Claude, ChatGPT, or any AI agent.

Open-source platform for real-time AI agent security, auditing skills and runtime with community-driven threat rules.

SureWire Beta is an AI agent validation platform that helps ensure your AI agents are safe and reliable through comprehensive testing.

Run multiple AI coding agents in parallel on isolated git worktrees with a full editor and built-in developer tools.

An open-source cost controller for AI agent loops that stops loops when converged and rolls back before degradation.

Open-source tool running specialized AI agents to review code, sync docs, perform deep QA testing, and distill repository knowledge on a schedule.

Open-source CLI, debug agents, and browser tools for building and maintaining reliable web integrations.

Local-first AI operator that controls your Windows PC, files, shell, apps, browser, and desktop, with voice and memory, all on your machine.

The fastest way for an AI agent to raise capital on-chain by issuing bonds, with no account, no middleman, and no platform fees.

Rewisp is an on-device ambient memory for Mac that captures text from your screen and lets you ask anything about your past activity, automatically surfacing promises, changes, and summaries while keeping everything private.

Backtest crypto trading strategies by describing them in plain English, directly from Claude, ChatGPT, or any AI agent.

Open-source platform for real-time AI agent security, auditing skills and runtime with community-driven threat rules.

SureWire Beta is an AI agent validation platform that helps ensure your AI agents are safe and reliable through comprehensive testing.

Run multiple AI coding agents in parallel on isolated git worktrees with a full editor and built-in developer tools.

An open-source cost controller for AI agent loops that stops loops when converged and rolls back before degradation.

Open-source tool running specialized AI agents to review code, sync docs, perform deep QA testing, and distill repository knowledge on a schedule.

Open-source CLI, debug agents, and browser tools for building and maintaining reliable web integrations.

Local-first AI operator that controls your Windows PC, files, shell, apps, browser, and desktop, with voice and memory, all on your machine.

The fastest way for an AI agent to raise capital on-chain by issuing bonds, with no account, no middleman, and no platform fees.

Wolbarg is a local-first TypeScript SDK providing shared semantic memory for AI agents using SQLite or PostgreSQL.

An AI personal assistant that works across your desktop, files, apps, and workflow, keeping your data local and private.

Graft AI gives AI agents a reliable way to use legacy software by turning real interfaces into stable tools.

Autonomous AI testing agent that crawls your web app, maps behavior, and surfaces regressions without scripts or maintenance.

An open-source Python framework for building agentic AI applications with server-driven UI, native observability, sandboxing, and pluggable model orchestration.

An open-source QA agent that reads codebases, derives business flows, and runs end-to-end tests across frontend and backend.

Open-source context engineering layer for AI agents that reduces token usage by ~80% and improves accuracy by selectively providing relevant tools and skills.

Deploy autonomous AI employees from a single prompt to work 24/7 across any role.

Kit for AI provides persistent memory and document conversion for AI agents via MCP and REST, enabling agents to remember, search, and cite knowledge from any file or URL.

SonOf is an agentic engineering service that ships production code into your existing product—connect your repo, get a free audit, approve tickets, and pay only when code ships.

Nous centralizes the data scattered across your GTM tools into one context graph, resolving every person and company into a single record your agents read in one call.

IQVigilant is an AI-native dynamic engine for building enterprise-grade applications with deterministic AI agents, natural language querying, and no-code page building.

Infrastructure for AI agents to connect, communicate, and earn — with outbound-only, real-time streaming, and built-in billing.

Agentcard provides agent-friendly card issuing and payment infrastructure for AI agents, enabling 5-minute setup and autonomous purchases.

Manage AI agent teams like human teams with responsibilities, numbers, commitments, and approvals across your business tools.

Agently builds a company brain across your team's tools and spins up autonomous agents to handle workflows, from drafting emails to managing projects.

Oodle AI provides agent observability with fast trace search, S3-based storage, and out-of-the-box insights to detect silent failures in AI agents.

Disposable, network-restricted Linux VMs for AI coding agents — give each agent its own machine instead of yours.

Juggler is an open-source AI coding agent with a visual workbench that gives you inspectable tool calls, branching threads, and editable context for hands-on control over LLM actions on your codebase.

AgentKey is an AI-powered tool that generates and manages secure authentication keys and tokens for AI agents and APIs.

Osaurus is a private, local AI assistant for Mac that runs open models on-device, with optional cloud AI access and autonomous agents.

Loomal is the payments layer for agentic commerce, letting you add a paywall to any API or store so AI agents can pay automatically in USDC.

Proxon is the management layer for your AI workforce, providing visibility, governance, cost attribution, and workflow propagation across the organization.

Skillscript is a declarative language and runtime for authoring agent workflows that are safe, reusable, and inspectable.

Miora is an agentic creative studio with memory that handles your entire creative pipeline from brief to delivery.

A forensic tool that reconstructs AI coding agent sessions from local logs to detect sensitive file reads and data exfiltration attempts.

Open-source AI voice agent that integrates with Asterisk/FreePBX for natural conversational IVR with cloud or local AI providers.

Open-source workspace to build, deploy, and orchestrate AI agents and workflows with visual and code tools.

Yasmine is an AI coworker that lives in Slack and performs real work like answering emails, tracking finances, running operations, and shipping code, using your own Claude subscription.

Mispher turns speech into clean text anywhere on macOS, then goes further with dictation cleanup, rewrite-in-place, translation, and an on-device agent that plans, uses tools, and answers.

Scarlett is an AI coworker that lives in Slack, connecting to over 3,000 tools to automate tasks, generate reports, and execute real work for your team.

Timbal is the end-to-end AI platform for enterprise teams to build, deploy, and scale production agents, workflows, and interfaces.

Acti is the world's first agentic keyboard that transforms any text field into an action layer, letting users type their intent and long-press to execute actions across apps.

Coasty is a self-correcting computer-use agent that automates software workflows by reading the live screen and interacting like a human, achieving 85.60% on the OSWorld benchmark.

Aura is an open-source intelligence layer for AI coding agents that unifies multiple agents, provides AST-level diffs, and verifies changes against goals.

A unified AI gateway providing access to 300+ leading models through one EU-hosted, GDPR-compliant API with an OpenAI SDK-compatible interface.

Open-source framework for building AI agents with flexible capabilities, tool integration, and community-driven development.

A stealth browser designed for AI agents to browse the internet seamlessly, overcoming restrictions that treat agents as second-class.

Kastra is an authorization layer for AI systems that checks every action against policy before it runs.

FableCut is an open-source browser video editor with a JSON timeline that AI agents can drive via MCP and REST APIs.

Rewisp is an on-device ambient memory for Mac that captures text from your screen and lets you ask anything about your past activity, automatically surfacing promises, changes, and summaries while keeping everything private.

Backtest crypto trading strategies by describing them in plain English, directly from Claude, ChatGPT, or any AI agent.

Open-source platform for real-time AI agent security, auditing skills and runtime with community-driven threat rules.