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Free AI with Custom Instructions

We've analyzed all major AI tools to find which ones offer custom instructions for free. Here are 50 top options you can start using right now without a credit card.

ChatGPT

OpenAI

Versatile conversational AI for everyday work

1.8B / mo estimated traffic
Free / $20/mo
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Claude

Anthropic

Advanced reasoning and nuanced long form analysis

140M / mo estimated traffic
Free / $20/mo
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Google Gemini

Google

Multimodal AI integrated into Google Workspace

420M / mo estimated traffic
Free / $19.99/mo
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Notion AI

Notion

Integrated knowledge management and document synthesis

185M / mo estimated traffic
Free / $10/mo
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Cursor

Anysphere

AI first code editor for rapid engineering

42M / mo estimated traffic
Free / $20/mo
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GitHub Copilot

GitHub

AI pair programmer integrated into popular IDEs

82M / mo estimated traffic
Free / $10/mo
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Windsurf

Codeium

Agentic IDE designed for deep codebase collaboration

12.4M / mo estimated traffic
Free / $20/mo
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Llama

Meta

Open-source large language model family

5M / mo estimated traffic
100% Free
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HuggingChat

Hugging Face

Free open-source chatbot powered by open models

1.8M / mo estimated traffic
100% Free
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Poe by Quora

Quora

Platform for exploring and comparing AI models

4.2M / mo estimated traffic
Free / $20/mo
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Character.AI

Character.AI

Chat with AI characters and personalities

2.8M / mo estimated traffic
Free / $10/mo
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Copy.ai

Copy.ai

Free AI copywriting tool for marketing

1.2M / mo estimated traffic
Free / $49/mo
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Rytr

Rytr

Affordable AI writing assistant for all content types

1.6M / mo estimated traffic
Free / $9/mo
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Lovable

Lovable

Full-stack web development with AI pair programmer

4.8M / mo estimated traffic
Free / $20/mo
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You.com

You.com

Privacy-focused search engine with AI

8.2M / mo estimated traffic
Free / $12/mo
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Google Antigravity

Google

Agentic IDE, CLI, SDK, and desktop command center

4.5M / mo estimated traffic
Free / $19.99/mo
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Kiro

Amazon

Spec-driven agentic IDE, CLI, web, and mobile

3.2M / mo estimated traffic
Free / $20/mo
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Stable Diffusion

Stability AI

Open image models, API, and Brand Studio from Stability AI

15M / mo estimated traffic
Free / $19/mo
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Ideogram

Ideogram

Image generation with reliable in-image text

9M / mo estimated traffic
100% Free
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CodeRabbit

CodeRabbit

Agentic AI code review for pull requests, IDE, and CLI

2.8M / mo estimated traffic
Free / $24/mo
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Aider

Aider

Open-source AI pair programming in the terminal

1.5M / mo estimated traffic
100% Free
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Warp

Warp

AI terminal, agent CLI, and cloud software factories

4.2M / mo estimated traffic
Free / $20/mo
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Tabnine

Tabnine

Private, air-gappable AI coding assistant and agents

2.1M / mo estimated traffic
Free / $39/mo
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Grammarly

Grammarly

AI writing assistant for grammar, tone, and rewrites

40M / mo estimated traffic
Free / $12/mo
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n8n

n8n

Source-available workflow automation with AI agents

5M / mo estimated traffic
Free / $22/mo
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Groq

Groq

Fast LPU inference API, playground, and Whisper STT

3.5M / mo estimated traffic
100% Free
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OpenRouter

OpenRouter

One OpenAI-compatible API for 500+ models

4.5M / mo estimated traffic
100% Free
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Whisper

OpenAI

Open-weight speech recognition from OpenAI

8M / mo estimated traffic
100% Free
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OpenClaw

OpenClaw

Open-source personal agent on your machine and chat apps

2.2M / mo estimated traffic
100% Free
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Zapier

Zapier

No-code automation, agents, and 9,000+ app connections

18M / mo estimated traffic
Free / $19.99/mo
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Photoroom

Photoroom

Product photo editor, background removal, and listing API

12M / mo estimated traffic
100% Free
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LangChain

LangChain

Open agent framework plus LangSmith for test, deploy, and govern

6M / mo estimated traffic
100% Free
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Replicate

Replicate

Run and fine-tune public models via API

5M / mo estimated traffic
100% Free
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Together AI

Together AI

Open-model inference, fine-tuning, and GPU cloud

2.8M / mo estimated traffic
100% Free
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Linear

Linear

Issue tracker with agents, MCP, and Linear Agent

4.5M / mo estimated traffic
Free / $10/mo
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ClickUp

ClickUp

Projects, docs, chat, and Brain agents in one workspace

20M / mo estimated traffic
100% Free
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Asana

Asana

Work graph, AI Teammates, and MCP for human-agent teams

25M / mo estimated traffic
100% Free
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Make

Make

Visual automation scenarios across thousands of apps

8M / mo estimated traffic
100% Free
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Figma

Figma

Collaborative design canvas with Figma AI, Make, and MCP

80M / mo estimated traffic
Free / $16/mo
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Wordtune

Wordtune

Rewrite, tone, grammar, and summaries with a Chrome extension

5M / mo estimated traffic
100% Free
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Amazon Bedrock

Amazon

AWS platform for foundation models, agents, and Guardrails

6M / mo estimated traffic
100% Free
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Azure OpenAI Service

Microsoft

OpenAI models on Azure with enterprise identity and networking

5M / mo estimated traffic
100% Free
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Vertex AI

Google

Google Cloud agent platform, Model Garden, and Gemini API

4M / mo estimated traffic
100% Free
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Pinecone

Pinecone

Serverless vector database, embeddings, and Assistant

2M / mo estimated traffic
100% Free
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D-ID

D-ID

Talking avatars, agentic video, and a streaming API

3.5M / mo estimated traffic
100% Free
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Deepgram

Deepgram

Speech-to-text, Flux TTS, and a Voice Agent API

1.5M / mo estimated traffic
100% Free
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AssemblyAI

AssemblyAI

Speech-to-text, Voice Agent API, and speech understanding

1.8M / mo estimated traffic
100% Free
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Stable Audio

Stability AI

Generate music and sound effects in the browser, DAW, or API

2.5M / mo estimated traffic
100% Free
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InVideo

InVideo

Agent Two: AI video agents, storyboard, and a timeline editor

15M / mo estimated traffic
100% Free
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Raycast AI

Raycast

OS launcher chat with 32+ models, extensions, and Ollama

3M / mo estimated traffic
100% Free
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