Cai
Free, open-source macOS app that turns any selection into an AI action with ⌥C
For macOS power users who live in the keyboard and want local AI that respects privacy, Cai is a standout—free, open-source, and genuinely fast. It beats switching to a chatbot for quick, inline actions. But it's macOS-only and rewards users who invest in setup. Skip it if you're not on a Mac or want a full conversational chatbot.
Verified 15d ago · liveness 69/100 · cite: rightaichoice.com/tools/cai
- macOS power users who want a local, keyboard-driven AI assistant
- Developers needing quick GitHub issues or Linear tickets from code errors and screenshots
- Privacy-conscious users who want on-device AI without cloud dependence
- Productivity enthusiasts who automate text processing with action chains
- Users on Windows or Linux (macOS only)
- Those seeking a full conversational AI chatbot with memory
- Users uncomfortable with basic terminal setup for advanced models
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Skip Cai if you're not on macOS, want a conversational chatbot with memory, or prefer a tool with zero setup and no need for terminal commands beyond basic installation.
If you choose a cloud model (like OpenAI or OpenRouter), you'll need to supply your own API key—there's no free tier for cloud models; you pay per use.
Cai is completely free with no subscription, no account, and no per-run tokens for local models. It's cheaper than Raycast AI ($8/mo) or Maccy Pro, and you control your data. The only cost is time setting up advanced models or cloud APIs if you need them.
In short
Cai — Free, open-source macOS app that turns any selection into an AI action with ⌥C. Best for macOS power users who want a local, keyboard-driven AI assistant, Developers needing quick GitHub issues or Linear tickets from code errors and screenshots, Privacy-conscious users who want on-device AI without cloud dependence. Free to use.
What's new in Cai
Checked 15 days agoAcross the latest 2 updates: 2 feature updates.
Cai v1.6.0 released
Introduced the latest version with improved agent-authored actions, refined diff approval flow, and performance optimizations for the built-in local model.
Apple Intelligence support added on macOS 26+
Cai now supports using Apple Intelligence as a local model provider on macOS 26+, giving users another on-device option beyond the built-in Ministral 3B.
What people actually say about Cai — is it worth it?
We ran a structured research pass across product reviews, community discussions, and post-purchase forum threads to surface the patterns vendors won't publish themselves. Below: the recurring strengths, the hidden costs people mention most, and the cohort that consistently regrets adopting this tool.
60 mentions across 4 sources (Hacker News, Product Hunt, GitHub, Lemmy) · researched Jul 3, 2026.
Average across the 4 sources that answered — each source counts once, not each post.
- +Local AI runs out of the box with Ministral 3B, no account needed.
- +⌥C shortcut is a clever, low-friction trigger next to ⌘C.
- +MIT licensed, free, and zero telemetry — full transparency.
- +Action chaining lets you pipe selection through AI, scripts, and apps.
- +Inline replacement eliminates app switching for common tasks.
- −Mac-only — no Windows or Linux support at all.
- −Very thin community feedback; reliability and support are unproven.
- −Custom action creation requires scripting skill (shell, AppleScript).
- −No visible sync or backup for custom actions across machines.
- −Built-in model performance not benchmarked against cloud alternatives.
- • No hidden costs; the tool is fully free and open-source.
Viability Score
How well maintained and how widely used is Cai? Built from what the vendor actually publishes (docs, changelog, tutorials, integrations, pricing), whether the site is live, and how much real users discuss it. How we calculate this
Last calculated: September 2026
How we score →Key Features
- Press ⌥C on any text or image to invoke actions
- Built-in local AI (Ministral 3B via MLX) runs offline
- Action chains: multi-step workflows with AI, scripts, destinations
- MCP server support for coding agents (Claude Code, Cursor, Codex)
- Agent proposals arrive as reviewable diffs—approve before running
- Image to Text (OCR) from screenshots or images
- Create GitHub issues and Linear tickets from selection
- Support for HuggingFace MLX models, Ollama, LM Studio, OpenRouter, Anthropic, Apple Intelligence
- Clipboard history with search, pin, reuse (last 100 items)
- Per-app context awareness for smarter action suggestions
- Custom destinations: webhooks, AppleScript, deeplinks, Apple Shortcuts
- Shell actions for any CLI tool (gh, kubectl, jq, ffmpeg)
- Secrets stored in macOS Keychain, hidden from model/agent
- Keyboard-first navigation with favorites pinned to ⌘1–9
- Community extensions marketplace
About Cai
Cai is a free, open-source macOS app that acts as a local-first AI action layer. You press ⌥C on any selected text or image and instantly run custom actions: AI prompts, terminal scripts, URL shortcuts, OCR, summaries, translations, or create GitHub issues and Linear tickets—all without leaving your current app. Unlike clipboard managers that just store your copy, Cai acts on it. Unlike AI chat apps that force you to switch windows, Cai works inline, surfacing the right action based on what you selected. The core magic is its local-first design. Cai ships with a built-in local AI model (Ministral 3B via MLX) that gives you zero-setup AI that runs on your Mac with no account, no telemetry, and no per-run tokens. You can also bring your own brain: any HuggingFace MLX model, Apple Intelligence on macOS 26+, LM Studio, Ollama, or cloud APIs like OpenRouter and Anthropic. Everything stays on your machine by default; cloud is your choice. Offline? Yes—local models work without internet. Beyond one-off actions, Cai supports action chains: pipe a selection through AI, scripts, and destinations (Slack, webhooks, AppleScript) in one keystroke. For developers, Cai is also an MCP server, so coding agents like Claude Code, Cursor, and Codex can author actions over MCP. Every agent proposal arrives as a reviewable diff—you approve before it runs. Secrets are stored in the macOS Keychain, visible only as placeholders to the model or agent. Cai integrates with GitHub, Linear, Slack, Notion, Jira, Mail, Apple Shortcuts, and more via connectors, webhooks, and community extensions. It's MIT licensed, keyboard-first, and requires macOS 14+ (Apple Silicon for the built-in local model). Compared to alternatives like Raycast or Maccy, Cai is the only one that combines an AI action layer with an MCP-based agent workflow, all local by default. For macOS users who live in the keyboard and value privacy, Cai is a compelling free tool that's worth the setup.
Behind the Verdict
Cai nails a niche that's underserved: a local-first, keyboard-driven action layer that turns any selection into an AI-powered workflow. Its biggest strength is the ⌥C shortcut that works in any text field or app, eliminating the app-switching tax of traditional AI chat tools. The built-in local model (Ministral 3B via MLX) means you get instant AI with zero setup, no account, and no per-token costs—a huge privacy win. The action chain feature lets you build multi-step pipelines (e.g., selection → fetch URL → summarize → send to Slack) in one keystroke, saving you from repetitive manual steps. For developers, the MCP server support is a game-changer: coding agents like Claude Code, Cursor, and Codex can author actions that you approve as diffs, then run locally with no agent in the loop. This is a unique differentiator versus clipboard managers or simple AI launchers. Weaknesses: it's macOS-only, so Windows/Linux users are out. The built-in model is small, so complex tasks may need a cloud or external model. Setup for advanced models requires some terminal comfort. There's no team management or centralized admin, so it's not for organizations with governance needs. Where it fits: solo developers, privacy-conscious power users, and productivity enthusiasts on macOS who want to automate text processing and code workflows. Where it doesn't: enterprise teams needing multi-user control, non-technical users who won't touch a terminal, and anyone needing a conversational chatbot with memory.
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Real-world workflow fit
Concrete scenarios for the personas Cai actually fits — and what changes day-one when you adopt it.
Copies a stack trace from terminal, presses ⌥C, selects 'Create Linear Ticket', and the action extracts error + repro, creates the ticket, and posts a Slack ping—all in one keystroke.
Outcome: Saves minutes per bug report; ticketing becomes frictionless and consistent.
Selects a paragraph in an email, presses ⌥C, chooses 'Summarize' with the built-in local model, and gets a summary pasted back into the email draft.
Outcome: Gets AI assistance with zero cloud exposure; data never leaves the machine.
Takes a screenshot of a meeting invite, presses ⌥C, runs 'OCR to Calendar Event', and the text is extracted and a calendar event created without retyping.
Outcome: Eliminates manual data entry; meeting details never get lost.
Use Cases
- Press ⌥C on a Slack error message to create a GitHub issue with AI-summarized context
- Select a paragraph and run 'Translate to German' with automatic text replacement
- OCR a screenshot of a meeting invite and pipe the text to create a calendar event
- Trigger a shell script that renames files based on selected text, then send confirmation to Slack
- Highlight code and run 'Explain this code' using a local model without leaving your editor
- Chain 'selection → fetch URL → summarize → send to Slack' in one keystroke
Models Under the Hood
as of 2026-09-08
Limitations
- Cai is a macOS-only app.
- The built-in local model is small (Ministral 3B) and may be less capable than larger cloud models.
- Performance depends on your Mac hardware.
- No telemetry and no forced cloud, but optional cloud APIs are supported.
as of 2026-08-31
Verification history
We have re-verified Cai 6 times since . Each pass re-reads the vendor's own pages and re-checks every listed field against that evidence; passes where nothing had changed are marked as such.
- — re-checked, vendor evidence unchanged
- — re-verified summary, description, our verdict, our analysis, pricing model, pricing tiers, features, integrations, who it suits, who should skip it
- — re-checked, vendor evidence unchanged
- — re-verified summary, description, our verdict, our analysis, pricing model, pricing tiers, features, integrations, who it suits, who should skip it
- — re-verified summary, description, our verdict, our analysis, pricing model, pricing tiers, features, integrations, who it suits, who should skip it
- — re-verified summary, description, our verdict, our analysis, pricing model, pricing tiers, features, integrations, who it suits, who should skip it
Free to cite with attribution — this page re-verifies continuously.
12-month cost
Project the real annual outlay, including the implied monthly cost when only an annual tier is published.
Vendor list price only. Add-on usage, seat overages, and contract minimums are surfaced under Hidden costs & gotchas.
Plans compared
For each published Cai tier: who it actually fits, and what it adds vs. the previous tier. Cross-reference the cost calculator above for projected annual outlay.
Free & Open Source
$0/mo
Ideal for
Solo macOS power users and developers who want a local, privacy-first AI action layer with no cost and full control.
What this tier adds
Starting tier: $0/mo, includes all features—built-in local AI, unlimited actions, all connectors, MCP server support.
Where the pricing makes sense
The company stage and team size where Cai's pricing actually pencils out — and where peers do it cheaper.
Cai is completely free with no subscription, no account, and no per-run tokens for local models. It's cheaper than Raycast AI ($8/mo) or Maccy Pro, and you control your data. The only cost is time setting up advanced models or cloud APIs if you need them.
Setup time & first value
How long it actually takes to get something useful out of Cai — broken out by persona, not the marketing-page minute.
Immediate value: press ⌥C and use the built-in local model—no setup. Power users: ~15 minutes to connect your own model (Ollama/LM Studio) or cloud API; ~30 minutes to set up action chains and connectors.
Switching to or from Cai
How to bring data in from common predecessors and how to get it back out — written for the switcher, not the buyer.
- →From Maccy or Raycast: use Cai's clipboard history to replace Maccy's copy management; Cai's actions go beyond storing to acting on selections.
- →From Alfred: recreate workflows as Cai actions; Cai's AI and MCP support add capabilities Alfred lacks.
- ↗To Raycast: export your custom actions as scripts or recreate them as Raycast commands; Cai's MCP-based actions may need manual porting.
- ↗To a full chatbot like ChatGPT: you lose inline action but gain conversation memory; copy-paste results when needed.
Integrations
Resources & Guides
Tutorials & Learning
YouTube returned 6 videos for “Cai”, and we withheld 6: 6 could not be judged, because “Cai” is a single word that other videos use for other things. We are showing none, because we could not prove any of them are about Cai.
Official links
Tools that pair well with Cai
Common stack mates teams adopt alongside Cai, with the specific reason each pairing earns its keep.
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Featured Head-to-Head Comparisons
Cai vs Truleo
Choose Cai if you're a macOS power user wanting a free, private, keyboard-driven AI assistant that automates text actions locally — ideal for devs and productivity enthusiasts. Choose Truleo only if you're a law enforcement agency needing to surface leads across siloed data like jail calls, RMS, and BWC — its niche capabilities are unmatched but irrelevant outside LE.
Cai vs Locus Robotics
Cai and Locus Robotics serve completely different purposes: Cai is a free, open-source macOS tool for local AI actions on text/images, ideal for individual power users; Locus Robotics is an enterprise AMR solution for warehouses, requiring a RaaS subscription. Choose Cai if you're a macOS user wanting privacy-focused automation on selections; choose Locus if you operate a high-volume fulfillment center needing 2-3x productivity gains.
Cai vs Presto Voice
Cai and Presto Voice serve entirely different needs. Cai is a free, local, keyboard-driven AI assistant for macOS power users who want privacy and automation in text/image tasks. Presto Voice is a contact-priced enterprise voice AI platform for QSR chains to automate drive-thru ordering and boost revenue via upselling. Choose Cai for personal productivity, Presto Voice for restaurant operations.
Alternatives to Cai
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MaxAI.me
MaxAI.me is a Chrome and Edge extension that puts a multi-model AI sidebar inside any webpage for summaries, translation, replies, and image generation.
Cherry Studio
Open-source desktop client unifying 300+ AI models in one interface
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