AI Agents AI Tools: Pricing Overview

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What these tools do and who needs them

An AI agent differs from a chatbot in that you do not ask it a question; you give it a job. It breaks the job into steps, such as looking things up, filling forms, sending mail or editing code, does them, and reports back. This category includes no-code platforms for building your own bots and workflows (Coze, Sim, Make, n8n, Taskade); a coding agent that fixes bugs on its own (Codex); a voice agent that answers phone calls (Vapi); and developer workbenches and sandboxes for running many agents (holaOS, SandBase CLI, CreateOS Sandbox). Small businesses automating repetitive work, community managers and anyone curious about letting AI run on its own will look here.

Three common free-tier traps

1. Five billing models make comparison hard. Of 14 tools, 6 are subscriptions, 3 credit-based, 3 usage-based, 1 per task and 1 free-only. Only 6 have a fixed monthly price you can compare directly; for the rest you must first estimate how many tasks you will run a month.

2. Credits refill in very different ways. Coze free gives 10 credits a day, and one call to an expensive model costs 2 to 3, so you get a handful of runs; Sim free gives 1,000 credits a month with no daily top-up; Taskade free is a one-time 6,000 credits that never refill. All are “credits”, but they last for very different lengths of time.

3. “Open source and free” means you host it and pay for the model yourself. n8n’s community edition, holaOS self-hosted and SandBase CLI are free software, but you need your own server and you pay the AI model provider separately; holaOS desktop says “free to start” without publishing an allowance. If you cannot run a server, that kind of free is out of reach. Also note 3 tools with no free plan: Pazi’s free plan has been withdrawn, Strix’s cloud moved to one-time billing, and Termi Protocol has none.

How to choose: three plain rules

Estimate monthly runs first. A daily workflow is 30 runs a month; one every 15 minutes is 2,880. Compare that with the free allowance and you know immediately whether free is possible.
If you cannot self-host, look only at cloud plans. Open-source free tiers are meaningless for you; compare cloud monthly prices (from US$8 here).
Check whether the free plan lets others use what you built. Some platforms let you test for free but charge to publish to customers or colleagues; each tool page’s free-tier field says which.

Category numbers (from the AMPM database, computed 2026-09-12)

Tools listed: 14, all active.
With a free tier: 11 (79%). The 3 without: Strix, Termi Protocol, Pazi.
With a fixed monthly plan: 6; cheapest monthly plan per tool ranges from US$8 to US$99 (lowest: Codex at US$8; highest: holaOS at US$99).
Billing model: subscription 6, credits 3, usage 3, per task 1, free-only 1 (Moltbook, entirely free with no paid plan).
Free allowance stated as one-time: Taskade. Official cloud with a 14-day trial and no free tier: n8n.