AI Compare Ninja

AI Compare Ninja is a free software-research and budgeting resource, available without signup in eight languages. For marketers, founders and developers choosing AI software, it provides editable prompt templates, reusable SKILL.md work instructions, agent/loop setup guides and browser-based utilities alongside editorial profiles with provider-sourced prices, plans, limits and alternatives.

The subscription calculator compares list prices and vendor-stated features. The API calculator estimates spending from request volume, input/output tokens and published OpenRouter route prices. These are estimates, not invoices, inference or API access. The prompt checker is rule-based; the browser-only image check reads Content Credentials and metadata, which do not prove that an image is true or AI-free. No models or agent execution are hosted.

Current features and dedicated public pages:
Software search: https://www.aicompare.ninja/en/
All tool profiles: https://www.aicompare.ninja/en/tools
Categories: https://www.aicompare.ninja/en/ai-software
Side-by-side comparisons: https://www.aicompare.ninja/en/comparisons
Fill-in prompt templates: https://www.aicompare.ninja/en/prompts
Rule-based prompt checker: https://www.aicompare.ninja/en/prompts/improve
Prompt writing guide: https://www.aicompare.ninja/en/prompts/writing-good-prompts
SKILL.md work instructions: https://www.aicompare.ninja/en/skills
Agent instructions and guides: https://www.aicompare.ninja/en/agents
First-agent setup guide: https://www.aicompare.ninja/en/agents/build-your-first-agent
Agent-builder comparison: https://www.aicompare.ninja/en/agents/agent-builders-compared
Custom GPT alternatives: https://www.aicompare.ninja/en/agents/custom-gpt-alternatives
Subscription list-price calculator: https://www.aicompare.ninja/en/subscription-calculator
Token-based API cost calculator: https://www.aicompare.ninja/en/api-calculator
AI glossary: https://www.aicompare.ninja/en/glossary
Statistics, pricing analysis and vendor world map: https://www.aicompare.ninja/en/ai-pricing-index
Browser-only image provenance and metadata check: https://www.aicompare.ninja/en/check-image-origin
Loop templates: https://www.aicompare.ninja/en/loops
Vibe-coding tools hub: https://www.aicompare.ninja/en/compare/vibe-coding-tools
Voice-agent tools hub: https://www.aicompare.ninja/en/compare/voice-agents
MCP-server tools hub: https://www.aicompare.ninja/en/compare/mcp-servers
AI-visibility tools hub: https://www.aicompare.ninja/en/compare/ai-visibility

Configurable embeds are available for the calculators, prompt checker, image-origin check, prompt/skill cards and statistical charts. A monthly newsletter and tool-specific price alerts are optional and require email confirmation. Labelled advertising and affiliate links support the platform; catalogue positions are not sold. Website code is proprietary and reusable resources retain their published terms.

These are operator-supplied facts by Martin Müller, prepared with Codex assistance for independent editorial review, not a user review. Only the free Standard listing is requested, without paid promotion or a homepage/footer badge. Please reuse an existing record if present.