CrbonFree vs Thanor: Features, Pricing & Which Is Better (2026)
A side-by-side comparison of CrbonFree and Thanor — features, pricing, and ideal use cases — to help you decide which AI tool fits your workflow.
CrbonFree
Crbon Labs Inc.
CrbonFree meters the energy and carbon of every AI token across providers, with published factors, uncertainty bands and audit-ready retirement receipts.
Key features
- Per-Token Carbon Metering: Counts every token by model and provider and converts it to energy, CO2e and water using versioned, published factors.
- Multi-Provider Coverage: Connects OpenAI, Anthropic, OpenRouter, AWS Bedrock, Google Vertex AI, Azure Foundry, Vercel and Cloudflare AI Gateways into one report.
- Many Ingestion Surfaces: Read-only provider keys, TypeScript and Python SDKs, an OAuth-secured remote MCP server, a CLI for local coding agents and a Chrome/Edge extension for ChatGPT, Gemini and Claude.
- Layered Methodology with Uncertainty: Reports model energy, data-centre overhead and embodied hardware/training carbon separately, each with a ±28.3% uncertainty band.
- Metadata-Only Privacy: Receives only model, token counts and timestamps — prompt and completion content never leaves your systems.
- Signed Retirement Receipts: Paid plans issue receipts listing credit serial numbers on the American Carbon Registry or BCarbon Registry, publicly verifiable.
- Monthly Audit Packs: Zip exports with a manifest hash plus badges and certificates to back published climate claims.
- Dashboard & REST API: One view of tokens, cost and carbon across projects with CSV/JSON export and twelve read endpoints with an OpenAPI spec.
Best for
- Scope 3 Reporting: Sustainability teams produce defensible AI emissions figures for disclosures instead of spend-based guesses.
- Engineering Carbon Visibility: Track the footprint of coding agents like Claude Code across a dev team via the CLI.
- Model Selection by Footprint: Compare energy and carbon per provider and model tier when choosing models for production workloads.
- Carbon Offsetting with Proof: Retire credits against measured AI usage and share verifiable receipts with auditors or customers.
- Board and Auditor Requests: Hand auditors monthly audit packs with verifiable hashes when asked for AI emissions data.
- Personal Chat Usage Tracking: Individuals estimate the footprint of their ChatGPT, Gemini and Claude sessions with the browser extension.
Thanor
Thanor
Library of complete art-direction prompts that make AI-built websites look professionally designed, usable in Claude, Cursor, v0 and more.
Key features
- Art-direction prompts: Each entry specifies palette, type scale, motion curves and structure
- Works with any AI builder: Paste into Claude, ChatGPT, Cursor, v0, Lovable or Bolt
- Weekly updates: New directions are added on a regular schedule
- MCP server: Pull directions from within Claude, ChatGPT or Cursor
- Section prompts: Headers, footers, heroes and pricing sections
- Animated backgrounds: Prompt-ready animated background styles
- Category browsing: Filter by hero, landing page, SaaS, agency, portfolio and e-commerce
Best for
- A founder prompts Claude with a SaaS direction to generate a polished landing page
- A freelancer uses agency and portfolio directions for client sites
- A developer in Cursor pulls a design direction through the MCP server mid-build
- A designer reviews palette and motion choices to learn how strong art directions are written
- A vibe-coder swaps hero prompts to quickly compare visual styles