# TCO Audit (https://tcoaudit.com)

> Independent B2B SaaS Total Cost of Ownership (TCO) calculators, live website SEO & AI-search (`llms.txt` / JSON-LD) readiness grading, and open-source cloud & workflow automation blueprints.

## Interactive Tools & Calculators

- [SaaS & Automation Tax TCO Calculator](https://tcoaudit.com/tco-calculator.html): Deterministic 12- and 36-month cost modeling comparing Zapier, HubSpot, and Mailchimp against n8n Cloud, Make.com, 1-Click Railway Worker Stacks, Brevo, and Systeme.io.
- [Live Website SEO, TTFB & AI-Search Readiness Grader](https://tcoaudit.com/seo-ai-grader.html): Inspects live origin TTFB, canonical tags, JSON-LD schema graphs, AI crawler rules (`GPTBot`, `ClaudeBot`, `PerplexityBot`) in `robots.txt`, and `/llms.txt` manifests.
- [B2B Outbound & Lead-Enrichment ROI Sizer](https://tcoaudit.com/outbound-stack-builder.html): Models secondary sending domains, inbox warmup caps, enrichment unit economics, and cost-per-booked-meeting across Apify, Apollo.io, and Instantly.ai.

## Key 2026 Infrastructure Findings

- **Workflow Billing Model Shift:** Task-metered platforms charge per action step inside loops; full-workflow execution engines (`n8n`) or self-hosted queue stacks (`Railway` + Postgres + Redis) cut 36-month TCO by 55%–82% above 25,000 monthly tasks.
- **CRM Contact Tier Compression:** Separating high-volume transactional/newsletter delivery (`Brevo` / `Listmonk`) or flat-tier funnels (`Systeme.io`) from per-seat sales pipelines avoids steep 10k–50k contact cliff jumps.
- **AI Search Visibility (`GEO`):** Combining sub-300ms origin TTFB (`Cloudways` NVMe / Edge Static Assets), valid `JSON-LD` entity graphs, unblocked AI crawler directives, and a clean `/llms.txt` index materially improves citation accuracy in LLM answer engines.

## Governance & Contact

- [Editorial Methodology, FTC Disclosure & Privacy](https://tcoaudit.com/legal/disclosure.html)
- Contact: partners@tcoaudit.com