Both tools belong to the same emerging category — Generative Engine Optimization (GEO) — but they ship very different products. Below is a feature-by-feature comparison as of September 2026. (Not to be confused: Ahrefs AI Search is part of the Ahrefs SEO suite at ahrefs.com; the similarly-named Airefs at getairefs.com is an unrelated budget tracker at $29–59/mo — it appears once in the pricing table below for disambiguation.)
AI assistant coverage
An AI visibility tool is only as good as the LLMs it actually probes. If a tool only checks ChatGPT, you have no signal for buyers who ask Gemini or Perplexity — different models, different citation graphs, different recommendations. Arenza's scan set is ChatGPT, Gemini, and Perplexity; we don't claim engines we don't probe. Ahrefs AI Search is ChatGPT-focused per its public materials.
| AI platform | Arenza | Ahrefs AI Search |
|---|---|---|
| ChatGPT (OpenAI) | ✓ — weekly on Free, daily from Starter | ✓ |
| Gemini (Google) | ✓ — from Starter (weekly), daily on Pro | ✗ |
| Perplexity | ✓ — from Starter (weekly), daily on Pro | ✗ |
The Accuracy pillar — Arenza-only
Visibility tells you whether AI mentions you. Accuracy tells you whether what AI says is correct. Arenza's accuracy pillar tracks per-claim verdicts (false / outdated / partial), severity, and the verbatim AI quote — and ships fix prescriptions anchored to a specific claim. Ahrefs AI Search measures only mentions and share-of-voice; if ChatGPT confidently states the wrong battery capacity for your power bank, Ahrefs won't flag it.
Agency features (Ahrefs gap)
| Feature | Arenza | Ahrefs AI Search |
|---|---|---|
| Multi-brand portfolio view | ✓ | ✗ (single site picker) |
| White-label reports | ✓ (agency partnership) | Not published |
| CSV bulk-import brands | ✓ (agency partnership) | Not published |
| Copy prompts/competitors A→B | ✓ | Not published |
| Cross-brand AVS chart | ✓ | Not published |
| Per-brand Slack/Lark webhook | ✓ | Not published |
| Scheduled email digest to client VP | ✓ | Not published |
| MCP server | ✓ (mcp.arenza.ai — from Starter) | Not published |
| Public REST API | ✓ (from Starter) | Not published |
| Fixes executed for you (llms.txt + schema + content) | ✓ (Pro — Arenza Agents) | Not published |
Where Ahrefs wins
- Ahrefs has a long-established backlink and traditional SERP dataset — bundled with AI Search in the higher-tier plans, not a separate purchase.
- Brand recognition: a CMO already knows Ahrefs.
- Ahrefs has more granular keyword research tooling.
Pricing comparison
| Tool | Price (USD/mo) | AI platforms | Brands per workspace | White-label included |
|---|---|---|---|---|
| Arenza Free | $0 (forever) | ChatGPT (weekly scan) | 1 | No |
| Arenza Starter | $49 (cancel anytime) | 3 (ChatGPT daily; Gemini & Perplexity weekly) · unlimited tracked competitors | 1 | No |
| Arenza Pro | $299 (cancel anytime) | 3 (ChatGPT, Gemini, Perplexity — daily, multi-market) · 10 tracked competitors | 3 | Yes |
| Arenza Performance | Outcome-based (no public formula) | Managed by Arenza | Multi-brand | Per engagement |
| Ahrefs AI Search | ~$228 actual entry (rides on paid Ahrefs plans) | ChatGPT-focused | 1 site / workspace | No |
| Airefs (getairefs.com — a different product) | $29–59 | See vendor site | 1 | Not published |
For pure measurement, Arenza Free at $0 covers the job Ahrefs charges ~$228/mo (via a paid Ahrefs plan) to do for one site — and adds the Accuracy pillar (wrong-claim tracking with the verbatim quote). Arenza Starter at $49/mo is the like-for-like tracker comparison — unlimited tracked competitors, head-to-head comparison, Gemini and Perplexity, 5 articles a month — at roughly a fifth of Ahrefs' AI entry. Arenza Pro at $299/mo is a different purchase from any tracker: daily monitoring plus Arenza Agents that execute the fixes — llms.txt, schema, metadata, 100 articles a month hosted on your own domain — rather than reporting them. For 10 client brands, Ahrefs means 10 separate site workspaces with white-label not published; an Arenza agency partnership is one workspace, white-labeled, sales-led.
Recommendation
- You are a single-brand team that already owns Ahrefs → keep Ahrefs and turn on AI Search; the add-on cost is incremental on your existing bill.
- You are a solo operator or in-house marketer with one brand → Arenza Free at $0 shows you where you stand this week; Starter ($49/mo) when you want competitors compared and the first articles out; Pro ($299/mo) only when you want the fixes run, not just reported.
- You are an SEO/GEO agency with 5+ client brands → the Arenza agency partnership (white-label, bulk import, one workspace) is built for your workflow.
- You care about accuracy (wrong-claim tracking, fix prescription) → Arenza ships this; Ahrefs does not.