Ads Lighthouse vs Gauge in 2026: Brand-search evidence vs AI-search and ChatGPT ad context

Ads Lighthouse is designed to document who appeared on configured brand searches. A project records a brand, domains, keywords, locations, devices, and schedule, then checks Google and Bing paid text results. Growth and above add Google Shopping. Each saved result preserves the context behind the observation, including search term, engine, location, device, time, advertiser domain, ad copy, and destination. That makes it much more useful for a brand-protection or affiliate-compliance workflow than a general creative-discovery product.

The product also adds operational handling after discovery. Teams can compare domains by observed visibility, investigate advertiser and keyword histories, identify affiliate parameters and IDs in saved links, trace eligible redirect chains, create policy cases, and build evidence packs. Alerts can go to email, Slack incoming webhooks, or a webhook endpoint. An observation still proves only that an ad appeared in a configured search at a particular time. It is not Google impression share, proof of a bought keyword, spend data, or a legal finding.

Starter is $49 per month for one project, 20 keywords, two locations, 7,500 scheduled checks, and 100 on-demand checks. Growth is $99 and adds Shopping. API keys, REST API, white-label reports, and client branding begin on Scale at $299. Every plan includes team roles, exports, PDF reports, alerts, and an MCP server. This is unusually concrete pricing, but high-frequency multi-market monitoring can consume allowance quickly.

Gauge Chat is a broader AI-search growth platform rather than a brand-search evidence tool. It runs a workspace’s tracked prompts and records brand mentions, citations, competitors, and sponsored ChatGPT placements it observes. The ChatGPT Ads view can show advertiser, ad copy, appearance count, and the prompts where a placement appeared. This prompt-level context is useful when a team is deciding whether an AI buyer question needs a content change, a paid test, or both.

Connecting an OpenAI Ads account adds first-party campaign and ad-group budget, spend, impressions, clicks, CTR, and CPC to the workspace. Gauge also documents Meta and Google Ads account connections, while its wider product includes competitor analysis, an Action Center, content workflow, CMS connections, GA4, Search Console, Slack, and MCP. That breadth has value for a shared growth team, but it does not create independent evidence that another advertiser ran a particular Google brand term in a given location.

Gauge Chat Growth is listed at $599 per month, with 600 prompts run daily, 54,000 answers per month, 18 publish-ready articles, and three seats. Enterprise is custom. Gauge Agents is separate from Gauge Chat and starts at $100 per month, while Agency Mode is listed at $300 per active client per month. The pricing and billing documentation disagree on some Growth platform and seat limits, so a buyer should obtain the current commercial terms before treating every published allowance as final.