There's a difference between restating your metrics and diagnosing your performance. One saves you a click. The other saves your account.
GoMarble and Sentrum both use AI to help media buyers understand ad performance — but they approach the problem from opposite directions. GoMarble is a conversational interface: connect your ad accounts, ask questions, and get text-based answers. It's fast for pulling metrics and running templated reports like weekly recaps or creative audits. But there's a ceiling. GoMarble restates what happened in your account. Sentrum explains why it happened. When your CPA spikes 30%, GoMarble can tell you it spiked. Sentrum traces the root cause through a diagnostic chain — was it CPM pressure from audience saturation? CTR decline from creative fatigue? A CVR drop from landing page issues? A placement mix shift inflating costs? That's the difference between reporting and diagnosis. GoMarble's own content acknowledges a fundamental limitation of MCP-based AI tools: they 'give access without understanding.' Sentrum was built specifically to close that gap — not just accessing your data, but understanding the causal relationships between metrics that explain performance changes.
Chat-first AI marketing analyst that connects to Google Ads, Meta Ads, and GA4. Ask questions about your ad data and get text-based reports using templates (weekly recap, creative analysis, audit, root cause). Credit-based pricing with a free tier limited to 1 account and $250K ad spend. Slack integration available.
Advertisers who want quick conversational answers about ad metrics across Google and Meta, and prefer chat-based reporting over dashboards
GoMarble tells you your CPA went up. Sentrum tells you it went up because creative fatigue drove CTR down 12%, which shifted spend to Reels placements with 2x higher CPMs, compounding the cost increase. Every insight is traced to a root cause with supporting evidence — not just a summary of what your dashboard already shows.
GoMarble sees creative names and performance metrics. Sentrum uses Gemini vision to analyze what your creatives actually look like — hook type, visual style, messaging angle, color palette, strengths and weaknesses. When we say a creative is fatiguing, we can tell you what about it stopped working and what creative direction to try next.
GoMarble outputs text-based reports. Sentrum gives you interactive diagnostic dashboards with real-time Recharts visualizations — CPM trend overlays, CTR decay curves, spend pacing charts, creative performance timelines. You can explore the data, not just read a summary of it.
Sentrum doesn't just flag isolated metrics. It traces diagnostic chains: creative fatigue → placement drift → audience saturation → spend pacing. The Creative Diversity Scorer (Shannon entropy) and Creative Velocity Tracker show how your creative mix is evolving. Per-creative fatigue detection scores CTR and CPR trends over time. These systems work together to surface the real story.
GoMarble's reports describe what happened. Sentrum's playbook engine generates specific action recommendations driven by diagnosed root causes — with the Campaign Structure Auditor catching audience overlap, the CPMr Dashboard alerting on cost efficiency shifts, and creative flighting narratives showing the impact of launching or pausing specific ads.
You want a quick chat interface to ask questions about ad metrics across Google and Meta. You prefer text-based answers over dashboards. You need a free tier to get started. You manage multiple platforms and want one conversational tool. You don't need to explain the causal 'why' behind performance changes to clients.
You need to understand WHY your Meta Ads performance changed — not just what changed. You want AI that actually sees your creatives and diagnoses fatigue, not just reads metric tables. You need interactive dashboards to explore data visually. You present to clients or stakeholders who expect root-cause analysis. You want action recommendations tied to diagnosed problems, not generic best practices.