Excession Labs vs MarStack

A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.

Excession Labs compared with MarStack
Detail	Excession Labs	MarStack
What it does	AI security agent and hosted model API for authorized testing	Analytics expert and auditor inside Claude that checks GA4, Google Tag Manager, consent, Meta and Google Ads with 167 expert rules and answers business questions across your marketing data.
Stage	Not given	Not given
Founded	Not given	Not given
Based in	Not given	Not given
Pricing model	Not given	Not given
Pricing	Starter $20/month with $30 credit; Pro $100/month with $175 credit; Max $200/month with $400 credit; Ultra $500/month with $1,250 credit. Pay as you go: add funds from $10 to $1,000, balance never expires. DeepSeek V4.1 Flash: $0.035 input, $0.005 cached input, $0.50 output per 1M tokens. DeepSeek V	Free: 100 credits (no card required). Starter: $19/month for 1,000 credits. Pro: $49/month for 5,000 credits. Agency: $149/month for 30,000 credits. Individual tool calls cost 1-10 credits depending on complexity.
Key features	Terminal AI agent with parallel workers Per-tool allow, deny and ask rules Evidence-linked findings with severity and remediation steps OpenAI and Anthropic SDK-compatible API endpoints Session save, resume, fork and export Headless mode with JSONL output and exit codes for CI Support for MCP servers, skills, AGENTS.md, slash commands and hooks DeepSeek V4.1 Flash and abliterated variant models Cross-platform support for macOS, Linux and Windows Shared account balance between terminal agent and API	GA4 property audits with 89 expert checks Real-browser page tracking inspection and validation Live conversion testing with form submission Business intelligence across GA4, Meta, Search Console and CRM Branded report generation in Excel, Word, PDF and PowerPoint Integration with Claude, Cursor and VS Code via MCP
What makes it different	Unified billing for both terminal agent and hosted API API compatible with OpenAI and Anthropic SDKs Evidence-based findings with source lines and reproduction steps Terminal agent with configurable tool rules and headless CI mode	Real-browser proof of tracking, not config checks alone
Community votes	0	0
DR (Domain Rating by Ahrefs)	15 −1 (down) since last check	Not checked yet no change since last check
Trust Flow (Majestic)	0	0
Citation Flow (Majestic)	0	8
Referring domains (Majestic)	0	4

4 details filled in for both companies.

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