Free Marketing Tools

10 free tools across email, LinkedIn, ad copy, and personality assessment. No signup. No credit card. Most return a result in under 30 seconds.

Every tool below uses the same multi-framework engine that powers COS — Engagement, Personality (OCEAN), Strategic Clarity, and Framing analysis. The free tier covers the diagnosis; the paid tier covers the iterative rewrite + tone calibration.

Content Optimization

Paste any draft. Get a 1-10 score across 4 frameworks, the dimension that's strongest, and the dimension that's broken — before you send or publish.

Free

Subject Line Tester

Score any email subject line across 5 OCEAN dimensions. Get the per-dimension fix to lift open rates before you send.

Best for: cold outreach, nurture, newsletter · 3 free tests/day
 Free

A/B Subject Line Comparator

Paste two subject lines side-by-side. See which dimension each one activates and which actually fits your audience — not just which "feels" better.

Best for: pre-send A/B decisions · 3 free comparisons/day
 Free

Cold Outbound Analyzer

Paste a full cold email or DM. Get a coverage check that flags subject-to-body mismatches and the dimensions your draft is missing.

Best for: cold email, LinkedIn DMs · 3 free analyses/day
 Free

LinkedIn Post Analyzer

Score a LinkedIn post draft before publishing. Check whether your hook, structure, and CTA match your target audience's profile.

Best for: founders, marketers, thought leadership · 3 free analyses/day
 Free

Ad Copy Analyzer

Paste a Google or Facebook ad. Get a 4-framework score against your target audience's personality — before you push spend.

Best for: paid media, performance marketing · 3 free scores/day

Personality & Profile Tools

Self-assessments and profile inference tools built on the OCEAN (Big Five) framework — the same model COS uses to match content to audience.

Free

LinkedIn Profile Analyzer (OCEAN)

Paste a LinkedIn profile bio. Get estimated Big Five personality dimensions and buyer persona insights to inform B2B outreach.

Best for: B2B sales research · 3 free analyses/day
 Free

OCEAN Big Five Assessment

20-question self-assessment. Discover your OCEAN profile and how your personality shapes the way you write, sell, and persuade.

Best for: founders, marketers, communicators · unlimited
 Free

DISC Personality Assessment

24-question DISC assessment. Discover your primary + secondary behavioral styles with an OCEAN translation for buyer matching.

Best for: sales teams, hiring, team dynamics · unlimited
 Free

Personality Type Test

28-question personality type test. Discover your 4-letter type across Jungian dimensions with an OCEAN Big Five translation.

Best for: type-curious readers, MBTI alternatives · unlimited
 Free

MBTI to OCEAN Translator

Already know your type? Translate any MBTI code to Big Five (OCEAN) traits instantly, with confidence ratings on each dimension.

Best for: existing MBTI users moving to OCEAN · unlimited

Want all 10 frameworks + unlimited analyses + iterative rewrites? COS is the paid platform behind these free tools — same engine, no per-day limits, plus persuasion + platform + quality frameworks the free tools don't expose. See pricing.

Start With Any Tool — No Signup Required

Most users start with the Subject Line Tester or LinkedIn Profile Analyzer. Both return a result in about 10 seconds.

Try Subject Line Tester → Try LinkedIn Profile Analyzer

Free to try • No signup • Your content stays private