Subject line tester
Test your cold email subject line for spam triggers, length, and curiosity.
How it works
Three steps. Ten seconds.
Paste your input
Drop what you have into the box above.
Gangly analyzes it
We score, rewrite, or generate based on your input.
Get your result
Use it directly or upgrade for the automated version.
Save your results
Get history + weekly signal drops.
Drop your email to save runs and get a weekly breakdown of what's working for top reps.
FAQ
Common questions
Is this tool really free?
Yes — use it unlimited, no login required for the first run.
How does it work?
We run your input through Gangly's signal and language models and return results instantly.
Do you store my input?
We only store it if you opt in. Otherwise it's processed and discarded.
Will this work for my industry?
It works for most B2B use cases. Enterprise and regulated verticals get best results with the full Gangly trial.
Is there a full version?
Yes — the paid Gangly product runs this and the full workflow (signal, outreach, call prep, notes) together.
More free tools
Keep building.
Free call prep generator
Enter a company. Get a one-page prep brief with signals and talking points.
Try it → Free toolCold email template generator
Enter your ICP and a signal. Get three cold email drafts you can send today.
Try it → Free toolFollow-up timing optimizer
Tell us what channel and stage. Get the optimal next-touch timing.
Try it → Free toolICP generator
Answer 5 questions. Get a filled-in ICP doc with firmographics, pain, and triggers.
Try it →Want the full workflow?
Gangly runs this — and call prep, live coaching, and CRM updates — in one tool. 14 days free.