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LinkedIn hook optimizer for founders: numbers beat opinions

By Charles Summers · Updated · Free, no signup

Short answer

Founder opinion takes ("here is what I learned building a company") are one of the most saturated formats on LinkedIn, so a hook has to compete against a wall of identical framing. This rewrites your draft 8 ways with a bias toward build-in-public numbers, a named before-state, and specific dollar or percentage figures over general lessons, because a verifiable number is the fastest way a stranger tells your post apart from the next founder-advice post. Every rewrite gets a character count and a truncation flag.

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Why founders need a different approach

Founders post more opinion content on LinkedIn than any other group, which means the opinion format itself has stopped working as a hook. "Here's what nobody tells you about building a startup" gets scrolled past because a reader has already seen twenty versions of that exact sentence this month. What still gets attention is a specific, named number attached to a specific decision: MRR before and after a pricing change, churn before and after a support hire, runway before and after a round. The number is doing the work an opinion cannot.

The second trap is hedging the claim to sound humble. Founders often soften a real result into vague language ('things are going well', 'we're seeing good traction') to avoid sounding like they are bragging, but vague language reads as no result at all. This tool rewrites your draft toward the specific figure, because a reader who cannot tell whether 'good traction' means 3 customers or 300 will assume the smaller number and move on.

It runs entirely in your browser. Nothing you type is sent to a server, no account is required, and there is no usage limit, because there is no cost per run to control.

What does the output look like?

This is the exact output the tool produces from the example inputs. It is generated by the same code that runs when you click the button, so what you see here is what you get.

ORIGINAL DRAFT (82 characters) "Here's what nobody tells you about building a startup: it's harder than you think." DIAGNOSIS 1. There is no concrete number in it. A specific figure signals a real result rather than a general claim, and it is the single cheapest upgrade to a weak hook. 8 REWRITTEN HOOKS (tone: data) 1. [Contrarian] Most advice about going from $8k to $41k MRR in one quarter by cutting our onboarding call entirely is wrong. Here is the version with the receipts. (148 characters OK for desktop) 2. [Specific-number] I spent 90 days on going from $8k to $41k MRR in one quarter by cutting our onboarding call entirely. One number mattered: 19%. (127 characters OK for desktop) 3. [Confession] I got going from $8k to $41k MRR in one quarter by cutting our onboarding call entirely wrong for a long time. Here is what I missed. (133 characters OK for desktop) 4. [Before/after] Before: a flat pipeline. After: replies within a day. Same team, different approach to going from $8k to $41k MRR in one quarter by cutting our onboarding call entirely. (169 characters OK for desktop) 5. [Question] What if everything you believe about going from $8k to $41k MRR in one quarter by cutting our onboarding call entirely is backwards? (132 characters OK for desktop) 6. [List-tease] 3 things about going from $8k to $41k MRR in one quarter by cutting our onboarding call entirely nobody tells you until it is too late. (135 characters OK for desktop) 7. [Pattern-interrupt] Stop. If you are still trying to fix going from $8k to $41k MRR in one quarter by cutting our onboarding call entirely by "do more outreach", read this first. (158 characters OK for desktop) 8. [Stakes] If you are guessing instead of measuring on going from $8k to $41k MRR in one quarter by cutting our onboarding call entirely, you are already behind someone who isn't. (168 characters OK for desktop) How to use this: post one, not all eight. Pick the pattern that matches something actually true about your post, not the one that sounds best in isolation.

Frequently asked questions

Why do build-in-public numbers outperform opinion posts for founders?

Because the opinion format is saturated and the number format is scarce. Almost every founder on LinkedIn has posted a version of "here is what building a company taught me". Far fewer post an exact MRR jump, churn figure, or hiring cost, because it requires actually sharing internal numbers. Scarcity, not virtue, is why the number outperforms the take.

Should I round my numbers to make them sound cleaner?

No. "We went from $8,412 to $41,190 MRR" reads as a real screenshot a reader could ask to see. "We roughly 5x'd revenue" reads like every other founder claim on the platform. The specificity itself is the credibility signal, so rounding it away removes the exact thing that made the number work.

Is a contrarian take still worth using as a founder?

Only when you can back it with your own data point in the same post, not as a standalone opinion. "Everyone says do X, we did the opposite and here is the number that resulted" works because it pairs the contrarian frame with evidence. A contrarian take with no attached result reads exactly like the opinion posts it is competing against.

Does posting a screenshot of the metric help or hurt the hook?

It helps engagement once someone opens the post, but the hook text still has to earn that open on its own, since the image does not show in the notification preview or always render before the text does. Write the hook as if the number has to carry the post alone, then treat the screenshot as confirmation, not the pitch itself.

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