Guides
Deeper dives on the numbers behind our tools — pricing, SaaS metrics, startup finance, accessibility, and more.
Why Google Rewrites Your Meta Description Anyway (And What Still Matters)
Google ignores your carefully-written meta description more often than you'd think. Here's what it actually uses instead, and what's still worth optimizing.
WCAG Contrast Ratios Explained: Why 4.5:1 Isn't an Arbitrary Number
The formula behind WCAG contrast requirements is genuinely interesting once you see it — and it explains why some "readable-looking" color pairs still fail.
The 2026 IRS Mileage Rate Changed Mid-Year — Here's What That Means
The standard mileage rate jumped from 72.5¢ to 76¢ per mile on July 1. If your mileage log spans both halves of the year, one flat rate will get your deduction wrong.
SAFE Notes Explained: What a Valuation Cap and Discount Actually Do
A SAFE isn't equity yet, and it isn't a loan. Here's what actually happens to your cap table when one converts — and why the math surprises most first-time founders.
Debt Snowball vs. Avalanche: Which One Actually Saves You More?
One method is mathematically optimal. The other is more likely to actually work. Here's how to decide which problem you're really solving.
NRR vs. GRR: What SaaS Investors Actually Look At
Two retention metrics, one very different story. Here's why a board deck can show 95% retention and 105% retention on the same numbers — and which one to lead with.
How to Price a Product for a Target Profit Margin
The markup formula most people use quietly ignores payment fees and ad spend — here's the version that doesn't, and why the difference matters more than it looks.