About BylineSig

Built by a solo founder. Pre-launch, growing in the open.

What this actually is

BylineSig turns one sentence — a "vibe" — into a real, animated email signature: a hosted GIF wrapped in email-safe HTML. Every example on this site is rendered by the same engine you'd get, not a mockup or a screenshot.

Why it exists

Most signature tools generate a static image or plain HTML block. We built the piece that's actually hard: motion that survives Gmail, Outlook, and Apple Mail without breaking, dark mode included, with nothing that hurts deliverability.

What's real, and what isn't yet

We don't fake testimonials, logos, or usage numbers — you won't find any on this site until they're real. What is real: the render engine, hosted on our own infrastructure; the security posture (email-safe HTML only, no scripts, no tracking pixels, restricted API keys, webhook signature verification); and every signature in the example gallery.

How we handle your data

We store what you type in to build your signature and the signature itself. We don't sell data or add tracking pixels to what we render for you. Full detail in the privacy policy.

Get in touch

Questions, bugs, feedback — all of it goes to a real inbox, read by the person who built this: [email protected]. Support issues to [email protected], billing to [email protected].