Oh Boiler is a writing tool for working writers — recruiters, founders, managers, freelancers, indie newsletters — who rewrite the same eight letters forty times a year and want their Tuesday afternoons back. The principle: AI writes the body. You write the soul. Save the structure of a cover letter, cold email, proposal, report, performance review, or onboarding sequence once, with named variables: {first_name}, {specific_detail}, {soul_paragraph}. Each new send is the parts that change. The boilerplate is invisible. The personal part — the variables — stays one hundred percent yours. Per-recipient memory remembers what you wrote last time to whom: last contact date, current role, last topic, inside joke, tone. Pre-fills the next draft. Eight AI models available: Claude Opus and Sonnet 4.7, GPT-5 and mini, Gemini 2.5 Pro, Llama 4 405B, Mistral Large 3, Cohere Command R+. Pick per template, per variable. Browser ext for Gmail and Outlook (Chrome and Firefox), Apple Mail beta, Notion text shortcut, Slack /template command on Team. The one feature we won’t ship: auto-send. The final click stays with you. Free starter; Pro $12/month; Team $39/month per user. Built by a four-person studio in Lisbon, Marvila district.