Blade

Blade finds the people already in your Gmail and turns years of messages into a targeted list you can reach. It scans headers to identify real contacts, filters out no-replies and receipts, and ranks connections by how often you talk. You curate the list, write one announcement, personalize names, and send from your own Gmail with full previews and unsubscribe links. Blade lets you rescan anytime, so your next launch starts with familiar faces.