Loops

Loops, from Y Combinator-backed Astrodon Corporation, is email marketing software built specifically for SaaS teams — combining marketing, lifecycle, and transactional email in one interface, used by Framer, Linear, Perplexity, Clerk, and Reuters. Its lifecycle workflows handle onboarding, activation, and win-back campaigns with triggers and branching logic, a design system keeps emails on-brand across campaigns, and native integrations with Stripe, Clerk, Supabase, Zapier, and PostHog connect directly to a SaaS product's actual data rather than requiring manual list imports. AI agent integration (Claude, ChatGPT) supports drafting emails and setting up workflows conversationally, and deliverability monitoring tracks spam and bounce rates before they become a real problem. It's free to start with no credit card required; specific paid-tier pricing isn't detailed on the homepage. Good fit for a SaaS company that wants one email platform handling both marketing campaigns and transactional/lifecycle emails tied directly to product events, rather than running separate tools for each.