Loops

Loops is the right pick for PLG startups who want lifecycle email to feel like a product feature, not a marketing afterthought. It's built by and for developers, and that shows — the API is clean, the event model is coherent, the UI doesn't apologize for itself. For a 10–50 person startup shipping onboarding emails, activation nudges, and retention flows, Loops clears Customer.io's complexity and Mailchimp's staleness in roughly half the setup time.

The tradeoff is maturity. Loops is young, and it shows at the edges — reporting is basic compared to Customer.io or Iterable, compliance tooling is thinner, and the integrations ecosystem is still filling in. For a PLG team that handles their own compliance and has in-house engineering to stitch data pipelines, these tradeoffs are acceptable. For a traditional B2B marketing team without eng resources, Loops will feel under-featured — Customer.io or Iterable is the better fit.

Pricing is transparent and contact-count-based, starting around $49/mo and scaling to $499+. There's essentially no negotiation on this product; it's self-serve by design. The lever instead is contact hygiene — teams that clean their unsubscribed/inactive contacts aggressively stay on lower tiers much longer. Revisit if your email volume exceeds 1M sends/mo (you'll start hitting deliverability and reporting gaps) or if you're acquired into a company that already runs a big Iterable/Braze footprint (consolidation wins).