Lifecycle Email
Send the right email at the right point in a user's journey — onboarding, nudges, upgrade prompts, win-backs — based on what they did in your product.
The real choice
Email-only or multichannel. Email-focused tools keep sequences simple and cheap to start; messaging automation platforms add push, SMS and in-app messages driven by the same behavior data, with more setup and a higher bill.
The contenders
Grouped by the side of the choice they answer, not ranked. Open a row for when to use it, the trade-off and what makers say.
Loopsservice · free tierEvent-triggered onboarding sequences and transactional email from one tool, with a free tier to start.
219+4 open source$49Paid 5k301.4k/wk+120% vs npm
Trade-offEmail only; fewer segmentation and multichannel features than larger platforms.
llms.txtMCPUsed by AI Code Reviews by MatterAI, Anarlog, Arcane, Baselight, BestInterest for Coparents and 214 more · in 4 open-source projects.
Loops.so’s advanced segmentation, automated workflows, and clear analytics deliver highly effective, personalized email campaigns—without the bloat or complexity of other solutions.
UserlistserviceB2B SaaS where messages depend on both the user and the company account they belong to.8$149Basic
Use it whenYou sell to teams and need to message account owners differently from members.
Trade-offNo permanent free plan; priced by subscriber count.
Used by pgMustard, Apotheo, Fileinbox, Suggestion Ox, AgentMethods and 3 more.
For the past 18 months, this has been with the wonderful folks at Userlist .
Customer.ioserviceComplex behavior-driven journeys across email, push, SMS and in-app messages.
48+5 open source$100Essentials
Use it whenYour app is mobile or needs more than email to reach users.
Trade-offPriced by stored profiles with a high entry price for an early product; more setup.
Used by AdCreative.ai, Agiled, Articos, Badger Maps, BetterPic and 43 more · in 5 open-source projects.
It’s amazing for managing a community, it’s feature-rich, and it’s fun to use! I am also a big fan of customer io , they make our email and people management efforts way easier.
Cost: the cheapest plan that fits contacts 5k contacts, emails 20k emails, from list prices. Try your own numbers →
Cost as you grow
Each contender's cheapest usable plan as usage rises.
Before you choose
Send product events (signed up, created first project, invited teammate) from day one, even before you write any sequence. Start with one onboarding sequence that pushes users to the first useful action, then add a trial-ending and an inactive-user email. Keep lifecycle email on a different sending stream from password resets and receipts.
Other options
Real choices most makers here won't need to weigh.
BrevoDecided alongside
What the 239 makers' products here chose for their other decisions.
Resend71
SendGrid56
Postmark41
Next.js80
React19
Astro8
OpenAI API55
Claude40
Gemini API14
Supabase29
PostgreSQL14
MongoDB10
Stripe58
Lemon Squeezy6
PayPal4
Amazon Web Services
Cloudflare
Google Cloud Platform
PostHog
Mixpanel
Amplitude
Plausible Analytics