Best forComplex behavior-driven journeys across email, push, SMS and in-app messages.
Trade-offPriced by stored profiles with a high entry price for an early product; more setup.
Used by 47 makers' products for this
Loops alternatives
Not a ranking: each option is described by the situation it fits, with its trade-off, whether it's open source or free to start, whether AI coding agents can work with it, and how many makers' products use it for this job.
3 open source or self-hostable8 with a free tier7 ready for AI agents
On Product Hunt, people weigh Loops against: Resend, Plunk, Postmark. Some solve a neighbouring job rather than the same one.
For lifecycle email
The whole decision →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.
Loops (Email for SaaS): Event-triggered onboarding sequences and transactional email from one tool, with a free tier to start. Trade-off: Email only; fewer segmentation and multichannel features than larger platforms.
Best forB2B SaaS where messages depend on both the user and the company account they belong to.
Trade-offNo permanent free plan; priced by subscriber count.
Used by 8 makers' products for this
Free tierllms.txtIn Lovable
Best forMarketing and automated email priced by emails sent, with SMS and WhatsApp in the same account.
Trade-offEach email tier also caps how many contacts you can hold on the lower plans, and automations beyond the basics need a higher plan.
No maker product tracked for this yet
For transactional email
The whole decision →Transactional or marketing. Transactional services send one message the moment your app triggers it (a password reset, a receipt). Marketing/lifecycle tools send sequences and campaigns to lists. Most apps need the first on day one and the second later.
Loops (Lifecycle / marketing): SaaS onboarding sequences triggered by product events, with transactional sending included.
From $19.95/mollms.txtIn Replit
Best forOne vendor for both jobs at large scale.
Trade-offHeavier than a small team needs.
Used by 1055 makers' products for this
Best forA modern developer API with email templates written as React components.
Trade-offA younger service than Postmark or SES, and costlier than SES at very high volume.
Used by 942 makers' products for this
Best forDeliverability when the mail has to arrive within seconds.
Trade-offStrict about transactional-only sending — marketing email goes through a separate stream — and the free developer plan is small.
Used by 612 makers' products for this
Free tierFrom $15/moIn Lovable
Best forHigh volume and inbound email parsing and routing.
Trade-offIts dashboard and API are older and busier than newer services, and the free tier is small.
Used by 47 makers' products for this
From $0.10 per 1k emails
Best forSending at high volume, where cost per email matters more than tooling.
Trade-offBare-bones; you build templates, bounce handling and tooling yourself.
Used by 4 makers' products for this
Plunk
Open-source platformBest forTransactional emails, event-triggered sequences and newsletters in one open-source tool, billed per email with no monthly fee.
Trade-offA small team and a smaller ecosystem than the established APIs; its old Node SDK is deprecated, so you call the REST API or SMTP.
Used by 5 makers' products for this
Open sourceFree tier
Best forSending email from Node.js through any SMTP server or provider, without tying your code to one vendor's SDK.
Trade-offOnly sends — deliverability, bounces, suppression lists and logs come from whatever SMTP service is behind it.
No maker product tracked for this yet
Best forAn open-source Resend-style dashboard and API for transactional and marketing mail, on top of Amazon SES prices.
Trade-offA young project; self-hosting means running it and managing your own SES account, sending limits and reputation.
No maker product tracked for this yet
Free tierllms.txtIn Lovable
Best forA free plan that covers both transactional sending and newsletters, with SMS and WhatsApp in the same account.
Trade-offThe free plan caps sends per day; its developer API and docs are less polished than transactional-first services.
No maker product tracked for this yet