Loops

Loops is the modern email platform built specifically for SaaS companies — combining marketing campaigns, lifecycle automations, and transactional email under one Notion-style editor and a developer-first API. We rate it 82/100 — the fastest way for a technical SaaS founder to ship every email their app needs, with rough edges only when you push into complex branching workflows.

What is Loops?

Loops was founded in early 2022 by Chris Frantz (CEO) and Adam Kaczmarek (CTO) and went through Y Combinator's W22 batch. Frantz had previously sold a no-code project to Unbounce, and the pair noticed that every SaaS idea they prototyped at YC needed essentially the same email plumbing — onboarding sequences, password resets, billing receipts, product update broadcasts. They built Loops as the “one platform” answer to that recurring need.

The pitch is unusually focused: instead of competing with general-purpose tools like Mailchimp or HubSpot on every front, Loops only serves software companies and only does the three jobs those companies actually need — marketing email, lifecycle product email, and transactional email — all from a single dashboard, single contact database, and single sending domain. The company crossed $731,000 in revenue within two years of launch and raised a Series A in 2024 to scale.

Key Features of Loops

• Notion-style block editor: Type / to insert blocks the same way you would in Notion. Most teams send their first campaign within 10 minutes of signup.
• One database for all email: Marketing contacts, transactional events, and product announcements share the same audience tables — no double-syncing between SendGrid and Mailchimp.
• Audience filters and event-triggered loops: Build segmented broadcasts and behavior-triggered sequences (welcome series, trial-ending nudges, win-back) without leaving the app.
• API-first transactional sending: A clean REST + Node/Python/Go SDK that lets engineers send transactional mail with the same tracked deliverability as marketing email — no separate SendGrid account.
• Native integrations: Direct connectors for Segment, Stripe, RevenueCat, Intercom, and Slack mean events flow in without webhook plumbing.
• Excellent deliverability: Loops handles the warm-up, DKIM/DMARC setup, and dedicated IPs invisibly — users on Reddit's r/SaaS routinely call it the “just works” option versus Postmark or Mailgun for early-stage teams.

What Users Say About Loops

Sentiment on Reddit's r/SaaS and r/webdev is strongly positive — recurring praise centres on the clean editor, fast onboarding, and friendly free tier (4,000 sends to 1,000 contacts is enough to validate a launch). The Product Hunt page shows hundreds of upvotes and comments from technical founders calling it “the SendGrid replacement I didn’t know I needed.”

The most consistent complaint, raised in multiple Hacker News and Reddit threads, is the lack of visual workflow builders with branching logic. Power users coming from Customer.io note that complex multi-path automations (“if user opened email A but didn’t click and is on the Pro plan...”) feel awkward in Loops's flat sequence model. A handful of users have also reported being declined for “restricted industries” — Loops actively turns away certain B2B verticals to protect deliverability, which is unusual transparency but frustrating if you're the one declined.

Loops Pricing

Loops uses a single feature-flat pricing model — every plan has every feature, and you only pay more as your subscriber count grows. There are no “Premium tier required” gates on automations, segments, or transactional sending.

Plan	Price	What's Included
Free	$0/month	4,000 sends/month, 1,000 stored contacts, full feature access, includes Loops branding in email footer
Pro (entry)	$49/month	~3,000 contacts, unlimited sends, no branding, full feature access
Pro (growth)	~$159/month	Higher contact tiers, same unlimited sends and feature set
Custom	Contact	Enterprise contact volumes, dedicated IPs, SSO, priority support

Transactional email is included on every plan at no additional charge — a meaningful differentiator versus stitching Mailchimp + SendGrid together.

Who Should Use Loops?

Best for: Solo founders and small SaaS teams (Seed to Series A) who want one place to send every kind of email their product produces, without operating two separate platforms. Particularly strong for technical founders who appreciate the API-first design and don’t want to fight Mailchimp's UI.

Not ideal for: E-commerce stores (Klaviyo or Omnisend are stronger here), enterprise marketing teams that need deeply branched journey builders (use Braze or Customer.io), or any business in a category Loops has flagged as restricted.

Pros and Cons

Pros:

• One platform for marketing, product, and transactional email — no platform-stitching
• Notion-style editor is the fastest in the category — first send routinely happens in under 10 minutes
• Generous free tier (1,000 contacts / 4,000 sends) is enough to validate a launch
• API and SDKs are first-class, not an afterthought
• Feature-flat pricing — you don’t pay extra to unlock automations or segments
• Transactional included at no extra cost

Cons:

• No visual branching workflow builder — complex multi-path automations are clunky
• Limited to SaaS — declines applications from many B2B and regulated verticals
• Less mature analytics than Customer.io or Braze for cohort-level analysis
• Editor occasionally has undo/redo bugs, per Reddit reports
• Web-only — no native mobile or desktop apps

Alternatives to Loops

Resend — developer-first transactional email, lighter on the marketing side. Better if you only need transactional. Beehiiv — newsletter-first publishing, weak on transactional. Buttondown — minimalist newsletters for indie writers, not SaaS. Customer.io — far more powerful workflow builder but 5–10× the price and a steeper ramp.

Verdict: Is Loops Worth It?

For SaaS founders running anything from a side project to a Series A startup, Loops is the path of least resistance. The free tier is generous enough to launch on, the editor genuinely is the fastest in the category, and the unified marketing/product/transactional model means you stop paying two vendors and gluing them together. We rate it 82/100 — held back from a higher score only by the lack of branching workflow builders and the SaaS-only positioning that excludes legitimate businesses outside that bubble. If you want one less integration to worry about and you ship software, start here.

Frequently Asked Questions

Is Loops free?

Yes — Loops has a permanent free plan that includes up to 4,000 sends per month to 1,000 stored contacts, with full feature access. The free plan adds Loops branding to your email footer; paid plans (starting at $49/month) remove it.

Does Loops handle transactional email?

Yes. Transactional email (password resets, receipts, alerts) is included on every plan at no extra charge. You don’t need a separate SendGrid, Postmark, or Mailgun account.

How does Loops compare to Resend?

Resend is purely a transactional/developer email API. Loops covers transactional plus marketing campaigns and lifecycle automations from one platform. If you only need transactional, Resend is leaner; if you need marketing too, Loops avoids running two tools.

Is Loops open source?

No — Loops is a hosted SaaS product. There is no self-hostable version.

What integrations does Loops support?

Loops has native integrations with Segment, Stripe, RevenueCat, Intercom, Slack, and Zapier, plus a REST API and official Node, Python, and Go SDKs.

Who founded Loops?

Loops was founded by Chris Frantz (CEO) and Adam Kaczmarek (CTO) and went through Y Combinator's W22 batch in early 2022.