Loops vs Postmark
A source-aware comparison of pricing, documented capabilities and workflow fit.
Short answer
- Price: not directly comparable — Loops is free tier available, Postmark is usage-based pricing.
- How to start: Loops is free tier available, Postmark is usage-based pricing.
- Where they differ: on what we checked they match — both offer public api and sso (saml).
These lines are generated from the pricing we track, not from a paid placement. How we score tools.
What Loops is
Loops is email for software companies: transactional and marketing sends in one place with a modern API. Keeping product and marketing email in one place with a modern API suits software teams who do not want two systems and two reputations. It is young, so campaign tooling is thinner than the established marketing platforms.
What Postmark is
Postmark focuses narrowly on transactional email and is known for delivery speed and inbox placement, keeping marketing mail on separate infrastructure. Keeping transactional and bulk mail on separate infrastructure is the reason deliverability holds up, and it is also the constraint: this is not where you send campaigns. Message streams make that separation explicit rather than optional.
Side by side
| Loops | Postmark | |
|---|---|---|
| Category | Marketing | Marketing |
| How to start | Free tiernot a monthly price | Usage-basednot a monthly price |
| Public API | Yes | Yes |
| Mobile app | No | No |
| Open source / self-hostable | No | No |
| SSO (SAML) | Yes | Yes |
| Visit | Loops ↗ | Postmark ↗ |
What Loops is built to do
- Unified sends
- Handles transactional and campaign email from one account.
- Developer API
- Triggers messages from application events through a typed API.
- Audience filters
- Segments contacts on product attributes for campaigns.
What Postmark is built to do
- Separate message streams
- Keeps transactional and broadcast mail on distinct sending reputations.
- Delivery analytics
- Reports bounces, opens and time-to-inbox per message.
- Inbound parsing
- Turns replies into structured webhooks for the application to process.
Choose Loops if
- Software companies that want one tool for product and marketing email.
Choose Postmark if
- Teams where receipts, resets and alerts must arrive.
Evidence and freshness
Where a claim on this page comes from a vendor page, it is linked here.
Loops: pros & cons
- Clean developer experience
- Transactional and campaign email together
- Simple, readable pricing
- Younger than established providers
- Fewer advanced segmentation features
- Smaller deliverability track record
Postmark: pros & cons
- Reputation for reliable inbox delivery
- Separate streams for transactional and broadcast
- Detailed delivery diagnostics
- Strict about what counts as transactional
- Costs more per message than bulk providers
- Not intended for marketing campaigns
Our verdict on Loops
Pleasant to work with. Very large senders should still test deliverability carefully.
Our verdict on Postmark
If delivery reliability matters more than price per message, this is the one to beat.