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Loops vs Postmark

A source-aware comparison of pricing, documented capabilities and workflow fit.

Short answer

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

LoopsPostmark
CategoryMarketingMarketing
How to startFree tiernot a monthly priceUsage-basednot a monthly price
Public APIYesYes
Mobile appNoNo
Open source / self-hostableNoNo
SSO (SAML)YesYes
VisitLoopsPostmark

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

Vendor pricing page verified · reviewed 2026-08-31

Postmark

Vendor pricing page verified · reviewed 2026-08-31

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.

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