AppBreakup

Slumber alternatives: 5 apps ranked by verified data

Facts checked Oct 25, 2026AppBreakup editorialHow we rank

Common reasons people leave Slumber: collections are edited as YAML by hand, and HTTP only, no gRPC or WebSockets. We ranked 5 alternatives by how directly each one replaces Slumber, then by reviews, real visits and how recently each app's facts were checked against its own website. Posting currently ranks first.

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Show all 5 alternatives

The best Slumber alternative for…

The highest-ranked app in this list for each need.

Posting logo

Best Slumber alternative for most people

Posting

A richer terminal interface with gRPC and GraphQL support.

ATAC logo

Best Slumber alternative for a free option

ATAC

A Postman-style terminal client that imports Postman collections.

Hurl logo

Best Slumber alternative for open source

Hurl

Plain-text request files with assertions, for CI tests.

Bruno logo

Best Slumber alternative for Mac

Bruno

A desktop app with collections stored as plain files.

httpYac logo

Best Slumber alternative for Windows

httpYac

Runs .http request files from the CLI or VS Code.

Posting logo

Best Slumber alternative for Linux

Posting

A richer terminal interface with gRPC and GraphQL support.

Slumber alternatives: common questions

What is the best alternative to Slumber?

Posting ranks first right now. A richer terminal interface with gRPC and GraphQL support. ATAC and Hurl follow it in our ranking.

Is there a free alternative to Slumber?

Yes. Posting (open source), ATAC (open source), Hurl (open source) and Bruno (open source) have a free option. Check each app's verified facts for current plan limits.

Is there an open-source alternative to Slumber?

Yes: Posting, ATAC, Hurl and Bruno, plus 1 more in the list above.

Which Slumber alternatives work on Linux?

Posting, ATAC, Hurl, Bruno and httpYac run on Linux.

Why do people switch from Slumber?

The complaints we hear most: collections are edited as YAML by hand; HTTP only, no gRPC or WebSockets; small volunteer project.

How is this list ranked?

Every app is scored with the same published formula: how directly it replaces Slumber, reviews (weighted by verification), visits from AppBreakup, how recently its facts were checked against its own website, and reader votes.