I got tired of Postman's cloud sync and RAM bloat, so I built an offline, Rust-native alternative

Description and use

ReqX is a fast, offline-first API client built with Rust and Tauri that removes Postman’s cloud dependency, limits, and high memory usage.

Problem

Postman’s recent updates forced mandatory cloud logins, added telemetry, limited the collection runner to 25 runs/month, and consumed over 1.2 GB of RAM on heavy Electron runtimes, making it unsuitable for developers needing a fast, private, and organized API client for 30+ microservices.

Outcome

ReqX delivers a fast, private, and organized API testing experience with sub‑second startup, <100 MB RAM, unlimited runner, and native Git workspace export, eliminating Postman’s cloud dependency and performance bottlenecks.

Workflow

• Export Postman collection (v2.1).
• Open ReqX and click Import.
• Verify that requests, folders, environments, and pm.* test scripts run immediately. (3‑second migration)

Evidence

Postman was my go‑to tool for API testing… mandatory cloud account logins, telemetry tracking, runner restrictions (limited to 25 runs/mo), and eating upwards of 1.2 GB of RAM on heavy Electron runtimes.

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ReqX introduces Project Directories: Group related collections into parent folders ([ERP System] -> Inventory API, Billing API, Auth API).

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Sub‑second startup (~0.8s) vs 10+ seconds on Postman.

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Memory footprint under 100MB RAM (built with native Rust & WebAssembly).

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ReqX exports clean directory JSON structures that you can commit straight to your team's Git repo without merge conflicts.

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ReqX ships with a dedicated 600KB CLI (reqx run) to automate collection tests in GitHub Actions, GitLab CI, or Jenkins.

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