Requestly Chrome extension review (2026): features, privacy and alternatives
Disclosure: we build a competing extension. Our test method is public and our data is our own.
The short answer
Requestly remains a capable Chrome HTTP interceptor for headers, redirects and API mocking. Its official documentation says intercepted traffic stays local, while rule configuration can sync to the cloud and anonymous analytics can be disabled. Choose it for broad features and shared workspaces; choose a smaller local-first tool when you want solo rules with less account and sync surface.
What does the Requestly Chrome extension do?
Requestly's HTTP interceptor covers redirects, request and response headers, request bodies, scripts, delays and API response mocking. Its official product page says multiple response-modification rules are available for local testing on the free plan, while paid plans focus mainly on collaboration, syncing and team workflows.
Requestly documents local interception together with optional cloud-synced rule configuration and team workspaces.— Requestly product, infrastructure and pricing documentation, checked 2026-07-16
What stays local, and what can sync?
Requestly's infrastructure documentation says intercepted requests and responses remain on the device. Rule configurations may be stored in Firebase for cross-device sync, syncing can be disabled, and anonymous product analytics can be switched off. That distinction matters when rules contain internal URLs or credentials.
| Area | Documented behavior |
|---|---|
| Intercepted traffic | Processed locally on the device |
| Rule configuration | Can sync through Requestly's cloud; syncing can be disabled |
| Anonymous analytics | Enabled for product events with an opt-out setting |
Who should choose an alternative?
Requestly is the stronger fit when you need a broad rule set, cloud collaboration and enterprise controls. For a solo Chrome workflow centered on local header, redirect and mock rules, a narrower local-first extension can reduce account, sync and interface overhead. Disclosure: we build NetworkRules, one such alternative.
Better alternatives
Header-focused, freemium.
Local, no telemetry, record → mock in three steps.
Open-source, unmaintained.
Methodology. Source review, checked 2026-07-16: https://requestly.com/products/http-interceptor/modify-and-mock-apis/ ; https://docs.requestly.com/security-privacy/infrastructure ; https://requestly.com/pricing/ . No unpublished packet-capture claim is used in this revision.