# Aspen — Free API Testing for macOS vs Devzery

Aspen — Free API Testing for macOS records 0 monthly visits with -100% month-over-month growth and Free pricing. Devzery records 2,378 monthly visits with -85.1% growth and Contact for Pricing pricing.

| Metric | [Aspen — Free API Testing for macOS](https://openaitools.app/tool/aspen-api-testing-for-macos) | [Devzery](https://openaitools.app/tool/devzery) |
| :--- | :--- | :--- |
| Website URL | https://getaspen.io | https://www.devzery.com |
| Categories | AI Testing, AI Assistant, AI Code Generator, AI Developer Tools | AI Testing, AI API, AI Agent, AI Developer Tools |
| Pricing Model | Free | Contact for Pricing |
| Monthly Visits | 0 | 2,378 |
| MoM Growth Rate | -100% | -85.1% |
| Primary Market | Global | United States |
| Direct Visits | 0 | 945 |
| Review Score | 4.6 | 4.2 |
| Saved Count | 0 | 1 |
| Supported Platforms | Website | Website |

## Aspen — Free API Testing for macOS

Aspen is a desktop API client designed specifically for macOS and specifically for REST APIs. Rather than trying to cover GraphQL, gRPC, and every other protocol, it narrows its focus so that setting up and running a request takes seconds. Everything executes locally on your machine — there is no login and no data saved to a server, which the developers frame as a zero-trust approach for teams that cannot send request and response payloads to a third party.

The AI assistant, Alfred, is the feature that separates Aspen from a plain request runner. Given the responses from a working call, it can draft the corresponding data models, produce an OpenAPI specification, and generate integration code, cutting the manual step between "the endpoint works" and "the app can call it." Aspen is developed by Treblle, an API lifecycle platform, so the tool plugs into a broader ecosystem of observability, analytics, governance, and auto-generated API documentation products.

A newer Collections feature adds collaboration to what was previously a solo tool: you can organise, import, export, and share API requests to reuse them across a team, with import from Postman and export of your own collections. Aspen itself is free to download and use, making it an easy replacement for paid clients when your work is centred on REST endpoints on a Mac.

**Pricing & Plans:** Free. Aspen is a free macOS download with no account requirement; it is developed by Treblle, which also offers paid API lifecycle products alongside a free tier.

- **Local, login-free testing:** Run API requests inside a native Mac app without creating an account, with all operations performed on your machine.
- **AI companion Alfred:** Generate data models, OpenAPI specifications, and integration code from your API responses to speed up development.
- **REST-first workflow:** The tool is optimised for REST APIs, so requests return results in under a second without protocol overhead.
- **Aspen Collections:** Organise, import, export, and share API requests, with Postman import so existing collections come across easily.
- **Part of the Treblle ecosystem:** Connect to API observability, analytics, governance, and auto-generated documentation from the same vendor.

**Strengths:** Completely free with no login or account setup; Native macOS performance keeps response times under a second; Alfred turns raw responses into models, specs, and code; No data stored externally, which suits security-sensitive work

**Limitations:** macOS only — there is no Windows or Linux build; Focused on REST, so GraphQL and other protocols are out of scope; No built-in cloud sync because nothing leaves your machine

[Profile (Markdown)](https://openaitools.app/tool/aspen-api-testing-for-macos.md)

## Devzery

Devzery is an AI-powered API regression testing platform for QA and engineering teams. Its core is a self-driving AI agent that runs end-to-end regression tests at the API level, verifying user-level functionality, validating integrations and tracking API changes in real time. The goal is to catch regressions earlier in the SDLC and shrink the time spent on manual test authoring.

The platform generates context-rich test suites from a PRD or project details, adapts tests automatically as APIs change, and produces AI-written bug reports with status, related test cases, expected versus actual results and error descriptions. It also generates Swagger documentation for APIs automatically, removing a common manual chore.

Devzery integrates with project management and CI/CD tools such as Jira, GitHub Actions and Jenkins so regression suites can be triggered on every merge or deployment. A middleware SDK with Node, Java, Python and Golang support logs API requests and responses for continuous regression coverage, and Devzery also publishes an open-source UI test case generator on GitHub.

**Pricing & Plans:** Devzery does not publish public list prices; pricing is available on request (the product site currently invites users to join a waitlist). Contact the Devzery team for plan details and a demo.

- **Self-driving API regression agent:** An AI agent runs end-to-end functional regression tests at the API level and tracks API changes in real time.
- **AI-generated test suites:** Devzery analyzes your PRD or project details to generate context-rich API test cases, including edge-case scenarios for broader coverage.
- **Automatic Swagger documentation:** AI analyses complex data structures and generates accurate, up-to-date Swagger schema definitions for your APIs.
- **CI/CD and project management integrations:** Plug into Jira, GitHub Actions and Jenkins to trigger regression suites automatically on merges and deployments.
- **Middleware SDK logging:** Middleware SDKs for Node, Java, Python and Golang log API requests and responses for continuous regression coverage.

**Strengths:** Automates API-level regression testing end to end; Generates test cases from PRDs and product context; Native integrations with Jira, GitHub Actions and Jenkins; Open-source UI test case generator available

**Limitations:** No public pricing; you must contact the team; Product is early-stage with a waitlist for new users; Some marketing claims (2x/3x multipliers) are vendor-reported

[Profile (Markdown)](https://openaitools.app/tool/devzery.md)

## Frequently Asked Questions

### How do Aspen — Free API Testing for macOS and Devzery compare in monthly traffic?

Aspen — Free API Testing for macOS has 0 monthly visits, while Devzery has 2,378. Traffic estimates describe audience size, not product quality.

### How do their growth rates compare?

Aspen — Free API Testing for macOS has a month-over-month growth rate of -100%; Devzery has -85.1%.

### How does pricing compare?

Aspen — Free API Testing for macOS: Free. Free. Aspen is a free macOS download with no account requirement; it is developed by Treblle, which also offers paid API lifecycle products alongside a free tier. Devzery: Contact for Pricing. Devzery does not publish public list prices; pricing is available on request (the product site currently invites users to join a waitlist). Contact the Devzery team for plan details and a demo.

## Alternatives

| # | Tool Name | Monthly Visits | MoM Growth Rate | Pricing Model | Summary | Profile (Markdown) |
| :--- | :--- | :--- | :--- | :--- | :--- | :--- |
| 1 | [Postman](https://openaitools.app/tool/postman) | 1,764,877 | -7.6% | Freemium | Design, test, and govern APIs — now with AI agents in the loop | [.md](https://openaitools.app/tool/postman.md) |
| 2 | [KaneAI](https://openaitools.app/tool/kaneai) | 901,340 | +13.2% | Freemium, Paid, Contact for Pricing | GenAI-native end-to-end QA agent that plans, writes and heals tests in plain language | [.md](https://openaitools.app/tool/kaneai.md) |
| 3 | [Qase](https://openaitools.app/tool/qase) | 319,213 | -25.5% | Freemium, Free Trial, Contact for Pricing, Free | Ship with confidence: one system of record for manual, automated, and CI tests | [.md](https://openaitools.app/tool/qase.md) |
| 4 | [Applitools Eyes](https://openaitools.app/tool/applitools-eyes) | 159,934 | -15.7% | Freemium, Free Trial, Paid, Contact for Pricing | AI-powered visual and functional testing that catches UI bugs on every page | [.md](https://openaitools.app/tool/applitools-eyes.md) |
| 5 | [Katalon](https://openaitools.app/tool/katalon-studio) | 158,090 | -29.6% | Freemium, Free Trial, Paid, Contact for Pricing | AI-augmented quality platform for web, mobile, API and desktop testing | [.md](https://openaitools.app/tool/katalon-studio.md) |
| 6 | [Qodex](https://openaitools.app/tool/qodex) | 140,666 | +10.1% | Contact for Pricing | Execution-backed code review that runs real API, UI and security tests on every pull request | [.md](https://openaitools.app/tool/qodex.md) |
| 7 | [TestSprite](https://openaitools.app/tool/testsprite) | 114,205 | +15.8% | Freemium | Agentic end-to-end testing that writes, runs and heals your test suite | [.md](https://openaitools.app/tool/testsprite.md) |
| 8 | [testRigor](https://openaitools.app/tool/testrigor-com) | 105,865 | -2.7% | Free Trial, Contact for Pricing, Free | Write end-to-end test automation in plain English, no code required | [.md](https://openaitools.app/tool/testrigor-com.md) |
| 9 | [Maestro Studio Desktop Beta](https://openaitools.app/tool/maestro-studio-desktop-beta) | 102,589 | -22.4% | Freemium | Open-source, human-readable UI testing for mobile and web | [.md](https://openaitools.app/tool/maestro-studio-desktop-beta.md) |
| 10 | [Momentic](https://openaitools.app/tool/momentic) | 68,819 | -15.2% | Freemium, Usage-based, Enterprise | Agentic AI QA engineer for web, iOS, and Android testing | [.md](https://openaitools.app/tool/momentic.md) |

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Source: https://openaitools.app/compare/aspen-api-testing-for-macos-vs-devzery

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