CloudConvert Audio Converter vs Zamzar API
CloudConvert Audio Converter
cloudconvert.comZamzar API
developers.zamzar.comSide by side
| Figure | CloudConvert Audio Converter | Zamzar API |
|---|---|---|
| Price from | $10/mo | $25/mo |
| Free plan | Yes | Yes |
| Free trial | — | — |
| Open source | — | — |
| Web | Yes | Yes |
| Windows | — | Yes |
| macOS | — | Yes |
| Linux | — | Yes |
| iOS | Yes | Yes |
| Android | Yes | Yes |
| API | Yes | Yes |
| Plans published | 4 | 4 |
| Spec score · File Conversion Software | 9.3 (#1) | 8.6 (#9) |
| Spec score · File Converter Software | 9.3 (#1) | 8.6 (#7) |
| Spec score · Image Converter Software | 9.4 (#2) | 8.6 (#9) |
| Spec score · Image converters | 9.3 (#3) | 8.9 (#5) |
| File retention | Files are retained only for processing and deleted immediately afterward; the service does not provide permanent storage. | Free web conversions are stored for up to 24 hours, while paid users’ files remain until deletion or expiry under the applicable service terms. |
| Founded | 2012 | LinkedIn and Zamzar’s history identify 2006 as the service’s founding year by brothers Chris and Mike Whyley. |
| Headquarters | Grünwald, Germany | The registered office is The Courtyard, Shoreham Road, Upper Beeding, Steyning, West Sussex BN44 3TN, United Kingdom. |
| Notable news | CloudConvert announced a hosted MCP server on September 3, 2026, connecting assistants such as ChatGPT and Claude to conversion, compression, merging, watermarking and OCR tools. | Zamzar’s about page records that its API passed 50 million files and more than one million requests per day in March 2026. |
| Rating on Capterra | 4.3 out of 5 from 42 reviews. | 4.6 out of 5 from 22 reviews |
| Rating on G2 | 4.7 out of 5 from 21 reviews. | 4.5 out of 5 from 17 reviews |
| Rating on GetApp | 4.3 out of 5 from 42 reviews. | 4.6 out of 5 from 22 reviews |
| SDKs | Official API SDKs are available for PHP, Node.js, Python, Ruby, Java and .NET. | Official SDKs are provided for Java, PHP and Python, with code examples for cURL, Node.js, Ruby and C#. |
| Support | The About page says CloudConvert provides free and timely support directly from its builders. | The pricing page gives plan-specific response times of one to three days, and the company says its support team is staffed by software developers. |
| What it does | CloudConvert converts audio files online, including MP3, M4A, WAV and WMA, with controls for quality and file size. | Zamzar provides cloud file conversion between documents, images, video, audio, e-books, compressed files and CAD formats through a REST API. |
Plans
CloudConvert Audio Converter
- FreeFree
- Subscription$10 a month
- Package$18, paid once
- EnterprisePriced on request
In their own words
CloudConvert Audio Converter
CloudConvert Audio Converter is an online service for converting audio files through a web application or API. It supports AAC, AC3, AIF, AIFC, AIFF, AMR, AU, CAF, DSS, FLAC, M4A, M4B, MP3, OGA, OPUS, SF2, SFARK, VOC, WAV, WEBA, WMA, and other listed types. Conversion controls let users adjust audio quality and file size, and batch conversion is available. CloudConvert serves individual users and corporate customers through its API. Automation integrations include Zapier, Make, Microsoft Power Automate, and n8n; storage workflows can involve Amazon S3, Google Drive, Dropbox, OneDrive, and SharePoint. API v2 includes official PHP, Node.js, Python, Ruby, Java, and.NET SDKs plus a CLI. The free plan costs nothing, with 10 credits per day, a 1 GB file limit, five-minute processing limit, five concurrent tasks, and low processing priority. Package, Subscription, and Enterprise plans list prices as “...” or custom. CloudConvert says files are processed in isolated containers and deleted afterward.
Zamzar API
Zamzar API is a REST-based HTTP service for adding file conversion to mobile, web, or desktop applications. It supports more than 1,100 conversion types across documents, video, images, audio, eBooks, CAD, 3D, and compressed files. Files can come from a user's machine or be reachable through HTTP, FTP, SFTP, or Amazon S3. Zamzar says its cloud service can handle demand from one file to 10,000. Developers can use official Java, PHP, and Python SDKs, plus code samples for C#, cURL, Node.js, and other languages. The free Test plan costs nothing, requires no card, and includes 100 credits, a 1 MB maximum file size, one-day file storage, and a three-day support response. Paid plans start at $25 /month. Successful conversions use at least one credit, and unused monthly credits do not roll over. Zamzar describes the API as a conversion service, not a CDN; converted files should be retrieved through the API. Accounts include free sandbox testing subject to file-size and job-count limits.