PDF4me API vs Zamzar API

PDF4me API provides document-processing endpoints and SDKs for developers, alongside browser-based PDF tools. The API supports conversion, OCR, signing and parsing; the web tools can convert, merge, compress, split, sign and edit PDFs. AI processing can parse invoices, classify files and extract structured data as JSON. SDKs are available for C#, Java, Python, JavaScript (Node.js) and Salesforce Apex. Listed integrations include Power Automate, Make, Zapier, n8n, RapidAPI, Microsoft Teams and Google Workspace, and the maker also offers no-code automation for workflow builders. Most endpoints use one call per document, while high-quality conversions, OCR and AI features use one call per page. The service says documents are processed in EU or US regions depending on account setup, deleted within minutes after completion and not retained for training. Free one-time call packs are listed from 500 to 25,000 calls. A custom sales option is listed for more than 25,000 calls, without a stated price.

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.