Parserr vs Stalwart mail-parser

Parserr turns information from incoming emails and documents into structured data for other systems. Users can configure extraction rules and send results through a visual interface without coding. Its processing covers invoices, documents, email, PDFs, resumes, and attachments; supported files include Word, PDF, CSV, spreadsheets, DOC, XLSX, XLS, TXT, LOG, and KML. The PDF parser can extract metadata, text, graphics such as handwritten notes, tables of contents, attachment names and IDs, scanned text, and font or style information.

Direct integrations include Excel, HubSpot, Salesforce, Google Sheets, Power Automate, Zapier, SharePoint, SFTP, and Webhook, with more app connections through Zapier or Power Automate. The free plan costs nothing and allows 15 emails and 10 documents per month. All plans include a 30-day free trial; paid plans start at $49.99 a month. The hosted service does not include storage, so clients are responsible for saving parsed data. Parserr says browser traffic uses 256-bit SHA encryption and stored data in Amazon S3 uses AES-256 server-side encryption. It states that it is GDPR compliant and supports retrieval or deletion of personal data.

Stalwart mail-parser is a free, open-source Rust library for parsing email messages. It supports Internet Message Format RFC 5322, MIME RFC 2045–2049 and other internet messaging RFCs, while attempting to handle messages that depart moderately from those standards. Parsed output includes a MIME tree, text and HTML body lists, and attachments. If one alternative is missing, the library can convert HTML to plain text or plain text to HTML. SIMD kernels accelerate scanning on supported targets, while transfer decoding and charset conversion wait until content is read. Returned strings generally reference the original input message. WHATWG encoding labels are recognized, and the optional full_encoding feature adds legacy multibyte sets including Shift_JIS, Big5 and GB18030. Defaults allow nesting depth 64, 10,000 MIME parts and three decoded nested-message levels. Rust 1.98 is required. No feature is enabled by default; serde adds serialization. The library is licensed under MIT or Apache-2.0 and costs nothing.