Impler.io - Powerful CSV & Excel Import experience for SaaS 🚀 Save months building data import experience from scratch 💰
EtherCalc - EtherCalc is a web spreadsheet.
csvbox - Spreadsheet importer for your web app, SaaS or API
Aspose.Cells for Cloud - Aspose.Cells for Cloud is a REST based API for processing spreadsheets in the cloud.
Layercode UseCSV - Add CSV import functionality to your app in minutes
SSuite Axcel Professional Spreadsheet - This powerful and professional spreadsheet has all the tools you need to calculate, analyse, summarize, and present your data in numerical reports or colourful graphics.