Yes, Airtable is legit. All of the data entered into Airtable remains yours, and Airtable uses 256-bit SSL/TLS encryption for content in transit, and 256-bit AES encryption for content at rest. Airtable claims that it backs up its production data to a separate, isolated location and all backups are encrypted.\ Airtable has a good reputation among its users, with a 4.7 star rating on the Google Play Store (with 2.6K ratings) and 4.8 stars on the iOS App Store (with 14.6K ratings).
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Airtable
Realtime spreadsheet-database hybrid