Kadira is used for production monitoring.

S3 serves as zero-knowledge temporary storage. Files are encrypted in the browser before being uploaded in chunks to S3. When the target recipient downloads them the chunks are reassembled and decrypted in the browser. Files expire after a week and the encrypted chunks are permanently deleted from S3.

cloak.ly's UI is built using a pretty simple bootstrap template.

Without Meteor cloak.ly could not have been built as quickly by such a small team. Meteor was instrumental to getting an MVP up quickly and dealing with the complexities of browser-based encryption.

nginx is used in a pretty straightforward manner to promote http to https and convert www.cloak.ly to cloak.ly

One of the best aspects of Kadira is the level of detail it provides on errors. This makes it easy to track down production bugs and swat them.