Laverna

Laverna aims to be an open-source, encrypted alternative to Evernote. Open source makes it more trustworthy than Evernote, because anyone can inspect the code.

Encryption makes it more private than Evernote. Evernote are a US-based company whose privacy policy recently caused a lot of controversy because they planned (then backtracked) on letting their employees read customers' data. Nothing prevents them from deciding to try that again in the future. Evernote might be functional, but they store your data unencrypted, which means that:

a) if hackers breach Evernote's servers (has happened before), all your personal data is out there in some hackers hands
b) three letter agencies (NSA, FBI, etc.) are allowed legally to demand that Evernote hands your data over to them, and the law says Evernote might be prevented even from telling you that this has happened.
c) you should ask yourself: even if none of the above happens, where will copies of my data be in 20 years time? In whose hands? On whose servers? What will the law be then? Will you want whoever will be then in power/controlling Evernote's servers to have access to all your receipts, notes, captured webpages, boarding cards and whatever else you put into Evernote?

Using encryption, as Laverna does, gets around problems like these. Even if hackers steal your data, the fact it's encrypted means they can't read it. Same for three letter agencies (if the encryption is done well, like via AES-256) and whoever might get your hands on the data in years to come.

So the question is now about Laverna's functionality. You can test Laverna online, here.

Good Stuff

• Laverna is cross-platform (Mac, Windows and Linux). Evernote doesn't even work on/support Linux
• Laverna has excellent basic note-taking (you can use markdown, a Wisiwyg-type editor, and include pictures)
• Laverna has excellent searching built in.
• Laverna encrypts your data by default (see points above)

Why it's not quite there yet

• Sync is not well worked out. Ideally, to challenge Evernote, you'd want to be able to sync your encrypted data using the service of your choice. Laverna claims to connect to Dropbox, but that's only one service and there have been many complaints it doesn't work well. Ideally, the developers would store the info Laverna uses in an encrypted file/folder which can be synced using the service of anyone's choice.
• Pictures can be included in your notes, but not resized. Very annoying.
• No Android app (it's promised to come soon; iOS is available)
• App does not support some of Evernote's more sophisticated features, such as scanning.

Alternatives?
If you want an Evernote alternative for the following functions but mobile isn't important to you, consider TagSpaces:

• Mac, Windows, Linux
• Search/tagging
• open source
• Local (Sync optional)
• Encryption optional (with Cryptomator - works great)

Supports Markdown and is secure enough that I can use it at work. Everything I want (except a dark theme).

Proof-of-Concept

I recommend you to use Joplin instead. Joplin is stable, highly functional Evernote alternative with ENAX import, web clipper, local storage for any file types, fast math notions, and inline HTML supported! Still has unpolished design, and hasn't public web-client, but works!

Of course, it's not Evernote killer app at the moment as it was declared. And no alternative for those who use Evernote to save parts of Web Pages.

Moreover, it's too buggy and unpredictable at the moment. Examples:

• HTML code always converts to naked tags and UTF-8 characters - no way to keep a code untouched, even with grave accents or pre tags.
• FS Module saves unencrypted .md files with encrypted JSON. Privacy-oriented, either?)
• Attached images are NOT syncing with anything at all. It looks strange because developers say that this feature should attach any files and sync them. But in fact, if you are trying to attach something except images the form just will not work. It's some kind of bug.
• Too slow math notation processing with MathJax
• Non-latin tags unsupported.
• Stripes in code frame it's just a fixed background image. That's why code scrolls over them independently.
• Search function buggy. If you want to exit from search mode, you can't. You should select something otherwise you will lose notes tree panel 'til reload notes panel again.
• The Android app can't export settings and data, bug too. That's why you should not start using on the smartphone, you just will not be able to sync other devices after.
• Terrible memory leaks with the desktop client app (2.7.4 RC1).

Personally, I think that such kind of application should have alternative markup options, to arrange and align content inside notes. For example, I use many technical illustrations. Yes, it's not good enough in Evernote too, but Laverna doesn't have something similar at all.

Summary:

It's good for use only if you are keeping pure text notes, and if an encryption via Dropbox is important for you. And also if you don't have hundreds of them because organizations could be difficult. Example: when you add a tag to the note, it creates tag entry in the notebooks list. But, if you change it there or even delete it, documents will NOT be affected. So you can't make changes in the entire database and lost connections between notes and tags easily.
That's if you are looking for Evernote alternative which allows working freely, you should move on. At least 'til Laverna will not be fixed and improved as a minimum in those aspects which declared and should work.

[Edited by M_O_Z_G, October 21]

It is possible to search in notes on Windows app ?

Besides not having an icon it's build is light-weight the app works great has multiple translations and can do basic formatting. While also being OpenSource and taking a more grown approach to synchronizing using multiple sources for selection while also not requiring a login which can also be run on a local-network use only.

Laverna is notetaking software, but I'm looking for to-do list software.

Made me lose all my notes when trying to sync with dropbox. Just horrible.